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Causes
By Mayo Clinic staffThe cause of strep throat is bacteria known as Streptococcus pyogenes, or group A streptococcus.
Streptococcal bacteria are highly contagious. They can spread through airborne droplets when someone with the infection coughs or sneezes, or through shared food or drinks. You can also pick up the bacteria from a doorknob or other surface and transfer them to your nose or mouth.
- Strep throat. National Institute of Allergy and Infectious Disease. http://www.niaid.nih.gov/topics/strepThroat/Pages/default.aspx. Accessed April 22, 2010.
- Giannoni CM. Streptococcal pharyngitis. In: Bope ET, et al. Conn's Current Therapy 2010. 61st ed. Philadelphia, Pa.: Saunders Elsevier; 2009. http://www.mdconsult.com/book/player/book.do?method=display&type=bookPage&decorator=header&eid=4-u1.0-B978-1-4160-6642-2..00003-X--sc0070&uniq=195595841&isbn=978-1-4160-6642-2. Accessed April 22, 2010.
- Fort GG. Pharyngitis/tonsillitis. In: Ferri FF. Ferri's Clinical Advisor 2010. St. Louis, Mo.: Mosby; 2009. http://www.mdconsult.com/das/book/body/197105845-8/0/2088/496.html?tocnode=58133576&fromURL=496.html#4-u1.0-B978-0-323-05609-0..00025-3--sc0140_10202. Accessed April 22, 2010.
- Choby B. Diagnosis and treatment of streptococcal pharyngitis. American Family Physician. 2009;79:383.
- Hayden GF, et al. Acute pharyngitis. In: Kliegman RM, et al. Nelson Textbook of Pediatrics. 18th ed. Philadelphia, Pa.: Saunders Elsevier; 2007. http://www.mdconsult.com/das/book/body/197105845-9/0/1608/897.html?tocnode=54482109&fromURL=897.html#4-u1.0-B978-1-4160-2450-7..50380-7_7372. Accessed April 22, 2010.
- Fleisher GR. Evaluation of sore throat in children. http://www.uptodate.com/home/index.html. Accessed April 22, 2010.
- Fort GG. Rheumatic fever. In: Ferri FF. Ferri's Clinical Advisor 2010. St. Louis, Mo.: Mosby; 2009. http://www.mdconsult.com/das/book/body/195595841-8/984459939/2088/572.html#4-u1.0-B978-0-323-05609-0..00027-7--s2315_11750. Accessed April 22, 2010.
- Hoecker JL (expert opinion). Mayo Clinic, Rochester, Minn. April 30, 2010.
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