Levels of aflatoxin B1, bacteria and fungi in feed and food in 1971 - 1987.

Totally 39% out of 8371 feed and their component samples were contaminated by aflatoxin B1. Mean contamination was 36μg/kg with maximum yield 10100 μg/kg. Contamination of samples by total count of organisms, mean contamination and maximum yield, respectively was: 1) bacteria 99%, 2.2×10(6), 2.4×10(8); 2) proteolytic bacteria 94%, 1.2×10(5), 3.0×10(6);3) moulds 98%, 1.3×10(5), 9.0×10(6); 4) yeasts 44 %, 3.3×10(4), 3.6×10(6). The samples were contaminated in 92 % byAspergillus spp, in 71% byAspergillus flavus, in 83% byPenicillium spp, and in 20% byFusarium spp with mean contamination 8.3×104, 1.1×10(3), 4.2×10(4), 5.0×10(3) , and maximum yield 6.8×10(6), 1.0×10(5), 5.0×10(6), 1.5×10(6), respectively. Totally 8.5% of strains were aflatoxinogenic and 4.4% of the strains were isolated from feed and 21 % of the strains from grain/nut.