Results 221 to 230 of about 71,681 (266)
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Embryo development in dairy cattle
Theriogenology, 2016During the past 50 years, the fertility of high-producing lactating dairy cows has decreased, associated with intensive selection for increased milk production. The physiological and metabolic changes associated with high milk production, including decreased (glucose, insulin, IGF-I) or increased (nonesterified fatty acids, ketone bodies ...
Pat Lonergan +3 more
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The detection of oestrus in dairy cattle
Veterinary Record, 1976A survey attempted to determine the extent to which cows are being inseminated when not in oestrus. The method used to check the farmers' diagnoses of oestrus was based on peripheral plasma progesterone concentrations analysed by radioimmunoassay. Of 141 cows examined in this way, a total of 30 (21-28 per cent) showed abnormalities of the progesterone ...
W T, Appleyard, B, Cook
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Postpartum anestrus in dairy cattle
Theriogenology, 2009Fertility of the postpartum period is negatively influenced by the incidence of anestrus. The latter condition is characterized by the absence of estrous behavior, which may be an indication of suboptimal conditions (e.g., inadequate peripartum nutrition) or pathologic conditions (e.g., chronic debilitating diseases or uterine and ovarian diseases ...
Peter, AT, Vos, P.L.A.M., Ambrose, D.
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Pendular nystagmus in dairy cattle
Journal of the American Veterinary Medical Association, 1983SUMMARY In a survey of 2,932 mature dairy cattle performed over a 1-month period, we found 15 with rapid oscillation in 1 or both eyes. Nystagmus had been present since shortly after birth in 2 animals, and the age at onset was unknown in the others. The nystagmus was not associated with any other physical or neurologic problem.
J M, McConnon +4 more
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An outbreak of sarcocystosis in dairy cattle
Australian Veterinary Journal, 1986SUMMARY Sixteen of 32 Friesian calves, 8 to 10 weeks old, died over 4 weeks. The calves were housed in pens previously used by dogs. Clinical signs included anorexia, pale mucous membranes, rapid weight loss, coughing and palpably enlarged superficial lymph nodes.
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Digital dermatitis in dairy cattle
Veterinary Record, 1988A condition of digital dermatitis causing lameness in a dairy herd is described. The lesion was a small circumscribed area of epidermal inflammation in the skin immediately above the coronet between the bulbs of the heel. Topical treatment, consisting of excoriation and application of a gentian violet and tetracycline aerosol spray, was effective ...
R W, Blowey, M W, Sharp
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“Subclinical” laminitis in dairy cattle
New Zealand Veterinary Journal, 1992In dairying countries worldwide, the economic importance of lameness in cattle is now recognised. Laminitis is regarded as a major predisposing factor in lameness caused by claw disorders such as white zone lesions, sole ulcer, and heel horn erosion.
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Bovine Immunology: Implications for Dairy Cattle
Frontiers in Immunology, 2021Anastasia Vlasova, Linda Saif
exaly