1. Bovine thrombocytes and erythrocytes became labeled with P32 following an intramuscular injection of DFP.32
2. The life span of bovine thrombocytes calculated from survival curves of DFP32-labeled thrombocytes was about 10 days.
3. The life span of bovine erythrocytes calculated from the linear portion of the survival curve was about 110 to 120 days.
4. There was no significant difference between the life span of the thrombocytes and erythrocytes from normal calves and those from calves with thrombocytopenia induced by the feeding of trichloroethylene-extracted soybean oil meal.