Studies on prevalence, pathology and haemato- biochemical changes of stephanofilaral dermatitis in cattle in West Bengal
2007
Singh, K Surendrajit | Mukhopadhayay, S.K.
Studies on some aspect of stephanofilarial dermatitis in Kolkata and its suburbs were carried out form October 2000 to September 2001. During the study, 216 (17.28%) cattle were found to be affected out of 1250 indigenous cattle examined the for prevalence of stephanofilariasis in relation to area, age, sex and site of lesions were studied. Prevalence of stephanofilariasis was seen higher in males and in the age group of 4–5 years. The highest rate was observed during August. The neck region was affected in majority of cattle. Skin scraping examination revealed a small slender and whitish worm with crown like cephalic structure under the light microscopic. Examination of impressions smears from different lesions in cattle revealed sheathed and few unsheathed microfilariae. The gross changes in different stages of stephanofilarial dermatitis were circular patches of 5 cm of more with small haemorrhages and droplets of serum. Lesions of excoriation, leukoderma and couplet loss of hair and dry crust were observed. Hyperkeratosis, parakeratosis, acanthosis and longitudinal sections of parasites were found in the dermis infiltrated with inflammatory cells. Haematological studies of infected cattle revealed significant (P<0.05) decreases in Hb, PCV, TEC values, non-significant increase in lymphocyte counts and significant (P<0.05) increase in eosinophils counts in the infected cattle in comparison to control cattle. Biochemical studies revealed that the values of glucose, alkaline phasphatase, AST and ALT were significantly (P<0.05) increased in infected cattle than in the control cattle.
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