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''Streptococcus suis'' is a peanut-shaped, Gram-positive bacterium, and an important pathogen of pigs. Endemic in nearly all countries with an extensive pig industry, ''S. suis'' is also a zoonotic disease, capable of transmission to humans from pigs. Humans can be infected with ''S. suis'' when they handle infected pig carcasses or meat, especially with exposed cuts and abrasions on their hands. Human infection can be severe, with meningitis, septicaemia, endocarditis, and deafness as possible outcomes of infection. Fatal cases of ''S. suis'' are uncommon, but not unknown.〔 Penicillin is the most common antibiotic used in treatment of ''S. suis'' infection; in cases with cardiac involvement (endocarditis), gentamicin should also be given for synergistic effect. ==Clinical signs and diagnosis== The first sign in pigs is usually pyrexia and there may be sudden deaths in the herd. Respiratory disease, with pneumonia, nasal discharge and respiratory difficulties, may also be present. Neurological signs result from meningitis, and signs may be severe, ranging from tremors to seizures and death. Joints may become infected and pigs may be lame or have swollen limbs. Skin disease is another presentation, and reproductive disease can also occur. Meningitis is the most common presentation in humans. 〔(Streptococcus and Enterococcus Infections - Pigs ) reviewed and published by WikiVet, accessed 12 October 2011.〕 The bacterium can be isolated from various body fluids, and serological testing with an ELISA can also be performed.〔 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「Streptococcus suis」の詳細全文を読む スポンサード リンク
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