HiCromeâ„¢ Strep B Selective HiCynthâ„¢ Agar Base is recommended for selective isolation of Group B streptococci from clinical samples. Group B Streptococcus is a leading infection causing illness and death in newborns. Group B streptococci can also cause serious diseases in pregnant women, the elderly, and adults with other illnesses. HiCromeâ„¢ Strep B Selective HiCynthâ„¢ Agar Base is prepared by completely replacing animal based peptones with chemically defined peptones to avoid BSE/TSE risks associated with animal peptones.