RESUMO O objetivo deste trabalho foi descrever o quadro clínico de um cão com suspeita de leptospirose e os resultados dos exames específicos e complementares para leptospirose. A anamnese revelou que o animal apresentou episódios de vômito e dificuldade em apreender alimentos sólidos e líquidos. No exame clínico foi constatada desidratação de 5-7%, sensibilidade abdominal, hematoemese, melena, diarréia, necrose na língua, sialorréia e dificuldade de deglutição. Todos os exames considerados específicos, bacteriológico, direto da urina em microscópio de campo escuro, soroaglutinação microscópica e imunoperoxidase indireta do rim apresentaram resultados positivos. A estirpe de Leptospira isolada foi identificada como sorovar Canicola. Os exames complementares revelaram leucocitose com neutrofilia, hipocalcemia, hipoalbuminemia e valores séricos de uréia, creatinina e fosfatos acima dos valores normais enquanto a urinálise revelou proteinúria, leucocitúria e presença de células renais. As alterações renais encontradas no HE foram nefrite intersticial crônica e glomerulite com espessamento da membrana basal. Os sinais clínicos observados e os resultados dos exames laboratoriais indicaram um quadro predominantemente renal, compatível com a infecção pelo sorovar Canicola.

ABSTRACT The purpose of this study was to describe the clinical features of a dog with leptospirosis suspicion, and results of specific and complementary laboratorial tests for leptospirosis. Anamnesis revealed that the animal presented vomiting, difficulty to apprehend both solid and liquid food. In the clinical examination, there was verified dehydration from 5 to 7%, hematoemesis, melena, diarrhea, tong necrosis, sialorrhea and difficulty swallowing. All the specific tests, bacteriologic, direct examination of urine in dark field microscopy, microscopic agglutination test and indirect immunoperoxidase, were positive. The Leptospira strain isolated was identified as serovar Canicola. The complementary tests revealed leukocytosis with neutrophilia, hypocalcemia, hypalbuminemia and blood values of urea, creatinine and phosphates over the normal values while urinalysis showed proteinuria, leukocyturia and presence of kidney cells. Kidney lesions found in HE were chronic interstitial nephritis and glomerulitis with thickened basement membrane. The clinical signs and the results of laboratorial tests found in this study indicated to predominantly to renal feature, consistent with an infection by serovar Canicola.

Tissue fragments from 17 non-aborted and 93 aborted fetuses were histologically studied. No histological lesions were observed in non-aborted fetuses, and 51.6% of the aborted fetuses presented histological lesions. The main lesions were: focal gliosis and mononuclear infiltrate in liver, CNS, lungs and muscular tissues.

O presente estudo teve por objetivo investigar as alterações ultraestruturais da mucosa intestinal e do tecido linfóide associado na inoculação experimental de Cryptosporidium sp. Doze leitões foram inoculados experimentalmente por via oral com 1×10(6) oocistos e sacrificados 3, 6, 9 e 12 dias depois. Ao exame ultraestrutural de células intestinais observou-se espessamento e irregularidade de microvilosidades, citoplasma vacuolizado e com protrusões, edema mitocondrial, hipertrofia de organelas citoplasmáticas e do núcleo. Nas placas de Peyer observou-se ocasionalmente mitose de células linfóides, verificando-se maior número de células blásticas.

The aim of this work was to determine ultrastructural changes on the intestinal mucosa and associated lymphoid tissues after an experimental infection with Cryptosporidium sp. Twelve piglets dosed orally with 1×10(6) oocysts were slaughtered on days 3, 6, 9 and 12 after inoculation. The ultrastructural lesions in the intestinal cells were irregular with thickened microvilli, cytoplasmic protrusions and vacuolation, swollen mitochondria, hypertrophic organelles and nuclei. The lymphocytes of the Peyer’s patches occasionally were mitotic with a larger number of lymphoblasts in the inoculated animals.