Streptococcal pharyngitis, also known as streptococcal pharyngitis or bacterial tonsillitis, is a throat infection involving the tonsils caused by group-A streptococcus (GAS). Common symptoms include fever, sore throat, red tonsils (tonsilitis), and swollen lymph nodes in the neck. Headaches, nausea and vomiting can also occur. Some people develop a sandpaper-like rash known as scarlet fever. Symptoms usually begin 1-3 days after exposure and last 7-10 days. Streptococcal pharyngitis is transmitted via respiratory droplets from an infected person. It can be spread by touching something directly or with a drop of water and then touching the mouth, nose, or eyes. Some people can carry bacteria without symptoms. It can also be transmitted through the skin infected with group A streptococcus. Diagnosis is based on the results of rapid antigen testing or throat culture in symptomatic patients. Prevention is by washing hands and not sharing eating utensils. There is no vaccine for the disease. Treatment with antibiotics is only recommended in those with a confirmed diagnosis. Those infected should stay away from other people until fever is gone and for at least 12 hours after starting treatment.