PATHOLOGICAL STUDIES ON THE COMMONLY OCCURRING DISEASES IN BOVINE CALVES

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dc.contributor.advisorPatil, R.D.
dc.contributor.authorMahajan, Shagun
dc.date.accessioned2019-02-01T10:59:03Z
dc.date.available2019-02-01T10:59:03Z
dc.date.issued2017-11-06
dc.description.abstractThe present study was conducted to determine the prevalence and the etiolpathology responsible for bovine calf mortality in Himachal Pradesh. A total of 41 nasal swabs and 185 faecal samples were collected from dead, clinically sick and non-clinical (healthy) animals. Necropsy of 30 calves (17 Males, 13 Females) of various age groups (< 1M, 1- 3M, 3-6M, 6-9M and 9-12M) was performed during August, 2015 to April, 2016. The pneumo-enteritis was the major cause of death in 63% of calves. Grossly,out of 30 calves, 8(26.6%), 8 (26.6%), 3 (10%) and 4 (13.3%) calves showed bronchopneumonia, interstitial pneumonia, pulmonary congestion and pulmonary congestion and edema respectively. However, 2(6.67 %) and 20 (66.7%) animals showed haemorrhagic enteritis and catarrhal enteritis respectively. Histopathologically, in bronchopneumonia cases, the bronchioles and the alveolar lumen were filled with polymorphonuclear cells. Staphylococcus aureus was isolated from the lungs showing sub-acute to chronic abscesses, whereas, in interstitial pneumonia thickening of inter-alveolar septa due to mononuclearcells infiltration, hyperplasia of the bronchial and bronchiolar epithelium with peribronchial and peribronchiolar lymphoid proliferation. Intestine revealed presence of macroschizonts and microschizonts of coccidian with infiltration of inflammatory cells. Shortening and fusion of villi, desquamation and sloughing of villi, apoptosis and necrosis with infiltration of inflammatory cells in mucosa and submucosa indicative of viral induced enteritis.The serotype (O7, 088 and O118) were isolated from necropsy cases and major parasite wasEimeriabovis(28 % in clinically sick, 17.55 % in healthy and 3.44 % in dead calves) followed by Strongyloides eggs (20.6 % in dead and 3.81% in healthycalves) and Neoascaris vitulorum (8%) in clinically sick calves. This is also suggestive that parasitism is also responsible for playing important role in calf mortality.Ciprofloxacin was found to be the most sensitive antibiotic followed by Gentamicin and Oxytetracycline was the most resistant drug. The present study revealed that pneumo-enteritis is the major cause of calf mortality with its peak occurrence at 6-9 months of age group.en_US
dc.identifier.urihttp://krishikosh.egranth.ac.in/handle/1/5810093285
dc.keywordsBovineen_US
dc.language.isoenen_US
dc.pages97en_US
dc.publisherCSKHPKV, Palampuren_US
dc.subVeterinary Pathologyen_US
dc.subjectnullen_US
dc.themeCommonly occurring diseases in Bovine calvesen_US
dc.these.typeM.V.Sc.en_US
dc.titlePATHOLOGICAL STUDIES ON THE COMMONLY OCCURRING DISEASES IN BOVINE CALVESen_US
dc.typeThesisen_US
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