ResumoNeste trabalho estudou-se a participação do Toxoplasma gondii e Neospora caninum na etiologia de sinais neurológicos em cães. Foram utilizados 98 cães com distúrbios neurológicos provenientes da área urbana divididos em dois grupos: Grupo I constituído de 67 animais atendidos no período de 1987 a 1990 pelo Serviço de Neurologia Animal da Universidade Estadual de Londrina, onde se utilizaram os tecidos emblocados em parafina e Grupo II com 31 animais atendidos no período de 2000 a 2001 nesta mesma instituição. Os animais foram avaliados sorologicamente para pesquisa de anticorpos contra T. gondii e N. caninum. Os resultados da sorologia para T. gondii obtidos no grupo I e II foram 82,5% e 35.4%, respectivamente. Foram observadas lesões histológicas compatíveis com cinomose nos dois grupos. Cistos de T. gondii foram diagnosticados em dois cães através da histopatologia e imuno-histoquímica. A neosporose não foi diagnosticada em nenhum animal, provavelmente devido à procedência urbana dos animais estudados. Palavras chave: Neospora caninum, Toxoplasma gondii, sistema nervoso, cães, imuno-histoquímica. AbstractThe evolvement of Toxoplasma gondii and Neospora caninum on etiology of clinical-neurological signs in dogs was investigated in this work. Ninety-eight urban dogs with neurologic disturbances were divided into two groups: Group I consisted of 67 dogs examined by the Animal Neurologic Service of Universidade Estadual de Londrina, between 1987 and 1990. Group II consisted of 31 dogs examined on the same University between 2000 and 2001. Dogs were serological evaluated for evidence of T. gondii or N. caninum. The serological results for T. gondii were 82,5% and 35.4% on groups I and II, respectively. Histologic lesions compatible with distemper on the two groups were observed. T. gondii cysts were observed in two dogs by histopathology and immunohistochemistry. Neosporosis was not observed in these dogs, possibly because their urban origin.
Because Canine circovirus (CanineCV) is a new species of the genus Circovirus, several issues related to its epidemiology, pathogenesis and clinical disease remain unknown. Thus, this study aimed to perform the characterization of the first complete genome sequence of CanineCV detected in a dog with diarrhea in Brazil. A stool sample was collected of a ten-month-old female German Shepherd dog which had signs of intermittent hemorrhagic gastroenteritis, vomiting, and a history of eating raw pork. The complete CanineCV genome was sequenced by Next-Generation Sequencing. The sequence had 2,063 nucleotides, showed a typical genomic organization for circovirus, and was grouped with strain 214 described in the United States by phylogenetic analysis. One amino acid change was found in the replicase protein, and because of that it was considered unique to CanineCV. Therefore, the characterization of the complete genome of Brazilian CanineCV can be used in future studies of molecular epidemiology, pathogenesis and development of diagnostic tools for the prevention and control of this disease.
ABSTRACT:Oral hairy leukoplakia is a lesion that generally occurs within the tongue. It is characterized by a white patch on the side of the tongue with a corrugated or hairy appearance. The OHL affects patients with HIV infection and has characteristics that differ from oral leukoplakia. The etiology of oral hairy leukoplakia is linked to the infection of epithelial cells by Epstein-Barr virus. The objective of this paper was to report a case of atypical oral hairy leukoplakia in a patient with HIV infection. A male patient, 43 years old, was hospitalized complaining of abdominal pain and symptoms suggestive of jaundice. A white plaque was identified on his tongue during a clinical examination. That lesion was painless and not removable by scraping. A liquid-based cytology was performed and cytological analysis revealed structures suggestive of Candida sp. and cytological changes consistent with oral hairy leukoplakia (Cowdry type A inclusion bodies, and ground-glass nuclei). Exfoliative cytology is a reliable test that can be used by a dentist and otolaryngologists to determine the diagnosis of atypical cases of oral hairy leukoplakia.
Equine pythiosis is a common disease in animals that graze in flooded areas of tropical and subtropical regions and it is caused by the oomycete Pythium insidiosum. The lesions are characterized by a granulomatous appearance of uneven surface and with fistulae, associated with fibrin-oozing bloody and caseous necrotic materials called kunkers, which are usually located in the abdomen or distal extremities. In this study, a case of pythiosis location of rhinofacial pythiosis on a hinny sent to the Pathology Laboratory at the Veterinary School Hospital (FURB) was here described. Necrotic foci surrounded by infiltrates of eosinophils, neutrophils, macrophages and plentiful fibrous connective tissue were observed in tissue samples from the region of nasal turbinates and face. Sparsely septate hyphae filaments were identified in the center of the necrotic areas. With the Grocott’s methenamine silver staining, branched hyphae septate were also observed within the necrotic foci, thus confirming the diagnosis of rhinofacial pythiosis in a hinny.
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