PATHOMORPHOLOGICAL STUDIES ON SHEEP LUNGS
| dc.contributor.advisor | MADHURI, D(MAJOR) | |
| dc.contributor.advisor | ANJANEYULU, Y | |
| dc.contributor.advisor | GOPAL REDDY, A | |
| dc.contributor.author | SANDHYA, M | |
| dc.date.accessioned | 2018-10-25T09:44:27Z | |
| dc.date.available | 2018-10-25T09:44:27Z | |
| dc.date.issued | 2009-01 | |
| dc.description | THESES | en_US |
| dc.description.abstract | ABSTRACT: Multiple etiological and environmental factors contribute to high susceptibility of sheep to pneumonia and pose trouble in control of this malady to sheep farming community. In present investigation, 1713 lungs were collected from slaughterhouses in and around Hyderabad. On detailed gross pathological examination, pneumonia was encountered in 248 lungs. The histopathological examination of lungs revealed interstitial pneumonia (29.03.%), fibrinous pneumonia (27.41%), broncho-pneumonia (22.58%), granulomatous pneumonia (9.67%), suppurative pneumonia (5.24%), Maedi (4.83%), aspiration pneumonia (0.80%), Jaagsiekte (0.40%) and other common conditions like congestion, edema, haemorrhages, emphysema, bronchiectasis etc in (2.01%) cases respectively. In interstitial pneumonia lungs appeared voluminous and enlarged. Histologically, marked thickening of the interalveolar septa and interlobular septa due to haemorrhages and infiltrations of polymorphonuclear cells and mononuclear cells observed. In fibrinous pneumonia lungs were hyperemic and haemorrhagic, stringy, copious exudate was noticed in the bronchioles. Microscopically, fibrinous exudate mixed with neutrophils and macrophages were seen in the alveolar lumen. Bronchopneumonia was characterized by pulmonary tissue showing patchy to diffuse areas of consolidation ranging from red to grayish colour prominent on cranial lobes and copious bronchial exudation. Microscopically, lining epithelium of the bronchioles were hyperplastic with varying amount of exudation in the lumen. Marked mononuclear cells in bronchiolar sub-mucosa and in adjoining alveoli was noted. Granulomatous pneumonia caused by Mycobacterium was noticed as tuberculosis. Localized lesions with caseation were seen in upper lobes of lungs. Histological examination revealed characteristic granulomatous inflammatory reaction forming both caseating and non caseating tubercle. In suppurative pneumonia lungs showed purulent nodules and microscopically heavy neutrophils and cellular debris was observed in the lumen of alveoli. In Maedi, lesions were of interstitial pneumonia type. The lungs were pale and consolidations were prominent. Microscopically, large lymphoid cell aggregates around most of the bronchi, bronchioles and blood vessels was the prominent lesion noticed in all the Maedi affected lung sections. In aspiration pneumonia lungs showed congestion and consolidation. Microscopically the pleura were thickened, edematous and congested. The parenchymatous tissue around the foreign debris was necrosed. Jaagsiekte was characterized by lung consolidation with a few grayish white nodular foci. Histologically normal thin alveolar cells were replaced by cuboidal or columnar cells with papillary projections into the alveoli. Microbial isolation was attempted from some pneumonic cases. The major pathogenic bacteria isolated from bronchopneumonia were E. coli, Pasteurella multocida and Staphylococcus aureus. In fibrinous pneumonic cases pathogenic bacteria isolated were Staphylococcus, E.coli, Pasteurella multocida and Mycobacterium, E.coli, Staphylococcus and Pasteurella multocida were isolated in 16 of 107 cases of interstitial pneumonia. Pathogenic bacteria Mycobacterium tuberculosis was isolated in cases of granulomatous pneumonia. The results of the present study suggested pneumonia could be one of the important cause of death in sheep in Hyderabad. Secondly incidence of granulomatous pneumonia due to mycobacterium spp. has been recorded in 16 lungs (28.57%) suggesting prevalence of TB in sheep in Hyderabad. As this disease causes huge economic losses due to decline in lifetime productivity and death of animal in advance stage of disease. Therefore further studies are to be done to study the seroprevalence of tuberculosis infection in sheep. | en_US |
| dc.identifier.uri | http://krishikosh.egranth.ac.in/handle/1/5810082132 | |
| dc.keywords | SHEEP LUNGS;PATHOMORPHOLOGICAL STUDIES | en_US |
| dc.language.iso | en | en_US |
| dc.pages | 99 | en_US |
| dc.publisher | SRI VENKATESWARA VETERINARY UNIVERSITY TIRUPATI - 517 502. (A.P.) INDIA | en_US |
| dc.sub | Veterinary Pathology | en_US |
| dc.subject | null | en_US |
| dc.theme | PATHOMORPHOLOGICAL STUDIES ON SHEEP LUNGS | en_US |
| dc.these.type | M.V.Sc. | en_US |
| dc.title | PATHOMORPHOLOGICAL STUDIES ON SHEEP LUNGS | en_US |
| dc.type | Thesis | en_US |