Group A streptococcal infections are caused by a group of bacteria in the streptococcus family. These infections include strep throat, scarlet fever, and others.
Group A streptococcal, or GAS, bacteria are often found on the skin and in the throat of healthy individuals. Most of the time, GAS bacteria cause no symptoms at all. At other times, these bacteria affect various parts of the body and cause an infection. GAS infections include the following:
GAS infections are caused by certain strains of streptococcal bacteria. People who have underlying diseases such as diabetes can have more serious infections. Those with weakened immune systems are at higher risk. Chickenpox infection in children is now known to be a risk for serious GAS disease.