what causes strep b
Group B Strep Infection Cause. Group B strep infections are caused by bacteria from the species and genus Streptococcus agalactiae. Streptococci were divided into groups in 1933 by mixing the strains with antibodies that were produced in rabbits.roup B strep is not a cause of birth defects or autism and is not a sexually transmitted disease. Although babies may contract infections by contact with contaminated hands, washing with simple soap and water eliminates the organism. Group B strep is not contagious through coughing or sneezing.