11/08/2025
The most common group A strep infection is strep throat, which usually causes fever and sore throat without viral illness symptoms such as runny nose and cough. Strep throat is especially common among school-aged children and teenagers.
Cough, runny nose, hoarseness (changes in your voices that make sound raspy) and conjunctivitis (also called pinkeye) are not symptoms of strep throat. If your child has these symptoms, a virus may be the cause of illness instead. It’s important to be able to distinguish a strep throat from a viral sore throat, because strep infections are treated with antibiotics.
If your child has a throat or skin infection caused by group A strep bacteria, they can go back to school or child care once they’ve had two doses of a course of an appropriate antibiotic 12 hours apart without fever.
Most types of throat infections are contagious. They are passed primarily through the air on droplets of moisture or on the hands of someone infected. For that reason, it makes sense to keep your child away from people who have symptoms of strep throat and other throat infections. However, most people are contagious before their first symptoms appear. So, there’s often no practical way to prevent your child from contracting the disease.
If a child’s strep throat is not treated with antibiotics, or if they don’t complete the treatment, the infection may worsen or spread to other parts of their body. This can lead to conditions such as abscesses of the tonsils or kidney problems. Untreated strep infections also can lead to rheumatic fever, a disease that affects the heart. However, rheumatic fever is rare in the United States and in children under 5 years old.
In infants, toddlers and preschoolers, the most frequent cause of sore throats is a viral infection. No specific medicine is required when a virus is responsible, and your child should get better over a 7- to 10-day period.