An immunohistochemical method for detecting bradyzoite antigen (BAG5) in toxoplasma gondii-infected tissues cross-reacts with a Neospora caninum bradyzoite antigen

Milton M. McAllister, Stephen F. Parmley, Louis M. Weiss, Valerie J. Welch, Angela M. McGuire

Research output: Contribution to journalArticle

108 Scopus citations

Abstract

The previously cloned gene of a bradyzoite-specific antigen (BAG5) of Toxoplasma gondii was used to express a fusion protein for subsequent antiserum production in rabbits. The BAG5 antiserum was used in an immunohistochemical procedure to look for reactive epitopes in bradyzoites and tachyzoites of T. gondii within animal tissues. Encysted bradyzoites in brain were stained deeply and diffusely. Although most unencysted organisms in brain were not stained, occasional free organisms had mild to deep staining. There was no staining of tachyzoites in liver where cysts were not observed. Neospora caninum organisms within animal tissues were also examined using the BAG5 immunohistochemical procedure. The BAG5 antiserum cross- reacted with N. caninum bradyzoites but had no affinity for tachyzoites.

Original languageEnglish (US)
Pages (from-to)354-355
Number of pages2
JournalJournal of Parasitology
Volume82
Issue number2
DOIs
StatePublished - Apr 1 1996

ASJC Scopus subject areas

  • Parasitology
  • Ecology, Evolution, Behavior and Systematics

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