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Susceptibility of Culicoides variipennis sonorensis to infection by polymerase chain reaction-detectable bluetongue virus in cattle blood



Susceptibility of Culicoides variipennis sonorensis to infection by polymerase chain reaction-detectable bluetongue virus in cattle blood



American Journal of Tropical Medicine and Hygiene 54(5): 481-485



Cattle bloods containing only polymerase chain reaction (PCR)--detectable bluetongue-10 viral nucleic acid, but as determined by virus isolation techniques, not bluetongue-10 virus, were incapable of infecting intrathoracically inoculated Culicoides variipennis sonorensis. These insects also failed to transmit bluetongue-10 virus when fed on sheep. Cattle whose blood contain only PCR-detectable bluetongue viral nucleic acid, but no infectious virus, are unlikely to play a role in the epidemiology of bluetongue. The biological significance of PCR-based detection assays and their effect on animal health regulations on the international trade of livestock and livestock germplasm is discussed. Bluetongue virus infection provides a very useful model with which to study arthropod-transmitted RNA virus infections of humans and other animals.

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Accession: 002973253

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PMID: 8644902


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