<Tr> <Th> Treatment </Th> <Td> Paracetamol (acetaminophen), NSAIDs, antibiotics </Td> </Tr> <Tr> <Th> Frequency </Th> <Td> 5 to 40% of sore throats </Td> </Tr> <P> Streptococcal pharyngitis, also known as strep throat, is an infection of the back of the throat including the tonsils caused by group A streptococcus (GAS). Common symptoms include fever, sore throat, red tonsils, and enlarged lymph nodes in the neck . A headache, and nausea or vomiting may also occur . Some develop a sandpaper - like rash which is known as scarlet fever . Symptoms typically begin one to three days after exposure and last seven to ten days . </P> <P> Strep throat is spread by respiratory droplets from an infected person . It may be spread directly or by touching something that has droplets on it and then touching the mouth, nose, or eyes . Some people may carry the bacteria without symptoms . It may also be spread by skin infected with group A strep . The diagnosis is made based on the results of a rapid antigen detection test or throat culture in those who have symptoms . </P>

What is the organism that causes strep throat