Figure 3. Scanning electron micrographs of internal plastic surface of contaminated irrigation fluid bottle implicated in a 2012–2013 cutaneous melioidosis cluster in the temperate southern region of Western Australia. A–C) Bacilli tethered to each other and to the surface by short peritrichous or polar adhesions (A, C) and occasionally by fibrillary material (B), which appeared to have a globular structure at higher magnification. Decayed cells were common (arrows). D) Clusters of cells were regularly dispersed over the surface. Scale bars indicate 2 μm (A); 200 nm (B and C); 500 nm (B, inset); and 10 μm (D).