Navegando por Assunto "Patologia veterinária"

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Acesso aberto (Open Access)
Epidemiological, clinical and pathological aspects of an outbreak of periodontitis in sheep
(Universidade Federal do Pará, 2016-11) SILVA, Natália da Silva e; SILVEIRA, José Alcides Sarmento da; LIMA, Danillo Henrique da Silva; BOMJARDIM, Henrique dos Anjos; BRITO, Marilene de Farias; BORSANELLI, Ana Carolina; DUTRA, Iveraldo dos Santos; BARBOSA NETO, José Diomedes
The objective of this study was to describe the epidemiological, clinical and pathological aspects of an outbreak of periodontitis in sheep that occurred on a rural property in Benevides, in the state of Pará, Brazil. The first clinical signs of this disease in the herd - visible nodular swollen mandible - were observed about one month after the sheep began grazing on a recently renovated Panicum maximum cv. Massai pasture; the animals were also supplemented with elephant grass (Pennisetum purpureum). From the 545 adult Santa Ines, Dorper, Texel and crossbred sheep, 20 (3.7%) showed facial bulging, particularly of the mandible. These 20 sheep, which were generally over 36 months of age, had low body condition scores as well as dull and ruffled coats; many of them had loose or missing pre, upper or lower molars, showed the formation of abscesses and fistulas, exhibited pain upon palpation and had difficulty chewing. In the same herd, the prevalence of periodontal lesions at the premolars and molar teeth was evaluated via post-mortem examination of 39 young and 17 adult sheep. In 51.3% (20/39) of adolescents and in 100% of adults, periodontal lesions were found at least at one tooth of the dental arch, with unilateral or bilateral periodontal lesions at the maxillary and mandibular teeth. Histopathological analysis of 13 sheep revealed pyogranulomatous inflammation. The second and third maxillary premolars were the teeth that were most affected in young animals, whereas the third pre-molar and the molars, of the maxilla and mandible, were most often affected in adults. These lesions led to severe bone destruction, alterations in the dental arch, occlusion, tooth loss and periodontal abscesses. The epidemiological and clinic-pathological characteristics of this periodontitis outbreak, described here for the first time in sheep in Brazil, were similar to those for bovine periodontitis (“cara inchada”).
Acesso aberto (Open Access)
Surtos de Enteropatia Proliferativa Hemorrágica (Lawsonia intracelullaris) em suínos no Estado do Rio de Janeiro
(2008-03) FRANÇA, Ticiana do Nascimento; RIBEIRO, Carlos Torres; BEZERRA JÚNIOR, Pedro Soares; DÖBEREINER, Jürgen; CERQUEIRA, Valíria Duarte; PEIXOTO, Paulo Fernando de Vargas
Outbreaks of infection of swine with Lawsonia intracelullaris in the state of Rio de Janeiro are described. The symptomathology was characterized by bloody diarrhea with peracute course. Postmortem findings were pale organs and tissues, reticulate aspect of the ileum with its mucosa moderately thickened nad contained large amounts of partially coagulated blood. Histopathological examination revealed hyperplastic epithelial cell proliferation of the Lieberkühn crypts, sometimes associated with inflammatory and necrotic alterations. Immunohistochemistry demonstrated the presence of large amounts of bacteria in the cytoplasm of the cryptal epithelial cells. L. intracellularis was also seen by ultramicroscopic examination. These outbreaks occurred in 1987 and this is the first report of the disease in the state of Rio de Janeiro.