The levels of fumonisin B (FB) residues in plasma, urine, feces and hair from 24 piglets fed FB-contaminated diets containing 3.1, 6.1 or 9.0 μg FB.g for 28 days were determined using liquid chromatography coupled to mass spectrometry (LC-MS/MS). The levels of FB in plasma, urine, feces and pooled hair (n = 3) samples varied from 0.15 to 1.08 μg.L, 16.09-75.01 μg.L, 1.87-13.89 μg.g and 2.08-8.09 ng.g, respectively. Significant correlations (r = 0.808-0.885; P < 0.001; N = 18) were found between FB intake and plasma FB on days 7, 14, 21 and 28. However, urinary FB correlated with FB intake only on days 7 and 14 (r = 0.561-572; P = 0.02; N = 18). A significant correlation (r = 0.509; P = 0.02; N = 24) was also found for the first time between FB in hair samples and FB intake. Plasma and urinary FB are good biomarkers of early exposure of pigs to low dietary FB levels, although plasma is recommended to assess prolonged exposure (>14 days). The possibility to evaluate hair as a biomarker of fumonisin exposure was established, although further studies are needed to provide physiologically based toxicokinetics of residual FB in the pig hair.
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