Harendra Chauhan

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The effect of purified aflatoxin B1 on cell-mediated immunity (CMI) in broiler chicks was assessed using doses of 0.3 and 1 mg/kg feed from hatching to 6 weeks of age. Total lymphocyte and T lymphocyte counts and the 2,4-dinitrofluorobenzene skin sensitivity test, graft-versus-host reaction and nitroblue tetrazolium salt reduction tests were used to(More)
Cypermethrin toxicity was produced in mice by intra-peritoneal injection of the pesticide at 50 mg/kg body weight per day for 26 days, and in goats by drenching with cypermethrin at 41.6 mg/kg body weight per day for 30 days. The status of cell-mediated immunity (CMI) was assessed by the 2,4-dinitrofluorobenzene (DNFB) skin sensitivity test. The results(More)
The effects of purified aflatoxin B1 on cell mediated immunity in broilers were carried out using 0.3 p.p.m. and 1 p.p.m. dose level. The percentage of acid alpha-naphthyl acetate esterase reacting lymphocytes was significantly (P less than 0.05) decreased in chicks fed 0.3 p.p.m. and 1 p.p.m. level of aflatoxin B1. The albumin and globulin values were also(More)
The role of macrophages in immunity against Marek's disease (MD) was studied. Chickens of one group were subjected to depletion of macrophages using repeated doses of Francil amorphous silica and those of another group were subjected to activation of macrophages using repeated doses of brewer's thioglycollate broth. Chickens of a third group were vaccinated(More)
Crystalline ochratoxin A (OA) was added to the feed of broiler chicks at 0.5 ppm and 2.0 ppm, and humoral and cell-mediated immunity (CMI) were studied. CMI was assessed by skin sensitivity testing, graft versus host (GVH) reaction and T lymphocyte count. Humoral immunity was examined by measuring the haemagglutinin (HA) response to sheep RBC (SRBC). In(More)
Degnala disease, which is believed to be a mycotoxicosis, has clinical syndrome similar to chronic ergotism and is characterised by development of oedema, necrosis and gangrene of the legs, tail, ears, etc. The gross and histopathologic studies revealed thickening of the wall of blood vessels, associated with thrombus formation, and eosinophilic(More)