Outer membrane vesicles from A. baumannii DS002 were isolated using Diafilteration and Ultracentrifugation. The proteins of OMVs were separated on a 12.5% SDS-PAGE gel. The protein bands were excised and in-gel digetion was carried out using trypsin. The resultant peptides were analysed on LC-ESI-MS/MS. The proteins were identified with the help of Proteome Discoverer software.