A sore throat that starts quickly, pain with swallowing, and fever are some of the common signs and symptoms of strep throat. Strep throat is an infection in the throat and tonsils caused by bacteria called group A Streptococcus (group A strep). Anyone can get strep throat, but it is more common in children. According to the Centers for Disease Control and Prevention, up to three in 10 children with a sore throat have strep throat. Group A strep live in the nose and throat and can easily spread to other people. In an article by Singlecare, SMG internist Dr. Soma Mandal helps guide parents through this common condition in kids.