New serotypes of Morganella morganii.

On the basis of 8 new O and 11 new H antigens determined in 22 strains, the Morganella morganii antigenic schema was supplemented with 8 serogroups (O35-O42) and 13 serotypes. Four strains belonged to O groups described earlier and 2 strains contained new O antigens in combination with known O antigens. Known H antigens were present in one strain as a single factor and in one strain as combination of two factors.