Mycotoxin Survey in US By-Products: July 2022 Update

Each sample was tested for 6 major mycotoxin groups of:

• A-Trichothecenes (A-Trich): T-2, HT-2, Neosolaniol, Diacetoxyscirpenol

• B-Trichothecenes (B-Trich): Deoxynivalenol (DON/Vomitoxin), Acetyl-deoxynivalenol, Nivalenol, Fusarenon X

• Fumonisins (FUM): B1, B2, B3

• Zearalenone (ZEN)

• Aflatoxins (Afla): B1, B2, G1, and G2

• Ochratoxin A (OTA)

The survey results represent samples sent in for surveillance testing only and does not include any sample submitted following clinical signs. Below we discuss trends of each of these feed ingredients regarding mycotoxin occurrence and contamination levels.

• Of the 48 corn DDGS samples tested, surveillance suggests that mycotoxin occurrence is somewhat increased compared to 2020, with the greatest shifts in Zearalenone (+6% points).

• Of the 22 corn gluten products samples tested, surveillance indicates that the presence of B-Trichothecenes and Fumonisins remains high. Zearalenone is also frequently detected, but occurrence has decreased from 2020 (-9% points).

• Of the 28 wheat midds samples tested, surveillance suggests that mycotoxin contamination is somewhat lower compared to 2020. In addition to screening for the traditional mycotoxins listed above, it is recommended to also screen wheat midds for the presence of ergot alkaloids.