“…Similarly, Verma et al, (2004) reported a significant decrease in the relative weight of the bursa of Fabricius when birds were exposed to diets having 2000 ppb AF. Similar reduction in BBR and moderate histopathological changes have been reported in broilers (Giambrone et al, 1985;Marquez and Hernandez, 1995), laying hens (Dafalla et al, 1987), ducks (Sell et al, 1998;Khajarern and Khajarern, 1999) and wild turkeys (Quist et al, 2000) when birds were fed diets having various levels of AF (100 to 500 ppb). In addition, vacuolation of liver cells and cellular depletion in the follicle medulla of the bursa Fabricii has been reported to be produced as an indication of aflatoxicosis by feeding lower levels of AF (100 ppb) over a long-term period of 42 days (Espada et al, 1992).…”