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Reduction of Carryover of Aflatoxin from Cow Feed to Milk by Addition of Activated Carbons

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Abstract:

According to a double-reversal experimental design on 12 late-lactation Friesian cows the effect of two activated carbons (ACs) (CACl and CAC2) and a hydrated sodium calcium alumino-silicate (HSCAS) on carryover of aflatoxin B1 (AFB1) from feed to aflatoxin M1 (AFM1) in milk was determined. Cows were fed a basal diet containing AFB1 naturally contaminated com meal and copra, During week 1 cows were fed diets containing AFB1 alone (11.28 μg of AFB1/kg of feed); in week 2 the diets contained AFB1 plus 2.0% sorbent; and in week 3 the diets again contained AFB1 alone (13.43 μg of AFB1/kg of feed). ACs reduced the analytical content of AFB1 in the pelleted feed by from 40.6% to 73.6%, whereas reduction by HSCAS was 59.2%, The AFM1 concentrations in milk in weeks 1 and 3 were higher than that in week 2, Decreases in the AFM1 excreted in the milk by addition to feed of 2% of the sorbents ranged from 22% to 45%. CACl and HSCAS were significantly different from each other in reducing the AFM1 concentration in milk (45.3% versus 32.5%); these reductions were significantly higher than that of CAC2 (22.0%). Carryover reduction by addition of CACl (50%) was significantly higher than that of HSCAS (36%). Addition of 2% CAC2 did not allow pelleting of feed because of the caking action of this carbon, The lower performance of CAC2 could be related to the unsuccessful pelleting. The addition of ACs did not influence feed intake, milk production, milk composition, or body weight. Our results suggest that ACs, high-affinity sorbents for AFB1 in vitro, are efficacious in reducing AFB1 carryover from cow feed to milk. Further in vivo investigations should establish lower amounts of ACs which can be efficacious.

Keywords: ACTIVATED CARBONS; AFLATOXINS; CARRYOVER; FEED; MILK

Document Type: Research Article

Affiliations: 1: Istituto di Zootecnica, Facoltà di Agraria, Universita di Reggio Calabria, Piazza S. Francesco 7, 89061 Reggio Calabria, Bologna, Italy 2: Istituto di Scienze degli Alimenti e della Nutrizione, Facoltà di Agraria, Università Cattolica del Sacra Cuore, Via Emilia Parmense 84, 29100 Piacenza, Bologna, Italy 3: CERZOO, Centra Ricerche Zootecniche, S. Bonico, Piacenza, Bologna, Italy 4: Dipartimento di Scienze Chimiche, Universitá di Catania, Viale A. Doria 6, 95125 Catania, Bologna, Italy 5: Facoltà di Medicina Veterinaria, Università de Bologna, Via Tolara di Spora 50, 40064 Ozzano Emilia, Bologna, Italy

Publication date: 1996-05-01

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