Content continues after advertisement

Physaloptera spp Infection in a Cat

Colin F. Burrows, BVetMed, PhD, Hon FRCVS, DACVIM, Alex Gallagher, DVM, MS, DACVIM, University of Florida

Parasitology

|
April 2014
|
Peer Reviewed

Sign in to Print/View PDF

History & Diagnosis

At 3 years of age, a castrated, domestic shorthaired cat was presented for chronic vomiting, decreased appetite, and weight loss. Diagnostic studies, including CBC, serum chemistry panel, urinalysis, fecal analysis (via microscopic examination of a centrifuged fecal sample), and survey abdominal radiography revealed no abnormalities. Upper GI endoscopy revealed two small nematodes within the stomach, each with one end embedded in the gastric mucosa (Figure 1). A small area of erythema surrounded each attachment point. No nematodes were observed in the proximal duodenum.

 Figure 1. Endoscopic view of the stomach of a cat presented for chronic vomiting. A nemotode parasite consistent with Physaloptera spp is evident in the gastric body.

Clinician's Brief

Treatment

The parasites were removed and identified by a parasitologist as Physaloptera spp. The cat was treated with pyrantel (25 mg/kg PO for 2 days) and famotidine (2 mg/kg PO q12h for 3 days) and recovery was uneventful with no more reported vomiting.

Overview

Physaloptera spp are found in the proximal GI tract of several mammals, including dogs and cats, in which they can cause chronic gastritis and vomiting. Intensity of infection is usually low with as few as 1 to 5 worms capable of causing clinical signs.1 Infection can develop after ingestion of the intermediate hosts (eg, cockroaches, field crickets, flour or ground beetles) or ingestion of transport hosts (eg, rodents, snakes). Diagnosis requires special fecal examination techniques or endoscopy; endoscopy is more efficient, as eggs can be difficult to recover and clinical signs may be apparent before the parasite matures and sheds eggs. Adult Physaloptera spp attach to the gastric and proximal small intestinal mucosa and, when viewed via endoscopy, appear as creamy white worms. According to a study of Physaloptera spp found in cats, females have a reported size of 27 to 41 mm long and 0.9 to 1.1 mm wide while males are 22 to 30 mm long and 0.8 mm wide.2 They may be tightly coiled. Most often they cause intense focal gastritis and enteritis with chronic intermittent vomiting. Inappetence and associated weight loss may also be observed. Treatment involves manual removal of the parasite, followed by oral pyrantel pamoate or fenbendazole; in some cases, anthelmintics may be repeated to resolve signs. Prognosis for resolution of signs is good to excellent.


COLIN F. BURROWS, BVetMed, PhD, Hon FRCVS, DACVIM, is global editor and emeritus editor in chief of Clinician’s Brief. After several years as executive director of the NAVC, he is now president of the WSAVA. He served as chairman of the department of small animal clinical sciences at University of Florida, where his focus was gastroenterology, and is now professor emeritus. He received his veterinary degree from the Royal Veterinary College.  

References

For global readers, a calculator to convert laboratory values, dosages, and other measurements to SI units can be found here.

All Clinician's Brief content is reviewed for accuracy at the time of publication. Previously published content may not reflect recent developments in research and practice.

Material from Clinician's Brief may not be reproduced, distributed, or used in whole or in part without prior permission of Educational Concepts, LLC. For questions or inquiries please contact us.

Podcasts

Clinician's Brief:
The Podcast
Listen as host Alyssa Watson, DVM, talks with the authors of your favorite Clinician’s Brief articles. Dig deeper and explore the conversations behind the content here.
Clinician's Brief provides relevant diagnostic and treatment information for small animal practitioners. It has been ranked the #1 most essential publication by small animal veterinarians for 9 years.*

*2007-2017 PERQ and Essential Media Studies

© 2022 Educational Concepts, L.L.C. dba Brief Media ™ All Rights Reserved. Terms & Conditions | DMCA Copyright | Privacy Policy | Acceptable Use Policy