Vaccination of mice with Neospora caninum: Response to oral challenge with Toxoplasma gondii oocysts

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dc.contributor.authorLindsay, David S.en
dc.contributor.authorLenz, S. D.en
dc.contributor.authorDykstra, C. C.en
dc.contributor.authorBlagburn, B. L.en
dc.contributor.authorDubey, Jitender P.en
dc.date.accessed2014-06-16en
dc.date.accessioned2014-06-20T14:13:24Zen
dc.date.available2014-06-20T14:13:24Zen
dc.date.issued1998-04en
dc.description.abstractNeospora caninum is a protozoan parasite that can cause severe disease in mammals. Two experiments were conducted to examine the effects of subcutaneous (s.c.) vaccination with Hank's balanced salt solution (HBSS), 1 x 10(5) N. caninum NC-1 strain tachyzoites or 1 x 10(5) Toxoplasma gondii TS-4 strain tachyzoites on challenge oral infections in mice with sporulated VEG strain T. gondii oocysts (1 x 10(3) oocysts exp. 1 and 5 x 10(3) oocysts exp. 2). An additional study, experiment 3, evaluated s.c. challenge with 2.5 x 10(3) tachyzoites of the highly virulent RH strain of T. gondii after vaccination with HBSS, NC-1 tachyzoites, or TS-4 tachyzoites. Mice vaccinated with NC-1 strain tachyzoites survived significantly (P < 0.05) longer than mice given HBSS in experiment 1, but not in experiments 2 and 3. Mice vaccinated with TS-4 strain tachyzoites survived significantly longer than HBSS-vaccinated mice in experiments 1, 2, and 3 and significantly longer than mice vaccinated with the NC-1 strain in experiments 2 and 3. Toxoplasma gondii tissue cyst numbers were significantly lower for mice vaccinated with TS-4 strain tachyzoites than mice vaccinated with HBSS or the NC-1 strain tachyzoites in experiment 1. No difference was observed in tissue cyst numbers in mice vaccinated with HBSS or NC-1 strain tachyzoites in experiment 1. No HBSS-vaccinated mice survived experiment 2, and the numbers of T. gondii tissue cysts were significantly lower for mice vaccinated with the TS-4 strain tachyzoites compared to NC-1 strain tachyzoites. No HBSS- or NC-1-vaccinated mice survived RH strain challenge in experiment 3. Results of these experiments indicate that infection with N. caninum provides some protection against fatal oral infection with T. gondii oocysts of a moderately pathogenic strain but not tachyzoites of a highly pathogenic strain. The protection provided bq N. caninum is much less than that provided by previous exposure to T. gondii, and the numbers of tissue cysts in the brains of mice are not significantly (P > 00.5) lowered.en
dc.description.sponsorshipCollege of Veterinary Medicine, Auburn University grant FADHR-ALAV-0270en
dc.format.mimetypeapplication/pdfen
dc.identifier.citationDavid S. Lindsay, Steve D. Lenz, Christine C. Dykstra, Byron L. Blagburn and J. P. Dubey (1998). "Vaccination of mice with Neospora caninum: Response to oral challenge with Toxoplasma gondii oocysts," The Journal of Parasitology, Vol. 84, No. 2, pp. 311-315. 10.2307/3284488en
dc.identifier.doihttps://doi.org/10.2307/3284488en
dc.identifier.issn0022-3395en
dc.identifier.urihttp://hdl.handle.net/10919/49093en
dc.identifier.urlhttp://www.jstor.org/stable/3284488en
dc.language.isoenen
dc.publisherAmerican Society of Parasitologyen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectlinked-immunosorbent-assayen
dc.subjectserological diagnosisen
dc.subjectchronic infectionen
dc.subjectdogsen
dc.subjecttransmissionen
dc.subjectencephalitisen
dc.subjectantigenen
dc.subjectelisaen
dc.subjectgenesen
dc.subjectcellsen
dc.subjectparasitologyen
dc.titleVaccination of mice with Neospora caninum: Response to oral challenge with Toxoplasma gondii oocystsen
dc.title.serialJournal of Parasitologyen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten

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