ANTIMICROBIAL AGENTS AND CHEMOTHERAPY VOLUME 23 NUMBER 1 * JANUARY 1983 Leon H. Schmidt, Editor-in-Chief (1985) University of Alabama in Birmingham Birmingham, Alabama George A. Jacoby, Jr., Editor (1985) Massachusetts General Hospital Boston, Massachusetts Herbert L. Ennis, Editor (1987) Roche Institute of Molecular Biology Nutley, New Jersey Robert C. Moellering, Jr., Editor (1987) New England Deaconess Hospital Boston, Massachusetts Robert L. Hamill, Editor (1985) Eli Lilly & Company, Inc. Indianapolis, Indiana John A. Washington II, Editor (1986) Mayo Clinic Rochester, Minnesota EDITORIAL BOARD Norris Allen (1983) Vincent T. Andriole (1984) John P. Anhalt (1984) Bascom F. Anthony (1985) Donald Armstrong (1983) George R. Aronoff (1983) Robert Austrian (1983) Richard H. Baltz (1984) Arthur L. Barry (1983) John D. Bartlett (1984) Michael Barza (1985) John E. Bennett (1984) Richard F. Bergstrom (1985) Gerald P. Bodey (1983) Lawrence E. Bryan (1985) Ward Bullock (1984) D. Buyske (1983) Anthony Chow (1985) C. Glenn Cobbs (1983) Paul S. Cohen (1983) William A. Craig (1984) Nigel A. C. Curtis (1983) Naomi Datta (1984) Lawrence E. Day (1983) William E. Dismukes (1984) R. Gordon Douglas, Jr. (1983) John C. Drach (1984) Theodore Eickhoff (1985) Gertrude B. Elion (1984) Arthur English (1983) Robert J. Fass (1985) Stuart Feldman (1985) Sydney Finegold (1985) Robert J. Fitzgerald (1983) Martin Forbes (1983) Dale N. Gerding (1985) David Gilbert (1984) Anthony J. Glazko (1984) Irving H. Goldberg (1985) Richard H. Gustafson (1984) Jack Gwaltney (1983) Wendell H. Hall (1983) Maurice W. Harmon (1984) Joseph Hawkins, Jr. (1985) Michael Higgins (1983) Dah Hsi Wang Ho (1983) Richard Hornick (1983) Milton Huppert (1983) George Gee Jackson (1983) James H. Jorgensen (1984) William J. Jusko (1983) A. W. Karchmer (1985) Donald Kaye (1985) George S. Kobayashi (1985) Donald J. Krogstad (1983) Felix Leitner (1983) Stephen A. Lerner (1983) Matthew E. Levison (1984) Stuart B. Levy (1983) Friedrich C. Luft (1984) Joan Lusk (1983) R. Luthy (1983) Francis L. Macrina (1985) George H. McCracken (1984) Gerald Medoff (1983) Michael Miller (1984) Barbara Minshew (1985) Bernard Moss (1984) Barbara E. Murray (1984) John D. Nelson (1983) Harold C. Neu (1983) J. F. Niblack (1983) James T. Park (1985) T. J. Perun (1983) Lance R. Peterson (1985) Burton M. Pogell (1984) Paul Quie (1983) Michael Rein (1983) W. H. G. Richards (1983) Richard Roberts (1985) Ian M. Rollo (1985) Richard Root (1983) John P. Rosazza (1983) Jon E. Rosenblatt (1985) Merle Sande (1985) Christine C. Sanders (1984) W. Eugene Sanders (1984) Jerome J. Schentag (1985) F. C. Sciavolino (1985) Oldrich K. Sebek (1983) William M. Shannon (1983) Charles Shipman, Jr. (1985) Robert W. Sidwell (1984) Walter Siegenthaler (1983) P. Frederick Sparling (1984) Brian G. Spratt (1983) Harold Standiford (1985) R. Sutherland (1985) Vera L. Sutter (1984) Morton N. Swartz (1985) Richard B. Sykes (1985) Francis P. Tally (1984) Alexander Tomasz (1985) Ralph Tompsett (1985) Michael Waring (1984) Bernard Weisblum (1985) Peter G. Welling (1985) Richard Wenzel (1983) Lowell Young (1985) Pauline K. W. Yu (1985) Walter G. Peter III, Director, Publications Helen R. Whiteley, Chairman, Publications Board Linda M. Illig, Managing Editor, Journals Deborah J. Shuman, Production Editor Antimicrobial Agents and Chemotherapy (ISSN 0066-4804), an interdisciplinary publication of the American Society for Microbiology, 1913 I St., NW, Washington, DC 20006, is devoted to the dissemination of knowledge relating to all aspects of antimicrobial agents, anticancer agents, and chemotherapy. Instructions to authors are published in the January issue each year; reprints are available from the editors and the Publications Office. Antimicrobial Agents and Chemotherapy is published monthly, and the twelve numbers are divided into two volumes per year. The nonmember subscription price is $145 per year; single copies are $14. The member subscription price is $29 (foreign, $36 [surface rate]) per year; single copies are $7. Correspondence relating to subscriptions, reprints, defective copies, availability of back issues, lost or late proofs, disposition of submitted manuscripts, and general editorial matters should be directed to the ASM Publications Office, 1913 I St., NW, Washington, DC 20006 (area 202 833-9680). Claims for missing issues from residents of the United States, Canada, and Mexico must be submitted within 3 months after publication of the issues; residents of all other countries must submit claims within 6 months of publication of the issues. Claims for issues missing because of failure to report an address change or for issues "missing from files" will not be allowed. Second-class postage paid at Washington, DC 20006, and at additional mailing offices. POSTMASTER: Send address changes to Antimicrobial Agents and Chemotherapy, ASM, 1913 I St., NW, Washington, DC 20006. Made in the United States of America. B $': ( l'l1t. Copyright C 1983, American Society for Microbiology. 1uflt-5 &' ,J All Rights Reserved. The code at the top of the first page of an article in this journal indicates the copyright owner's consent that copies of the article may be made for personal use or for personal use of specific clients. This consent is given on the condition, however, that the copier pay the stated per-copy fee through the Copyright Clearance Center, Inc., 21 Congress St., Salem, MA 01970, for copying beyond that permitted by Sections 107 and 108 of the U.S. Copyright Law. This consent does not extend to other kinds of copying, such as copying for general distribution, for advertising or promotional purposes, for creating new collective works, or for resale. Author Index Alexander, Donald P., 59 Aronoff, George R., 74 Jhala, H. I., 54 Jonsson, Monica, 15 Baker, W. L., 26 Banker, D. D., 54 Bansal, Madhu B., 166 Baselski, Vickie S., 161 Brier, Michael E., 74 Brodeur, James P., 108 Kawabata, Tomoji, 8 Kelley, Eileen, 113 Kitaura, Kozo, 105 Klastersky, Jean, 36 Kuroda, Kyoichi, 31 Kusajima, Hisao, 1 Chang, Daniel S., 67 Cherubin, Charles E., 42 Chippendale, Gwynn R., 188 Chopra, I., 175 Cimarusti, Christopher M., 98 Cohen, Sidney, 151 Connor, Edward, 182 Coppens, Lyne, 36 Crowley, John J., 169 Curvey, Ron, 19 Latif, Razia, 46 Lietman, Paul S., 133 Linner, E. C., 142 Lowy, Franklin D., 67 Luft, Friedrich