Results 181 to 190 of about 27,175 (232)

Morphology of bovine viral diarrhea virus

American Journal of Veterinary Research, 1984
SUMMARY The morphology of bovine viral diarrhea virus (bvdv) was studied by electron microscopy. The NADL strain of bvdv was plaque purified 3 times, concentrated by polyethylene glycol precipitation, and purified by centrifugation to equilibrium in continuous potassium tartrate density-gradients.
H J, Chu, Y C, Zee
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Bovine Viral Diarrhea Infection in Pigs

Journal of the American Veterinary Medical Association, 1971
SUMMARY Sixty-six pigs were exposed experimentally to bovine viral diarrhea (bvd) virus. Several strains of the virus and routes of administration were utilized. The immunologic, pathologic, serologic, and virologic responses of pigs in selected groups were determined. In a group of pigs exposed twice to a field strain of virus, the serologic responses
W C, Stewart, E A, Carbrey, E W, Jenney, C L, Brown, J I, Kresse   +4 more
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Bovine Viral Diarrhea in the Neonatal Calf

Journal of the American Veterinary Medical Association, 1974
SUMMARY Bovine viral diarrhea (bvd) virus has been implicated in neonatal calf enteritis. Calves may become infected in utero or postnatally. In utero infection may terminate in abortion, cerebellar hypoplasia, birth of a weak calf, or clinically inapparent infection. Clinical signs in neonatal calves may include fever, leukopenia, nasal discharge, and
G, Lambert, A W, McClurkin, A L, Fernelius   +2 more
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Bovine viral diarrhea in a newborn calf

Journal of the American Veterinary Medical Association, 1985
Bovine viral diarrhea virus was believed to be the cause of ill-thrift since birth, resulting in death of a Holstein calf. Bovine viral diarrhea virus was isolated from Peyer's patches and mesenteric lymph nodes, but serum neutralizing antibodies were not detected.
K C, Lloyd, D D, Morris
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Bovine Viral Diarrhea

American Association of Bovine Practitioners Conference Proceedings, 1987
Bovine viral diarrhea virus is the most important viral pathogen of the bovine fetus. After birth it is responsible for two clinically dissimilar conditions: BVD and mucosal disease. It also causes significant losses as a result of its interaction with other pathogens, enhancing their morbidity in dual infections.
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The persistence of bovine viral diarrhea virus

Biologicals, 2003
Bovine viral diarrhoea virus (BVDV) has a unique capacity to cause persistent infections of foetuses exposed within the first 150 days of gestation. Preventing foetal BVDV infection will aid in improved control. This unique ability gives BVDV a selective advantage allowing continual mutation and antigenic variation within cattle populations. Therefore,
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Immunogens of bovine viral diarrhea virus

Veterinary Microbiology, 1993
Bovine viral diarrhea virus (BVDV) is a ubiquitous pathogen of cattle that induces economically important diseases affecting multiple organ systems. In the United States, over 150 biological products are licensed for control of BVDV. These products contain live or killed BVDV, and many products contain other viruses or bacteria. Potency tests for these
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Immunology of Bovine Viral Diarrhea Virus

Veterinary Clinics of North America: Food Animal Practice, 1995
Often persistent and primary postnatal infections with BVDV result in immunosuppression in cattle, thereby enhancing the vulnerability of the latter to secondary infections. The evidence for and nature of impaired immunity in these animals is reviewed. Our knowledge of the extent and nature of protective immunity induced by natural BVDV infections and ...
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Bovine Viral Diarrhea Virus

American Association of Bovine Practitioners Conference Proceedings, 2010
The purpose of this study was to detect and confirm PI dairy cattle, research the dam's location during the first trimester of gestation, and genetically sequence a portion of the 5' untranslated (UTR) region of viral RNA to determine the prevalence of different genotypes of BVDV PI dairy cattle in the upper midwestern United States.
Schefers, J. M., Collins, J. E., Goyal, S. M., Ames, T. R.   +3 more
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Epidemiology of Bovine Viral Diarrhea Virus

Veterinary Clinics of North America: Food Animal Practice, 1995
Prevalence studies around the world show that BVDV is widespread in most cattle raising countries. There are significant differences, however, in prevalence between areas, probably the result of differences in cattle population structure and management practice.
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