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Strongyloides spp . e um parasito intestinal que afeta diversas especies animais. Quatro especies desse genero tem sido descritas em felinos domesticos: S. felis , S. planiceps , S. stercoralis e S. tumefaciens . Nas tres primeiras especies o adulto e encontrado no intestino delgado. Ja os adultos de S. tumefaciens sao encontrados em nodulos no intestino grosso. Contudo nao foram encontrados relatos dessa especie no Brasil. Ha apenas relatos de infeccao por S. stercoralis em gatos domesticos nesse pais. O objetivo desse trabalho e descrever os aspectos patologicos do parasitismo por Strongyloides spp. em dois gatos da regiao amazonica, no estado do Para. Os dois felinos foram encaminhados para necropsia, onde foram observados numerosos nodulos esbranquicados no intestino grosso, medindo cerca de 0,2 cm de diâmetro. Os nodulos eram salientes na mucosa do colon e continham um orificio puntiforme central voltado para o lumen. Na microscopia os nodulos eram constituidos por projecoes do epitelio da mucosa para submucosa, formando tubulos revestidos por camada unica de epitelio colunar com grande celularidade e raras celulas caliciformes, caracterizando hiperplasia do epitelio das criptas.  No lumen dos tubulos foram observados adultos e ovos com morfologia compativel com a de Strongyloides spp. No intersticio adjacente ao nodulo havia numerosas larvas. Entremeando e margeando o nodulo hiperplasico, havia infiltrado linfoplasmocitario leve. As alteracoes histologicas estao de acordo com as descritas na infeccao por S. tumefaciens (BOWMAN et al., 2002). Embora a identificacao especifica nesse caso ainda esteja em andamento, este padrao de resposta tecidual nao tem sido descrito na infeccao por outras especies de Strongyloides nos gatos domesticos. Os dados do presente estudo indicam que a possibilidade da infeccao por essa especie em felinos no Brasil deve ser investigada. SUMMARY Strongyloides spp. is an intestinal parasite that affects several animal species. Four species of this genus have been described in domestic cats: S. felis, S. planiceps, S. stercoralis and S. tumefaciens . The adult of the first three species is found in the small intestine. The adults of S. tumefaciens are found in the nodes of the large intestine; however, there are no reports of this species in Brazil. There are a few reports of infection by S. stercoralis in domestic cats in this country. This study aims to describe the pathological aspects of parasitism by Strongyloides spp. in two cats in the Amazon region, Para.  During the autopsy of the two cats, numerous whitish nodules measuring about 0.2 cm in diameter were observed in the large intestine. The nodules were prominent in the colonic mucosa and displayed a punctiform orifice facing the central lumen. Microscopically, the nodules were formed by projections of the epithelium from the mucosa to the submucosa, forming tubules lined by a single layer of columnar epithelium with high cellularity and rare goblet cells, characterizing epithelial hyperplasia of the crypts. The adults and eggs, observed in the lumen of the tubules, were morphologically compatible with Strongyloides spp. Numerous larvae were also observed in the interstitium adjacent to the nodule. There was mild lymphocytic infiltration weaving and bordering the hyperplastic nodules. The observed histological changes are consistent with those described in infection by S. tumefaciens (Bowman et al. 2002). Although the specific identification in this case is still in progress, this pattern of tissue response has not been described in infection by other Strongyloides species in domestic cats. The data from this study indicate that the possibility of infection by this species in cats in Brazil should be investigated.

ars veterinária

HIPERPLASIA EPITELIAL NODULAR NO CÓLON DE FELINOS ASSOCIADA À ESTRONGILOIDOSE NA REGIÃO AMAZÔNICA, PARÁ, BRASIL / COLONIC EPITHELIAL NODULAR HYPERPLASIA ASSOCIATED WITH STRONGYLOIDOSIS IN CATS IN THE AMAZON REGION, PARÁ, BRAZIL