Pathological Characterization of Pulmonary Lesion And Identification of Associated Bacteria and Parasite in Sheep and Goat at Dessie Municipal Abattoir, Northeast Ethiopia
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Date
2023
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Addis Ababa University
Abstract
Lung is susceptible and vulnerable to many infectious and non-infectious agents. A cross-sectional study design was conducted from December 2022 and May 2023 on major pulmonary lesion of sheep and goat slaughtered at Dessie municipal abattoir with the objective of characterizing the pulmonary pathological lesions, and isolating and identifying potential aerobic bacteria and parasite from pneumonic lung. A total of 420 (302 sheep and 118 goats) were examined for pulmonary lesions using standard techniques. Additionally, detailed histopathological investigation was also conducted on purposively selected lung lesions. Besides, pneumonic lesions were subjected to bacteriological and parasitological analysis. The overall abattoir prevalence of pulmonary abnormalities in sheep and goat was 341 (81.2%). The common gross lesions encountered were Pneumonia (55.5%), emphysema (7.1%), atelectasis (3.3%), Hydatid cyst (4.3%), congestion (2.4%), haemorrhage (3.1%), adhesion (0.7%), Melanosis (0.9%), and Bronchoectasis (0.7%). Pneumonia, hydatidosis, and pulmonary emphysema were significantly associated (p<0.05) with animal age groups. In the current studies, pneumonia was the most common disorder, accounting for 233 (55.5%). Dictyocaulus filaria (47.7%), Mullerius capillaries (23.2%) and Protostrongylus rufescens (17.16%) were isolated lung worm parasites. Whereas E. coli (20.6%), Klebsiella Pneumoniae (12.7%), Mannheimia haemolytica (10.8%), Streptococcus species (4.9%), Staphylococcus aurous (7.8%) and Pasteurella multocida (2.9%), Pseudomonas (6.9%), Proteus (1.9%), Cornybacterium (1%) were the isolated bacteria. Additionally, 18 (4.3%) Hydatid cysts were identified. The pulmonary lesion of sheep and goats in the study are relatively high prevalent and therefore, have great health and economic impacts. To formulate feasible and affordable control measures, more research on the causes of problems of the respiratory organs, as well as the isolation and identification of both aerobic and anaerobic bacteria, viruses, and fungi, is necessary.
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Keywords
Bacteria, Histopathology, Parasite, Pneumonia, Pulmonary Lesion, Sheep and Goats