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Angiostrongylus costaricensis, producing abdominal angiostrongyliasis, is known to occur in humans and/or rodents in the Western Hemisphere, namely in the U.S.A. (Texas), Mexico, Honduras, El Salvador, Costa Rica, Panama, Venezuela, and Brazil. Rats, Oryzomys caliginosus, in Colombia were found to harbor the parasite. First-stage larvae from one of these rats developed to third-stage larvae in the slug Veronicella occidentalis, also from Colombia.
Accepted for publication August 2, 1980.
* This study was supported by the Tulane University-COLCIENCIAS Colombia, International Center for Medical Research, Grant AI-10050 from the NIAID, National Institutes of Health, U.S. Public Health Service, and by Research Career Award K6-AI-18,424, U.S. Public Health Service.
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