Antibacterial activity of two newly isolated Bdellovibrio bacteriovorus strains on Salmonella enterica serovars of food safety concern

Abstract

Bdellovibrio is the most studied obligate predatory bacteria. It has potential for use as biological control of gram-negative bacteria in health, agriculture, and the food industry. Most basic research and applications use the type strain Bdellovibrio bacteriovorus HD100 or a closely related strain 109J. Screening for other Bdellovibrio strains and their killing activity should be explored, knowing that prey range and efficiency could differ among Bdellovibrio strains. This study presents two newly isolated B. bacteriovorus strains, YOA24 and YOA38, with lytic activity on Salmonella enterica serovars. B. bacteriovorus YOA24 and YOA38 represent a biological control agent for foodborne S. enterica serovars due to their killing activity on the important Salmonella strains tested.