Oral toxicity evaluation of M31 isolated from the children's feces in the northern province of Vietnam.

This study investigated the acute and repeated 28-day dose toxicity profiles of M31, isolated from children's feces, in Swiss rats and New Zealand rabbits. To investigate acute toxicity, rats were given varied doses of M31 (1 × 10 CFU/mL, 3 × 10 CFU/mL, and 5 × 10 CFU/mL) orally once daily for 14 days, in accordance with OECD recommendations No. 423.