Bartonella species are gram-negative bacteria previously classified as Rickettsiae. They are facultative intracellular organisms that typically live within red blood cells (RBCs) and endothelial cells. They cause several uncommon diseases (see table Some Bartonella Infections Some Bartonella Infections Bartonella species are gram-negative bacteria previously classified as Rickettsiae. They are facultative intracellular organisms that typically live within red blood cells (RBCs) and endothelial... read more ):
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Regional lymphadenitis and constitutional symptoms (cat-scratch disease Cat-Scratch Disease Cat-scratch disease is infection caused by the gram-negative bacterium Bartonella henselae. Symptoms are a local papule and regional lymphadenitis. Diagnosis is clinical and confirmed by biopsy... read more
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Risk is higher in immunocompromised hosts.
Bartonella infection (bartonellosis) is usually acquired by humans via an insect vector.
