What causes streptococcus infection?

Strep throat is caused by infection with a bacterium known as Streptococcus pyogenes, also called group A streptococcus. Streptococcal bacteria are contagious. They can spread through droplets when someone with the infection coughs or sneezes, or through shared food or drinks.

Who is most likely to get streptococcus?

Strep throat is more common in children than adults. It is most common in children 5 through 15 years old. It is very rare in children younger than 3 years old.

Where does Streptococcus B bacteria come from?

Group B Streptococcus (group B strep, GBS) is a type of bacteria often found in the urinary tract, digestive system, and reproductive tracts. The bacteria come and go from our bodies, so most people who have it don’t know that they do. GBS usually doesn’t cause health problems.