Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 24 for “"Bovine viral diarrhea virus"”.
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Investigation of surveillance techniques to detect Bovine viral diarrhea virus in cattle
<p><em>Bovine viral diarrhea viruses<em> (BVDV) are important pathogens of cattle globally. Vaccination is often used to control BVDV, but complete control requires detection and elimination of cattle persistently infected (PI) with BVDV. These cattle are infected with BVDV during gestation, become …
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Biosecurity and risk analysis for cow-calf enterprises: a simulation model for Bovine Viral Diarrhea Virus
… of different biosecurity strategies for Bovine Viral Diarrhea Virus (BVDV) on cow-calf farms. Where possible, risk distributions were defined in the course of a critical literature review covering all publications since 1990 relevant to BVDV on cow-calf farms. The prevalence of persistent …
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Development of a Subunit Vaccine Against Bovine Diarrhea Caused by K99 Enterotoxigenic Escherichia coli and Bovine Viral Diarrhea Virus
<p>Bovine diarrhea is economically one of the most important problems in cattle industry. Enterotoxigenic Escherichia coli (ETEC), particularly strains expressing K99 (F5) fimbriae and heat-stable type I (STa) enterotoxin is the predominant bacterial cause of diarrhea in calves; whereas bovine …
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Prevalence of bovine viral diarrhea virus subspecies among persistently infected positive samples submitted to a diagnostic laboratory from cattle in the United States
Bovine viral diarrhea virus (BVDV) is an infectious disease affecting ruminants worldwide. Impacting the respiratory, reproductive, and digestive systems, BVDV remains one of the most economically damaging diseases to cattle producers. Previous phylogenetic analysis has divided the virus into two …
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A Prevalence Study of Southeast Origin Sale Barn Beef Cattle, Comingled in Warren County, Kentucky, Persistently Infected with Bovine Viral Diarrhea Virus, including the Effects of Season and Body Weight
<p>Bovine viral diarrhea (BVD) is an economically important disease of cattle. Calves persistently infected (PI) with the bovine viral diarrhea virus (BVDV) are a powerful agent for spread of the virus. A total of 24,423 southeast origin beef cattle comingled at three Warren County, Kentucky …
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Mitigation of Bovine Respiratory Disease Complex: Interactions of Physiology, Immunology, Nutrition and Management
… and exposure to persistently infected bovine viral diarrhea virus challenge on health, gain performance, and physiological and immunological measurements in newly received stocker cattle. Two experiments evaluated timing (d 0 vs. 14) of respiratory, clostridial, or both vaccinations in …
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Effects of Respiratory Vaccination Timing and Hormonal Growth Implant on Health, Performance, and Immunity of Newly Received Stocker Calves
… for energy required for immune response during bovine respiratory disease (BRD) challenge. This study was conducted to determine the effects of pentavalent respiratory vaccination timing with or without a hormonal growth implant on arrival (d 0) on health, performance, complete blood count, and …
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Field comparison of intranasal and injectable bovine respiratory disease vaccination on beef calf antibody concentrations, average daily gain, and bovine respiratory disease morbidity
Bovine respiratory disease (BRD) is a multifactorial disease complex that is common in feedlot operations, where it causes major economic loss through: reduction in average daily gain, treatment costs, and mortality. Reducing BRD incidence would increase profits to producers, reduce antimicrobial …
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Search for etiology of porcine reproductive and neurologic syndrome: identification and characterization of a novel swine pestivirus
… A previously unrecognized small enveloped RNA virus of approximately 50 nm in size was repeatedly isolated from field cases of PRNS and tentatively named "Virus X". The disease and/or lesions of PRNS were reproduced in pregnant sows and young caesarian-derived-colostrum-deprived (CDCD) pigs …
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Using Genetic and Pathogeneses Studies to Develop Antiviral and BVDV Vaccine Targets
