Between january 1983 and march 1984, stool specimens from 380 children under 2 years old with complicated acute diarrhea and 20 normal children were studied. Stool specimens were obtained with rectal swabs and transported in Cary and Blair medium. Flooded slides one to 2 minutes with a mixture of equal parts Hucker's crystal violet solution and 1 percent sodium bicarbonate (VB), were prepared from each specimen and looked for seagul rods. Culture of the stool specimens were made for Campylobacter sp. isolation. In the present work the flooded slides were thought as a presumptive diagnosis and we obtained a positive sensitivity of 80 percent and a positive predictibility of 5,7 percent