| some factors affecting the abortion rate in dairy herds with high incidence of neospora-associated abortions are different in cows and heifers. | the aim of this study was to determine if the factors affecting the abortion rate in dairy herds with high incidence of neospora-associated abortions are different in pregnancies of cows and heifers chronically infected with neospora caninum. in heifers (n = 229), an increase in the cumulative number of days with a mean relative humidity (rh) lower than 60% during the second trimester of gestation increases the risk of abortion. yet, the likelihood of abortion was 7.6 times lower for pregnant he ... | 2010 | 19210662 |
| effects of crossbreed pregnancies on the abortion risk of neospora caninum-infected dairy cows. | previous studies have shown that the use of beef bull semen significantly reduces the rate of abortions due to neospora caninum in artificially inseminated (ai) seropositive dairy cows. in addition, certain beef breeds could be more resistant to n. caninum infection and abortion than others. the aim of the present study was to determine whether different crossbreed pregnancies, those derived from limousin, charolais, piedmontese or belgian blue semen, carry different risks of abortion in neospor ... | 2009 | 19464119 |