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Peer-reviewed veterinary case report

Cat with growing face mass caused by Spirometra mansoni infection

By Toshihiro Tokiwa et al.·Published in BMC Veterinary Research·2024·Laboratory of Veterinary Parasitology, Nippon Veterinary and Life Science University, GB·View original on DOAJ

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Original publication title: Aberrant sparganosis in cat caused by Spirometra mansoni (Cestoda: Diphyllobothriidae): a case report

Species:
cat

Plain-English summary

A 9-year-old male domestic cat was brought to the vet with a growing mass on the right side of its face that had been getting larger over the past month. After examining the tissue, the vet found that the mass was caused by a rare infection from a type of tapeworm called Spirometra mansoni. This condition, known as proliferative sparganosis, is unusual in cats, even though the tapeworm is commonly found in their intestines. The cat underwent surgery to remove the mass, and the findings confirmed the diagnosis.

People also search for: cat face mass · cat tapeworm infection · cat surgery for facial lump

Abstract

Abstract Background Sparganosis is a rare zoonotic disease caused by plerocercoid larvae of the genera Spirometra or Sparganum (Cestoda: Diphyllobothriidae). The larvae of Spirometra generally do not undergo asexual reproduction, whereas those of Sparganum can induce proliferative lesions in infected tissues. This paper presents an unusual case of proliferative sparganosis due to infection with Spirometra mansoni in a cat, normally considered a definitive host of the species. Case presentation A 9-year-old male domestic cat was presented with a mass on the right side of the face that underwent progressive enlargement for 1 month. The morphological and histopathological examinations revealed multiple asexual proliferative cestode larvae in the lesions, suggestive of proliferative sparganosis. Next-generation sequencing analysis of formalin-fixed and paraffin-embedded specimens of surgically excised tissue indicated that the worm was Spirometra mansoni. Conclusion Although S. mansoni a common tapeworm species found in the small intestine of domestic cats and dogs in Japan, proliferative sparganosis is extremely rare. This is the first confirmed case of proliferative sparganosis due to infection with S. mansoni in cat.

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Original publication on DOAJ: https://doi.org/10.1186/s12917-024-03995-z