C., 74 Dajani, Adnan S., 46 Davis, Robert E., 22 Edson, Randall S., 179 Farber, Bruce F., 138 Fasching, Claudine E., 49 Feingold, David S., 185 Fineberg, Naomi S., 74 Fohrman, Daniel E., 59 Gadebusch, Hans H., 86 Georgopapadakou, Nafsika H., 98 Gerding, Dale N., 49 Glant, Michael D., 74 Glogowski, Walter, 182 Goldstein, Ellie J. C., 42 Gootz, Thomas D., 91 Hansen, Vicky R., 161 Hanson, Bernard, 36 Hermans, Paul E., 179 Hirano, Shoji, 31 Ikeda, Akiyoshi, 31 Irikura, Tsutomu, 1 Isayama, Yasuro, 163 Jenkin, Howard M., 119 Maack, Richard W., 188 Malewicz, Barbara, 119 McDonnell, Richard W., 151 McGuffin, Robert W., 169 McKinstry, Doris N., 125 Meeker, Timothy C., 169 Minagawa, Harushige, 105 Mitani, Kenji, 163 Miyahara, Tadashi, 8 Moellering, Robert C., Jr., 138 Momsen, Maureen, 119 Motoi, Isamu, 31 Nakamizo, Nobuhiro, 105 Nakamura, Masuhisa, 8 Nakazawa, Muneo, 163 Neu, Harold C., 63 Neuhaus, Ellen G., 67 Norrby, S. Ragnar, 15 Schoenknecht, F. D., 142 Sekizaki, Tsutomu, 163 Selepak, Sally T., 172 Sherris, J. C., 142 Shimada, Jingoro, 1, 8 Shimamura, Masayoshi, 31 Shiota, Faith M., 169 Shoda, Ryochu, 31 Shulman, Michael, 42 Shungu, Daniel L., 86 Siegel, Martin S., 169 Smalley, David L., 161 Smith, Craig R., 133 Smith, M. C. M., 175 Smith, Sandra A., 98 Spector, Stephen A., 113 Steadham, Joe, 19 Steigbigel, Neal H., 67 Sud, Inder Jit, 185 Sugata, Toshiaki, 31 Sugeno, Kooichi, 8 Sugerman, A. Arthur, 125 Sugimoto, Chihiro, 163 Swabb, Edward A., 125 Sweeney, Helen M., 151 Sykes, Richard B., 98 Taylor, P. C., 142 Tenney, James H., 188 Terakado, Nobuyuki, 163 Thadepalli, Haragopal, 166 Tokunaga, Shuji, 31 Tyndall, Michael, 113 Uchida, Hiroshi, 1 Ueda, Yasushi, 1, 8 Ohkawa, Mitsuo, 31 Okasho, Akira, 31 Van Etta, Linda L., 49 Vance, Paula H., 19 Peterson, Lance R., 49 Polak, Annemarie, 79 Pottratz, Scott T., 74 Waldorf, Alayn R., 79 Walker, Naomi E., 74 Wallace, Richard J., Jr., 19 Washington, John A., II, 179 Weinberg, Ellen, 86 Whitmore, Susan C., 22 Wiss, Karen, 19 Witebsky, Frank G., 172 Rangnekar, V. M., 54 Rissler, Jane F., 22 Rothstein, Gerald, 59 Russo, Mary E., 59 Sanders, Christine C., 91 Sawaki, Masaru, 31 Scheld, W. Michael, 108 Yamaji, Takehisa, 1, 8 Yogev, Ram, 182 Yoshida, Tadashi, 8 Yu, Pauline K. W., 179 ANTIMICROBIAL AGENTS AND CHEMOTHERAPY, Jan. 1983 ANTIMICROBIAL AGENTS AND CHEMOTHERAPY INSTRUCTIONS TO AUTHORS script has been received by the Publications Office. Such a request, which should be accompanied by a copy of the Acknowledgments section of the paper, will in no way affect review of the manuscript. HOW TO SUBMIT MANUSCRIPTS Submit manuscripts directly to the ASM Publications Office, 1913 I St., NW, Washington, DC 20006. Since all submissions must be processed through this office, alternate routings, such as to a member of the Board of Editors, will delay initiation of the review process. The manuscript should be accompanied by a covering letter stating the following: the journal to which the manuscript is being submitted; the most appropriate section of the journal; the address and telephone number of the corresponding author, and the former ASM manuscript number and year if it is a resubmission. In addition, indicate whether permission to cite personal communications and receipt of preprints has been granted. Submit two complete copies of each manuscript, including figures and tables. The manuscript may be either the original typescript or clear, clean copies. Type every portion of the manuscript double space, including figure legends, table footnotes, and Literature Cited, and number all pages in sequence, including the abstract, tables, and figure legends. The use of paper with numbered lines is recommended. Submit figures as glossy or mat-finish photographs (see p. iv for detailed instructions). Authors who are unsure of proper English usage should have their manuscripts checked by someone proficient in the English language. Manuscripts may be rejected on the basis of poor English or lack of conformity to accepted standards of style. EDITORIAL POLICY Manuscripts submitted to Antimicrobial Agents and Chemotherapy (AAC) must represent reports of original research that have not been published previously and are not being considered for publication elsewhere. Page Charges It is anticipated that page charges, currently $30 per printed page (price subject to change), will be paid by all authors who have funds available from their institution or from the sponsor of the research. A bill for page charges will be sent with the galley proofs and reprint order form. If funds for payment of page charges are not available, a request to waive the charges must be sent to Walter G. Peter III, Director, Publications, American Society for Microbiology, 1913 I St., NW, Washington, DC 20006, immediately after receipt of the letter stating that the manu- Copyright To maintain and protect the Society's ownership and rights and to be able to protect the original authors from misappropriation of their published work, ASM requires authors to sign a copyright transfer agreement. This agreement is sent to the submitting author when the manuscript is accepted for publication. Unle this agreemet is executed, ASM will not publish the manuscript. (U.S. government enrployees may file a statement attesting that a manuscript was prepared as part of their official duties. If they elect to do so, they should not sign the ASM copyright transfer agreement.) Scope AAC is an interdisciplinary journal devoted to the dissemination of knowledge relating to all aspects of antimicrobial, antiparasitic, and anticancer agents and chemotherapy. Within the circumscriptions set forth below, any report involving studies on or with antimicrobial, antiparasitic, or anticancer agents is within the purview of AAC. ASM publishes a number of different journals covering various aspects of the field of microbiology. Each journal has a prescribed scope that must be considered in determining the most appropriate journal for each manuscript. If a given manuscript is appropriate for more than one ASM journal, the author's wishes will be given primary consideration. However, the editors reserve the option of transferring a manuscript to another ASM journal when it is apparent that the manuscript falls within the province of that journal. In such instances, authors are notified df this action by the editor or by the ASM