Streptococcal pharyngitis, also known as
strep throat, is an infection of the
back of the throat including the
tonsils caused by
group A streptococcus. 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.