Bacillary Angiomatosis (BA) is caused by Bartonella Henselae or Bartonella Quintana and causes proliferation of blood vessels in the skin and internal organs. The bacterial can affect any of human organ systems, particularly skin and subcutaneous tissue. BA can also cause disseminated visceral disease (peliosis), chiefly in the liver (peliosis hepatis), spleen, and lymph nodes to a person.

Bartonella Henselae is spread through bite or scratch of a cat and Bartonella Quintana is transmitted by bedbugs. Those suffering with AIDS have more chances to get infected with BA. Further, various cases around the word have also been registered in organ transplant recipients, in patients with leukemia and those going through systemic steroid therapy.

Bacillary Angiomatosis (BA) basically causes presence of lesions on or under the skin, which can appear in several forms.

The disease can be diagnosed by testing the blood or by reviewing symptoms, history and negative tests for other diseases that cause swollen lymph glands.

As recommended by researchers, Erythromycin is one antibiotic that can help in fading away the spots in few months. However, as per the recent research work, antibiotics used to treat other HIV opportunistic infections can also help a person against BA.