Publications Office. Some of the guidelines determining transfer to other ASM journals are as follows. (i) Papers which describe the use of antimicrobial or anticancer agents as tools for elucidating the basic biological processes of microorganisms are considered appropriate for the Journal of Bacteriology. (ii) Manuscripts that: (a) describe the use of antimicrobial, antiparasitic, or anticancer agents as tools in the isolation, identification, or epidemiology of microorganisms associated with disease; (b) are concerned with quality control i INSTRUCTIONS TO AUTHORS procedures for diffusion, elution, or dilution tests for determining susceptibilities to antimicrobial agents in the clinical laboratory; and (c) deal with applications of commercially prepared tests or kits to assays performed in the clinical laboratory to measure the activities of established antimicrobial agents or their concentrations in body fluids will be considered appropriate for the Journal of Clinical Microbiology. Manuscripts concerned with development or modification of assay methods and validation of their sensitivity and specificity will be considered for publication by Antimicrobial Agents and Chemotherapy. (iii) Manuscripts describing new or novel methods or improvements in media and culture conditions will not be considered by AAC unless these are applied to the study of problems related to production or activity of antimicrobial agents. Such manuscripts are more appropriate for Applied and Environmental Microbiology or for the Journal of Clinical Microbiology. (iv) Papers that include extensive taxonomic material (e.g., descriptions of new taxa) should be submitted to the International Journal of Systematic Bacteriology (IJSB), which is published by ASM for the International Union of Microbiological Societies. If the main thrust of the manuscript is not taxonomy, the manuscript should be divided, and the taxonomic portion should be submitted to IJSB. If such division would weaken the main thrust, submit the manuscript to the journal of choice. If you have questions about these guidelines, please contact the editor-in-chief of the journal you are considering. Note that a manuscript rejected by one ASM journal on scientific grounds or on the basis of its general suitability for publication is considered rejected by all other ASM journals. * . given a manuscript control number and is assigned to one of the editors. The author is notified of this number and the editor to whom the manuscript is assigned. The reviewers operate under strict guidelines set forth in "Guidelines for Reviewers" and are expected to complete their reviews within 3 weeks after receipt of the manuscript. Authors are notified, generally within 8 weeks after submission, as to acceptance, rejection, or need for modification. When a manuscript is returned to the author for modification, it must be returned to the editor within 2 months; otherwise it may be considered withdrawn. When an editor has decided that a manuscript is acceptable for publication, the manuscript and a signed letter of acceptance are sent to the ASM Publications Office. The month of publication, approximate galley date, and section are added to the acceptance letter, which is then mailed to the author. The editorial staff of the ASM Publications Office completes the editing of the manuscript to bring it into conformity with prescribed style and English usage. Galley Proofs The printer sends the galley proof, copyedited manuscript, and page charge/reprint order form to the author. As soon as the galleys are corrected (within 48 h), they should be mailed to the ASM Publications Office. The galley proof stage is not the time to make extensive corrections, additions, or deletions. If new information has become available between acceptance and receipt of the galley proofs, and you feel that it is important to include this information, insert it as an "Addendum in Proof' with the permission of the editor. Limit other changes to correction of spelling errors, incorrect data, and serious grammatical errors. "In press" references for which page numbers Editorial Style have become available should be placed in the The editorial style of ASM journals conforms Literature Cited section as "a" numbers (e.g., to the CBE Style Manual (4th ed., 1978; CBE 12a). Do not renumber references. Questions regarding late galleys and problems Secretariat, 9650 Rockville Pike, Bethesda, Md.), Robert A. Day's How To Write and Pub- in the proof should be directed to the ASM lish a Scientific Paper (ISI Press, 1979), and Publications Office, telephone 202-833-9680. Scientific Writing for Graduate Students (CBE Secretariat), as interpreted and modified by the Reprints editors and the ASM Publications Office. The Reprints (in multiples of 100) may be pureditors and the Publications Office reserve the chased by contributors. An order form including privilege of editing manuscripts to conform with a table showing the cost of reprints is sent with the stylistic conventions set forth in the afore- each proof. said publications and in these instructions. The Review Process All manuscripts are subjected to critical review by the editors, by members of the Editorial Board, or by qualified outside reviewers. When a manuscript is submitted to the journal, it is ORGANIZATION AND FORMAT Regular Papers Regular full-length papers should include the elements described in this section. . . INSTRUCTIONS TO AUTHORS Title. Each manuscript should present the results of anindependent, cohesive study; thus, numbered series titles are not permitted. Exercise care in composing a title. Avoid the maintitle/subtitle arrangement. On the title page, include: title, running title (not to exceed 46 characters and spaces), full name (incuding first name and middle initial) of each author, address(es) of the institution(s) at which the work was performed, and each author's affiliation or a footnote indicating the present address of any author no longer at the institution where the work was performed. Place an asterisk after the name of the author to whom inquiries regarding the paper should be directed, and give that author's telephone number. microbial strains. When large numbers of microbial strains or mutants are used in a study, include strain tables identifying the sources and properties of the