Temperature Sensitive R Plasmids Isolated fromProteusStrains
نویسندگان
چکیده
منابع مشابه
Detection of an R factor showing temperature-sensitive transfer in Salmonella typhimurium isolated from calves.
An R factor carrying tetracycline resistance, the transfer of which was observed in mating cultures at 25 but not at 37 C, was demonstrated in strains of Salmonella typhimurium isolated from calves.
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A temperature-sensitive fi(-) R plasmid, pJY1, which confers resistance to chloramphenicol, streptomycin, and sulfonamide, was found in a drug-resistant strain of Vibrio cholerae (biotype El Tor) isolated in the Philippines in 1973. The R plasmid is temperature sensitive for transferability but not for stability in the hosts. pJY1 is stably maintained either in V. cholerae or in Escherichia col...
متن کاملStaphylococcal penicillinase plasmids: studies on the reversion of a temperature-sensitive replication mutant to temperature stability.
A culture of Staphylococcus aureus harbouring a temperature-sensitive plasmid carrying genes for resistance to penicillin and cadmium ions, loses this plasmid and the associated phenotype when grown at the restrictive temperature. However, incubation at the restrictive temperature in the presence of cadmium ions results in a small number of cadmium-resistant cells. The properties of these survi...
متن کاملMercury resistance and R plasmids in Escherichia coli isolated from clinical lesions in Japan.
The mercury and antibiotic resistance of 338 strains of Escherichia coli isolated from hospital patients was determined. Resistance to mercury was found in 58.6% of the isolates. The frequencies of resistance to streptomycin (Sm), tetracycline (Tc), chloramphenicol (Cm), kanamycin (Kan), cephaloridine (Cer), and gentamicin (Gm) were 66.3, 60.3, 56.5, 42.9, 32.1, and 1.5%, respectively. Among th...
متن کاملDrug resistance and R plasmids in Salmonella typhi isolated in Korea.
A total of 949 strains of Salmonella typhi isolated in Korea from 1968 to 1975 were tested for drug resistance and distribution of R plasmids. Resistance was mostly restricted to streptomycin (SM) and sulfisomidine (SA), singly or in combination, at a low degree. A small number of strains (1.5%) were resistant to four or more drugs: chloramphenicol (CM), tetracycline (TC), SM, SA, ampicillin (A...
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ژورنال
عنوان ژورنال: Microbiology and Immunology
سال: 1977
ISSN: 0385-5600
DOI: 10.1111/j.1348-0421.1977.tb00330.x