A total of two hundred and fifty random samples of infant's milk powder for babies after birth (70 samples), milk-based cereal weaning food (90 samples) and dried milk powder (90 samples) were purchased from different shops and pharmacies in Assiut city and villages around the city. The samples were still valid for consumption as shelf life is at least to be more than one year from production time and they were transferred to the laboratory in their packages to be examined for prevalence of Enterobacter sakazakii which could be isolated from 6/90 milk-based cereal baby food samples and from 1/90 dried milk powder samples, however, failed to be detected in infant milk formulae which considered as non sterile products. The survival and growth of E. sakazakiiin milk-based cereal weaning food using different reconstituted liquids (apple juice and water) stored at different temperatures (room temperature      16 ± 2°C and refrigerated temperature 4±1°C) were carried out. The results revealed that the growth did not occur in cereal reconstituted with apple juice, regardless of storage temperature, or in cereal reconstituted with water stored at 4±1°C. Upon reaching maximum populations of 4 log10 cfu/ g, in some instances populations decreased to nondetectable values during subsequent storage which was concurrent with decrease in pH values. E. sakazakii initially at very low populations can rapidly grow in infant cereal reconstituted with water. The public health hazards of E.sakazakii and the suggestive measures for improving the quality of infants' food were discussed.