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Streptococcal pharyngitis, also known as streptococcal tonsillitis, streptococcal sore throat, strep throat or simply strep, is inflammation of the back of the throat caused by a group A streptococcal infection. It affects the pharynx including the tonsils and possibly the larynx. Common symptoms include fever, sore throat, and enlarged lymph nodes. It is the cause of 15–40% of sore throats among children〔〔 and 5–15% in adults.〔 Strep throat is a contagious infection, spread through close contact with an infected individual. A definitive diagnosis is made based on the results of a throat culture. However, this is not always needed as treatment may be decided based on symptoms. In highly likely or confirmed cases, antibiotics are useful to both prevent complications and speed recovery.〔 Potential complications include rheumatic fever. ==Signs and symptoms== The typical symptoms of streptococcal pharyngitis are a sore throat, fever of greater than , tonsillar exudates (pus on the tonsils), and large cervical lymph nodes. Other symptoms include: headache, nausea and vomiting, abdominal pain, muscle pain,〔 or a scarlatiniform rash or palatal petechiae, the latter being an uncommon but highly specific finding.〔 The incubation period and thus the start of symptoms for strep throat is between one to three days post contact.〔 Strep throat is unlikely when any of the symptoms of red eyes, hoarseness, runny nose, or mouth ulcers are present. It is also unlikely when there is no fever.〔 File:StrepAug2010.JPG|Mouth wide open showing the throat A throat infection which on culture tested positive for group A streptococcus. Note the large tonsils with white exudate. File:Streptococcal pharyngitis.jpg|Mouth wide open showing the throat Note the petechiae, or small red spots, on the soft palate. This is an uncommon but highly specific finding in streptococcal pharyngitis.〔 File:Strep throat2010.JPG|A set of large tonsils in the back of the throat covered in white exudate. A culture positive case of streptococcal pharyngitis with typical tonsillar exudate in an 8 year old. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Streptococcal pharyngitis」の詳細全文を読む スポンサード リンク
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