TABLE 4.

Adherence of M. catarrhalis wild-type strain O35E and mutant O35EkdtA to human epithelia

StrainAdherencea (%)
Chang cellsHeLa cellsA549 cells
O35E44.0 ± 6.642.6 ± 7.625.9 ± 11.2
O35EkdtA20.6 ± 6.4*19.0 ± 6.3*25.1 ± 2.6
  • a Adherence of M. catarrhalis organisms to human epithelia is expressed as mean (± standard deviation) percentage of bacteria attached to the human cells, based on the number of original bacteria that were added to the well. *, compared with O35E (P < 0.01, using chi-square test).