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Regarding flagellar expression in clinical isolates of non-typeable Haemophilus influenzae.

Haemophilus influenzae (HI) has historically been considered to be a non-motile, non-flagellate bacterium. It was, therefore, of considerable interest that Carabarin-Lima et al. [1] described ‘swarming motility’ in numerous HI strains, and the presence of two flagella genes in strain BUAP96. One of the strains reported as motile was Rd KW20 (Rd), the first bacterium to have its whole genome sequenced [2], which does not possess any known flagella genes.