Raw milk samples showed evidence of Aflatoxin M1 contamination, median 0.09 with a minimum of 0.00
μg/l and a maximum of 2.93 μg/l. The higher prevalence rate (100%) along with moderately higher contamination
level of AFM1 in the raw milk samples indicate that lactating cows in Bomet are exposed to AFB1-contaminated
feeds in different study sites. However, it was not possible to determine the level of AFB1 in the feed of
dairy cattle in the present study. Bomet County is usually characterized by high temperature and humidity between
the months of January and March which was the period for our sample collection. These conditions are