Babesiosis Presenting as Acute Liver Failure.

Babesiosis is a zoonotic, tick-borne infection caused by the protozoan . It is transmitted by the ticks which transmit the infection to humans. , , , and are species that have been identified as being infectious to humans worldwide. The most common species causing infection to humans is which is endemic to the Northeast and Midwestern United States with most infections occurring between the months of May and October. We report a case of an elderly man with acute liver failure due to an infection with .