1990 Volume 43 Issue 5 Pages 347-350
A 21-month-old, female, Holstein-Friesian cattle was introduced from Iwate Prefecture to Yamagata Prefecture 10 months ago and raised for fattening. The cattle suddenly sowed severe anemia, jaundice, and hemoglobinuria. After various treatment, clinical and clinicopathological examinations for 8 days, she was euthanatized and submitted for pathological examination.
Hematologically, hemolysis, erythropenia, leukocytosis, neutrophilia and parasitemia of Theileria sergenti were seen. Immunofluorescent antibody to Babesia ovata was positive, but no B. ovata was detected in blood. smears. The serum GOT, γ-GT, and total bilirubin had increased rapidly in the course of sickness. At necropsy, marked jaundice, enlarged spleen and liver, and the distended gallbladder filled with thick bile were noted. These findings suggested that the cattle may have suffered from a mixed infection with B. ovata and T. sergenti.
