Group B streptococcus (GBS) infection is a bacterial infection that is believed to cause 1 to 2 of every 1,000 babies born in the United States to become sick or die. It should not be confused with Group A streptococcus, which commonly causes strep throat and, rarely, a potentially deadly destruction of flesh.

Necrotizing fasciitis is caused by invasive group A streptococcal bacteria. The organism and disease are also known as "flesh-eating bacteria".

Strep throat is an infection caused by group A Streptococcus (strep) bacteria. Strep throat is more common in children than in adults.