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- W2023984047 abstract "Marek's disease (MD) is a highly contagious lymphoproliferative disease of chickens caused by a herpesvirus, while reticuloendotheliosis (REV) virus is an avian C-type retrovirus that causes bursal and nonbursal lymphomas which often closely resemble MDV lymphomas. To provide a rapid and sensitive means of diagnosing and differentiating between these two neoplastic conditions, we have applied the PCR. The primers chosen to detect MDV sequences flank the 132 bp tandem repeat of the BamHI-H fragment, whose PCR product is specific for serotype 1 MDVs. The primers selected for REV are based on proviral spleen necrosis virus-long terminal repeat (SNV-LTR) sequences, and can identify both defective and non-defective REVs. The PCR for field isolates of both viruses was standardized with DNA extracted from chick embryo fibroblasts (CEF) infected with various Israeli isolates of MDV and REV. All chickens were examined for REV antibodies by ELISA, REV isolation was performed in CEF and the tumours were examined histopathologically. In some instances, MDV- and REV-PCRs were performed on whole blood DNA and tumour DNA from the same bird. Normal and tumour-bearing birds from a total of 16 chicken and turkey flocks were studied by PCR. These included three laying flocks with MD, two pullet flocks with neurolymphomatosis, four laying flocks that were the progeny of a REV antibody positive flock, four other REV antibody positive flocks, one turkey flock and two chicken flocks with an immunodeficiency syndrome. Some flocks were bled two or three times at 1- to 3-month intervals. We also analysed 30 normal grandparent light breeding birds. Compared to virus isolation, PCR was more sensitive in detecting MDV and REV sequences. It appears, therefore, that PCR is an efficacious and sensitive method for differential diagnosis of tumour-bearing and immunodeficient birds." @default.
- W2023984047 created "2016-06-24" @default.
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- W2023984047 date "1995-03-01" @default.
- W2023984047 modified "2023-09-26" @default.
- W2023984047 title "Use of the polymerase chain reaction for the diagnosis of natural infection of chickens and turkeys with Marek's disease virus and reticuloendotheliosis virus" @default.
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- W2023984047 doi "https://doi.org/10.1080/03079459508419050" @default.
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