Abstract
The current study was conducted on 110 lung samples from 2 - 3 years old imported beef cattle slaughtered at the Middle East abattoirs of Abu-Simbel city –Aswan Governorate- Egypt, in the period from July 2017 to March 2018. The aim of the present work was to characterize and detect the incidence rate of the pulmonary affections. During the postmortem examination, the pulmonary affections were recorded grossly and specimens were taken for histopathological examinations. The histopathological examinations revealed that 36 samples (32.7%) showed fibrinous pleuropneumonia. According to the characteristic features of lesions in the microscopical studies, we grouped them into (a) Acute fibrinous pleuropneumonia in 31cases (28.1 %) and (b) Organized fibrinous pleuropneumonia in 5 cases (4.5 %). The causes of these affection and their importance were discussed.
Highlights
Pneumonia is defined as the inflammation of pulmonary parenchyma and it is usually accompanied by inflammation of the bronchioles (Bronchopneumonia) and/or by pleurisy (Blood et al, 1983)
Between bacteriological and histopathological findings in bovine fibrinous pneumonia (Schiefer et al, 1978), as Bovine respiratory disease (BRD) including shipping fever, which is indicated by fibrinous pneumonia or pleuritis is usually caused by Mannheimia haemolytica (Singh et al, 2011) and Pasteurella multocida (Welsh et al, 2004 and Caswell and Williams, 2016), the above mentioned micro-organisms are the most common bacteria isolating from animals with BRD (Singh et al, 2011)
M. haemolytica as well as Mycoplasma mycoides, are the micro-organisms frequently related to fibrinous pathological condition (Jubb et al, 2007)
Summary
Pneumonia is defined as the inflammation of pulmonary parenchyma and it is usually accompanied by inflammation of the bronchioles (Bronchopneumonia) and/or by pleurisy (pleuropneumonia) (Blood et al, 1983). Fibrinous pleuropneumonia is characterized by congestion and consolidation of lungs and is usually accompanied by pleuritis. The pulmonary lesions is formed in a similar way regardless of the type of etiological agent. It include various stages of congestion, red hepatization, grey hepatization resolution. (Schiefer et al, 1978 and Haridy, 2003) The latter stages of fibrinous pleuropneumonia representing the organized fibrinous pleuropneumonia type (Jensen et al, 1976). Areas of fibrinous pleuropneumonia were often confined by fibrous tissue forming nodules
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