Beschreibung:
<jats:p>
From stool samples of isolated subjects from members of the Yanomama tribe of South America, 432 isolates of
<jats:italic>Escherichia coli</jats:italic>
were obtained from 72 individuals. Two hundred and four of these strains were typable with a standard panel of 147 O antisera; included in the above were eight enteropathogenic strains. From the untypable strains, antisera were produced, and 13 serologically distinct O serotypes were identified. These data substantiate the ubiquity of known strains of
<jats:italic>E. coli</jats:italic>
as microhabitants of man's internal environment. The finding of 13 new O serotypes suggests that, in efforts to understand the ecosystem of primitive man, the internal milieu must also be investigated.
</jats:p>