Journal article
Neospora caninum seroprevalence and associated risk factors in beef cattle in the northwestern United States
Veterinary parasitology, Vol.90(1), pp.15-24
2000
Handle:
https://hdl.handle.net/2376/109519
PMID: 10828508
Abstract
A
Neospora caninum seroprevalence and risk factor survey of 2585 cows was conducted in 55 beef cow–calf herds located in five northwestern states of the USA. Blood samples were collected by private veterinary practitioners and management practices were surveyed using a mail questionnaire. Producers were randomly selected from those that employed these veterinarians to perform annual herd pregnancy examinations. Questions were asked about animal management, grazing and feeding, immunization and record keeping practices. Blood was collected from a systematically selected sample of cows in each herd, and age, origin, and pregnancy status were recorded. Blood samples were analyzed for antibodies against
N. caninum antigen using a monoclonal antibody-based competitive inhibition (CI) ELISA. Overall seroprevalence was 24% and within herd seroprevalence ranged from 3 to 67% with a median of 19%. Within herd seroprevalence and mean inhibition percentage were different between the five states. Herds that managed their cows on range for summer grazing had lower seroprevalence than those that did not, while increased seroprevalence was associated with higher winter stocking density. Cows less than 3 years of age had higher CI ELISA inhibition percent values than cows greater than 6 years of age. No relationship was noted between serologic status and individual cow origin (purchased or raised), or pregnancy status at the time of sampling.
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Details
- Title
- Neospora caninum seroprevalence and associated risk factors in beef cattle in the northwestern United States
- Creators
- M.W Sanderson - Department of Clinical Sciences, College of Veterinary Medicine, Kansas State University, 1800 Denison Avenue, Manhattan, KS 66506, USAJ.M Gay - Department of Veterinary Clinical Sciences, Field Disease Investigation Unit, College of Veterinary Medicine, Washington State University, Pullman, WA 99164-6610, USAT.V Baszler - Washington Animal Disease Diagnostic Laboratory, Department of Veterinary Microbiology and Pathology, College of Veterinary Medicine, Washington State University, Pullman, WA 99164-7040, USA
- Publication Details
- Veterinary parasitology, Vol.90(1), pp.15-24
- Academic Unit
- Veterinary Clinical Sciences, Department of; Paul G. Allen School for Global Animal Health
- Publisher
- Elsevier B.V
- Identifiers
- 99900547283801842
- Language
- English
- Resource Type
- Journal article