A study of mortality among suckler and dairy cows in Northern Ireland in 1992

Menzies, F. D.; Bryson, D.G.; McCallion, T.; Matthews, D.I.

doi:10.1136/vr.137.21.531

Cited by 45 publications

(35 citation statements)

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“…Previous studies have identified that an increased proportion of purchased cows Raboisson et al, 2011), no pasture-grazing Burow et al, 2011;Dechow et al, 2011), larger herd sizes (Nørgaard et al, 1999;Smith et al, 2000;Raboisson et al, 2011) and lower herd average milk yield (Smith et al, 2000;, are all factors associated with increased MR. In contrast, Menzies et al (1995) did not find any effect of herd size on mortality and Miller et al (2008) found a small but consistent decrease in death frequency as herd size increased. Also, Nørgaard et al (1999) found an increase in mortality with increasing average milk yield.…”

Section: Introductionmentioning

confidence: 58%

Herd-level risk factors associated with cow mortality in Swedish dairy herds

Alvåsen

Mörk

Sandgren

et al. 2012

Journal of Dairy Science

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An increase in on-farm mortality (euthanasia and death) in dairy herds has been reported in several countries in the last decade. This does not only imply possible problems with animal welfare, but it also causes economic losses to the farmer. The objective of this study was to evaluate time trends in on-farm dairy cow mortality in Sweden and identify potential herd-level risk factors. Data was retrieved on all Swedish dairy herds enrolled in the milk recording scheme between 2002 and 2010. Herds with a herd size of < 20 cows or a mortality rate (MR) of > 40 dead or euthanized cows per 100 cow-years were excluded. Two different models were used: 1 multiple year analysis which included 6,898 herds during the period 2002 to 2010 and 1 single year analysis including 4,252 herds for the year 2010, where other variables that were not present during the entire multiple year study were analyzed. The outcome variable was the number of euthanized and dead cows per year and season. A negative binomial regression model, adjusted for clustering within herd, was applied to both models. Fixed effects in the multiple year analysis were breed, calving interval, herd size, milk yield, region, season, pasture period, and year. The fixed effects in the single year analysis were breed, calving interval, conventional vs. organic farming, herd size, housing system, milk yield, region, and season. The multiple year analysis demonstrated that MR gradually increased from 5.1 to 6.6 events per 100 cow-years during the study period. Swedish MR are consequently on par with, or even greater than, MR among dairy herds in other comparable countries. Higher mortality was associated with larger herd size, longer calving intervals, and herds that had Swedish Holstein as the predominant breed. Lower mortality was observed in herds with a higher herd average milk yield, during the fall and winter, and in organically managed herds. There were regional differences in mortality. An interaction between herd size and season was found in both models. Also, an interaction between housing system and milk yield was found in the single year analysis. This first assessment of on-farm mortality in Swedish dairy herds confirmed that the MR has increased over the last few years. The study also identified some herd-level risk factors.

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Section: Introductionmentioning

confidence: 58%

Herd-level risk factors associated with cow mortality in Swedish dairy herds

Alvåsen

Mörk

Sandgren

et al. 2012

Journal of Dairy Science

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“…In this review, the interval between sampling and receipt at the laboratory had no effect, possibly because of the small number of eye fluid samples received more than 48 hours after sampling and the difficulty with which a laboratory diagnosis of hypomagnesaemia can be made from eye fluid samples alone. Hypomagnesaemia was the most common diagnosis from the beef submissions; similarly, Menzies and others (1995) found that hypomagnesaemia was the main cause of death of suckler cows in Northern Ireland.…”

Section: Discussionmentioning

confidence: 93%

Review of diagnostic laboratory submissions of adult cattle ‘found dead’ in England and Wales in 2004

Watson¹,

David

Cook

2008

Veterinary Record

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A total of 253 submissions from adult cattle 'found dead' in England and Wales were referred to the Veterinary Laboratories Agency in 2004. Carcases accounted for 54 per cent of the submissions and were of more diagnostic value than other types of sample. Whether the animals were beef or dairy, their distance from the laboratory and the number of deaths in the incident affected the likelihood of samples being submitted. The probability of reaching a diagnosis was influenced by the type of sample, the level of testing and the interval from sampling to receipt in the laboratory. Systemic disease was the most frequent cause of death in both dairy and beef cattle with hypomagnesaemia being the most frequent diagnosis (52 per cent) in beef cattle. In dairy cattle, 34 per cent of the diagnoses were for sporadic events, including haemorrhage and torsions of the digestive and reproductive tracts.

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“…Dessa forma, é de suma importância estabelecer a prevalência das doenças causadoras de morte em rebanhos leiteiros de diferentes regiões, a fim de diminuir situações de risco e nortear a tomada de medidas profiláticas . Vários estudos sobre causas de mortes de vacas leiteiras foram realizados em diferentes países; contudo, a grande maioria determinou a causa da morte baseada em questionários submetidos aos proprietários ou veteriná-rios clínicos (Menzies et al 1995, Esslemont & Kossaibati 1997, Thomsen et al 2004. Estudos que avaliaram a causa da morte de vacas leiteiras através de exame de necropsia, como no presente trabalho são escassos (McConnell et al 2009, McConnell et al 2010, Thomsen et al 2012.…”

Section: Discussão E Conclusõesunclassified

Causas de morte em vacas leiteiras no Rio Grande do Sul

et al. 2017

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RESUMO. -As causas de morte em vacas leiteiras no Rio Grande do Sul foram analisadas através de um estudo retrospectivo dos protocolos de necropsia de 600 vacas leiteiras examinadas entre os anos de 1998-2012. Do total de vacas analisadas 67,5% eram oriundas da Região Metropolitana de Porto Alegre, seguida das Regiões Nordeste Rio-Grandense 12,4% e Centro Oriental Rio-Grandense 10,4%. Quanto às raças, 76,5% eram holandesas, 9,8% Jersey e 13,7% misturas dessas raças. O diagnóstico definitivo foi possível em 85,8% dos casos. A categoria de doenças inflamatórias e parasitárias foi a principal causa de morte com 48,2% dos casos conclusivos, seguida por neoplasias (17,5%), doenças tóxicas e toxi-infecções (15,9%), doenças nutricionais e metabólicas (8,5%), doenças causadas por agentes físicos (7,4%) e outras doenças (2,5%). As principais enfermidades diagnosticadas em cada categoria foram: tristeza parasitária bovina (120 casos), linfoma (77 casos), intoxicação por Senecio spp. (23 casos), retículo pericardite traumática (19 casos), cetose e timpanismo (11 casos cada uma) e fulguração (5 casos). TERMOS DE INDEXAÇÃO: Doenças de bovinos, vacas leiteiras, estudo retrospectivo, patologia, Rio Grande do Sul.

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A study of mortality among suckler and dairy cows in Northern Ireland in 1992

Cited by 45 publications

References 0 publications

Herd-level risk factors associated with cow mortality in Swedish dairy herds

Herd-level risk factors associated with cow mortality in Swedish dairy herds

Review of diagnostic laboratory submissions of adult cattle ‘found dead’ in England and Wales in 2004

Causas de morte em vacas leiteiras no Rio Grande do Sul

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