Pneumonia enzoótica em javalis (Sus scrofa)

Abstract

RESUMO.-O objetivo desse estudo foi descrever o quadro clínico e epidemiológico, os achados patológicos, bacteriológicos e imuno-histoquímicos de um surto de pneumonia em uma granja de Javalis do Distrito Federal, Brasil. Em um período de cinco meses, morreram 90 javalis. Desses, 63 tinham lesões pulmonares. Clinicamente apresentavam atraso no desenvolvimento corporal, diminuição do apetite, letargia, tosse e dificuldade respiratória, principalmente quando movimentados. Constatou-se elevação da temperatura, 40 o C em média. Na auscultação, havia crepitações e estertores pulmonares de intensidade moderada. As alterações macroscópicas nos pulmões analisados eram típicas de broncopneumonia lobular. As lesões caracterizavam-se por consolidação crânio-ventral na maioria dos pulmões. A coloração variava de difusamente vermelho-escuro a um padrão mosaico (ló-bulos vermelho-escuros intercalados por lóbulos cinzas) ou difusamente acinzentados. Na maioria dos pulmões observou-se exsudato mucopurulento na luz dos brônquios e fluindo do parênquima. Histologicamente, as alterações eram de broncopneumonia purulenta e histiocitária com focos de necrose. Em alguns animais havia também hiperplasia do BALT e, na maioria dos animais, infiltração The aim of this paper is to describe the clinical, epidemiological, pathological, bacteriological and immunohistochemical aspects of a pneumonia outbreak in a wild pig farm in the Distrito Federal, Brazil. Ninety wild pigs died in a period of five months, and 63 of these had pulmonary lesions. Clinically, the pigs presented reduced growth rate, anorexia, lethargy, cough and dyspnea, especially after they were moved. High body temperature (40 o C in average) was verified in some animals. Auscultation revealed moderate pulmonary crepitation and stertors. Pulmonary gross lesions were typical of lobular bronchopneumonia. Lung lesions were characterized by ventral-cranial consolidation in the majority of the cases. The color of affected pulmonary areas varied from diffuse dark red to mosaic pattern (dark red lobule intercalate by grayish lobule) or diffusely grayish. The majority of the lungs had mucopurulent exsudate in the bronchial lumen that also drained from the parenchyma cut surface. Upon microscopy, the changes were characterized by purulent and histiocytic bronchopneumonia with necrotic foci. In some animals, there was BALT hyperplasia associated with perivascular and peribronchial plasma cells and lymphocytes infiltration in most of these cases. Bordetella bronchiseptica and Streptococcus spp. were the most frequently isolated bacteria. Immunohistochemistry evaluation demonstrated Mycoplasma hyopneumoniae on the luminal surface of bronchial and bronchiolar epithelial cells, and the DNA of bacteria was detected by PCR. This is the first report of bronchopneumonia in wild boars associated with M. hyopneumoniae infection.

Postmortem findings in collared peccaries raised in captivity in northeastern Brazil

“…The clinical and macroscopic status was similar to that reported by Ecco et al (2009) in boars (Sus scrofa) that were affected by bacterial pneumonia. S. aureus is the predominant agent in abscesses of the lungs .…”

Bacterial Pneumonia in Captive Wild Boars in Southern Brazil - Etiological and Pathological Causes

“…A high proportion of lung pathogens were detected by bacteriology and PCR in the slaughtered captive wild boars of our study. Mycoplasma hyopneumoniae was the most prevalent bacterium detected in our study, representing 58.7% of the lungs, which has already been detected in wild boars with clinical respiratory symptoms by other authors [11,20,40]. However, it was expected that the detection of M. hyopneumoniae by PCR would be related with histopathological lesions suggestive of its infection in order to associate the bacterium with lung lesions.…”

“…There are few studies on the etiology of pneumonia in wild boars [4,17,41,48], especially in Brazil [20,40,43]. Moreover, we did not find references of respiratory diseases in captive wild boars raised in Brazil, except for a clinical report which demonstrated the occurrence of lung lesions characterized by cranioventral consolidation and pulmonary gross lesions typical of lobular bronchopneumonia associated with M. hyopneumoniae in wild boars [11]. Additionally, Biondo et al [5], performed the first report of a reassortant human-like H1N2 Influenza virus infection in captive wild boars in Brazil.…”

Enfermidades de cutias (Dasyprocta aguti) criadas em cativeiro diagnosticadas pelo exame anatomopatológico

“…A sua utilização cada vez mais comum nesses animais vem demonstrando que doenças antes consideradas raras ocorrem com relativa frequência em animais criados em cativeiro e em vida livre (Silva et al 2003, Fernandes & Marcolino 2007, Lucioli et al 2008, Ecco et al 2009). …”