Abstract
Resistance to tetracycline (Tc), chloramphenicol (Cm), streptomycin (Sm), and sulfanilamide (Sa) was surveyed in clinical isolates of Escherichia coli and Shigella strains. Among the Sm Sa-resistant strains, the frequency of nonconjugative r (Sm Sa) plasmids was much higher than that of conjugative R plasmids encoding double resistance. The biochemical mechanism of Sm resistance mediated by the conjugative plasmids R(Tc Cm Sm Sa) and R(Cm Sm Sa) and about half the numbers of conjugative R(Tc Sm Sa) and R(Sm Sa) plasmids tested were found to be due to adenylylation of the drug. The remaining conjugative R(Tc Sm Sa) and R(Sm Sa) plasmids and all nonconjugative (Sm Sa) plasmids tested inactivated Sm by phosphorylation.
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Selected References
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- Benveniste R., Yamada T., Davies J. Enzymatic Adenylylation of Streptomycin and Spectinomycin by R-Factor-Resistant Escherichia coli. Infect Immun. 1970 Jan;1(1):109–119. doi: 10.1128/iai.1.1.109-119.1970. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Clowes R. C. Molecular structure of bacterial plasmids. Bacteriol Rev. 1972 Sep;36(3):361–405. doi: 10.1128/br.36.3.361-405.1972. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Cohen S. N., Chang A. C., Hsu L. Nonchromosomal antibiotic resistance in bacteria: genetic transformation of Escherichia coli by R-factor DNA. Proc Natl Acad Sci U S A. 1972 Aug;69(8):2110–2114. doi: 10.1073/pnas.69.8.2110. [DOI] [PMC free article] [PubMed] [Google Scholar]
- DAVIS B. D., MINGIOLI E. S. Mutants of Escherichia coli requiring methionine or vitamin B12. J Bacteriol. 1950 Jul;60(1):17–28. doi: 10.1128/jb.60.1.17-28.1950. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Kawabe H., Kondo S., Umezawa H., Mitsuhashi S. R factor-mediated aminoglycoside antibiotic resistance in Pseudomonas aeruginosa: a new aminoglycoside 6'-N-acetyltransferase. Antimicrob Agents Chemother. 1975 May;7(5):494–499. doi: 10.1128/aac.7.5.494. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Mitsuhashi S., Inoue K., Inoue M. Nonconjugative plasmids encoding sulfanilamide resistance. Antimicrob Agents Chemother. 1977 Sep;12(3):418–422. doi: 10.1128/aac.12.3.418. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Ozanne B., Benveniste R., Tipper D., Davies J. Aminoglycoside antibiotics: inactivation by phosphorylation in Escherichia coli carrying R factors. J Bacteriol. 1969 Nov;100(2):1144–1146. doi: 10.1128/jb.100.2.1144-1146.1969. [DOI] [PMC free article] [PubMed] [Google Scholar]