Necropsy

Roberts, John F.

doi:10.1016/b978-1-4377-2353-3.10020-4

Cited by 1 publication

(1 citation statement)

References 11 publications

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“…During the lambing monitoring period, all identified dead ewes had a field necropsy undertaken to identify the most probable cause of death [30,31]. Biopsies, tissue, and blood samples were not collected for further pathology analysis due to the remote location of the farm and, therefore, the cause of death was based solely on the gross field autopsy and daily observations of the flock.…”

Section: Post Mortem Examinationmentioning

confidence: 99%

Factors Associated with Ewe Death and Casting in an Extensively Farmed Sheep Flock in New Zealand

et al. 2021

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Ewe deaths affect the productivity and profitability in sheep farming systems and have potential animal welfare and market perception implications. Internationally, there is scant data on the timing and causes of ewe deaths in extensive grazing systems. There is no published literature on the incidence and risk factors associated with casting (ewe in late gestation accidentally immobilised, often in dorsal recumbency). This study, undertaken using a cohort of 1789 ewes on a New Zealand farm, reports on the timing and risk factors associated with production parameters for ewe deaths through an almost two-year period, along with causes of death during both peripartum periods. Ewe deaths occurred throughout both years but were most frequent during the peripartum (pre-lambing to mid-lactation) period. Casting was the most commonly identified cause of death in both years, responsible for approximately a quarter to a third of potential annual mortality. Few risk factors for death or casting were identified. In conclusion, the peripartum period is a high-risk time period for ewe deaths (and, by extension, will also contribute to lamb perinatal mortality). In extensively grazed flocks where casting events occur, it is recommended that all ewes are monitored daily during the peripartum period.

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Section: Post Mortem Examinationmentioning

confidence: 99%