Department of Veterinary Pathology, College of Veterinary And Animal Science, Rajasthan University of Veterinary and Animal Sciences, Bikaner-334001 (Rajasthan)
Online published on 19 December, 2013.
Occurrence and pathology of dermatitis in poultry were studied in 1386 poultry of different age, sex and breeds, out of those 304 samples were positive for dermatitis. This investigation revealed that the overall occurrence of dermatitis was 21.93 per cent in Rajasthan state. Various forms of dermatitis were observed viz. perivascular dermatitis (9.87 per cent), interface dermatitis (7.57 per cent), vasculitis (4.61 per cent), nodular dermatitis (3.62 per cent), diffuse dermatitis (12.17 per cent), intraepidermal vesicular and pustular dermatitis (8.22 per cent), subepidermal vesicular and pustular dermatitis (6.91 per cent), panniculitis (8.88 per cent), perifolliculitis, folliculitis and furunculosis (10.53 per cent), ulcerative dermatitis (14.47 per cent), interstial dermatitis (4.93 per cent), fibrosing dermatitis (5.92 per cent), atrophic dermatitis (2.30 percent). Histopathological changes revealed presence of inflammatory infiltration arround the blood vessels, at dermo-epidermal junction, in one wall of the blood vessels, in the form of the clusters, diffusely spread in dermis, in epidermis, under epidermis with dermo-epidermal separation and vesicle formation, In subcutaneous fat tissue, around feather follicle, in the wall and lumen of the follicle and with rupture of follicular wall, in destruction of epidermis with presence of cellular debris in lesion, in the interstitial spaces of collagen bundles of the dermis, with fibrosis of dermal tissue and with the atrophy of dermis and epidermis respectively in different types of dermatitis described above. Bacteriological studies indicated that the various bacteria isolated from cases of dermatitis were Staphylococcus aureus, Bacillus sp. and E. coli.
