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This report identifies and genotypes the bovine viral diarrhoea virus (BVDV) in up to 20 years old archival formalin fixed paraffin embedded (FFPE) tissues of bovine foetuses and calves. Samples from 6 presumably BVDV aborted foetuses and 3 calves diagnosed with mucosal disease were tested by immu- ...
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Since all retroviruses possess reverse transcriptase (RT) enzyme, reverse transcriptase activity has been the main supportive evidence of retroviral etiology of haemic neoplasia (HN) in soft shell clams, Mya arenaria. The objective of the present study was to search for a putative retrovirus in vari...
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Infection with bovine herpesvirus type 1 (BHV-1) occurs worldwide and causes serious economic losses due to the deaths of animals, abortions, decreased milk production, and loss of body weight. BHV-1 is frequently found in bovine semen and is transmitted through natural service and artificial insemi...
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Antibody-induced conformational changes of proteins have been recently frequently suggested to explain a variety of observations. In spite of the fundamental importance of this phenomenon for both in vivo and in vitro antigen-antibody interactions, it is not generally accepted because of the lack of...
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Infectious salmon anemia virus (ISAV) is a very important fish virus in the Northern hemisphere and there is continued interest in understanding the mechanisms of its pathogenesis and persistence in fish. In this study, the permissive fish cell lines SHK-1, CHSE-214 and TO were used to determine whe...
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Reverse transcriptase (RT) activity has been reported in bivalves affected by haemic neoplasia (HN). Since all retroviruses have RT, detection of RT activity was regarded as evidence for the retroviral etiology of HN. This study investigates the relationship between RT levels and the progress of HN ...
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The prevalence of bovine viral diarrhea virus (BVDV) persistency was examined in 12 Holstein dairy herds in Charlottetown, Canada, from Feb. 2009 to Oct. 2009. A total of 469 serum and ear notch biopsy pairs were collected. Depending upon the age and vaccination status, the sampled animals were divi...
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Haemic neoplasia (HN) is a leukemia-like disease that affects at least 20 species of marine bivalves including soft shell clam, Mya arenaria. Since the disease was discovered in 1969, the etiology remains unknown. A retroviral etiology has been suggested based on the detection of reverse transcripta...
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There is disclosed a process for detecting an RNA virus in a tissue cell or fluid sample, e.g. clinical, suspected of containing the virus. The process comprises heating the sample to a temperature sufficient for protein uncoating the RNA virus, in the presence of an RNase enzyme inhibitor active at...