PATHOMORPHOLOGICAL STUDIES ON LUNG LESIONS IN SLAUGHTERED GOATS
| dc.contributor.advisor | ANNAPURNA, P (MAJOR) | |
| dc.contributor.advisor | RAMA DEVI, V | |
| dc.contributor.advisor | SRINIVASA RAO, T | |
| dc.contributor.author | SIREESHA, VADDIPALLI | |
| dc.date.accessioned | 2020-07-10T06:59:30Z | |
| dc.date.available | 2020-07-10T06:59:30Z | |
| dc.date.issued | 2019-12 | |
| dc.description | THESES | en_US |
| dc.description.abstract | The present study on lung lesions in slaughtered goats (Capra hircus) was undertaken to know the incidence, to describe the gross and histopathological changes associated with the lesions and to isolate various bacterial agents in possible cases. A total of 610 non-descriptive goats of either sex and of different age groups from various slaughter houses located in and around Vijayawada and from animals necropsied in the Department of Veterinary Pathology, N.T.R. College of Veterinary Science, Gannavaram were screened for the presence of gross abnormalities of lungs and representative samples were collected from lung lesions for further studies. Out of 610 lungs screened, 130 (21.31%) lungs revealed definite lesions on gross and histopathological examination, that were broadly grouped into abnormalities of inflation 24 (18.46%), circulatory disturbances 27 (20.77%), inflammatory changes 71 (54.61%), neoplastic conditions 05 (3.85%) and miscellaneous conditions 03 (2.31%). Abnormalities of inflation consisted of emphysema (11.54%) and atelectasis (6.92%). Circulatory disturbances comprised of congestion and hemorrhage (14.62%) and edema (6.15%). Inflammatory changes comprised of pneumonia (53.84%) and bronchitis (0.77%). Pneumonia was categorized into bronchopneumonia (46.92%), interstitial pneumonia (6.15%) and granulomatous pneumonia (0.77%). Bronchopneumonia was subdivided into suppurative (30.77%) and fibrinous (16.15%) types. Suppurative bronchopneumonia occurred as acute and chronic types. Acute type was characterized by cranioventral consolidation and mucopurulent exudates or mucoid plugs in airways on cut section. Histopathologically, predominantly neutrophilic exudate in alveoli, bronchi and bronchioles was noticed. Chronic type revealed cranioventral consolidation and multiple purulent foci grossly and on cut section. Microscopically, mononuclear cell infiltration within alveoli and in airways, abscesses and hyperplasia of BALT were noticed. In fibrinous bronchopneumonia, whitish fibrinous deposits were seen on the lungs apart from cranioventral consolidation. Adhesions were seen in some cases. Microscopically, fibrinocellular exudates within alveoli and in airways and fibrinous pleuritis were observed. In interstitial pneumonia, lungs were pale and showed rib impressions on the surface grossly. Cut section showed meaty appearance. Histopathologically, distortion of alveoli and thickened alveolar septa with mononuclear cell infiltration were seen. Granulomatous pneumonia was seen in one case, that showed a single firm nodule grossly and yellowish grey, fleshy mass on cut section of the nodule. Microscopically, a collection of mononuclear cells, epithelioid cells and a few Langhan’s giant cells encircled by fibrous connective tissue was observed. No bacterial, fungal, parasitic or foreign body etiology was noticed. A single case of bronchitis was seen, that showed creamy white nodules on right apical lobe grossly. Microscopically, chronic bronchitis that showed dilated bronchi with hyperplastic mucosa and mononuclear cell infiltration was seen. The neoplastic conditions consisted of jaagsiekte or ovine pulmonary adenocarcinoma (3.85%) that revealed either firm nodules of varying sizes on the lung or extensive involvement of most of the lobe and greyish moist surface and meaty appearance on cut section. Histopathologically, hypertrophy and hyperplasia of alveolar epithelium was noticed resembling jaagsiekte/ ovine pulmonary adenocarcinoma of sheep. Miscellaneous conditions comprised of pulmonary fasciolosis (0.77%) and goat pox (1.54%). Fasciolosis due to an aberrant migration of fluke was seen in a single case that revealed dark linear hemorrhagic tracts on the lungs grossly and on cut section. Histopathologically, fibrino-hemorrhagic tracts that contained cut section of a degenerated trematode surrounded by necrotic cellular debris, erythrocytes and fibrinocellular exudate were noticed. In goat pox, characteristic stages of pox were noticed on the skin, all over the body but mostly around the oral cavity, on the ears and scrotum. Histopathologically, skin lesions consisted of large intracytoplasmic eosinophilic inclusion bodies within epithelial cells and a few cells that resembled sheep pox cells in the dermis. Lung showed few macules, numerous papules and few pustules subpleurally. The microscopic findings were interstitial pneumonia and characteristic cells with vacuolated nuclei and marginated chromatin suggestive of sheep pox cells within the alveoli. Bacteriological studies on 57 lung samples of goats yielded pathogenic bacteria from 53 samples. Of these, 5 types of bacteria were obtained in pure culture from 45 samples viz. Staphylococcus spp. (37.73%), E. coli (30.19%), Pasteurella spp. (7.55%), Klebsiella spp. (7.55%) and Pseudomonas spp. (1.89%) while mixed infections were obtained in 8 samples in a combination of Staphylococcus spp. with E. coli (11.32%) and with Pasteurella spp. (3.77%). In the present study, pneumonia was the major pathological condition affecting goats in the area under study and Staphylococcus spp. was the most predominant bacteria isolated. | en_US |
| dc.identifier.uri | http://krishikosh.egranth.ac.in/handle/1/5810148990 | |
| dc.keywords | LUNG LESIONS;SLAUGHTERED GOATS;PATHOMORPHOLOGICAL STUDIES | en_US |
| dc.language.iso | en | en_US |
| dc.pages | 112 | en_US |
| dc.publisher | SRI VENKATESWARA VETERINARY UNIVERSITY TIRUPATI - 517502. (A.P.) INDIA | en_US |
| dc.sub | Veterinary Pathology | en_US |
| dc.subject | null | en_US |
| dc.theme | PATHOMORPHOLOGICAL STUDIES ON LUNG LESIONS IN SLAUGHTERED GOATS | en_US |
| dc.these.type | M.V.Sc. | en_US |
| dc.title | PATHOMORPHOLOGICAL STUDIES ON LUNG LESIONS IN SLAUGHTERED GOATS | en_US |
| dc.type | Thesis | en_US |