A case of pseudo-obstruction in a cat associated with amebiasis
- 1Catus Medicina Felina, Fortaleza, CE, Brasil
- 2Department of Veterinary Pathology, University of Saskatchewan, Saskatoon, Canada
Abstract
Case summary: This report describes a 9-year-old, spayed female domestic shorthair cat presenting with a 7-day history of anorexia and previous chronic constipation. Clinical examination revealed abdominal distension and discomfort. Radiographic and ultrasonographic imaging showed severe, generalized gaseous distension of the entire gastrointestinal tract without evidence of mechanical obstruction. An exploratory celiotomy confirmed severe, non-obstructive dilation of the stomach and intestines, with aperistalsis of the ileum and large intestine. Histopathological analysis of intestinal biopsies revealed neuritis and necrosis of the myenteric plexus, along with the presence of protozoan trophozoites consistent with Entamoeba histolytica. These findings led to a diagnosis of intestinal pseudo-obstruction secondary to amebiasis-associated ganglionitis. Treatment was initiated with pyridostigmine, an acetylcholinesterase inhibitor, and metronidazole. The cat responded favorably, with resolution of clinical signs and normalization of defecation. This case documents a rare instance of intestinal pseudo-obstruction in a cat, uniquely associating it with amebiasis and demonstrating a successful therapeutic outcome with pyridostigmine.
Relevance and novel information: To our knowledge, this is the first report of intestinal pseudo-obstruction associated with amebiasis in a feline patient. Furthermore, it adds to the limited literature on the successful use of pyridostigmine for treating severe gastrointestinal dysmotility in cats, offering a potential therapeutic option for this challenging condition.
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BibTeX
@article{filho2026case,
title = {{A case of pseudo-obstruction in a cat associated with amebiasis}},
author = {Reginaldo Pereira de Sousa Filho and Belarmino Eugênio Lopes Neto and Caroline de Brito Ferreira and Keytyanne de Oliveira Sampaio},
journal = {JFMS Open Reports},
year = {2026},
month = jul,
doi = {10.1177/20551169261474357},
url = {https://doi.org/10.1177/20551169261474357},
note = {CC BY-NC 4.0},
}
RIS
TY - JOUR
TI - A case of pseudo-obstruction in a cat associated with amebiasis
AU - Reginaldo Pereira de Sousa Filho
AU - Belarmino Eugênio Lopes Neto
AU - Caroline de Brito Ferreira
AU - Keytyanne de Oliveira Sampaio
PY - 2026
DA - 2026/07/24
JO - JFMS Open Reports
DO - 10.1177/20551169261474357
UR - https://doi.org/10.1177/20551169261474357
AB - Case summary: This report describes a 9-year-old, spayed female domestic shorthair cat presenting with a 7-day history of anorexia and previous chronic constipation. Clinical examination revealed abdominal distension and discomfort. Radiographic and ultrasonographic imaging showed severe, generalized gaseous distension of the entire gastrointestinal tract without evidence of mechanical obstruction. An exploratory celiotomy confirmed severe, non-obstructive dilation of the stomach and intestines, with aperistalsis of the ileum and large intestine. Histopathological analysis of intestinal biopsies revealed neuritis and necrosis of the myenteric plexus, along with the presence of protozoan trophozoites consistent with Entamoeba histolytica. These findings led to a diagnosis of intestinal pseudo-obstruction secondary to amebiasis-associated ganglionitis. Treatment was initiated with pyridostigmine, an acetylcholinesterase inhibitor, and metronidazole. The cat responded favorably, with resolution of clinical signs and normalization of defecation. This case documents a rare instance of intestinal pseudo-obstruction in a cat, uniquely associating it with amebiasis and demonstrating a successful therapeutic outcome with pyridostigmine. Relevance and novel information: To our knowledge, this is the first report of intestinal pseudo-obstruction associated with amebiasis in a feline patient. Furthermore, it adds to the limited literature on the successful use of pyridostigmine for treating severe gastrointestinal dysmotility in cats, offering a potential therapeutic option for this challenging condition.
SN - 2055-1169
ER -