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

Question

Quizplus · Accepted Answer

The presence of nucleated amastigotes in white blood cells is highly indicative of leishmaniasis, which is caused by parasites of the genus Leishmania and transmitted by sand flies in endemic regions such as Mexico. The other options listed do not typically present with this specific diagnostic feature.

A Patient Returning from an Extended Trip into Mexico Has