Strain   Sera Dilution   OMV w/o MS OMV + SBa15 OMV+SBa16 P2498 *(a) 1:50 1:100 B2443 1:100 1:100 1:400 C2135 ND ND ND B4 *(b) *(b) *(b) P2354 1:100 1:100 1:400 Y USA 1:50 1:50 1:100 *(a) is not showed a bactericidal effect *(b) the strain B4 was sensible to rabbit complement and not showed grown in the test

Table 2: Bacteria strains and Serum Bactericidal activity of mice sera immunized with OMV from B2443.