Antibacterial activity of a mixed-type siderophore belonging to the pyoverdine family produced from Pseudomonas sp

Significant knowledge gaps remain regarding the properties of siderophores and their diverse applications. This study aims to characterize siderophore production by the marine bacterium Pseudomonas sp. strain ASA235 and evaluate its effectiveness as an antibacterial agent targeting both Gram-negative and Gram-positive bacteria. Tetrazolium and Arnow's tests revealed that the bacterium produces a mixed-type siderophore belonging to the pyoverdine family. The antimicrobial susceptibility test revealed its activity against Bacillus subtilis, Staphylococcus aureus, and Klebsiella pneumoniae.