Aeromonas hydrophila (Ah) is an opportunistic Gram-negative bacterium and a serious global pathogen causing Motile Aeromonas Septicaemia (MAS) in fish and many other vertebrates. This study aimed at identifying the cellular proteins and processes altered by Ah infection in liver tissue of Labeo rohita, an important aquaculture species. Discovery based proteomics data could identify a panel of differentially expressed proteins (DEPs) between Control and AH condition (Ah infected group). Protein abundance changes in a few selected DEPs was then validated using Selected reaction monitoring (SRM) approach.