Figure 4
From: Bacterial determinants of importance in the virulence of Gallibacterium anatis in poultry
Outer membrane vesicles (OMVs) are naturally secreted from G. anatis . OMVs are seen as spherical structures in sizes ranging from 20 nm and up to 160 nm. The OMVs were isolated from G. anatis strain 12656–12 and viewed by transmission electron microscopy with 2% (w/v) phosphotungstic acid staining [69].