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United States Department of Agriculture

Agricultural Research Service

Title: First Isolation of Sarcocystis Neurona from the South American Opossum, Didelphis Albiventris, from Brazil

Authors
item Dubey, Jitender
item Lindsay, D - VIRIGNIA TECH
item Kerber, C - SAO PAULO
item Kasai, N - UNIVERSITY OF SAO PAULO
item Pena, H - UNIVERSITY OF SAO PAULO
item Gennari, S - UNIVERSITY OF SAO PAULO
item Kwok, Oliver
item Shen, Samuel
item Rosenthal, Benjamin

Submitted to: Veterinary Parasitology
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: October 1, 2000
Publication Date: N/A

Interpretive Summary: Sarcocystis neurona is a single celled parasite of companion animals and wildlife. It causes a fatal disease (EPM) in horses. Horses become infected by ingesting sporocysts (resistant stage) excreted in the feces of Virginian opossums (Didelphis virginiana). The parasite has not been isolated outside of North America. Scientists at the Beltsville Agricultural Research Center and University of Sao Paulo report the first isolation of Sarcocystis neurona from Brazil in a new host, Didelphis albiventris. These results will be of interest to biologists, veterinarians, parasitologists and pathologists.

Technical Abstract: Sarcocystis neurona was isolated from sporocysts from 2 of 8 South American opossums, Didelphis albiventris, from Brazil. Interferon gamma gene knock out (KO) mice fed sporocysts from 2 opossums developed neurologic sarcocystosis. Sarcocystis neurona was demonstrated in the brains of infected KO mice by immunohistochemical staining with anti-S. neurona antibody. The parasite was cultivated in cell culture and S. neurona DNA was isolated from cultured merozoites. This is the first report of isolation of S. neurona from Brazil and the first report from its new host, D. albiventris.

Last Modified: 7/23/2014
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