University of Khartoum

Pathological Changes in the Lungs of Slaughtered Sheep and Cattle in Khartoum State Abattoirs

Pathological Changes in the Lungs of Slaughtered Sheep and Cattle in Khartoum State Abattoirs

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Title: Pathological Changes in the Lungs of Slaughtered Sheep and Cattle in Khartoum State Abattoirs
Author: Elsiddig, Islam
Abstract: This study was conducted in khartoum slaughterhouses (El Sabaloga and El Kadarou), during the period 2002-2003 to investigate the condemnation causes of cattle and sheep lungs and associated lymph nodes. Three hundred animals (117 cattle and 183 sheep) were examined postmortem. Various causes of lung condemnations were recorded and compared with condemnation data collected from slaughterhouses records during the period 1998-2002. the results of the survey showed that specific and non-specific lung affections are high among slaughtered sheep and cattle and this matches well with the condemnation records of slaughterhouses in khartoum State. This indicates that pulmonary diseases may be prevalent in meat animals and should receive adequate attention. The condemnation records showed that out of 1717831 slaughtered sheep 15.47% were found to have pulmonary involvement. The main causes of lung condemnation record were: pneumonia (51.95%), aspirated blood (29.42%), congestion (9.53%), adhesion (5.59%) and abscess (3.27%). One case of tuberculosis was observed. The condemnations were high in March, September and October and low in june, August and November. On the other hand, out of 955336 cattle slaughtered 6.47% had lung affections. The lung condemnations were due to pneumonia(47.79%), adhesions (0.99%), congestion (1.24%), aspirated blood(49.75%) and abscesses (0.15%). Hydatid cysts were seen in (0.08%) of the condemned lungs and four cases (0.01%) showed typical lesions of tuberculosis. Condemnations due to pneumonia were high in September and low in February. Grossly the types of pneumonia observed were mainly bronchopneumonia (acute, suppurative and fibrinous) and interstitial pneumonia. These were confirmed histopathologically. Sections of four of the caseated nodules in cattle showed typical granulomatous lesions of tuberculosis, though no acid fast organisms were seen in sections stained with Ziehl Neelsen stain. However, impression smears from lymph nodes showed one positive case of acid fast bacilli. H&E sections from lungs with severe congestion or haemorrhage exhibited haemosidrin laden machrophages in association with chronic bronchitis, interstitial pneumonia and fibrosis. Perl’s prussian blue reaction was positive for iron. Other special stains were used in this study to verify and confirm various lesions and this was one of the main aims of this study. Vonkossa’s stain was used to confirm presence of calcium deposits. Collagen fibers (in cases of lung fibrosis) were with Van Gieson’s stain and with Masson’s trichrome stain. Verhoeff’s stain was utilized to demonstrate elastic fibers and Gordon and sweets stain was used to confirm presence of reticulin fibers.
URI: http://hdl.handle.net/123456789/8087
Date: 2015-04-02


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