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Observed and expected combined effects of clinical mastitis and low body condition on pregnancy loss in dairy cows
- Source :
-
Theriogenology . Jan2012, Vol. 77 Issue 1, p115-121. 7p. - Publication Year :
- 2012
-
Abstract
- Abstract: The objective was to compare the observed and expected combined effects of clinical mastitis before timed artificial insemination (TAI) and low body condition at 70 d postpartum (dpp) on pregnancy loss in dairy cows. Cows were examined for pregnancy by ultrasonographic examination 28–32 d after TAI; the presence of an embryo with a heartbeat was the criterion used to determine pregnancy. Cows diagnosed pregnant were re-examined by transrectal palpation of the uterus and its contents 28 d later to confirm pregnancy status and to identify pregnancy loss. Eighty-eight (17%) of 512 cows were diagnosed with pregnancy loss. Cows affected with clinical mastitis before insemination and a body condition score (BCS) ≤ 2.75 at 70 dpp were 2.03 times more likely to experience pregnancy loss, compared to cows without clinical mastitis and with a BCS > 2.75 (RR = 2.03; 95% CI = 1.15, 3.60; P = 0.01). This observed combined effect for pregnancy loss (RR = 2.03) was higher than the expected combined effect based on adding (RR = 1.39) or multiplying (RR = 1.42) absolute independent excesses due to clinical mastitis or low body condition. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 0093691X
- Volume :
- 77
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Theriogenology
- Publication Type :
- Academic Journal
- Accession number :
- 69864546
- Full Text :
- https://doi.org/10.1016/j.theriogenology.2011.07.023