Experimental in utero inoculation of late-term swine fetuses with porcine circovirus type 2

Charles S. Johnson, Han S Joo, Kochakorn Direksin, Kyoung Jin Yoon, Young K. Choi

Research output: Contribution to journalArticle

35 Scopus citations

Abstract

All 37 fetuses of 3 laparotomized pregnant sows at 86, 92, and 93 days of gestation were inoculated intramuscularly through the uterine wall with porcine circovirus type 2 (PCV-2). The sows were allowed to farrow, and blood and tissue samples were collected from their piglets before and after suckling colostrum. Thirteen fetuses from 2 sows at 90 and 103 days of gestation were used as controls. Of the 37 PCV-2 inoculated fetuses, 24 were grossly normal and 13 were mummified, stillborn, or weak-born at farrowing. Infection with PCV-2 was demonstrated in various tissues of grossly normal and abnormal fetuses by virus isolation, polymerase chain reaction, and immunohistochemical methods. Antibodies specific to PCV-2 were also detected from the sera or thoracic fluids of abnormal fetuses and unsuckled normal pigs. No evidence of PCV-2 infection was found in any control fetuses. The present results confirm previous findings that PCV-2 can infect late-term swine fetuses and may cause reproductive abnormalities.

Original languageEnglish (US)
Pages (from-to)507-512
Number of pages6
JournalJournal of Veterinary Diagnostic Investigation
Volume14
Issue number6
DOIs
StatePublished - Nov 2002

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