Bartonella henselae is a proteobacterium that can cause bacteremia, endocarditis, bacillary angiomatosis, and peliosis hepatis. It is a causative agent of cat-scratch disease which occurs after a cat bite or scratch. The disease is characterized by swelling of the lymph nodes and fever.
B. henselae can cause Peliosis hepatic which may develop with cutaneous bacillary angiomatosis or bacteremia. Those with peliosis hepatitis can have gastrointestinal symptoms, fever, chills, and an enlarged liver. It is most common in patients infected with HIV and other immunocompromised individuals.
It is a member of the class of Bartonella genus, one of the most common bacteria in the world.