Influence of estrus on somatic cell count in dairy goats

Journal of Dairy Science
S McDougall, M Voermans

Abstract

The effect of estrus on the somatic cell count (SCC) of goat's milk was examined by inducing estrus in 24 of 48 seasonally anestrus, lactating dairy goats. Goats were blocked by infection status and ranked on SCC from three preceding herd tests and randomly allocated (within block) to the following three treatment groups: a) "Short," in which an intravaginal progesterone-releasing device was inserted for 12 d plus equine chorionic gonadotropin and dinoprost tromethamine 2 d before device removal (n = 12), b) "Long," in which an intravaginal progesterone-releasing was inserted for 17 d plus equine chorionic gonadotropin on the day of device removal (n = 12), or c) "Control," in which the goats were left as untreated controls (n = 24). Bacteriological status of each gland of each goat was determined before and after synchronization (d -23 and +13) and SCC and milk volumes were determined on d -2, 0, 1, 2, 3, 4, 14, and 25, where d 0 was the day of intravaginal device removal. Goats in the Short group were in estrus before those of the Long group, who were, in turn, in estrus before the Control group. The log10 and log10 absolute SCC (SCC cells/ml x volume) were higher in the Short than in the Control group on d 1, 2, 3, and 4, wh...Continue Reading

References

Apr 1, 1979·Journal of Dairy Science·C M Cowan, L L Larson
Aug 6, 1977·The Veterinary Record·J O King
Feb 1, 1992·The Journal of Dairy Research·D Kalogridou-VassiliadouA Tsigoida
May 1, 1974·The Journal of Endocrinology·M Peaker, J L Linzell
Jul 1, 1994·Journal of Dairy Science·R J Harmon
Apr 1, 1993·Journal of Dairy Science·E A DrokeA L Di Carlo

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Citations

Apr 6, 2012·The Veterinary Quarterly·Gerrit KoopTine van Werven
Jan 9, 2014·New Zealand Veterinary Journal·S McDougallCg Prosser
Sep 22, 2010·Journal of Dairy Science·S McDougallC Prosser
May 21, 2005·Journal of Dairy Science·P J BoettcherD Gianola
Jan 30, 2008·The Journal of Dairy Research·Georgios ChristodoulopoulosSpyridon K Kritas
Nov 16, 2019·Preventive Veterinary Medicine·Véronique Bernier GosselinJohn R Middleton

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