The Strep A Lowdown Strep A is not a new bug. It can cause infections like tonsillitis, scarlet fever and skin infections like impetigo. Most infections are mild and can be effectively treated with a course of antibiotics. Save this video for the symptoms of Strep A and when you should see a doctor. #strepa #strepthroat #coldsymptoms #doctorsadvice #doctorrecommended #tonsillitis #tonsils #scarletfever #impetigo #infections