FIELD : medicine.SUBSTANCE : invention relates to medicine, pediatrics, infectious diseases. Method for the diagnosis of acute intestinal infections of bacterial etiology in young children includes conducting a general analysis of peripheral blood, determining the value of the index of nuclear leukocyte intoxication, calculating the probability of bacterial etiology of AII using the formula : P=(e-6.8+0.18X)/(1+e-6.8+0.18X)×100?%, where P is the probability in % of bacterial etiology of AII; e is the base of the natural logarithm, equal to 2.7, X is the specified value of a particular patient, with a P value of more than 50?%, the bacterial etiology of AII is diagnosed, less than 50?% – absence of bacterial etiology of AII.EFFECT : method for diagnosing acute intestinal infections of bacterial etiology in young children is proposed.1 cl, 1 tbl, 3 ex