Uterine bacteriology, Prostaglandin F sub(2alpha) metabolite and progesterone profiles, blood granulocyte function and uterine cytology in postpartum cows after dexamethasone-induced parturition
2000
Kask, K. | Kindahl, H. | Magnusson, U. (Swedish University of Agricultural Sciences, Uppsala (Sweden) | Dept. of Obsterics and Gynaecology) | Gustafsson, H. (Swedish Dairy Association, Eskiltuna (Sweden))
Parturitions were induced in 10 cows 2.5 weeks before term using dexamethasone. Four cows had retained fetal membranes (RFM), 3 cows had fragments of placentas (F) during 5 days postpartum (PP), and in 3 cows the puerperium was considered to be normal. Phagocytosis capacity was analysed using the chemiluminescence test. The most dominating species of bacteria found were Actinomyces pyogenes, Bacteroides spp., Fusobacterium necrophorum, and Escherichia coli. The highest incidence of bacteriological species was found during the first 3 weeks after parturition in the RFM- and F-groups. Significant differences were found regarding bacterial presence and elimination between RFM- and N-cows during the experimental period (p0.05). Immediately after parturition, high levels of PGF sub(2 alpha)-metabolite were seen. In all cows except one, the levels were found to be elevated during the first 3 weeks PP and then decreased to baseline and further elevations were seen associated with luteolysis. According to progesterone profiles, 7 out of 10 cows ovulated during the experimental period. In 6 of 7 ovulated cows, short oestrous cycles were found. In the 3 non-ovulating cows, low levels of progesterone were seen during the whole experimental period. Statistical differences in the numbers of PMN were found between RFM-cows and F-cows and RFM-cows and N-cows between 24-34 PP (p0.05)
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