| Abstract: | Blood from 171 pregnant and 65 nonpregnant cows was taken at slaughter for culture and examined during the culturing period for Trypanosoma theileri once a week for 5 weeks. Of the 171 fetuses from the pregnant cows, 119 (69.6%) were greater than or equal to 4 months gestation; blood samples from these fetuses were also taken for culture. Of 236 cows (81 of 171 [47.4%] pregnant and 20 of 65 [30.8%] nonpregnant cows), 101 (42.8%) were culture positive. More of the pregnant than nonpregnant cows were culture positive (P less than 0.05). More beef cows (48.0%) than dairy cows (34.1%) were culture positive (P less than 0.025). Two of the 119 (1.7%) fetus samples were found culture positive. The percentages of positive cultures from Brucella-reactor cows, 18 of 40 (45.0%), and from non-Brucella-reactor cows, 83 of 196 (42.3%), were similar. However, both of the culture-positive fetuses were from Brucella-reactor cows. |
