A Statistical Appraisal of the Results of Metabolic Profile Tests on 75 Dairy Herds

Payne, J. M.; Rowlands, G.J.; Manston, R.; Dew, Sally M.

doi:10.1016/s0007-1935(17)36441-2

Cited by 86 publications

(48 citation statements)

References 13 publications

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“…In a survey of 75 dairy herds, mean concentrations of glucose were found to be low in six of 20 herds with poor fertility (Payne et al 1973). Allen et al (1977) analysed data from this survey in more detail, and found that the percentage return to first service increased from 34% in 11 herds with glucose concentrations within one standard deviation of the normal mean to 57 % in five herds with concentrations two standard deviations or more below the normal mean.…”

Section: Glucosementioning

confidence: 99%

Changes in albumin, globulin, glucose and cholesterol concentrations in the blood of dairy cows in late pregnancy and early lactation and relationships with subsequent fertility

et al. 1980

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Weekly blood samples were collected from 42 Friesian cows between 5 weeks before and 10 weeks after calving, and analysed for serum cholesterol, albumin, total protein, glutamate-dehydrogenase, sorbitol-dehydrogenase and ornithine-carbamyl-transferase and blood glucose.Cholesterol concentrations increased 2^-fold during the first 8 weeks of lactation. There was also a transient decrease in glucose concentration at calving, but there was no relationship between conception rate and the concentrations of these two constituents.Albumin concentrations decreased at calving in some but not all cows and remained low for up to 2 weeks. Average concentrations of albumin determined by two analytical methods, a HABA dye-binding and a single radial diffusion assay method, were significantly lower (P < 0-05) between 0 and 2 weeks post-partum in eight cows which required four or more services than in 32 cows which conceived after fewer services. Similarly, the average decrease in concentration over calving was greater in those cows which conceived only after four or more services (P < 001).Globulin concentrations (total protein minus albumin) decreased during the 5 weeks before, and increased in the 3 weeks following calving. The net change over calving was significantly related to conception rate, and the albumin/globulin ratio was reduced (P < 0-001) in the eight cows requiring four or more services.Activities of all three enzymes doubled after calving, but there was no correlation between these increases and the decreases in albumin concentration, suggesting that, if liver insufficiency is a factor, it is probably due to malfunction rather than tissue damage. o r c l o s e t o calving, and have shown that concentrations may not return to pre-calving values until In a study of 351 dairy cows sampled between 2 or 3 months later. Little (1974) showed that the 40 and 100 days post-calving, Rowlands, Little & decrease does not occur in all cows, and concluded Kitchenham (1977) found a negative association that those affected synthesized less albumin. The between serum albumin concentration and both cows in which albumin concentrations decrease milk yield and the number of services required for least at calving, or recover most quickly, are likely conception.to be those with the highest concentrations in early Several authors (Hojovcova, 1966;Little, 1974; lactation. Manston et al. 1975;Rowlands et al. 1975; Szulc, The objectives of the study described Treacher et al. 1976) have noted decreases paper were to ascertain the degree to which indiin serum albumin concentration in dairy cows at vidual cows show such characteristic changes in • Present address: Nuffield Department of Clinical albumin concentration, to test the hypothesis Medicine, John Radcliffe Hospital, Oxford.(Rowlands, 1978) that cows which are better able

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Section: Glucosementioning

confidence: 99%

Changes in albumin, globulin, glucose and cholesterol concentrations in the blood of dairy cows in late pregnancy and early lactation and relationships with subsequent fertility

et al. 1980

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“…A high incidence of milk fever or parturient hypocalcaemia has been reported in dairy herds in which the supply of magnesium (Mg) was insufficient during the dry period (14,24). Research concerning the effects of a low Mg supply on calcium (Ca) mobilisation of cows has shown that hypomagnesaemic cows had lower Ca mobilisation rates in response to hypocalcaemia induced by the intravenous infusion of disodium ethylenediaminetetra-acetate (Na2EDTA) than normomagnesaemic cows (4,7,30).…”

Section: Introductionmentioning

confidence: 99%

Effects of a deficient magnesium supply during the dry period on bone turnover of dairy cows at parturition

Mosel

Klooster

Wouterse

1991

Veterinary Quarterly

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SUMMARY. The bone activity and bone mineral content in rib bones resected from 33 dairy cows between 3 and 8 h after parturition were measured, and the effects upon them of a deficient supply of dietary magnesium (Mg) during the last seven weeks of pregnancy were studied. The cows were fed a diet containing either 0.22% magnesium (low Mg) or 0.82% magnesium (high Mg) in the dry matter (DM), and the potassium content of both rations was increased to approximately 4.1% in the DM to reduce the absorption of magnesium. In the cows fed the low-Mg diet a fall in plasma Mg concentration was observed In the low-Mg, low-parity cows the plasma Mg concentrations at parturition were higher than in the low-Mg, high-parity cows, i.e. 0.83 mmol/l and 0.54 mmo1/1, respectively. After parturition four cows in the lowMg, high-parity group showed clinical signs of hypocalcaemia but none of the other groups did so. The bone formation in low-parity cows was significantly (P < 0.05) affected by Mg supply, with higher percentages of both trabecular surface covered by osteoid and osteoid volume in the low-Mg group. In the high-parity cows no significant differences in bone formation were found between the low-and high-Mg groups. An inadequate Mg supply resulted in a significantly (P < 0.05) higher Ca content in the bone ash of low-parity cows and a significantly (P < 0.05) higher bone ash percentage in the bone of high-parity cows.

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“…Blood urea nitrogen levels have been shown to reflect the current level of protein intake (Preston et al, 1965;Prewitt et al, 1971;Manston et al, 1975) and therefore of feed intake. An increase in dietary protein raises BUN levels (van Horn et al, 1969;Polan et al, 1970;Adams et al, !978), whereas low protein diets are reflected in low blood urea levels (Payne et al, 1973;Rowlands et al, 1975). Martin et al (1962) found in small experiments that voluntary feed intake was significantly reduced when magnesium deficient diets were fed to ruminants and that the reduction in appetite followed a pattern similar to the in vitro decrease in cellulose digestion by rumen inocula derived from the magnesiumdeprived animals.…”

Section: Discussionmentioning

confidence: 99%

Marginal magnesium deficiency as a possible cause of reduced voluntary feed intake in commercially managed dairy cows

et al. 1980

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A Statistical Appraisal of the Results of Metabolic Profile Tests on 75 Dairy Herds

Cited by 86 publications

References 13 publications

Changes in albumin, globulin, glucose and cholesterol concentrations in the blood of dairy cows in late pregnancy and early lactation and relationships with subsequent fertility

Changes in albumin, globulin, glucose and cholesterol concentrations in the blood of dairy cows in late pregnancy and early lactation and relationships with subsequent fertility

Effects of a deficient magnesium supply during the dry period on bone turnover of dairy cows at parturition

Marginal magnesium deficiency as a possible cause of reduced voluntary feed intake in commercially managed dairy cows

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