Artificial elimination of drug resistance from group A beta-hemolytic streptococci.
نویسندگان
چکیده
Ten strains of beta-hemolytic streptococci were tested for elimination of resistance to macrolide antibiotics, tetracycline, and chloramphenicol. Six of the strains lost resistance after cultivation at 41 C or addition of acriflavine (0.2 mug/ml). These results suggest that determinants governing resistance to these antibiotics are located on extrachromosomal genetic elements (plasmids) that are widely distributed in streptococci.
منابع مشابه
بررسی صحت تشخیص بالینی فارنژیت استرپتوککی در بیماران مراجعه کننده به بیمارستان‌های زنجان
Background and Objective: Streptococcal pharyngitis is one of the most common bacterial infections that its improper treatment could lead to complications such as heart and kidney problems. Although streptococcal pharyngitis makes up a low percentage of pharyngitis etiology, penicillin derivatives are prescribed for many of the patients with pharyngitis. The aim of this study was to determine t...
متن کاملمقاومت آنتی‌بیوتیکی استرپتوکوک بتا همولیتیک گروه A در کودکان حامل بدون علامت در شهرستان رفسنجان در سال 1388
Received: 20/08/2011 Sent for Revision: 21/11/2011 Received Revised Manuscript: 14/07/2012 Accepted: 04/08/2012 background and Objective: Group A Beta hemolytic streptococci (GABHS) is the most common bacterial cases of acute pharyngitis in school children. Diagnosis of the etiological agent and appropriate anibiotic therapy is important. The aim of this study was to determine the antibio...
متن کاملشیوع حلقی استرپتوکوکوس بتاهمولیتیک گروه A در کودکان دبستانی شهر زاهدان در سال1380
Background & Objectives: Pharyngitis and rheumatic fever due to beta hemolytic group A streptococci are among the chief health problems. Since the carriers play a major role in spread of infection within the family and school , and regarding the drug resistance , this study was carried out in order to determine the relative prevalence of pharyngeal colonization of group A streptococci among ele...
متن کاملAntibiotic Resistance of Non- pneumococcal Streptococci and Its Clinical Impact
The taxonomy of streptococci has undergone major changes during the last two decades. The present classification is based on both phenotypic and genotypic data. Phylogenetic classification of streptococci is based on 16S rRNA sequences [1], and it forms the backbone of the overall classification system of streptococci. Phenotypic properties are also important, especially for clinical microbiolo...
متن کاملAntimicrobial Susceptibility Patterns and Macrolide Resistance Genes of β-Hemolytic Viridans Group Streptococci in a Tertiary Korean Hospital
The aim of this study was to investigate antimicrobial susceptibilities and macrolide resistance mechanisms of beta-hemolytic viridans group streptococci (VGS) in a tertiary Korean hospital. Minimum inhibitory concentrations (MICs) of seven antimicrobials were determined for 103 beta-hemolytic VGS isolated from various specimens. The macrolide resistance mechanisms of erythromycin-resistant iso...
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ورودعنوان ژورنال:
- Antimicrobial agents and chemotherapy
دوره 7 5 شماره
صفحات -
تاریخ انتشار 1975