Letter: Tetracycline-resistant group A streptococci.
نویسندگان
چکیده
منابع مشابه
Tetracycline-resistant streptococci in South-west Essex: a continuing survey.
Studies of beta-haemolytic streptococci isolated in material received from patients in South-west Essex for a further period of three years showed that the overall percentage of tetracycline resistance has remained almost stationary, varying from 28% in 1963 through 35% in 1965 to 27% in 1967.Ear, sound, and skin infections retain a high incidence of resistant strains, while sputa are still a r...
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Several resistant mutants of a transformable group H streptococcus, strain Challis, were isolated from media containing high concentrations of streptomycin. Mutants SR5a and SR5 exhibited high and low transformability, respectively, when exposed to deoxyribonucleic acid (DNA) from a novobiocin-resistant Challis strain. With similar exposure, mutant SR30 exhibited loss of transformability. The m...
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Penicillin-resistant and penicillin-tolerant mutants have been isolated from group A streptococci mutagenized by ethyl methane sulfonate. The resistant mutants had an elevated minimal growth inhibitory concentration for benzylpenicillin (minimal inhibitory concentration, 0.2 microgram/ml, as compared with the minimal inhibitory concentration of 0.006 microgram/ml in the penicillin-susceptible p...
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Macrolide-resistant group A streptococci (MRGAS) have been recovered from many countries worldwide. However, the strain typing information that is available has been insufficient for estimating the total number of macrolide-resistant clones, their geographic distributions, and their evolutionary relationships. In this study, sequence-based strain typing was used to characterize 212 MRGAS isolat...
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BACKGROUND Resistance to erythromycin has been very uncommon among group A streptococci in the United States. METHODS As part of a longitudinal study, we obtained surveillance throat cultures twice monthly and with each new respiratory tract illness from children in kindergarten through grade 8 at one school in Pittsburgh. Screening for resistance to erythromycin and clindamycin was initially...
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ژورنال
عنوان ژورنال: BMJ
سال: 1974
ISSN: 0959-8138,1468-5833
DOI: 10.1136/bmj.3.5928.467-b