Severe babesiosis caused by Babesia divergens in a host with intact spleen, Russia, 2018.

We report a case of severe babesiosis caused by the bovine pathogen Babesia divergens with the development of multisystem failure in a splenic host. Immunosuppression other than splenectomy can also predispose people to B. divergens.

Fatal human babesiosis caused by in an asplenic host.

We report a fatal case of human babesiosis caused by bovine pathogen in Russia. Falciparum malaria was falsely diagnosed due to the presence of small ring forms in the blood smear. Laboratory diagnosis can distinguish between babesiosis and malaria according to the examination of stained blood smears.