Which mycotoxin is known for causing reproductive problems in livestock?

Zearalenones are a group of mycotoxins that are specifically known for their estrogenic properties, which can lead to reproductive issues in livestock. They are primarily produced by certain species of Fusarium fungi that can contaminate crops, particularly grains like corn and barley. The presence of zearalenones in feed can disrupt normal reproductive functions, leading to conditions such as infertility, abnormal estrous cycles, and complications during pregnancy in livestock.

In contrast, the other mycotoxins mentioned do have their own health impacts but do not specifically target reproductive health in the same manner as zearalenones. For instance, DON, or deoxynivalenol, primarily affects feed intake and can cause vomiting and immunosuppression in animals. Ergot is linked to different health issues, primarily caused by the consumption of grains contaminated with Claviceps species, leading to vasoconstriction and gangrene. Aflatoxin is notorious for its acute toxicity and carcinogenic effects, particularly in poultry and mammals, but it does not specifically cause reproductive problems.

Thus, zearalenones stand out for their direct impact on the reproductive capacities of livestock, making them the correct choice in this context.