Influence of Clinical Mastitis During Early Lactation on Reproductive Performance of Jersey Cows

Barker, A.; Schrick, F. N.; Lewis, Marion; Dowlen, H.H.; Oliver, S. P.

doi:10.3168/jds.s0022-0302(98)75690-5

Cited by 140 publications

(164 citation statements)

References 15 publications

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“…These are not limited to the interval to first ovulation, the presence of a corpus luteum, circulating hormones, follicular growth, oestrus expression, ovarian diseases, early embryonic development and sperm and oocyte health (Kelton et al 2001;Lucy 2001). However, mastitis has been shown to have a negative effect on reproduction in dairy cattle (Barker et al 1998;Huszenicza et al 1998;Oliver et al 2000;Schrick et al 2001;Santos et al 2004;Huszenicza et al 2005).…”

Section: Discussionmentioning

confidence: 99%

Effects of Clinical Mastitis on Reproductive Performance in Holstein Cows

Günay

2008

Acta Vet. Brno

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Gunay A., U. Gunay: Effects of Clinical Mastitis on Reproductive Performance in Holstein Cows. Acta Vet. Brno 2008, 77: 555-560.The objective of this study was to determine the effects of clinical mastitis on reproductive performance in 135 early lactation cows. The animals were divided into two groups according to the occurrence of mastitis as follows: group I (n = 45), clinical mastitis prior to the first artificial insemination breeding; group II (n = 45), clinical mastitis after artificial insemination and being diagnosed pregnant. Forty-five cows without any mastitis served as control group.Calving to first service intervals were significantly longer (P < 0.05) in cows with clinical mastitis before first service (group I; 95.2 ± 5.4 d) than in cows with clinical mastitis after first service (group II; 77.4 ± 8.2 d) and in control cows (75.9 ± 6.3 d). Calving to conception interval with clinical mastitis before first service (119

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Section: Discussionmentioning

confidence: 99%

Effects of Clinical Mastitis on Reproductive Performance in Holstein Cows

Günay

2008

Acta Vet. Brno

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“…It has been demonstrated that around calving some impairment of immune defences can be observed [8,12]. This impairment increases the frequency of reproductive, production and udder diseases, as shown experimentally and under field conditions [1,4,5,7,29].…”

Section: Introductionmentioning

confidence: 98%

Comparison of blood and milk non-specific immune parameters in heifers after calving in relation to udder health

et al. 2005

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-A practical protocol to study udder immune status in field conditions was planned with the aim to assess different non-specific immune parameters in milk samples from dairy heifers during the periparturient period. Five herds located in northern Italy were selected and overall 39 heifers were enrolled in the trial. Milk samples were taken at 7, 14, 21, 28, 45, 60, and 75 days after calving. The parameters assessed were N-acetyl-β-glucosaminidase (NAGase), lysozyme, respiratory burst (RB), somatic cell counts (SCC) and serum protein profile. SCC and NAGase were higher in the first sampling after calving, while lysozyme showed large variations during the observation period without a definite trend. The levels of RB observed in the first two weeks after calving, even if lower, were not statistically different from the values observed in samples taken over the following weeks. This study confirmed that the levels of immune components in milk are different from what is observed at blood level in the same cow. A significant decrease in RB in milk polymorphonuclear leukocytes (PMN) post-calving was not observed; milk PMN from healthy cows showed low RB levels, while the values from infected quarters were significantly higher. Significant differences between healthy and infected animals were also observed for milk NAG, lactoglobulin and albumin. These data suggest that udder immune response could be influenced both by the cow immune status and by external factors such as pathogens and management. Therefore, the reduction in immune defences, particularly in heifers, is not unavoidable and methods to boost PMN activity should be explored.heifers / periparturient period / blood milk / non-specific immunity

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“…It has been demonstrated that in this period and, particularly around calving, some impairment of immune defences could be observed [19,22]. This impairment increases the frequency of reproductive and production diseases as recently reviewed by [17], and of clinical mastitis as shown experimentally [5,10], and in field conditions [13,35], as reviewed recently [8]. Indeed, for different reasons evaluating the cow's immune status in the field is difficult.…”

Section: Introductionmentioning

confidence: 99%

The evaluation of non-specific immune status of heifers in field conditions during the periparturient period

et al. 2004

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-During the periparturient period, some impairment of immune defences were observed. Reference values for the different non-specific immune parameters in cows are not generally available, thus limiting the application of these parameters in dairy practice. This paper reports the data on the measurements of different parameters in the blood, and explores the possible influence of the herd on the non-specific immune status of the cow. Five herds located in Northern Italy were selected and overall 39 heifers were enrolled in the trial. Blood samples were taken 14 and 7 days before the expected date of calving, then at 7, 14, 21, 28, 45, 60, and 75 days after calving. The parameters assessed were N-acetyl-β-glucosaminidase (NAGase), lysozyme, nitric oxide, superoxide dismutase, haptoglobin, respiratory burst, and serum protein profile. After calving, a significant decrease of respiratory burst and nitric oxide concentration were observed in comparison with the pre-calving values but not with the post-calving samplings. Total proteins, β-and γ-globulins showed a progressive and significant increase in concentration after calving, in comparison with pre-calving values. The results of the study confirmed that a decrease of immune functions can be observed in commercial dairy herds in the first four weeks after calving. The amplitude of this phenomenon is not common to all animals and all herds, suggesting the possibility to reduce the impairment by improved management and genetic selection. heifers / periparturient period / blood / non-specific immunity

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Influence of Clinical Mastitis During Early Lactation on Reproductive Performance of Jersey Cows

Cited by 140 publications

References 15 publications

Effects of Clinical Mastitis on Reproductive Performance in Holstein Cows

Effects of Clinical Mastitis on Reproductive Performance in Holstein Cows

Comparison of blood and milk non-specific immune parameters in heifers after calving in relation to udder health

The evaluation of non-specific immune status of heifers in field conditions during the periparturient period

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