Clinical observations, pathology, bioassay in mice and serological response at slaughter in pigs experimentally infected with Toxoplasma gondii

Anne Wingstrand, Peter Lind, J. Haugegaard, Sv. Aa. Henriksen, Vivi Bille-Hansen, Vibeke Sørensen

Research output: Contribution to journalJournal articlepeer-review

Abstract

Experimental infections of a total of 47 pigs with tachyzoites of the Toxoplasma gondii RH-strain, tissue cysts of the SSI-119 and R92 strains as well as oocysts of the SSI-119 strain were performed to determine the sensitivity of an indirect IgG-ELISA, using tachyzoite lysate of the RH-strain as antigen. The infections led to a dose dependent moderate clinical affection (inappetence, fever and poor general condition). Pigs infected with 10000 oocysts or with 1/2 mouse brain containing tissue cysts of the SSI-119 strain showed a significant decrease in weight gain compared to uninoculated pigs during the first 2 weeks p.i., followed, however, by compensatory growth during the next 6 weeks. At slaughter 3 to 4 months after inoculation 39/41 (95.1%) of pigs positive by bioassay in mice were seropositive in ELISA: Tissue cysts;were not demonstrable by immunohistochemistry. ELISA OD-values obtained by analysis of meat juice from heart muscle and tongue (diluted 1:40) correlated strongly with OD-values by analysis,of serum (diluted 1:400) (r(heart juice) = 0.942; r(tongue juice) = 0.915). Thus, meat juice samples were shown to provide a suitable alternative to serum for serological detection of Toxoplasma infection in pigs.
Original languageEnglish
JournalVeterinary Parasitology
Volume72
Issue number2
Pages (from-to)129-140
ISSN0304-4017
DOIs
Publication statusPublished - 1997

Keywords

  • meat juice
  • Toxoplasma gondii
  • serology
  • pig

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