[Modified test with oral lactose loading for detecting lactose intolerance in young children].

Twenty-four children with persistent diarrhea or intestinal dysfunction were examined; lactose, glucose with galactose and lactic acid levels in their feces were not a convincing evidence of lactose intolerance. Detection in the feces of elevated levels of 2 or more parameters after oral lactose load (2 g/kg, not more than 15 g), as well as an increment of a previously elevated value or its manifestation evidenced lactose intolerance. No increase of carbohydrate levels or lactic acid in the feces were observed in the group of 21 age-matched controls.