Role of siderophores in the biocontrol of <i>Pseudomonas tolaasii</i> by fluorescent pseudomonad antagonists

Henry, Michelle B.; Lynch, J. M.; Fermor, T. R.

doi:10.1111/j.1365-2672.1991.tb04434.x

Cited by 21 publications

(13 citation statements)

References 16 publications

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“…is siderophore-mediated competition for iron In our experience (Guillot andLeclerc 1993), 40% were (Freedman et al 1989 ;Henry et al 1991). An inhibitory effect Pseudomonas species with about 90% of strains producing a against pathogenic and spoilage bacteria by Pseudomonas spp.…”

Section: Introductionmentioning

confidence: 77%

Antimicrobial activity among Pseudomonas and related strains of mineral water origin

Vachée¹,

Mossel

Leclerc³

1997

Journal of Applied Microbiology

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A. VACHÉ E , D . A. A. M OS SE L AN D H . LE CL E RC . 1997. Siderophore production in 382Pseudomonas and related strains of mineral water origin were screened and the antimicrobial activities of 158 of these tested against nine target organisms of health significance. Presence of siderophores could be detected in 54·4% and the majority of strains tested (91·2%) inhibited at least one of the nine target strains. Staphylococcus, Escherichia coli and Aeromonas hydrophila were particularly sensitive. Addition of iron eliminated the inhibitory activity in 96·7% of cases ; the antagonistic effect should be largely determined by siderophore-mediated competition for iron. Most of the inhibitory strains produced siderophores, whereas the non-inhibitory strains did not. Few strains also produced bacteriocins showing activity against Pseudomonas aeruginosa and Aer. hydrophila. Strains isolated from mineral water have a broad antibacterial potential.

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Section: Introductionmentioning

confidence: 77%

Antimicrobial activity among Pseudomonas and related strains of mineral water origin

Vachée¹,

Mossel

Leclerc³

1997

Journal of Applied Microbiology

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“…(1996) showed that a Pseudomonas strain from the sediments of wells, which inhibited several enteropathogenic bacteria on agar, could also cause inhibition in an aquatic environment. Similarly, antagonism by a number of Pseudomonas bacteria against Pseudomonas tolaasii , shown in vitro on agar, could be reproduced under commercial mushroom growing conditions (Henry et al . 1991).…”

Section: Discussionmentioning

confidence: 99%

Survival of Escherichia coli O157:H7 in farm water: its role as a vector in the transmission of the organism within herds

McGee

Bolton

Sheridan

et al. 2002

Journal of Applied Microbiology

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Aims:The study aimed to investigate the survival characteristics of Escherichia coli O157:H7 in farm water (FW), and in sterile distilled municipal water (SDW), stored outdoors under field conditions, with or without the addition of faeces (1% w ⁄ v), in a farmyard shed and the laboratory at 15°C. Methods and Results: Water samples were inoculated with E. coli O157:H7 at 10 3 and 10 6 ml )1 , and sampled over a 31-day period. In FW stored outdoors in a field, E. coli O157:H7 survived for 14 days at temperatures <15°C, at both inoculation levels, while in the laboratory at 15°C, the organism was still detectable at low levels (<1 log 10 cfu ml )1 ) after 31 days. The addition of bovine faeces to water outdoors (1% w ⁄ v) resulted in survival for 24 days. In SDW inoculated at 10 6 ml )1 and stored in the laboratory (15°C), only a 2AE5 log reduction was observed after 31 days, while the organism could not be detected after 17 days in the field. Preliminary screening of water samples stored outdoors isolated a bacterium which exhibited antimicrobial activity towards E. coli O157:H7. Conclusions: The survival of E. coli O157:H7 observed in this study illustrates the potential of farm water to act as a vehicle in the transfer of the organism across a herd. Significance and Impact of the Study: The difficulty in extrapolating results from controlled laboratory situations to on-farm conditions is also highlighted in this study.

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“…Similarly, Pybus el al. (1994) found that addition of iron eliminated the inhibitory activity of Vibrio anguillarum against Vibrio ordalii, and several studies (Kloepper et al 1980;Freedman et al 1989;Henry et al 1991) have shown that addition of iron to media decreases the inhibitory effect of pseudomonads in agar plate assays. Part of the inhibitory activity of Pseudomonas observed in the present study is attributed to their siderophore formation or to antibacterial compounds under iron regulation.…”

Section: Discussionmentioning

confidence: 99%

Interaction between fish spoilage bacteria Pseudomonas sp. and Shewanella putrefaciens in fish extracts and on fish tissue

Gram¹,

Melchiorsen²

1996

Journal of Applied Bacteriology

142

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The interaction between fish spoilage bacteria, Pseudomonas sp. and Shewanella putrefaciens, was investigated using fish extract and fish tissue as model systems. Isolates of Pseudomonas that produced iron chelators, siderophores, inhibited growth of S. putrefaciens in a fish-extract-agar diffusion assay but no, or only weak, antagonistic activity was seen when the medium was supplemented with iron. Sterile-filtered supernatant fluid from a siderophore-producing Pseudomonas grown in fish extract was inhibitory to S. putrefaciens if the number of Psudomonas was above 10(8) cfu ml-1. In contrast, supernatant fluids from siderophore-negative Pseudomonas isolates did not inhibit growth of S. putrefaciens. The inhibitory effect was, except for one strain of Pseudomonas, not seen in supernatant fluids from iron-enriched cultures of Pseudomonas sp. Finally, siderophore-producing Pseudomonas sp. lowered the maximum cell level of S. putrefaciens 1-2 log units from 10(9) to 10(10) cfu g-1 when the strains were grown on fish muscle blocks at 0 degrees C but the growth rate of S. putrefaciens was not affected.

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Role of siderophores in the biocontrol of Pseudomonas tolaasii by fluorescent pseudomonad antagonists

Cited by 21 publications

References 16 publications

Antimicrobial activity among Pseudomonas and related strains of mineral water origin

Antimicrobial activity among Pseudomonas and related strains of mineral water origin

Survival of Escherichia coli O157:H7 in farm water: its role as a vector in the transmission of the organism within herds

Interaction between fish spoilage bacteria Pseudomonas sp. and Shewanella putrefaciens in fish extracts and on fish tissue

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