An epidemic infection of group-A .BETA.-hemolytic streptococci in a small community.

Group B beta-hemolytic streptococci causing pharyngitis.

Group B beta-hemolytic streptococci were isolated from the throats of 49 of 1,110 patients who had pharyngitis. Compared with patients whose throat cultures were negative for beta-hemolytic streptococci, those harboring group B were more likely to have enlarged tonsils (P less than 0.001), exudate (P less than 0.02), and tender enlarged anterior cervical lymph nodes (P less than 0.01). Group B ...

Hemolytic Streptococci Recovered During an Epidemic in a Kindergarten *

The methods of Lancefield and of Griffith for grouping and typing hemolytic streptococci have greatly facilitated studies on the relationship of the hemolytic streptococcus to human disease. Strains from human disease fall into Lancefield's Group A by the precipitin test.5 Exceptions occur, but they are rare.' Group A consists of about 30 types which can be identified by another precipitin test...

Typing Group a Hemolytic Streptococci

Two methods of typing group A hemolytic streptococci have been described: slide agglutination and anti-M precipitin tests. The first, developed by Griffith (1), is more extensively used. I t has the distinct advantages of requiring small amounts of serum and culture, and of a quick reaction time when all conditions are favorable. I t has certain disadvantages: The granular growth of some strain...

Group A beta hemolytic streptococci and rheumatic fever in Miami, Florida. III. Bacteriologic observations on beta hemolytic streptococci other than group A.

Evaluation of bacterial interference and beta-lactamase production in management of experimental infection with group A beta-hemolytic streptococci.

The in vivo effects of penicillin and cefprozil therapy on the interaction between organisms commonly recovered from inflamed tonsils were studied by using a subcutaneous abscess model in mice. These organisms were group A beta-hemolytic streptococci (GABHS), Streptococcus salivarius (which is capable of interfering with GABHS), and Staphylococcus aureus. In mice infected with GABHS and S. sali...