Study of prolonged virus infection in cattle stocks infected by bovine respiratory syncytial virus.
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Biomedical subjects
Publications and source records attributed to A Bartha.
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Type 1 bovine adenovirus has been isolated from cell cultures prepared from the kidneys of a 7-month-old bovine fetus, taken from a slaughterhouse, and types 4, 6 and 8 from cell cultures prepared from the testicles of four neonatal, precolostral calves. Sera of these precolostral calves possessed virus-neutralizing antibodies in titers of 1:4--1:16. Bovine adenoviruses of types 4 and 8 have also been isolated from two bovine fetuses aborted from an unknown cause. Relying upon these findings the possible vertical (transplacental) transmission of bovine adenoviruses is presumed. Though a cause-and-effect relationship between abortion and adenovirus infection could not be detected, it is probably that infection during fetal development cannot be indifferent to the fetus or the neonatal calf.
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The elevation of the genus Adenovirus to a family named Adenoviridae is described. This family at the present stage contains two genera, mammalian adenoviruses--Mastadenovirus--and avian adenoviruses--Aviadenovirus. The two genera are separated primarily on the basis of difference in immunological properties of the virions.
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