OBSERVATIONS OF SW AINSONA GALEGIFOLIA POISONING IN CATTLE IN NORTHERN NEW SOUTH WALES |
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Authors: | W J Hartley MRCVS MVSc A J F Gibson BVSc† |
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Institution: | *Department of Veterinary Medicine, University of Sydney Camden New South Wales;†Newktead South, Elsmore, New South Wales |
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Abstract: | A mild interstitial pneumonia with mononuclear cell infiltration was produced in calves following intra-tracheal inoculation of the BIL adenovirus. Viral antigen appeared early in the regional lymph node. An interstitial reaction developed early in the lungs, and pneumonic lesions and infective virus were present by the third day after inoculation. Virus spread rapidly to trachea, tonsils and nasal mucosa, and was excreted from the third to eighth day. Upper and lower respiratory tissues continually harboured virus until the 12th day, when the experiment was terminated. The virus was isolated from the livers of two calves. All tissues yielded low concentrations of virus, and only the lung showed pathological reactions. The reactions were qualitatively similar to known adenovirus pneumonias, but considerably milder, and lacked the characteristic necrotic and proliferative bronchiolar changes. |
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