Strep throat is a contagious disease caused by infection with streptococcal bacteria, which causes inflammation and swelling of the mucous membranes lining the back of the throat and the tonsils. It is a common cause of sore throat in school-aged children and teens, and its prompt diagnosis and treatment is important to prevent any potential complications. It is important to note that most cases of sore throat are in fact due to a viral infection (caused by a virus). A viral sore throat typically improves on its own and does not respond to treatment with antibiotics.
