In a three years old Brown Swiss cattle showing the signs of fever, loss of appetite, exhaustion and anemia, blood smears stained with Giemsa was done. In the microscopic examination, round-shaped Eperythrozoon wenyoni on the surface of erythrocytes, in the numbers ranging from one to 50, a few chain-shaped Haemobartonella bovis on the peripher of erythrocytes and Theileria sp. were detected.

This study reports the presence of clinically E. wenyoni and H. bovis in cattle, for the first time in Turkey.