<p>Understanding bovine viral diarrhea virus (BVDV) interaction with the host may help explain the ability of the virus to cause multiple forms of disease ranging from subclinical symptoms to severe disease and even death. BVDV cytopathogenicity and onset of mucosal disease within one herd of PI …
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Dissecting the Entry Pathways of Hepatitis C and Bovine Viral Diarrhea Viruses
<p>Hepatitis C virus (HCV) and bovine viral diarrhea virus (BVDV) are closely related members of the family Flaviviridae and are important human and animal pathogens, respectively. In this work, I investigated how these viruses interact with and enter both naïve and previously infected cells, …
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Understanding the Effect of BVDV on Innate Immune Response of Neutrophils
<p>Bovine viral diarrhea virus (BVDV) is one of the highly prevalent and economically important diseases of cattle industry worldwide. The two major consequences of this disease are persistent infection and immunosuppression. Several studies have been done to determine the underline mechanisms of …
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Genetic and Biochemical Analyses of the Flaviviridae Capsid Proteins
<p>The small, enveloped viruses of the family Flaviviridae are etiological agents of numerous important human and agricultural diseases including hepatitis C, yellow fever, and bovine viral diarrhea. Efficient dissemination of these viruses is dependent on the production of infectious particles, …
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Design and evaluation of a biosecure composting system to dispose of swine mortalities during a foreign animal disease outbreak
… with Salmonella spp. and vaccine strains of Bovine Herpesvirus-1 (BHV-1) and Bovine Viral Diarrhea Virus (BVDV). Air samples collected from the upper aeration duct (air outlet) during the first ten days of composting were negative, which indicated that aerosol transmission of the pathogens …
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Implémentation d'une méthode de détection du virus de la diarrhée virale bovine au sein de la fondation de la promotion des productions andines Proinpa (Bolivie)
An animal infected by the Bovine Viral Diarrhea Virus will have diarrheas, which can lead to milk production reduction, reproduction problems (and particularly abortion problems) and general weakness. This all leads to an economic loss. This is why the virus detection and the carriers, or …
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Importanza prognostica delle citochine e loro ruolo nell'immunomodulazione: risultati di studi sperimentali in vivo e in vitro
… horse Recurrent Airway Obstruction, foal sepsis, Bovine Viral Diarrhea Virus infection and dog Parvovirus infection and the effects of these agents on the host immune system. As experimentations with mice have shown, some pathologies of the respiratory and nervous system can be reduced or even …
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Effects of Fire on the Nutritional Ecology of Selected Ungulates in the Southern Black Hills, South Dakota
… than unburned habitat. Based on serum titers, bovine viral diarrhea virus type I was prevalent in 23.1 and 30.8% of mule deer in burned and unburned habitat, respectively, whereas type II was prevalent in 5.6 and 12.5% of mule deer in burned and unburned habitat, respectively. Epizootic …
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Assessing and understanding the generation and function of RNA decay intermediates in non-insect borne flaviviruses
… to stimuli or to maintain homeostasis. RNA viruses must act to preferentially drive production of their own messenger RNAs (mRNAs) and proteins in order to successfully replicate and ensure continued infection. Due to the necessity for RNA viruses to remain in the cytoplasm, regulatory …
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Surveillance Enhancing Strategies for the Mitigation of Emerging Cattle Parasite Theileria orientalis Ikeda
… characterized by costly clinical outbreaks of Bovine Infectious Anemia, with severe cases resulting in abortion, stillbirth, and death, with still more production costs incurred due to lowered dairy and beef production in surviving animals. As such, Ikeda represent an enormous economic threat …
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Dissecting the Novel Roles of TRIM56 in Antiviral Innate Immunity
… proteins have emerged as a new class of host antiviral restriction factors, with several demonstrating roles in regulating innate antiviral responses. Of >70 known TRIMs, TRIM56 inhibits replication of bovine viral diarrhea virus, a ruminant pestivirus of the family <em>Flaviviridae</em>, but has …
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