Risk factors associated with milk fever occurrence in grazing dairy cattle
نویسندگان
چکیده
منابع مشابه
Risk factors and milk yield losses associated with lameness in Holstein-Friesian dairy cattle.
Weekly locomotion scores on a scale of 1 to 5 were used to investigate the relationship between cattle lameness, management systems and the impact of lameness on milk production. The data were 14026 locomotion scores from 248 Holstein-Friesian cows. Cows were managed in two groups, XE (high-concentrate feed and housed indoors all year) and XM (low-concentrate feed and outdoors in summer). Analy...
متن کاملRisk factors associated with hemorrhagic bowel syndrome in dairy cattle.
OBJECTIVE To determine risk factors associated with hemorrhagic bowel syndrome (HBS) among dairy cattle in the United States and identify characteristics of HBS in individual cows. DESIGN Cross-sectional, population-based survey. SAMPLE POPULATION A stratified random sample of 1,013 dairy operations with > or = 30 cows located in 21 states. PROCEDURE Information on management and animal h...
متن کاملFactors associated with lameness in dairy cattle
An intervention trial by Hedges and others (2001) studying 1109 cow-years, in which every lame cow was examined and recorded by a veterinary surgeon, determined the four main causes of lameness to be sole ulcers, white line disease, digital dermatitis and interdigital necrobacillosis (‘foul’ or ‘foot rot’) (see graph on the right). Sole ulcers and white line disease are defects of the hoof and,...
متن کاملColostrum and milk as risk factors for infection with Mycobacterium avium subspecies paratuberculosis in dairy cattle.
Mycobacterium avium ssp. paratuberculosis (MAP) infections cause major losses to the dairy industry. Transmission of MAP occurs primarily via feces and in utero, but MAP can also be excreted in colostrum and milk. The objective of this study was to determine whether colostrum and milk fed to calves are important risk factors for infection with MAP. A questionnaire was sent to 1,050 farms partic...
متن کاملPrevalence and risk factors for Coxiella burnetii (Q fever) in Dutch dairy cattle herds based on bulk tank milk testing.
Despite cattle herds can harbor Coxiella burnetii, risk factors for C. burnetii presence in dairy cattle herds are largely unknown. Therefore, C. burnetii herd prevalence and risk factors for bulk tank milk (BTM) positivity were investigated. In this cross-sectional study, a questionnaire was filled out by the farmer and BTM from 301 farms was tested by ELISA for presence of C. burnetii antibod...
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ژورنال
عنوان ژورنال: Journal of Dairy Science
سال: 2017
ISSN: 0022-0302
DOI: 10.3168/jds.2017-13065