The relationship of calfhood morbidity with survival after calving in 25 New York Holstein herds

Warnick, L. D.; Hn, Erb; White, ME

doi:10.1016/s0167-5877(96)01105-1

Cited by 27 publications

(19 citation statements)

References 14 publications

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“…1994). However, in a study of productive lifespan in the same animals, we did not find any effects of calfhood disease on the risk of culling (Hultgren J et al., unpublished data) and Warnick et al. (1997) also failed to detect an association with survival after calving.…”

Section: Discussionmentioning

confidence: 52%

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Calving Interval in Dairy Cows in Relation to Heifer Rearing Conditions in Southwest Sweden

Hultgren

Svensson

2010

Reprod Domestic Animals

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Sustained reproductive performance throughout the life of domestic animals can be suspected to require successful rearing of replacements. We studied associations between replacement heifer rearing conditions and reproductive performance throughout the productive life of dairy cows in southwest Sweden by linear mixed modelling. Data consisted of 3542 lactations in 1550 Swedish Reds, Swedish Holsteins or dairy cows of other or mixed breeds, representing all female animals born during 1998 in 107 herds. Median calving interval (CI) was 381, 380 and 377 days in parities 1, 2 and > or =3, respectively. Median observed productive lifetime was 27 months. The applied model included effects of cow housing system, breed, parity, respiratory disease before 3 months of age, whether oestrous detection was performed only at feeding, oestrous-detection ability, calving year, post-calving reproductive disease in a given lactation, milk yield 30 days post-calving relative to the herd mean, the interaction of breed by calfhood respiratory disease and random effects of cow and herd. Severe respiratory disease before 3 months of age in Swedish Red cows was associated with an increase in CI by 12%. Of the total variation in CI, 9.5% was due to herd factors and 12% to cow factors, as opposed to variation between lactations.

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Section: Discussionmentioning

confidence: 52%

“…1993), a reduced chance of calving and entering the milking herd (Correa et al. 1988; Warnick et al. 1997) and dystocia (Warnick et al.…”

Section: Discussionmentioning

confidence: 99%

Calving Interval in Dairy Cows in Relation to Heifer Rearing Conditions in Southwest Sweden

Hultgren

Svensson

2010

Reprod Domestic Animals

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“…Delayed diagnosis results in prolonged use of antibiotics, a high recurrence rate, the development of refractory sequelae, such as pulmonary abscessation, ear infections, and endemic herd problems. Dairy calf and heifer pneumonia has serious economic consequences because subclinical, clinical, and chronic pneumonia of calves has a negative impact on growth, reproductive performance, milk production, and longevity [33][34][35]. Pneumonia is typically viewed as a postweaning problem of dairy heifers but preweaned calves are frequently affected [36,37] and are the source of pneumonia outbreaks in group pens.…”

Section: Solving Respiratory Disease Problems Of Calves and Heifersmentioning

confidence: 99%

Disease Management of Dairy Calves and Heifers

McGuirk

2008

Veterinary Clinics of North America: Food Animal Practice

430

501

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This article focuses on the most important diseases of dairy calves and heifers and presents clinical approaches that can improve detection, diagnosis, and treatment of herd-based problems. A systematic herd investigation strategy is pivotal to define the problems, understand important risk factors, develop a plan, and make recommendations for disease management accurately. A review of records, colostrum and feeding routines, housing and bedding management, routine procedures, vaccination, and treatment protocols begins the investigation and determines which diagnostic procedures and testing strategies are most useful. Disease management is most effective when the problem source is well defined and the exposure can be limited, calf immunity can be enhanced, or a combination of both. Screening examinations performed regularly or done at strategic time points improves detection of disease, can be used to monitor treatment outcomes, and can avoid disease outbreaks.

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“…In a study involving 787 Holstein cows, Warnick et al [49] found that occurrence of dullness, respiratory health disorder or scour within the first 90 days of life had no impact on length of productive life, as defined in paragraph 2.2.…”

Section: Time Of Occurrence Of Health Disorders During Life and Cullingmentioning

confidence: 99%

Effect of health disorders on culling in dairy cows: a review and a critical discussion

et al. 2000

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-Risk of culling consequent to the main health disorders occurring in the current production systems is reviewed. Survival analysis including health disorders as time-dependent variables is considered to be the most appropriate method to assess their effects because they allow a better description of the exact follow-up of disease history. Farmers preferentially consider health events in the current lactation and/or those occurring in early stages of lactation for making culling decisions. The unfavourable direct effects on culling of dystocia and udder disorders (mastitis and teat injuries) are clearly demonstrated, whereas there are variations between studies on the association between metabolic and reproductive disorders and culling. These variations may be due to differences in study designs, populations involved and methods. Consequences, in terms of estimated effect of health disorders, of methodological choices (e.g. whether or not including in the models descriptors for milk yield and/or reproductive performance) are discussed. Metabolic and reproductive disorders may act indirectly through a subsequent decrease in milk yield and reproductive performance. The impact of health disorders on longevity is on average weak, compared to the impact of low milk yield potential and poor reproductive performance. Herd characteristics (availability of heifers, quota, farmer's attitude towards risk and uncertainty...) modify the risk for a cow to be culled for a given health disorder. Aims of further studies could be (1) to interpret the meaning and to analyse the reliability of culling reasons information, (2) to evaluate the relative effect on culling of health disorders and performance (milk yield and reproduction) in different parities, (3) to investigate the role of components of the herd effect on the risk of culling. dairy cow / culling / health disorders / risk factors / survival analysis Résumé -Risque de réforme associé à la survenue de troubles de santé chez la vache laitière : revue et discussion critique. La revue porte sur le risque de réforme consécutif à la survenue des principaux troubles de santé dans les systèmes de production actuels. Pour estimer ce risque, les modèles Ann. Zootech. 49 (2000) 293-311 293

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The relationship of calfhood morbidity with survival after calving in 25 New York Holstein herds

Cited by 27 publications

References 14 publications

Calving Interval in Dairy Cows in Relation to Heifer Rearing Conditions in Southwest Sweden

Calving Interval in Dairy Cows in Relation to Heifer Rearing Conditions in Southwest Sweden

Disease Management of Dairy Calves and Heifers

Effect of health disorders on culling in dairy cows: a review and a critical discussion

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