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1 June 2003 IMMUNIZATION OF MICE WITH PLASMID DNA CODING FOR NcGRA7 OR NcsHSP33 CONFERS PARTIAL PROTECTION AGAINST VERTICAL TRANSMISSION OF NEOSPORA CANINUM
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Abstract

The purpose of the present study was to use direct plasmid deoxyribonucleic acid (DNA) injection to identify specific antigens that confer protection against congenital transfer of Neospora caninum. Inbred BALB/c mice were vaccinated before pregnancy with a recombinant plasmid containing sequences encoding N. caninum antigen NcGRA7 or NcsHSP33. The mice were challenged with N. caninum tachyzoites at 10–12 days of gestation. Whereas 100% of pups born from dams immunized with control plasmid contained detectable levels of N. caninum DNA in a Neospora-specific polymerase chain reaction assay, only 46% of pups from pCMVi-NcGRA7–immunized mice and 53% of pCMVi-NcsHSP33–immunized mice were N. caninum positive, and none of the mice immunized with tachyzoite extract contained N. caninum DNA. Thus, immunization of mice with plasmid DNA expressing N. caninum antigens conferred partial protection against congenital neosporosis.

Susan Liddell, Carolyn Parker, Bryan Vinyard, Mark Jenkins, and J. P. Dubey "IMMUNIZATION OF MICE WITH PLASMID DNA CODING FOR NcGRA7 OR NcsHSP33 CONFERS PARTIAL PROTECTION AGAINST VERTICAL TRANSMISSION OF NEOSPORA CANINUM," Journal of Parasitology 89(3), (1 June 2003). https://doi.org/10.1645/GE-2969
Received: 8 November 2002; Accepted: 1 February 2003; Published: 1 June 2003
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