Each toxin is produced by a different mold. The conditions that promote growth of molds vary, although high moisture and warm temperatures are the primary requirements for mold growth on feedstuffs. Aflatoxin Aflatoxin is produced by Aspergillus flavus, which can germinate at lower moisture levels of 15 to 17 percent, but infection and growth require higher moisture. The effect on pig performance, of feeding aflatoxin-contaminated grain, depends on the age and health of the pigs as well as, the concentration of the toxin in the feed. Young swine are most sensitive to its effects.
Small amounts can reduce pig performance and overall health.
Prolonged exposure may cause cancer, liver damage, jaundice and internal bleeding. Over time, profits are reduced due to loss in efficiency, slower growth and increased medical costs. Aflatoxin M1, a metabolite of aflatoxin, has been found in the milk of sows fed diets containing aflatoxin. Pigs nursing sows consuming feed with 500 to 750 ppb of aflatoxin had increased mortality and slower growth. Pigs were permanently stunted and performance was reduced to market weight even though they were not exposed to aflatoxin after weaning.