Society of African Journal Editors

Uganda Journal of Agricultural Sciences

Effect of supplementing lactating goats fed on aflatoxin contaminated feed with calcium bentonite and activated charcoal on aflatoxin M1 concentration, excretion and carryover in milk

Authors: S Mugerwa, J Kabirizi, E Zziwa

Journal: Uganda Journal of Agricultural Sciences

Aflatoxin is a collective term for a group of toxic and carcinogenic secondary metabolites produced by some strains of Aspergillus flavus and Aspergillus parasiticus during growth, on feeds and foods. The fungal spores are found worldwide, in air and soil, and infest both living and dead plants and animals. An experiment was conducted to investigate the concentration, total excretion and carry-over of Aflatoxin B 1 (AFB 1 ) into milk as Aflatoxin M 1 . Nine crossbred lactating goats were divided into three groups of three each, based on the level of milk production. Commercial Aflatoxin B1 (AFB1) was administered to all groups at a rate of 100 ppb in the diet. Group I served as control (T 1 ). In group II (T 2 ), calcium bentonite (CaB) and in group III (T 3 ), activated charcoal (AC), were added at the rate of 1% of Dry Matter Intake (DMI). Dry matter intake was not significantly different (P>0.05) among T 1 (1.22), T 2 (1.14) and T 3 (1.13). Daily milk yield was also not significantly different (P>0.05) among treatments T 1 (0.91), T 2 (0.86) and T 3 (1.03) during the experimental period of 14 days. The AFM1 concentration, excretion and carry-over of AFB 1 in T 1  continued to increase with time, whereas, the same was seen to decline in the adsorbent fed groups T 2 and T 3 . The results suggest that supplementation of CaB or AC at 1% of DMI for lactating goats result in a reduction in AFM 1 content in milk and carryover of aflatoxin from feed to milk without causing any change in composition of milk. Key words : Activated charcoal, aflatoxin, aflatoxin excretion, bentonite, milk contamination