Cat-scratch disease (Bartonella) lesions or papules

Two Bartonella papules

Cat-scratch disease lesions or papules one week after inoculation (Source: Mazur-Melewska-et-al, copyright CC By 4.0)

Cat-scratch disease is caused by Bartonella henselae bacteria. Bartonella is transmitted to humans by cats, not ticks. Perfectly normal stretch marks are sometimes mistaken for a “Bartonella rash.” See more on our Bartonella page.