This page quotes a published document. Everything below in quotation marks is copied word for word from https://capcvet.org/guidelines/physaloptera-spp/, 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 Physaloptera spp., section by section: the opening sentences of 7 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, Physaloptera spp., at https://capcvet.org/guidelines/stomach-worm/. 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 Physaloptera spp. infection should be considered in dogs and cats with chronic vomiting, especially those with a history of consuming insects or vertebrate prey. When Physaloptera spp. infection is suspected, eggs can be identified on a direct smear or adults removed at endoscopy; eggs of Physaloptera spp. are often not recovered on fecal flotation.
Disease
The presence of adult Physaloptera spp. in the stomach of dogs and cats can lead to gastritis that most commonly presents as chronic vomiting. Vomiting may persist long-term even when only a few (1-3) adult worms are present.
Prevalence
Prevalence of Physaloptera spp. varies widely. Infections appear to be most common in the midwestern United States in dogs and cats with outdoor access and a history of prey consumption.
Diagnosis
Fecal flotation is not considered an effective way to detect infections with Physaloptera spp. Eggs are usually few in number and do not float well in standard specific gravity solutions even when centrifugation is used.
Treatment
Effective treatment of Physaloptera spp., can be difficult and often requires repeated courses of anthelmintics to be effective. Removal of nematodes by endoscopy is usually curative so long as all Physaloptera spp. are visualized and removed.
Control and Prevention
No products are approved to control Physaloptera spp. infection in dogs or cats. However, monthly parasite control products with efficacy against intestinal parasites would likely be effective at limiting infections and subsequent clinical disease.
Public Health Considerations
Physaloptera spp. are not known to be zoonotic. Infected dogs and cats do not pose any public health risk.
Continue reading public health considerations on capcvet.org
Sources
- capc-stomach-wormCAPC · retrieved 2026-09-16
“CAPC Recommends Physaloptera spp. infection should be considered in dogs and cats with chronic vomiting, especially those with a history of consuming insects or vertebrate” (Synopsis)
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