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Characterization of Shedding Patterns of Porcine CircovirusTypes 2a and 2b in Experimentally Inoculated Mature Boars
- Source :
- Journal of Veterinary Diagnostic Investigation; November 2008, Vol. 20 Issue: 6 p725-734, 10p
- Publication Year :
- 2008
-
Abstract
- Porcine circovirus-2(PCV-2) is an economically important swine pathogen and causes PCV-associated disease (PCVAD) in pigs worldwide. Currently, 2 genotypes of PCV-2, PCV-2a and −2b, are circulating in U.S. swine herds. The objectives of the current study were to evaluate the amount of PCV-2 DNA present in semen over time, compare and correlate incidence and amount of PCV-2 present in semen samples to that present in serum samples and blood swabs, and determine if there are differences in shedding patterns between PCV-2a and −2b. Fifteen 7-month-old PCV-2-naïve Landrace boars (Sus scrofa) were randomly allocated to 3 treatment groups. The boars in group 1 (n= 3) served as negative controls, and those in groups 2 (n= 6) and 3 (n= 6) were intranasally and intramuscularly inoculated with PCV-2a and −2b, respectively. Semen, serum, and blood swab samples were collected up to 90 days postinoculation (DPI), and necropsies were performed on DPI 23,48, and 90. Larger quantities of both PCV-2a and − 2b DNA were detected earlier in serum and blood swab samples than in raw semen of experimentally inoculated boars. The incidence and duration of presence of PCV-2 DNA in semen varied among boars; however, intermittent shedding was not observed. In all sex glands, PCV-2 DNA was detected by polymerase chain reaction; however, PCV-2 antigen was not detected by immunohistochemistry, and PCV-2 had no effect on sperm morphology. Differences in shedding patterns between PCV-2a and −2b were not observed under the study conditions.
Details
- Language :
- English
- ISSN :
- 10406387 and 19434936
- Volume :
- 20
- Issue :
- 6
- Database :
- Supplemental Index
- Journal :
- Journal of Veterinary Diagnostic Investigation
- Publication Type :
- Periodical
- Accession number :
- ejs42315972
- Full Text :
- https://doi.org/10.1177/104063870802000603