R-Plasmids in Salmonella Isolates from Sporadic Cases of Gastroenteritis

Five-hundred and twenty seven strains of Salmonella isolated from different patients admitted to hospitals in Rome from 1982 to 1985 were screened for their resistance to antimicrobial drugs. Sixty-one strains (11.6%) were found to be resistant to two or more antibiotics; the most frequent resistanc...

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Bibliographic Details
Published in:European journal of epidemiology 1988-09, Vol.4 (3), p.366-370
Main Authors: Filetici, E., Martini, A., Magni, L., Fantasia, M.
Format: Article
Language:English
Subjects:
Anti-Bacterial Agents - pharmacology
Antibiotics
Antimicrobials
Colicins - biosynthesis
Drug resistance
Drug Resistance, Microbial
Epidemics
Epidemiology
Escherichia coli - drug effects
Escherichia coli - genetics
F Factor - drug effects
Gastroenteritis
Gastroenteritis - microbiology
Humans
In Vitro Techniques
Molecular weight
Plasmids
R Factors - genetics
Salmonella
Salmonella - drug effects
Salmonella - genetics
Shigella
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Summary:Five-hundred and twenty seven strains of Salmonella isolated from different patients admitted to hospitals in Rome from 1982 to 1985 were screened for their resistance to antimicrobial drugs. Sixty-one strains (11.6%) were found to be resistant to two or more antibiotics; the most frequent resistances were to sulfathiazole, streptomycin, tetracycline, chlor-amphenicol and ampicillin. Of the thirty-eight strains showing resistance to three or more antibiotics, 17 were able to transfer their resistance to E. coli K 12. The isolates were heterogeneous in plasmid population: only few strains harbored a sole plasmid, most harbored many plasmids ranging between 20 and 120 megadaltons in weight. Most strains were found to carry a conjugative plasmid of incompatibility group Inc H of 100-120 megadaltons and Inc I α of 60-70 megadaltons.
ISSN:0393-2990
0392-2990
1573-7284
DOI:10.1007/BF00148926