Bartonella henselae
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B. henselae
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| Bartonella henselae (Regnery et al. 1992)
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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[1] (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 bacillus 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).
Symptoms
Common symptoms:[2]
- Fever
- Enlarged, tender lymph nodes that develop 1–3 weeks after exposure
- A papule or pustule at the inoculation site
Treatment
Bartonella henselae (cat scratch disease) infections are usually self-limiting, but can be treated with azithromycin, doxycycline.[3]
See also
References
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- ↑ Bartonellosis~treatment at eMedicine
External Links
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