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The aim of the present study is to evaluate the level of contamination of breast milk (BM) by ochratoxin A, among Moroccan lactating mothers in the city of Rabat, and to identify the associated factors of exposure, also to estimate the degree of exposure of the breastfeed infant. The analysis of ochratoxin A (OTA) was accomplished by ELISA method on 82 colostrum samples. OTA was detectable (>0.08 ng/mL) in 55% of samples with a maximum concentration of 10.04 ng/mL, and the levels exceeded 0.5 ng /mL in 50 % of the samples. In addition, several factors and dietary habits affect significantly the level of OTA in the analyzed samples of breast milk including, the consumption of industrial dairy products, the frequency of consumption of canned foods, dried fruits and legumes, also the period of breast milk collection. Besides, OTA was higher than the tolerable daily intake for 49% newborns. However, these results need to be confirmed by multicenter studies to more broadly estimate the levels of exposition of Moroccan population to OTA. Furthermore, awareness campaigns are recommended to inform the public, especially pregnant women and lactating women about appropriate preventive measures to limit exposure to this mycotoxin.