strains, mutants, bacteriophages, plasmids, etc. A method, strain, etc., used in only one of several experiments* reported in the paper should be described in the Results section or, if brief enough, may be included in a table footnote or figure legend. Materials and Methods. The Materials and Methods section should include sufficient technical information so that the experiments can be repeated. For commonly used materials and methods (e.g., commonly used media, protein determinations), a simple reference is sufficient. If several alternative methodologies are commonly employed, it is useful to identify the method briefly as well as to cite the reference. For example, it is preferable to state "cells were broken by ultrasonic treatment as previously described (9)" rather than "cells were broken as previously described (9)." You should allow the reader to assess the methodology without constant reference to previous publications. Describe new methods completely, and give sources of unusual chemicals, equipment, or Appendixes. Appendixes, which contain supplementary material to aid the reader, are permitted. Titles, authors, and Literature Cited sections that are distinct from those of the primary article are not allowed. If it is not feasible to list the author(s) of the appendix in the by-line or the Acknowledgment section of the primary article, rewrite the appendix so that it can be considered for publication as an independent article, either full length or Note style. Results. In the Results section, include the rationale or design of the experiments as well as the results; reserve extensive interpretation of the results for the Discussion section. Present the results as concisely as possible in one of the following: text, table(s), or figure(s). However, Diclaimers. If a statement disclaiming gov- avoid extensive use of graphs to present data ernmental or any other type of endorsement or that might be more concisely or more quantitaapproval is included, it will be deleted by the tively presented in the text or tables. Limit photographs (particularly photomicrographs and Publications Office. electron micrographs) to those that are absoluteAbstract. Limit the abstract to 250 words or ly necessary to demonstrate the experimental fewer, and concisely summarize the basic con- findings. Number figures and tables in the order tent of the paper without presenting extensive in which they are cited in the text, and be sure experimental details. Do not include abbrevia- that all figures and tables are cited. tions or diagrams. When it is essential to include Dscussion. The Discussion should provide an a reference, use the full literature citation but omit the article title. Because the abstract will be interpretation of the results in relation to previpublished separately by abstracting services, it ously published work and to the experimental must be complete and understandable without system at hand and should not contain extensive repetition of the Results section or reiteration of reference to the text. the introduction. In short papers, the Results Introduction. The introduction should supply and Discussion sections may be combined. sufficient background information to allow the Acknowledgments. Acknowledgments for fireader to understand and evaluate the results of the present study without referring to previous nancial assistance and for personal assistance publications on the topic. The introduction are given in two separate paragraphs. The usual should also provide the rationale for the study. format for acknowledgment of grant support is References should be chosen carefully to pro- as follows: "This work was supported in part by vide the most salient background rather than an Public Health Service grant CA-01234 from the National Cancer Institute." exhaustive review of the topic. Literature Cited. Arrange the Literature Cited section in alphabetical order, by first author, and number consecutively. (Abbreviate journal names according to the Bibliographic Guide for Editors & Authors, American Chemical Society, 1974, or Serial Sources for the BIOSIS Data INSTRUCTIONS TO AUTHORS Base, BioSciences Information Service, 1981.) Cite each listed reference by number in the text. The following types of references are not valid for listing: unpublished data, personal communications, manuscripts in preparation, manuscripts submitted, "in press" references, pamphlets, abstracts, patents, theses, dissertations, and material that has not been subjected to peer review. References to such sources should be made parenthetically in the text. An "in press" reference to an ASM publication should state the control number (e.g., AAC 576) or the name of the publication, if it is a book. Follow the styles shown in the examples below. 1. Andrews, F. A., W. H. Beggs, and G. A. Sarosi. 2. 3. 4. 5. 6. 7. 1977. Influence of antioxidants on the bioactivity of amphotericin B. Antimicrob. Agents Chemother. 11:615-619. Berry, L. J., R. N. Moore, K. J. Goodrum, and R. E. Couch, Jr. 1977. Cellular requirements for enzyme inhibition by endotoxin in mice, p. 321325. In D. Schlessinger (ed.), Microbiology-1977. American Society for Microbiology, Washington, D.C. Finegold, S. M., W. E. Shepherd, and E. H. Spaulding. 1977. Cumitech 5, Practical anaerobic bacteriology. Coordinating ed., W. E. Shepherd. American Society for Microbiology, Washington, D.C. Gill, T. J., m. 1976. Principles of radioimmunoassay, p. 169-171. In N. R. Rose and H. Friedman (ed.), Manual of clinical immunology. American Society for Microbiology, Washington, D.C. Leadbetter, E. R. 1974. Order II. Cytophagales nomen novum, p. 99. In R. E. Buchanan and N. E. Gibbons (ed.), Bergey's manual of determinative bacteriology, 8th ed. The Williams & Wilkins Co., Baltimore. Sacks, L. E. 1972. Influence of intra- and extracellular cations on the germination of bacterial spores, p. 437-442. In H. 0. Halvorson, R. Hanson, and L. L. Campbell (ed.), Spores V. American Society for Microbiology, Washington, D.C. Winshell, E. B., C. Cherubin, J. Winter, and H. C. Neu. 1970. Antibiotic resistance of Salmonella in the eastern United States, p. 86-89. Antimicrob. Agents Chemother. 