Baylisascaris procyonis Parasites in Raccoons, Costa Rica, 2014

To the Editor: Baylisascaris procyonis (Ascaridoi- dea: Ascarididae) parasites are facultatively heteroxenous nematodes that are widely distributed in the United States and Canada, where prevalence rates reach 70%–90%. They colonize the small intestine of their final host, the northern raccoo...

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Main Authors: Baldi, Mario, Alvarado, Gilbert, Smith, Steve, Santoro, Mario, Bolaños, Natalie, Jiménez, Carlos, Hutter, Sabine E., Walzer, Chris
Format: Artículo
Language: Inglés
Published: Centers for Disease Control and Prevention 2022
Subjects:
Online Access: http://hdl.handle.net/11056/23281
Summary: To the Editor: Baylisascaris procyonis (Ascaridoi- dea: Ascarididae) parasites are facultatively heteroxenous nematodes that are widely distributed in the United States and Canada, where prevalence rates reach 70%–90%. They colonize the small intestine of their final host, the northern raccoon (Procyon lotor), whose feces can contain up to 25 × 103 eggs/g. Under ideal environmental conditions (100% humidity and 24°C), eggs become infective in soil (1,2). When ingested by other mammalian hosts, third-stage lar- vae can produce pathologic changes called larva migrans, which can lead to chronic neurologic disorders and even death (1,3). B. procyonis parasite infection of humans oc- curs by the fecal–oral route (ingestion of eggs in contami- nated food) (1). Small children are particularly vulnerable through accidental geophagia. Public health concerns arise where raccoon and human populations overlap.