As beta-haemolytic streptococci can be cultured in people with and in those without a sore throat, a case-control study was set up in 43 family practices in The Netherlands. The association was tested between the number of colony counts, specific T/M types and exotoxin genes and an acute sore throat. Duplicate throat swabs were taken from 663 sore-throat patients, selected by clinical criteria, and from 694 healthy controls. They were cultured for beta-haemolytic streptococci by combining several updated laboratory methods. Approximately 40
作者：S, Zwart；G J, Ruijs；A P, Sachs；W J, van Leeuwen；J W, Gubbels；R A, de Melker
来源：Scandinavian journal of infectious diseases 2000 年 32卷 4期