1969. Parenthetical references in the text should be cited as follows: ... and protects the organisms against oxygen toxicity (H. P. Misra and I. Fridovich, Fed. Proc. 35:1686, 1976). ... system was used (W. E. Scowcroft, A. H. Gibson, and J. D. Pagan, Biochem. Biophys. Res. Commun., in press). ... linkage group XIV (R. D. Smyth, Ph.D. thesis, University of California, Los Angeles, 1972). ... in poly mitochondria (S. E. Mainzer and C. W. Slayman, Abstr. Annu. Meet. Am. Soc. Microbiol. 1976, K15, p. 139). IV Notes Submit Notes in the same way as full-length papers. They receive the same review, and they are neither published more rapidly than fulllength papers nor considered preliminary communications. The Note format is intended for the presentation of brief observations that do not warrant full-length papers. Each Note must have an abstract of no more than 50 words. Do not use section headings in the body of the Note; report methods, results, and discussion in a single section. The text is not to exceed 1,000 words, and the number of figures and tables should be kept to a minimum. Present acknowledgments as in full-length papers, but do not use a heading. The Literature Cited section is identical to that of full-length papers. ILLUSTRATIONS AND TABLES Photographs When submitting electron micrographs, photographs of polyacrylamide gels, etc., keep in mind the journal page size: 6.5 cm for a single column and 14 cm for a double column (maximum). Include only the significant portion of the illustration. Each must be of sufficient contrast to withstand the inevitable loss of contrast and detail inherent in the printing process. Electron and light micrographs must be first-generation copies of the original negatives. Indicate the magnification of each photomicrograph with a scale marker on the micrograph. Do not mount photographs on heavy cardboard. Composite figures may be mounted on bond paper or on lightweight, flexible cardboard. A complete set of photographs, not photocopies, must accompany each copy of the manuscript. Drawings Submit graphs, charts, diagrams, and other drawings as photographs made from finished drawings not requiring additional artwork or typesetting. No part of the graph or drawings should be typewritten. Use a lettering set or other professional-quality device for all labeling. Most graphs will be reduced to one-column width (6.5 cm), and all elements in the drawing should be prepared to withstand this reduction. Avoid very heavy letters, which tend to close up when reduced, and avoid unusual symbols which the printer may not be able to reproduce in the legend. Symbols and lettering should be of appropriate size; do not use large letters and small symbols or vice versa. Direct readouts from computers, recorders, etc., are not usually acceptable; such materials should be redrawn. In figure ordinate and abscissa scales (as well as table column headings), avoid ambiguous use v INSTRUCTIONS TO AUTHORS of numbers with exponents. Usually, it is preferable to use the International System of Units (ii for 10-6, m for 1i-0, k for 103, M for 106, etc.). A complete listing of SI symbols can be found in the International Union of Pure and Applied Chemistry (IUPAC) "Manual of Symbols and Terminology for Physicochemical Quantities and Units" (Pure Appl. Chem. 21:3-44, 1970). Thus, a representation of 20,000 cpm on a figure ordinate should be tnade by the number 20, accompanied by the label kcpm. When powers of 10 must be employed, the editorial style of the journal follows the CBE Style Manual recommendation, which differs from the conventions used by several other journals. The CBE Style Manual suggests that the exponent power be associated with the number shown. In representing 2 x 107 cells per ml, the correct designation would be 2, labeled as "107 cells per ml." Likewise, an enzyme activity of 0.06 U/ml would be shown as 6, accompanied by the label "10-2 U/ml." The preferred designation would be "60 mU/ml" (milliunits per ml). Figure Legends Figure legends may be placed beneath the photocopy of a drawing for the convenience of reviewers. (In addition, however, a complete set of photographs or drawings, with legends on separate pages, must accompany each copy of the manuscript.) Legends should provide enough information so that the figure is understandable without frequent reference to the text. However, do not repeat experimental methods in the legend. Define all symbols and abbreviations used in the figure. Common abbreviations and others used frequently in preceding text need not be redefined in the legend. Tables Type each table on a separate page. Arrange the data so that columns of like material read down, not across. The headings should be sufficiently clear so that the meaning of the data will be understandable without reference to the text. See the Abbreviations section of these instructions for those that may be used in tables. Explanatory footnotes are acceptable, but more extensive table "legends" are not. Footnotes should not include detailed descriptions of the experiment. Table 1 is an example of a wellconstructed table. Tables (or graphs) presenting "raw" drug susceptibility data should be avoided. To achieve clarity of exposition and conserve space, such data should be analyzed by the author and presented preferably in tabular form. TABLE 1. Distribution of protein and ATPase in fractions of dialyzed membranesa ATPase Membranes from: Control El treated Frction /go ToaU protein Total U Depleted 0.036 2.3 membrane Concentrated supernatant 0.134 4.82 Depleted membrane 0.034 1.98 Concentrated supernatant 0.11 4.6 a Specific activities of ATPase of nondepleted membranes from control and treated bacteria were 0.21 and 0.20, respectively. Camera-Ready Copy Drawings, tables, chemical formulas, etc., that can be photographically reproduced for publication without further typesetting or artwork are referred to as "camera ready." Camera-ready copy must be carefufly prepared to conform with the style of AAC. It should not be hand lettered. The advantages of submitting camera copy are that no second proofreading is necessary and the material will appear exactly as envisioned by the author. This is particularly advantageous when there are long, complicated tables and when the spacing and division of material are important. NOMENCLATURE Chemical and Biochemical Nomenclature The recognized authority for the names of chemical compounds is Chemical Abstracts (Chemical Abstracts Service, Ohio State University, Columbus) and its indexes. For guidelines to the use of biochemical