Strep throat is an infection caused by a type of bacteria
called group A streptococcus (say: strep-toe-KOK-us). Not
all sore throats are due to a strep infection.
To figure out if you have strep
throat, your doctor will ask you so say "ahh" to see inside your mouth. He or
she may use a swab to collect bacteria on the back of your throat. If you do have
strep, you'll need to take antibiotics
to help you feel better.