Bacillary Angiomatosis. (A) Multiple erythematous nodules on the face. (B) Close-up view of multiple exophytic nodules. (C) Clumps of tangled, dark bacilli on a Warthin–Starry stain (×100). Bacillary angiomatosis. Mejía F, Seas C - The American journal of tropical medicine and hygiene (2014). Not altered. CC.
Bacillary angiomatosis is an opportunistic ailment of immunocompromised persons displaying as vascular proliferations caused by Bartonella Henselae and Bartonella Quintana gram-negative bacilli.