Studies on serological cross-reaction of Neospora caninum with Toxoplasma gondii and Hammondia heydorni

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Abstract

The enzyme-linked immunosorbent assay (ELISA) was used to examine cross-reactivity of Neospora caninum with Toxoplasma gondii and Hammondia heydorni. Anti-T. gondii mouse and cat sera cross-reacted with N. caninum soluble antigen (NLA), but not with the recombinant surface antigen (NcSRS2). Anti-H. heydorni dog sera showed no cross-reactivity with either the NLA antigen or the NcSRS2. Lack of cross-reactivity between anti-H. heydorni sera and N. caninum antigens, and the cross-reactivity of anti-T. gondii sera with the NLA suggest that N. caninum has common antigens to T. gondii except for NcSRS2 based on serology. In light of several studies suggesting a closer relationship between N. caninum and H. heydorni than with T. gondii, examination of serological cross-reactivity with N. caninum may be necessary to further classify the parasites in addition to molecular and morphological studies and clarification of the life cycle.

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Nishikawa, Y., Claveria, F. G., Fujisaki, K., & Nagasawa, H. (2002). Studies on serological cross-reaction of Neospora caninum with Toxoplasma gondii and Hammondia heydorni. Journal of Veterinary Medical Science, 64(2), 161–164. https://doi.org/10.1292/jvms.64.161

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