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Subject: Veterinary Pathology × Author: ANILKUMAR, R × End date: 1996 × Start date: 1996 × Thesis Type: M.V.Sc. ×
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    ThesisItemOpen Access
    PREVALENCE AND PATHOLOGY OF DERMATOLOGICAL DISORDERS IN CATTLE
    (COLLEGE OF VETERINARY AND ANIMAL SCIENCE,MANNUTHY, 1996) ANILKUMAR, R; Rajan, A
    A study was undertaken to assess the prevalence and pathology of dermatological disorders encountered in cattle in Kerala. To study the prevalence of various types of skin disorders data were collected from the Disease Suiveillence Report published by the Directorate of Animal Husbandly during the period 1989-1993. The various skin disorders encountered according to this data were tail necrosis (1.44 per cent), cutaneous mycosis (10.58 per cent), Eczematosis (6.09 per cent), pox (4.75 per cent), tick infestation (37.22 per cent), lice infestation (25.72 per cent), mangy dermatitis (13.82 per cent), wart (0.36 per cent),. In this study tick infestation was found to be highly prevalent. During the course of this investigation skin biopsies collected from 97 cattle were subjected to detailed gross and histopathological examination. They were classified as Cutaneous ulceration (22.68 per cent). Fly bite dermatitis (15.46 per cent), Decubitus ulcers (12.47 per cent), Hyperkeratosis (9.3 per cent), Papillomatosis (9.27 per cent), Hypertrichosis (8.25 per cent), Ectoparasitic injuiy (6.19 per cent). Teat lesions (6.19 per cent). Fibroma (2.07 per cent), Dermatophilosis (1.03 per cent). Squamous cell carcinoma (1.03 per cent), and Fibrosarcoma (1.03 per cent). Cutaneous ulceration was the most common disorder encountered and Biopsies revealed epidermal lysis. In fifteen animals, fly bite dermatitis was noticed with greyish white necrotic papules and wheals on the neck, shotrlder, ears and around eyes. Perivasctilar changes were seen microscopieally. Nme cases of hyperkeratosis were studied which may be associated with hypovitaminosis A. Udder and teat papillomatosis was encottntered in nine animals with ballooning degeneration and clumping of keratohyalin granules microscopically. Eight crossbred cattle recovered from the foot and mouth disease had hypertnchosis. Hair coat was shaggy and wavy Ectoparasitic injury was eneountered in cattle mainly due Boophilus infestation. Teat lesions encountered were mainly due to traumatic injury and chapping. Two cases of fibroma and one case of fibrosarcoma were encountered on the teat of cattle. A growth on the vulval region was diagnosed as squamous cell carcinoma. An experimental study on the cutaneous hypersensitivity reaction in cattle to PHA, 2,4-DNCB and BCG was carried out. Mast cell response to these mitogens was also studied. Effect of Agropesticides Furadan and BHC on local application on the skin of cahes were studied. Dermatosis was the characteristic response. The need for taking care to avoid pesticide contamination on the skin of animals was stressed.