terminology, consult the following: International Union of Biochemistry Biochemical Nomenclature and Related Documents, 1978, reprinted for The Biochemical Society, London, England; the instructions to authors of the Journal ofBiological Chemistry and Archives of Biochemistry and Biophysics (first issues of each year); and the Handbook of Biochemistry and Molecular Biology (G. D. Fasman, ed., 3rd ed., 1976, CRC Press, Inc.). Molecular weights should not be expresssed in daltons; molecular weight is a unitless ratio. Molecular mass is expressed in daltons. For enzymes, use the recommended (trivial) name as assigned by the Nomenclature Committee of the International Union of Biochemistry INSTRUCTIONS TO AUTHORS as described in Enzyme Nomenclature 1978 (Academic Press, Inc., 1979). If a nonrecommended name is used, place the proper (trivial) name in parentheses at first use in the abstract and text. Use the EC number when it has been assigned, and express enzyme activity either in katals (preferred) or in the older system of "pLmol min." Nomenclature of Microorganisms In general, the nomenclature of bacteria should follow that presented in Bergey's Manual of Determinative Bacteriology (8th ed., The Williams & Wilkins Co., 1974). Only those names which were included in the "Approved Lists of Bacterial Names" (Int. J. Syst. Bacteriol. 30:225-420, 1980) and those which have been validly published in the International Journal of Systematic Bacteriology since 1 January 1980 have standing in nomenclature. If there is reason to use a name that does not have standing in nomenclature, the name should be enclosed in quotation marks, and an appropriate statement concerning the nomenclatural status of the name should be made in the text (for an example, see Int. J. Syst. Bacteriol. 30:547-556, 1980). Binary names consisting of a generic name and a specific epithet (e.g., Escherichia coli) must be used for all microorganisms. Names of higher categories may be used alone, but a specific epithet must be preceded by a generic name the first time it is used in a paper. Thereafter, the generic name should be abbreviated to the initial capital letter (e.g., E. coli), provided there can be no confusion with other genera used in the paper. Names of all taxa (phyla [for fungi, divisions], classes, orders, families, genera, species, subspecies) are printed in italics; strain designations and numbers are not. Since the classification of fungi is far from complete, it is the responsibility of the author to determine the currently accepted binomial for a given yeast or mold. Some sources for the spelling of these names include The Yeasts (J. Lodder, ed., North-Holland Publishing Co., 1970) and Ainsworth and Bisby's Dictionary of the Fungi, Including the Lichens, 6th ed. (Com- monwealth Mycological Institute, Kew, Surrey, England, 1971). Names used for viruses should be those approved by the International Committee on Taxonomy of Viruses (ICTV) and published in the 3rd Report of the ICTV Classification and Nomenclature of Viruses, Intervirology, vol. 12, no. 3-5, 1979. If desired, synonyms may be added parenthetically when the name is first mentioned. Approved generic (or group) and family names may also be used. Microorganisms, viruses, and plasmids should be given designations consisting of letters and Vi serial numbers. It is generally advisable to include a worker's initials or a descriptive symbol of locale, laboratory, etc., in the designation. Each new strain, mutant, isolate, or derivative should be given a new (serial) designation. Such a designation should be distinct from those of the genotype and phenotype, and genotypic and phenotypic symbols should not be included. A registry of plasmid designations is maintained by the Plasmid Reference Center, Department of Medical Microbiology, Stanford University, Stanford, CA 94305. Genetic Nomenclature Bacteria. The genetic properties of bacteria are described in terms of phenotypes and genotypes. The phenotype designation describes the observable properties of an organism. The genotype refers to the genetic constitution of an organism, usually in reference to some standard wild type. Use the recommendations of Demerec et al. (Genetics 54:61-74, 1966) as a guide in employing these terms. (i) Phenotype designations must be employed when mutant loci have not been identified or mapped. Phenotype designations generally consist of three-letter symbols; these are not italicized and the first letter of the symbol is capitalized. It is preferable to use roman or arabic numerals (instead of letters) to identify a series of related phenotypes. Thus, a series of bacteriocin-tolerant mutants might be designated Toll, TolIl, Tollll, etc., or a series of nucleic acid polymerase mutants might be designated Poll, Pol2, Pol3, etc. Wild-type characteristics can be designated as Tol+ or Pol+ and, when necessary for clarity, negative superscripts (Tol- Pol-) can be used to designate mutant characteristics. Superscript letters may be used to further delineate phenotypes (e.g., Strr for streptomycin susceptibility). Phenotype designations should be defined. (ii) Genotype designations are similarly indicated by three-letter locus symbols. In contrast to phenotype designations, these are lowercase italic (e.g., ara his rps). If several loci govern related functions, these are distinguished by italicized capital letters following the locus symbol (e.g., araA araB araC). Promoter, terminator, and operator sites should be indicated as described by Bachmann and Low (Microbiol. Rev. 44:1-56, 1980): e.g., lac2p, lacAt, and lac2o. (iii) Wild-type alleles are indicated with a superscript plus (ara+ his'). Where the genotype of an organism is being specified (e.g., in a strain table), a superscript minus is not used to indicate a mutant locus. Elsewhere, a superscript minus may be used to distinguish between the symbol of a mutant allele and that of a vui INSTRUCTIONS TO AUTHORS genetic locus. However, this distinction is best made in the context, and thus one refers to an ara mutant rather than an ara- strain. (iv) Mutation sites are designated by placing serial isolation numbers (allele numbers) after the locus symbol (e.g., araAl araA2). If only a single such locus exists or if it is not known in which of several related loci the mutation has occurred, a hyphen is used instead