Miyamoto Y, Takizawa K, Matsushima A, Asai Y, Nakatsuka S
Antimicrob Agents Chemother. 1978 Mar;13(3):399-404. doi: 10.1128/AAC.13.3.399.
We collected 1,353 strains of beta-hemolytic streptococci of groups A, B, C, and G (1,176 strains of which were group A) isolated in 26 institutions throughout Japan in 1972-1974. The strains were grouped and T-typed by our specific group-and T-factor sera, and the minimal inhibitory concentrations of 10 antibiotics were assayed by the standard method. Resistant strains from the above collection were classified according to group, T-type, and drug resistance pattern. Our data on T-types for 1964-1971 and on drug resistance for 1966-1971 were used to interpret the detected long-term variations in T-type and drug resistance. The stepwise acquisition of multiple drug resistance, the difference in resistance pattern between predominant T-types, and the rarity of single-macrolide resistance were demonstrated.
我们收集了1972年至1974年期间在日本全国26个机构分离出的1353株A、B、C和G组β溶血性链球菌(其中1176株为A组)。这些菌株通过我们特定的组和T因子血清进行分组和T分型,并采用标准方法测定10种抗生素的最低抑菌浓度。根据上述收集的耐药菌株,按照组、T型和耐药模式进行分类。我们利用1964年至1971年的T型数据以及1966年至1971年的耐药数据来解释检测到的T型和耐药性的长期变化。结果表明,多重耐药性是逐步获得的,主要T型之间的耐药模式存在差异,且单一大环内酯耐药情况罕见。