About: Risk factors for bobby calf mortality across the New Zealand dairy supply chain

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An Entity of Type : schema:ScholarlyArticle, within Data Space : covidontheweb.inria.fr associated with source document(s)

Attributes	Values
type	Academic Article research paper schema:ScholarlyArticle
isDefinedBy	Covid-on-the-Web dataset
has title	Risk factors for bobby calf mortality across the New Zealand dairy supply chain
Creator	Cogger, Naomi Palmer, Anna Webster, Jim Beausoleil, Ngaio Boulton, Alana Johnson, Craig Kells, Nikki O'connor, Cheryl
topic	covid:d7ff69edc7eb8d1fc0e31314b8a4434a50a31134#this
Source	Elsevier; Medline; PMC
abstract	Abstract The objective of this study was to identify risk factors for morbidity and mortality of bobby calves across the whole dairy supply chain in New Zealand. A case-control study was carried out in the 2016 spring calving season. A total of 194 bobby calves, comprising 38 cases (calves that died or were condemned for health or welfare reasons before the point of slaughter) and 156 controls (calves deemed acceptable and presented for slaughter) were included in the study. Case and control calves were selected by veterinarians located at 29 processing premises across New Zealand. Information regarding management of selected calves on-farm, during transport and at the processor was obtained retrospectively via questionnaires administered to supplying farmers, transport operators and processing premises personnel. Associations between management variables and calf mortality (death or condemnation) were examined using multivariable logistic regression models. Factors associated with an increased risk of calf mortality included time in the farm of origin’s calving season, duration of travel from farm to the processor and processing slaughter schedule (same day or next day). Every additional week into the farm’s calving season increased the odds of mortality by a factor of 1.2 (95%CI 1.06, 1.35). Similarly, each additional hour of travel time increased the odds of mortality by a factor of 1.45 (95% CI 1.18, 1.76). Risk of mortality was significantly greater for calves processed at premises with a next day slaughter schedule than those processed at premises with a same day slaughter schedule (OR 3.82, 95% CI 1.51, 9.67). However, when the data set was limited to those cases that died or were condemned in the yards (i.e. excluding calves that were dead or condemned on arrival) the effect of same day slaughter was not significant. In order to reduce bobby calf mortality and morbidity, transport duration should be kept as short as possible and a same day slaughter schedule applied. While these factors can be regulated, New Zealand’s pastoral dairy system means that calves will inevitably be transported for slaughter across several months each spring. Although farm management factors did not apparently influence the risk of mortality in this study, the effect of time in farm’s calving season suggests there may be farm-management related factors that change over the season. This requires further investigation.
has issue date	2020-01-31(xsd:dateTime)
bibo:doi	10.1016/j.prevetmed.2019.104836
bibo:pmid	31765960
has license	els-covid
sha1sum (hex)	d7ff69edc7eb8d1fc0e31314b8a4434a50a31134
schema:url	https://doi.org/10.1016/j.prevetmed.2019.104836
resource representing a document's title	Risk factors for bobby calf mortality across the New Zealand dairy supply chain
has PubMed Central identifier	PMC7127677
has PubMed identifier	31765960
schema:publication	Preventive Veterinary Medicine
resource representing a document's body	covid:d7ff69edc7eb8d1fc0e31314b8a4434a50a31134#body_text
is http://vocab.deri.ie/void#inDataset of	https://covidontheweb.inria.fr:4443/about/id/http/ns.inria.fr/covid19/d7ff69edc7eb8d1fc0e31314b8a4434a50a31134
is schema:about of	named entity 'SUPPLY' named entity 'MORTALITY' named entity 'calf' named entity 'calf' named entity 'Although' named entity 'condemned' named entity 'mortality' named entity 'acceptable' named entity 'control' named entity 'dead' named entity 'bobby' named entity 'calves' named entity 'dairy' named entity 'CONTROLS' named entity 'INFLUENCE' named entity 'SHORT' named entity 'TRAVEL' named entity 'INCREASED' named entity 'SPRING' named entity 'WELFARE' named entity 'MONTHS' named entity 'REASONS' named entity 'TRANSPORT' named entity 'TIME' named entity 'ARRIVAL' named entity 'CASE' named entity '1.2' named entity 'WEEK' named entity 'MEANS' named entity 'POINT' named entity 'CALF' named entity 'NEW ZEALAND' named entity 'ACROSS' named entity 'THESE' named entity 'ASSOCIATIONS' named entity 'SYSTEM' named entity 'PROCESSOR' named entity 'APPLIED' named entity 'SLAUGHTER' named entity 'CHANGE' named entity 'LIMITED' named entity 'PRESENTED' named entity 'YARDS' named entity '1.35' named entity 'CALVES' named entity 'MORBIDITY' named entity 'LOGISTIC REGRESSION MODELS' named entity 'CALF' named entity 'INFORMATION' named entity 'EXAMINED' named entity 'MORTALITY' named entity 'RISK FACTORS' named entity 'TO REDUCE' named entity 'RELATED' named entity 'ADDITIONAL' named entity 'VETERINARIANS' named entity 'ASSOCIATED WITH' named entity 'DURING TRANSPORT' named entity 'INCREASED RISK' named entity 'USING' named entity 'FARM MANAGEMENT' named entity 'ORIGIN' named entity 'POSSIBLE' named entity 'CASE-CONTROL STUDY' named entity 'TOTAL' named entity 'RISK FACTORS' named entity 'HOUR' named entity 'DID' named entity 'SCHEDULE' named entity 'A FACTOR' named entity 'FARMERS' named entity 'MANAGEMENT'

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