The Thai Journal of Veterinary Medicine


The objective of this study was to determine the impact of abnormal physical characteristics for monitoring aflatoxin B1 (AFB1) contamination in commercial dairy concentrate feeds. The study was conducted during March to May 2013 using 82 dairy farms in Chiang Mai province, Thailand. All feed samples were collected from new packages and their physical characteristics were subsequently determined. AFB1 concentrations in the samples were measured using the enzyme-linked immunosorbent assay (ELISA), and feed samples with AFB1 of more than 5 µg/Kg were determined as AFB1 contaminated samples. The impact of physical characteristics on AFB1 contamination were evaluated using a multiple logistic model with a p-value less than 0.05. Forty percent (39 of 97) of the feed samples were contaminated with AFB1. Concentrate feeds with rancid or sour odors had a higher risk of AFB1 contamination (OR =4.79, P=0.03), as did samples with a high appearance of a brightly illuminated fluorescence on feed after testing with black light (OR= 24.04, P = 0.0002). Farmers can use these indicators as screening tests before purchasing the feed.

First Page


Last Page