This page quotes a published document. Everything below in quotation marks is copied word for word from https://capcvet.org/guidelines/baylisascaris-procyonis/, published by CAPC and retrieved on 2026-09-16. The quotations are excerpts; the document itself is linked and is the authority. Nothing has been reworded.
This page quotes the Companion Animal Parasite Council guideline for Baylisascaris procyonis, section by section: the opening sentences of 8 sections, copied without change and linked to the guideline, which was retrieved on 2026-09-16. The guideline itself is the authority and carries the full text.
The guideline
Companion Animal Parasite Council, Baylisascaris procyonis, at https://capcvet.org/guidelines/raccoon-roundworm/. Retrieved 2026-09-16. Each heading below is the guideline’s own, and the quotation under it is how that section begins. The full section, and the species tabs where the guideline gives them, are on the linked page.
Synopsis
CAPC Recommends To avoid contamination with eggs of B. procyonis , raccoons should not be kept as pets and people and dogs should avoid areas frequented by raccoons. Dogs should be maintained on monthly intestinal parasite control products with efficacy against ascarids to treat potential newly acquired infections.
Species
Canine Baylisascaris procyonis is an ascarid of raccoons that is occasionally found in dogs. Other Baylisascaris spp. are present in wildlife hosts but have not yet been detected in dogs.
Disease
Infections with adult B. procyonis have not been commonly associated with clinical disease in dogs. However, treatment is still warranted, particularly in light of the severe zoonotic disease associated with this ascarid.
Prevalence
Baylisascaris procyonis occurs in raccoons across the United States and Canada. High prevalence rates have been reported in the midwestern, northeastern, and western states but isolated areas in Texas, Florida, and Appalachia can have localized high prevalence rates.
Diagnosis
Eggs of B. procyonis can be difficult to distinguish from those of the more common Toxocara spp., however, morphologic differences exist (see image under Life Cycle) and differentiation becomes easier with experience. Fecal flotation with centrifugation Diagnosis of patent ascarid infections via fecal flotation is straightforward.
Treatment
Most of the drugs known to remove T. canis from dogs (fenbendazole, milbemycin oxime, moxidectin, and pyrantel pamoate) will also remove Baylisascaris spp. although no treatments are label-approved for this use and retreatment may be needed to eliminate the infections.
Control and Prevention
To avoid contamination with eggs of B. procyonis , raccoons should not be kept as pets and people and dogs should avoid areas frequented by raccoons. To treat potential newly acquired infections, dogs should be maintained on monthly intestinal parasite control products with efficacy against ascarids.
Public Health Considerations
Baylisascaris procyonis can cause disease in people following ingestion of larvated eggs from a contaminated environment. The larvae of B. procyonis migrate extensively in the central nervous system, commonly resulting in severe neurologic disease in affected individuals; B. procyonis can also produce visceral, ocular, and covert forms of disease.
Continue reading public health considerations on capcvet.org
Sources
- capc-raccoon-roundwormCAPC · retrieved 2026-09-16
“CAPC Recommends To avoid contamination with eggs of B. procyonis , raccoons should not be kept as pets and people and dogs should avoid areas” (Synopsis)
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