Screening of an Antagonistic Bacterial Strain Against Salmonella and Its Application in In-site Bioremediation of Salmonella-contaminated Soils

Abstract:

A bacterial strain, A45, with antagonistic activity against Salmonella was isolated from Salmonella-contaminated soils, which was identified as Alcaligenes sp. by checking the individual morphology, colony characteristics and 16S rDNA sequencing. The inhibiting effects of A45 to Salmonella in soils were investigated by field and greenhouse pot experiments respectively. The amounts of Salmonella in soils decreased up to three orders of magnitude after spraying A45 into soils both under greenhouse and field conditions. It suggested that it might be an effective, economical and environmentally friendly approach to apply A45 for in-site remediation of pathogens-contaminated soils.

Key words:Salmonella, Antagonistic bacterium, Soil pollution, Bioremediation, Alcaligenes sp.