A patient returning from an extended trip into Mexico has the following symptoms: a papule at the site of a previous bug bite and enlarged lymph nodes. Microscopic examination of the papule reveals nucleated cells in white blood cells. The patient most likely has
A) schistosomiasis.
B) anthrax.
C) brucellosis.
D) malaria.
E) leishmaniasis.

Question

Quizplus · Accepted Answer

The symptoms and microscopic findings are consistent with leishmaniasis, a disease caused by protozoan parasites transmitted by sandfly bites, common in Mexico. The nucleated cells in white blood cells suggest the presence of Leishmania parasites.

A Patient Returning from an Extended Trip into Mexico Has