Table 2.

Magnitude of PB sequestration on M. catarrhalis OMVs.

Treatment	PB2 (µg/mL)	PB1 (µg/mL)	PB2 + PB1 (µg/mL)
Standard PB	14.38 ± 0.48	17.45 ± 3.58	31.83 ± 3.47
PB after treatment with 5 µg/mL OMVs	7.76 ± 1.01	5.19 ± 1.05	13.67 ± 1.33 *
PB after treatment with 20 µg/mL OMVs	0.96 ± 0.42	0.06 ± 0.01	1.02 ± 0.42 *

The PB content was measured by HPLC-UV method as described in material and methods. The results are expressed as mean ± SD. * p < 0.001 in reference to standard PB as determined by one-way ANOVA.