Detection of porcine parvovirus using nonradioactive nucleic acid hybridization

Journal of Veterinary Diagnostic Investigation : Official Publication of the American Association of Veterinary Laboratory Diagnosticians, Inc
K OraveerakulT W Molitor


Nonradioactive slot blot hybridization assays were established for the detection of porcine parvovirus (PPV), using either a digoxigenin-labeled DNA probe or a biotinylated RNA probe. All probes were prepared from a 3.3-kb Pst1-EcoR1 DNA fragment of the NADL8 isolate of PPV. The sensitivity and specificity of the probes in a slot blot system were evaluated in comparison with a 32P-radiolabeled RNA probe. Using an anti-digoxigenin alkaline phosphatase detection system, at least 1 ng of viral replicative form (RF) DNA, or the equivalent of 100 plaque forming units (PFU) of infectious virus, could be detected by the digoxigenin-labeled DNA probe. When the biotinylated RNA probe and a strepavidin-alkaline phosphatase detection system were employed, 0.1 ng of RF DNA, or the equivalent of 10 PFU of infectious virus, were detected, comparable to the sensitivity of the 32P-radiolabeled RNA probe. Hybridization was not observed with control DNA samples extracted from swine testicle cells, porcine kidney (PK-15) cells, uninfected mixed swine fetal tissue, or from an unrelated DNA virus (pseudorabies virus) infected PK-15 cells. Different isolates of PPV, namely NADL8, NADL2, KBSH, and Kresse, reacted on an equimolar basis in sensitivity ...Continue Reading


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DNA, Viral
Fetal Mummification
Genomic Hybridization
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Swine Diseases

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