Gene heterogeneity for tetracycline resistance in Staphylococcus spp
نویسندگان
چکیده
منابع مشابه
Plasmid for tetracycline resistance in Staphylococcus epidermidis.
A plasmid determining tetracycline resistance was demonstrated for Staphylococcus epidermidis. Tetracycline resistance was spontaneously lost from a S. epidermidis strain at a frequency of <0.1 to 1.3%. Frequency of loss was not appreciably enhanced by growth at 42 C or in ethyl violet. The rate of transduction of tetracycline resistance in three S. epidermidis crosses was decreased as a functi...
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متن کاملHeterogeneity of tetracycline resistance determinants in Streptococcus.
We found that naturally occurring tetracycline resistance in streptococci is encoded by more than one genetic determinant. Two of these distinct determinants were cloned, and the regions that are necessary and sufficient for expression of tetracycline resistance were defined by deletion analysis. These cloned determinants were further characterized by DNA-DNA hybridization experiments which als...
متن کاملTetracycline resistance heterogeneity in Enterococcus faecium.
The tetracycline (Tet) determinants, which encode resistance either to tetracyclines without minocycline (Tcr) or to tetracyclines including minocycline (Tcr-Mnr), of 30 wild-type clinical isolates of Enterococcus faecium were identified and localized. The Tet determinants were transferred by conjugation into a plasmid-free Enterococcus faecalis recipient at frequencies of 10(-6) to 10(-9) tran...
متن کاملAntimicrobial resistance in Staphylococcus spp
Staphylococcus aureus and coagulase-negative Staphylococcus (CoNS) are the main agents of nosocomial infections. The antimicrobial resistance of these microorganisms has increased worldwide, justified by the selective pressure caused by the use of broad spectrum antibiotics. The prophylactic antibioticotherapy is also a concerning factor, because it increases the risk of infection, and difficul...
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ژورنال
عنوان ژورنال: Antimicrobial Agents and Chemotherapy
سال: 1990
ISSN: 0066-4804,1098-6596
DOI: 10.1128/aac.34.8.1611