ANTIMICROBIAL ACTIVITY OF PSEUDOMONAS SPP AGAINST FOOD POISONING BACTERIA AND MOLDS

The present study demonstrates the siderophore production of two strai ns of Pseudomonas fluorescens and two of Ps. chlororaphis. The antimic robial activities of these strains were studied against Salmonella typ himurium, Staphylococcus aureus, Fusarium culmorum, F. oxysporum and A spergillus niger. Despite equal siderophore activities with various Ps eudomonas spp. as measured by the chrome azurol S assay, the study sho ws how siderophore activity does not correlate with the antibacterial activity against food pathogens or with the antimould activity against pathogenic moulds. Furthermore, the results illustrate how siderophor es are able to act both as growth inhibitors and stimulators.