Pathogenic Escherichia coli is often isolated from diarrheic stools of newborn and young infants in Djakarta. Infection with these bacteria occurs in Djakarta not only in hospitals but also frequently at home. The most important serotypes causing these home infections are O111:B4:H2, O126:B16:H2 and O142:K86(B):H6. Other serotypes found were non-motile O127:B8, O127:B8:H6, non-motile O55:B5, O125:B15:H21ac, O119:B14:H6, non-motile O86:B7, non-motile O128:B12, O128:B12:H12 and strains of O114. They are found most frequently in newborn and young infants but may also be found in children suffering from diarrhea and malnutrition. Only one strain of O114 was found in 50 healthy babies.
Shigella infection is also a frequent cause of diarrhea among infants and children in Djakarta. It is rare in newborn and young infants and is found most frequently in the age group of 1 to 2 years. The serotypes isolated in this study were types of S. flexneri and S. sonnei.