A total of 212 stools specimens from diarrhoeal children were analyzed for the detection of pathogenic agents (parasites, bacteria and rotavirus). There were only 80 negatives specimens. In the 132 positive ones, a total of 192 pathogenic agents (81 parasites, 76 bacteria and 35 rotavirus) were found. There results are very similar to those obtained in the hospitalized children. The etiology of this African intestinal polymicrobism must be searched by comparison to the European monomicrobism . In the low conditions of hygiene and nutrition, the concept of "Herd infection" is discussed. In conclusion, specific pathogen agents must be considered as "opportunist pathogen agents of the unfortunate human collectivities ".