translate English to French: In this bioassay, male Osborne-Mendel rats were exposed to 0, 200, 400, 900 or 1800 mg chloroform/L drinking water (number of animals: 330, 330, 150, 50 and 50, respectively) for a period of 2 years.
Des rats mâles Osborne-Mendel ont été exposés à 0, 200, 400, 900 ou 1 800 mg de chloroforme/L d'eau potable (n : 330, 330, 150, 50 et 50, respectivement) pendant deux ans.