cfa/i and cfa/ii were never found on the same serotypes of etec , but 98 % of the heat-stable and heat-labile enterotoxin-producing etec belonging to the frequently isolated serogroups o6 , o8 , o15 , o25 , o63 , and o78 were positive for either cfa/i or cfa/ii .
C0003320
cfa/i
C0003316
cfa/i