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Influence of sodium bentonite and activated charcoal on aflatoxin M1 excretion in milk of goats

2001; Elsevier BV; Volume: 41; Issue: 3 Linguagem: Inglês

10.1016/s0921-4488(01)00216-4

1879-0941

Suguna Rao, R.C. Chopra,

Meat and Animal Product Quality

An experiment was conducted to find out the carry-over of aflatoxin B1 (AFB1) in to milk as AFM1. Nine crossbred (Alpine×Beetal and Saanen×Beetal) lactating goats in early lactation were randomly divided into three groups of three each in a Latin square layout. Pure AFB1 was administered to all groups at the rate of 100 ppb in the diet. Group I served as control (T1). In group II (T2) sodium bentonite (NaB), and in group III (T3), activated charcoal (AC), were added at the rate of 1% of DMI. There was no effect (P>0.05) of aflatoxin and/or adsorbent on DMI (kg per day) and daily milk yield (kg per day) during the experimental period of 14 days. The AFM1 concentration (μg/l), excretion (μg per day) and carry-over (%) of AFB1 in T1 continued to increase with the passage of time, whereas, the same was seen to decline in the adsorbent fed groups T2 and T3. The percentage reduction of AFM1 excretion was higher (P<0.05) in the bentonite (T2) (66.57±4.85) and AC (T3) (75.99±7.13) groups in comparison to T1 on the 14th day of the experiment. The percentage reduction of carry-over was higher (P<0.01) in the bentonite (T2) (65.26±3.24) and AC (T3) (76.09±6.36) groups in comparison to T1. There was no effect of adsorbents on milk composition except Zn which was greater (P<0.05) in T3 in comparison to T1 and T2. Thus, it can be concluded that supplementation of NaB or AC at 1% of DMI for early lactating goats resulted in significant reduction in AFM1 content of milk and carry over of aflatoxin from feed to milk without causing any change in composition of milk. Milk containing AFM1 may adversely affect the health of humans when consumed. This study suggests approaches to reducing AFM1 excretion in the milk of goats receiving feeds contaminated with low levels of AFB1.