Pharyngitis is a topic covered in the Guide to Diagnostic Tests.

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Exudative: S. pyogenes (GPC) (15–30%), viruses (rhinovirus, coronavirus, adenovirus) (30%), group C and G streptococci (GPC) (5%), herpes simplex virus (HSV) (4%), parainfluenza and influenza virus A and B (2–4%), Epstein-Barr virus (mononucleosis) (1%), HIV (1%), N. gonorrhoeae (GNDC) (1%), C. diphtheriae (GPR) (≤1%), Arcanobacterium hemolyticum (GPR) (≤1%), M. pneumoniae , C. pneumoniae .

Membranous: C. diphtheriae (GPR), C. pseudodiphtheriticum (GPR), HSV, Epstein-Barr virus.

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