of the capital letter (e.g., ara-23). It is essential in papers reporting the isolation of new mutants that allele numbers be given to the mutations. For Escherichia coli, there is a registry of such numbers: E. coli Genetic Stock Center, Department of Human Genetics, Yale University School of Medicine, P.O. Box 3333, New Haven, CT 06510. For Salmonella, the registry is: Salmonella Genetic Stock Center, Department of Biology, University of Calgary, Calgary, Alberta, Canada T2N 1N4. (v) The use of superscripts with genotypes (other than + to indicate wild-type alleles) should be avoided. Designations indicating amber mutations, temperature-sensitive mutations, and indications of phenotype should follow the allele number [e.g., araA230(Am) hisD21(Ts)]. (vi) Deletions are indicated by the symbol A placed before the deleted gene or region, e.g., AtrpA432, A(aroP-aceE)419, or Ahis(dhuA hisJ hisQ)1256. Similarly, other symbols can be used (with appropriate definition). Thus, a fusion of the ara and lac operons can be shown as 4(aralac)95. Similarly, 4'(araB'-lacZ+)96 indicates that the fusion results in a truncated araB gene fused to an intact lacZ, and 4'(malElacZ)97(Hyb) shows that a hybrid protein is synthesized. An inversion is shown as IN(rrnDrrnE)1. An insertion of an E. coli his gene into plasmid pSC101 at zero kilobases (0 kb) is shown as pSC101 Ql(Okb::K-12hisB)4. An alternative designation of an insertion can be used in simple cases, e.g., galT236::TnS. The number 236 refers to the locus of the insertion and, if the strain carries an additional gal mutation, it is listed separately. Additional examples, which utilize a slightly different format, are to be found in the papers by Campbell et al. and Novick et al., cited below. It is important in reporting construction of strains in which a mobile element was inserted and subsequently deleted that this last fact be noted in the strain table. This can be done by listing the genotype of the strain used as an intermediate, in a table footnote, or by a direct or parenthetical remark in the genotype, e.g., (F-), AMu cts, mal::AMu cts::lac. In setting of parenthetical remarks within the genotype or dividing the genotype into constituent elements, parentheses and square brackets are used without special meaning; square brackets are used outside parentheses. To indicate the presence of an episome, parentheses (or brackets) are used (X, F+). Reference to an integrated episome is indicated as described above for inserted elements, and an exogenote is shown as, for example, W3110/F'8(gal'). Any deviations from standard genetic nomenclature should be defined in Materials and Methods or in a table of strains. For more detailed information about genetic maps of locus symbols in current use, consult reviews by Bachmann and Low (Microbiol. Rev. 44:1-56, 1980) for E. coli K-12, Sanderson and Hartmn (Microbiol. Rev. 42:471-519, 1978) for Salmonella typhimurium, Holloway et al. (Microbiol. Rev. 43:73-102, 1979) for Pseudomonas, and Henner and Hoch (Microbiol. Rev. 44:57-82, 1980) for Bacillus subtilis. For yeasts, Chlamydomonas, and several fungal species, symbols such as those given in the Handbook of Microbiology (A. I. Laskin and H. A. Lechevalier, ed., CRC Press, Inc., 1974) should be employed. "Mutant" vs. "mutation." Keep in mind the distinction between a mutation (an alteration of the primary sequence of the genetic material) and a mutant (a strain carrying one or more mutations). One may speak about the mapping of a mutation, but one cannot map a mutant. Likewise, a mutant has no genetic locus-only a phenotype. Strain desi os. Avoid the use of a genotype as a name (e.g., ". . . subsequent use of leuC6 for transduction . . ."). If a strain designation has not been chosen, select an appropriate word combination (e.g., ". . . either strain PA3092 or another strain containing the leuC6 mutation . . ."). Viruses. The rules for genetic nomenclature of viruses (bacteriophages) differ from those for bacteria. In most instances, viruses have no phenotype, since they have no metabolism outside host cells. Therefore, distinctions between phenotype and genotype cannot be made. Superscripts are employed to indicate hybrid genomes. Genetic symbols may be one, two, or three letters. For example, a mutant strain of A might be designated as A Aamll int2 redll4 c1857; this strain carries mutations in genes cI, int, and red and an amber-suppressible (am) mutation in gene A. A strain designated X att434 imm21 would represent a hybrid of phage A which carries the immunity region (imm) of phage 21 and the attachment (att) region of phage 434. Host DNA insertions into viruses should be delineated by square brackets, and the genetic symbols and designations for such inserted DNA should conform to those employed for the host genome. Genetic symbols for phage can be found in Szybalski and Szybalski (Gene INSTRUCTIONS TO AUTHORS 7:217-270, 1979) and in Echols and Murialdo (Microbiol. Rev. 42:577-591, 1978). Transposable elements, plasmids, and restriction enzymes. Nomenclature of transposable elements (insertion sequences, transposons, phage Mu, etc.) should follow the recommendations of Campbell et al. (Gene 5:197-206, 1979), with the modifications given in section vi. The system of designating transposon insertions at sites where there are no known loci, e.g., zef-123::TnS, has been described by Chumley et al. (Genetics 91:639-655, 1979). The nomenclature recommendations of Novick et al. (Bacteriol. Rev. 40:168-189, 1976) for plasmids and plasmidspecified activities, of Low (Bacteriol. Rev., 36:587-607, 1972) for F-prime factors, and of Roberts (Nucleic Acids Res. 9:r75-r96, 1981) for restriction enzymes and DNA fragments derived from treatment with these enzymes should be used whenever possible. Recombinant DNA molecules, constructed in vitro, follow the nomenclature for insertions in general. DNA inserted into recombinant DNA molecules should be described by using the gene symbols and conventions for the organism from which the DNA was obtained. Abbreviations It is strongly recommended that all abbreviations except those listed below be introduced in the first paragraph in Materials and Methods. Alternatively, define each abbreviation and introduce it in parentheses the first time it is used; e.g., "cultures were grown in Eagle minimal essential medium (MEM)." Generally, eliminate abbreviations that are not used at least five times in the text (including tables and figure legends). Abbreviations should be used primarily as an aid to the reader, rather than as a convenience to the author, and therefore their use should be limited. Abbreviations other than those recommended by the IUPAC-IUB (Biochemical Nomenclature and Related Documents, 1978) should be used only when a case can be made for necessity, such as in tables and figures. It is often possible to use pronouns or to paraphrase a long word after its first use (e.g., "the drug," "the substrate"). Standard chemical symbols, numerical multiples (e.g., Me2SO for dimethyl sulfoxide), and trivial names or their symbols (folate, Ala, Leu, etc.) may be used for terms that appear in full in the neighboring text. In addition to abbreviations for standard units of measurement and chemical symbols of the elements, the following should be used without definition in the title, abstract, text, figure legends, and tables: DNA (deoxyribonucleic acid); cDNA (complementary DNA); RNA (ribonucle- . .i. ic acid); RNase (ribonuclease); DNase (deoxyribonuclease); rRNA (ribosomal RNA); mRNA (messenger RNA); tRNA (transfer RNA); AMP, ADP, ATP, dAMP, GTP, etc. (for the respective 5' phosphates of adenosine or other nucleosides); 2'-AMP, 3'-AMP, and 5'-AMP (the 2'-, 3'-, and 5'-, when needed for contrast, phosphates of the nucleosides); NAD+ (nicotinamide adenine dinucleotide, oxidized); NADH (nicotinamide adenine dinucleotide, reduced); NADP (nicotinamide adenine dinucleotide phosphate); NADPH (nicotinamide adenine dinucleotide phosphate, reduced); Pi (orthophosphate); PP, (pyrophosphate); UV (ultraviolet); PFU (plaque-forming units); CFU (colony-forming units); Tris [tris(hydroxymethyl)aminomethane]; DEAE (diethylaminoethyl); and EDTA (ethylenediaminetetraacetate). Abbreviations for cell lines (e.g., HeLa cells) also need not be defined. The following abbreviations should be used without definition in tables: amt (amount) approx (approximately) avg (average) concn (concentration) diam (diameter) expt (experiment) ht (height) mo (month) mol wt (molecular weight) no. (number) prepn (preparation) SD (standard deviation) SE (standard error) SEM (standard error of the mean) sp act (specific activity) sp gr (specific gravity) temp (temperature) tr (trace) vol (volume) vs (versus) wk (week) wt (weight) yr (year) Drugs and Pharmaceutical Agents The use of "nonstandard" abbreviations to designate names of antibiotics and other pharmaceutical agents generally will not be accepted, because the use of different abbreviations for a single agent has often caused confusion. If, on occasion, a nonstandardized abbreviation for a drug or pharmaceutical substance is used, it will be accepted under the following conditions: (i) it must be defined in the abbreviation paragraph in Materials and Methods or at the first use in the text; (ii) it must be clear and unambiguous in meaning; and (iii) it must contribute to ease of assimilation by readers. Whenever possible, use generic names of drugs; the use of trade names is not permitted. Sensitivity and Susceptibility to Drugs Keep in mind the distinction between sensitivity and susceptibility. Sensitivity is the result of an enzymatic reaction within the cell that makes the organism susceptible to a drug. Thus, sensitivity refers to the effects of drugs on enzymes, whereas susceptibility refers to the reaction of an organism to a drug. LS INSTRUCTIONS TO AUTHORS Verb Tense Use the past tense in referring to results recorded in the present paper. Use the present tense in discussing previously established findings and generally accepted phenomena. Reptng Numerical Data Standard metric units are used for reporting length, weight, and volume. For these units and for molarity, use the prefixes m, >, n, and p (10-3, 10-6, 10-9, and 10-12, respectively). Likewise, use the prefix k (for 103). Avoid compound prefixes such as m, or ptx. Use ,g/ ml or pg/g in place of the ambiguous ppm. Units of temperature are presented as follows: 37°C or 324 K. When fractions are used to express units such as enzymatic activities, it is preferable to use whole units, such as g or min, in the denominator instead of fractional or multiple units such as ,g or 10 min. For example, "pmol/min" would be preferable to "pmolV10 min," and "p,mol/g" would be preferable to "nmoll,ug." It is also preferable that an unambiguous form such as the exponential notation be used in place of multiple slashes; for example, ">mol g-1 min-" is preferable to ",mol/g per min." See the CBE Style Manual, 4th edition, for more detailed information regarding the report- ing of numbers. Also contained in this source is information on the appropriate SI units to be used for the reporting of illumination, energy, frequency, pressure, and other physical terms. Isotopically Labeled Compounds For simple molecules, the labelin is indicated in the chemical formula (e.g., C02, 'H20, H235S04). Brackets are not employed when the isotopic symbol is attached to a word that is not a specific chemical name (e.g., 1311-labeled protein, 14C-amino acids, 3H-ligands, etc.). For specific chemicals, the symbol for the isotope introduced is placed in square brackets directly preceding the part of the name that describes the labeled entity. Note that configuration symbols and modifiers precede the isotopic symbol. The following examples illustrate correct usage: [14C]urea UDP-[U-14CJglucose L-[methyl-'4C]methionine [2,3-3Hlserine [a-'4C]Iysine [y-_32PJATP E. coli [32PJDNA fructose 1,6-f1-32P]diphosphate This journal follows the same conventions for isotopic labeling as the Journal of Biological Chemistry, and more detailed information can be found in the instructions to authors of that journal (first issue of each year). 1983 Full Membership Amenrcan Society for Microbiology 1913 I St., NW, Washingto, DC 20006 The Society welcomes to full membership any person who is interested in its objects, and who holds a ba s degree in mirobiology or a related field (or who has had taining and expeiene equivalent to that eeen e by a bachels degre). The minimum annual membership asesment is $50, which includes a general mebnership fee, ASM News, and $41 toward subsciptions to the Society's scientific joumals. 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