Table 2 shows the patterns presented by nonmotile
strains. We found that 50 (86%) out of 58 nonmotile
strains presented RFLP patterns identical to some of
those observed for the motile strains. The eight nonmotile
strains with nonmatching patterns were in
serogroups O26 (3 strains), O111 (4 strains) and
O114 (1 strain). Interestingly, a nonmotile O111 strain
showed the H6 pattern, which corresponds to the
serotype O111:H6 that has not been isolated in Brazil
yet (Ewing et al., 1963). The isolates with nonmatching
patterns probably correspond to serotypes that are
rare or nonexistent in Brazil.