Transient correlation between viremia levels and IL-10 expression in pigs subclinically infected with porcine circovirus type 2 (PCV2)

L. Darwich, J. Segalés, A. Resendes, M. Balasch, J. Plana-Durán, E. Mateu

Research output: Contribution to journalArticleResearchpeer-review

38 Citations (Scopus)

Abstract

Immunological impairment by porcine circovirus type 2 (PCV2) infection is well documented in pigs suffering from postweaning multisystemic wasting syndrome. Nonetheless, little is known about immune status of pigs that remain PCV2 subclinically infected. Thus, seven pigs successfully infected in an experimental inoculation and without developing disease and nine control non-inoculated pigs were examined. Serological, virological and immunological determinations were done throughout ten weeks post-infection (PI). At week 3 PI, inoculated animals presented the peak of viremia and produced higher levels of IL-10 than the controls; correlation between viral load and IL-10 amounts was observed (p < 0.05). Also, the ratio IgM/IgG suffered a shift skewing IgM production towards an IgG response. By 10 weeks PI, levels of IL-10 disappeared and the viremia decreased. In summary, subclinically PCV2-infected pigs developed a transient PCV2-specific IL-10 response during the viremic phase of infection which coincided with the inversion of the IgM/IgG ratio. © 2007 Elsevier Ltd. All rights reserved.
Original languageEnglish
Pages (from-to)194-198
JournalResearch in Veterinary Science
Volume84
Issue number2
DOIs
Publication statusPublished - 1 Apr 2008

Keywords

  • IgM/IgG ratio
  • IL-10
  • PCV2 viremia
  • Porcine circovirus type 2 (PCV2)
  • Subclinical infection

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