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. 2011 Jul;55(7):3084–3090. doi: 10.1128/AAC.00929-10

Fig. 1.

Fig. 1.

Electron microscopy micrograph of OMVs released by A. baumannii clinical strain AbH12O-A2. Vesicles were purified from broth cultures by ultracentrifugation and filtered through a 0.22-μm filter. The average diameter of the vesicles was 40 nm. The OMVs were free of contaminating bacteria.