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PMID: 4599123 Published · ppublish English Journal Article

R factors in strains of Salmonella typhi and Shigella dysenteriae 1 isolated during epidemics in Mexico: classification by compatibility.

Antimicrobial agents and chemotherapy ·Vol. 5 ·No. 3 ·1974-03-00 ·Pages 310-7

Datta N, Olarte J

Abstract

All 17 Salmonella typhi strains tested from the epidemic in Mexico carried R factors of compatibility group H, conferring resistance to chloramphenicol, streptomycin, tetracycline, and sulfonamides. Some S. typhi strains carried, in addition, non-conjugative, ampicillin resistance plasmids and R factors of the I or A-C complex. All 20 Shigella dysenteriae 1 strains tested of epidemic origin carried O-group R factors. Ampicillin resistance in S. dysenteriae 1 was not proved to be plasmid borne. R factors of group H were not identified in any of the tested Mexican isolates other than S. typhi, but R factors of group O were identified in Escherichia coli, Shigella flexneri, and one strain of S. typhi, as well as in the epidemic S. dysenteriae. An R factor was identified which seemed to have two compatibility specificities, groups Iomega and O.

MeSH Terms
Disease Outbreaks Drug Resistance, Microbial Dysentery, Bacillary/epidemiology,microbiology Escherichia coli/drug effects Extrachromosomal Inheritance India Mexico Salmonella/drug effects Shigella dysenteriae/drug effects South Africa Typhoid Fever/epidemiology,microbiology
Authors & Affiliations
2 authors, click to expand affiliations / ORCID
Datta N
Olarte J
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32 references, click to expand
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Article Info
Journal
Antimicrobial agents and chemotherapy
Abbr.
Antimicrob Agents Chemother
ISSN
0066-4804
DOI
10.1128/AAC.5.3.310
Published
1974-03-00
Pages
310-7
Language
English
Region
United States
NLM ID
0315061
PMCID
PMC428966
Subset
IM
External Links
PubMed source DOI: 10.1128/AAC.5.3.310 PMC Full Text View journal details
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