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Distribution of Streptococcal Groups in Clinical Specimens with Evaluation of Bacitracin Screening

机译:链球菌群在临床标本中的分布以及杆菌肽筛选的评估

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During a 2-year period, 4,968 strains of beta-hemolytic streptococci were examined for the clinical source distribution and bacitracin sensitivity of each group. In the upper respiratory tract, groups A (51.7%) and C (20.4%) accounted for most of the isolates, and in wounds and exudates group A (79.1%) made up most of the isolates. Group B (71.2%) was the major component of isolates from the genitorinary tract and, while composing 29.3% of the lower respiratory tract isolates, competed with group A (18.8%) and the nongroupables (22.8%) for supremacy. Bacitracin screening showed that 0.5% of group A streptococci were resistant, and sensitive non-group A isolates were group B (2.6%), group C (6.0%), group G (8.0%), and the nongroupables (2.2%). It was found that those groups which were most predominant in wounds and the upper respiratory tract gave the highest rate of false positives with bacitracin, whereas the predominant group of the genitourinary tract gave the lowest rate of false positives.
机译:在2年的时间里,检查了4968株β-溶血性链球菌菌株的临床来源分布和杆菌肽敏感性。在上呼吸道中,A组(51.7%)和C组(20.4%)占大多数分离株,而在伤口和渗出液中,A组(79.1%)占大多数分离株。 B组(71.2%)是来自泌尿生殖道的分离株的主要成分,虽然占下呼吸道分离株的29.3%,但与A组(18.8%)和不可分组的人(22.8%)竞争优势。杆菌肽筛选显示0.5%的A组链球菌具有耐药性,敏感的非A组分离株为B组(2.6%),C组(6.0%),G组(8.0%)和不可分组的(2.2%)。发现在杆菌肽中,伤口和上呼吸道占优势的组假阳性率最高,而泌尿生殖道占优势的组假阳性率最低。

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