Platynosomum sp. FOUND DURING NECROPSY IN A DOMESTIC CAT FROM TERESINA, PIAUÍ

Abstract

Platynosomum is a genus of trematodes that inhabits the hepatobiliary system of felids (its definitive hosts)
and is often associated with the cholangitis/cholangiohepatitis complex and hepatic cystic disease in cats.
Animals are typically asymptomatic in the early stages of infection; however, some cases may rapidly progress
to anorexia, weight loss, jaundice, vomiting, diarrhea, dehydration, and death, underscoring the necessity of
early diagnosis. The aim of this study was to report a case of Platynosomum sp. infection in a domestic cat
from Teresina, Piauí, diagnosed post-mortem. The male, domestic short-haired cat (DSH), approximately one
year old, presented with clinical signs suggestive of intoxication, which prompted veterinary care. Despite six
hours of supportive therapy, the animal died and was submitted to necropsy. The procedure revealed diffuse
hepatomegaly, a yellowish discoloration of the liver, and dilation of the bile ducts. Within the dilated ducts,
trematode specimens consistent with the genus Platynosomum were found and confirmed based on their
morphological characteristics. This report highlights the occurrence of platynosomosis in a domestic cat in
Teresina-PI, reinforces the importance of including this parasite in the differential diagnosis of feline
hepatobiliary disorders, and stresses the critical role of necropsy in confirming the diagnosis.