英语语法分析

Positive blood culture was found in 71 patients (57.7%) of viridans streptococci (32.4%), staphylococcus epidermidis (15.5%).

血培养阳性率为57.7％，其中主要致病菌是草绿色链球菌（32.4％）和表皮葡萄球菌（15.5％）。

It does not prevent infection by hemolytic streptococci.

它并不能防止溶血性链球菌的感染。

Streptococci and staphylococci are responsible for a wide variety of infections.

链球菌和葡萄球菌是引起许许多多不同感染的原因。