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''Bartonella henselae'', formerly ''Rochalimæa'', is a proteobacterium that can cause bacteremia, endocarditis, bacillary angiomatosis, and peliosis hepatis. It is also the causative agent of cat-scratch disease (bartonellosis) which, as the name suggests, occurs after a cat bite or scratch. The disease is characterized by lymphadenopathy (swelling of the lymph nodes) and fever. Peliosis hepatis caused by ''B. henselae'' can occur alone or develop with cutaneous bacillary angiomatosis or bacteremia. Patients with peliosis hepatis present with gastrointestinal symptoms, fever, chills, and an enlarged liver and spleen containing blood-filled cavities. This systemic disease is mostly seen in patients infected with HIV and other immunocompromised individuals. ''Bartonella henselae'' is a member of the class of the ''Bartonella'' genus, one of the most common types of bacteria in the world. It infects the host cell by sticking to it using the Trimeric Autotransporter Adhesins (TAA). The presence of bacteria can be detected by a special stain called Warthin-Starry stain, or by a similar silver stain technique performed on infected tissue. ==Diagnosis== ''Bartonella henselae'' is gram negative rod or bacilli with a polar flagellum. ''Bartonella henselae'' can be cultured in a lysis-centrifugation blood culture. The diagnosis is made after a detailed patient history and physical is taken. A hallmark of the infectious process include history of contact with a cat. (cat scratch disease). 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「Bartonella henselae」の詳細全文を読む スポンサード リンク
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