Scanning electron micrographs showing surface structures of
strains 17 (A), OD1-16 (B) and ATCC 25611 (C) and
ATCC 33277 (D), 381 (E) and W83 (F) grown on blood agar plates. P. intermedia strains 17 and OD1-16 had dense meshwork structures surrounding the cell surfaces (A and B), but other strains lacked this phenotype. Bars = 1.2 μm.