How can I test for Group B Strep from a vaginal/rectal OB specimen?
A. Currently, the CDC recommends overnight incubation of the specimen in LIM Broth (Cat. no. L57) or other selective enrichment, and then subculture to a non-selective Sheep Blood Agar plate (Cat. no. A10). Catalase-negative, beta-hemolytic and non-beta-hemolytic colonies after 18-24 hours of incubation should be tested further using a slide agglutination test such as Hardy’s StrepPRO™” Grouping Kit (Cat. no. PL030HD).