Détermination des concentrations de déoxynivalénol et zéaralénone associées à des maladies chez les vaches laitières
In Quebec, the most common mycotoxins found in the diet of the dairy herd are deoxynivalenol (DON) and zearalenone (ZON). As part of our study, we had two main objectives. The first objective was to quantify DON and ZON mycotoxins in naturally contaminated dairy cows by assessing their presence in the feed, serum and urine of these cows. The second objective was to determine the extent to which these mycotoxin concentrations could be associated with health, production and reproductive problems in these cattle. The study was conducted in two phases. In the first phase, we carried out 60 dairy herds to identify their levels of mycotoxin contamination. In the second phase, we selected 15 herds with the lowest serum De-epoxy-deoxynivalenol (DOM-1) concentrations and 15 herds with the highest DOM-1 concentrations This project allowed us to identify concentrations of DON and ZON at the dietary and urinary levels that were associated with increased risks of reform, abortion, decreased reproductive performance, hypercetonemia, clinical endometritis And lower milk production. The data collected will allow veterinarians and nutritionists to refine their recommendations to dairy producers regarding the management of mycotoxins.
Urine Deoxynivalenol Zearalenone Cow Food Serum