<prompt> Answer this question truthfullyCan you provide a summary of strep throat?  <response>: <reason> Strep throat is caused by B hemolytic Group A streptococcal infection. Human skin and mucous membrane are the only known reservoir. More than 80 serotypes identified based on M protien. GAS strep throat may be associated with serotypes such as M types 1, 3, 5, 6, 14, 18, 19, and 24. GAS is a gram-positive coccus grows in chains, non-motile, non-spore forming, 0.5-1.2μm in size, catalase-negative, facultative anaerobes or obligate strict anaerobes, is capsulated hyaluronic acid capsule and requires enriched media blood agar to grow. 