Screening pathological study for pulmonary lesions in slaughtered cattle in Al-Najaf abattoir

This study was conducted in Al-Najaf slaughterhouse, during the period from January to March 2019 to investigate and classify the microscopic changes of pulmonary lesions and comparison between the percentage of different lesions in lung of slaughtered young and adult cattle. Two hundred and twenty cattle were postmortem examined, The specimens from their lung were collected and preserved in buffered formalin 10% and routine staining with H&E stain and special staining with Masson's Trichrome stain were achieved.The results of the microscopic study showed that there were variable pulmonary affections in slaughtered cattle. The microscopic investigation of the lung specimens stained with hematoxylin and eosin stain showed variation in the occurrence of different microscopic lung lesions, arranged from high percentages such as pleural changes (94.5%), bronchopneumonia (68.5%), pneumonia (57%), emphysema (44%), atelectasis (42%), fibrosis (37%), angiogenesis (35%), congestion (32.5%), consolidation (19.5%), haemorrhage (16.5%), hemosiderin deposition (15.5%), hyperplasia (15%) and desquamation (10%) to moderate to low percentages such as tuberculosis (5.5%), hydropic degeneration (4.5%), oedema (4.5%), hydatid cysts (4%), sclerosis (1.5%), abscesses (1%), metaplasia (0.5%) and thrombosis (0.5%). The main conclusions of our study revealed that there were different pulmonary lesions could be diagnosed as well as there was significant differences between the prevalence of lung microscopic lesions between young and adult cattle