Estimating the stability of <i>Escherichia coli</i> O157:H7 survival in manure‐amended soils with different management histories

Semenov, A.; Franz, Eelco; Overbeek, Leo van; Termorshuizen, Aad J.; Bruggen, A.H.C. van

doi:10.1111/j.1462-2920.2007.01558.x

Cited by 79 publications

(59 citation statements)

References 48 publications

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“…Our previous study revealed that the soil microbial community, especially bacteria and fungi, played an important role in the survival of E. coli O157:H7 (9), a finding consistent with those of other studies (15,19,20). The decline in microbial diversity coincided with an enhancement of the survival rate of invading E. coli O157:H7 (17,20). Apart from the diversity of indigenous microflora in the soil, certain groups of microorganisms might also contribute to the persistence of E. coli O157:H7 in soil (19).…”

supporting

confidence: 80%

“…The fate of E. coli O157:H7 in soil can be affected by both biotic and abiotic factors (9,12,15). Our previous study revealed that the soil microbial community, especially bacteria and fungi, played an important role in the survival of E. coli O157:H7 (9), a finding consistent with those of other studies (15,19,20). The decline in microbial diversity coincided with an enhancement of the survival rate of invading E. coli O157:H7 (17,20).…”

supporting

confidence: 79%

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Interaction between the Microbial Community and Invading Escherichia coli O157:H7 in Soils from Vegetable Fields

Yao

Wang

et al. 2014

Appl Environ Microbiol

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The survival of Escherichia coli O157:H7 in soils can contaminate vegetables, fruits, drinking water, etc. However, data on the impact of E. coli O157:H7 on soil microbial communities are limited. In this study, we monitored the changes in the indigenous microbial community by using the phospholipid fatty acid (PLFA) method to investigate the interaction of the soil microbial community with E. coli O157:H7 in soils. Simple correlation analysis showed that the survival of E. coli O157:H7 in the test soils was negatively correlated with the ratio of Gram-negative (G ؊ ) to Gram-positive (G ؉ ) bacterial PLFAs (G ؊ /G ؉ ratio). In particular, levels of 14 PLFAs were negatively correlated with the survival time of E. coli O157:H7. The contents of actinomycetous and fungal PLFAs in the test soils declined significantly (P, <0.05) after 25 days of incubation with E. coli O157:H7. The G ؊ /G ؉ ratio declined slightly, while the ratio of bacterial to fungal PLFAs (B/F ratio) and the ratio of normal saturated PLFAs to monounsaturated PLFAs (S/M ratio) increased, after E. coli O157:H7 inoculation. Principal component analysis results further indicated that invasion by E. coli O157:H7 had some effects on the soil microbial community. Our data revealed that the toxicity of E. coli O157:H7 presents not only in its pathogenicity but also in its effect on soil microecology. Hence, close attention should be paid to the survival of E. coli O157:H7 and its potential for contaminating soils.

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supporting

confidence: 80%

supporting

confidence: 79%

Interaction between the Microbial Community and Invading Escherichia coli O157:H7 in Soils from Vegetable Fields

Yao

Wang

et al. 2014

Appl Environ Microbiol

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“…According to this view, ecosystems with a higher level of biodiversity (Trevors, 1998) are more resistant to perturbances than those with a lower diversity (Tilman, 1997). Consequently, the former habitats would be less susceptible to invasion by E. coli than the latter (Girvan et al, 2005;Semenov et al, 2008). It is an old paradigm that most ecosystems are microbiostatic, that is, they have filled ecological niches and are difficult to invade.…”

Section: Presence and Diversity Of An Indigenous Microfloramentioning

confidence: 99%

“…Given the complexity and heterogeneity of most natural environments, it is intrinsically difficult to predict the fate of E. coli populations facing the combined environmental effects. Recent studies on the effect of microbial diversity and community structure on the persistence of introduced E. coli O157:H7 in soil have nevertheless shown the emergence of relationships between the microbial diversity of the system, abiotic factors and the pathogen's invasibility (van Elsas et al, 2007;Semenov et al, 2008).…”

Section: Conclusion and Prospects For Further Researchmentioning

confidence: 99%

Survival of Escherichia coli in the environment: fundamental and public health aspects

et al. 2010

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In this review, our current understanding of the species Escherichia coli and its persistence in the open environment is examined. E. coli consists of six different subgroups, which are separable by genomic analyses. Strains within each subgroup occupy various ecological niches, and can be broadly characterized by either commensalistic or different pathogenic behaviour. In relevant cases, genomic islands can be pinpointed that underpin the behaviour. Thus, genomic islands of, on the one hand, broad environmental significance, and, on the other hand, virulence, are highlighted in the context of E. coli survival in its niches. A focus is further placed on experimental studies on the survival of the different types of E. coli in soil, manure and water. Overall, the data suggest that E. coli can persist, for varying periods of time, in such terrestrial and aquatic habitats. In particular, the considerable persistence of the pathogenic E. coli O157:H7 is of importance, as its acid tolerance may be expected to confer a fitness asset in the more acidic environments. In this context, the extent to which E. coli interacts with its human/animal host and the organism's survivability in natural environments are compared. In addition, the effect of the diversity and community structure of the indigenous microbiota on the fate of invading E. coli populations in the open environment is discussed. Such a relationship is of importance to our knowledge of both public and environmental health.

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“…Such methods might obviate source attribution, instead yielding geographic predictions of fecal pollution risk to water and food supplies and improving the ability of regulators to target landscapes for monitoring. Since E. coli ecology in secondary habitats is heavily impacted by land and waste management practices, the landscape genetics of E. coli should be considered across land uses (36).…”

Section: Discussionmentioning

confidence: 99%

Environmental Patterns Are Imposed on the Population Structure of Escherichia coli after Fecal Deposition

Bergholz

Noar

Buckley

2011

Appl Environ Microbiol

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The intestinal microbe Escherichia coli is subject to fecal deposition in secondary habitats, where it persists transiently, allowing for the opportunity to colonize new hosts. Selection in the secondary habitat can be postulated, but its impact on the genomic diversity of E. coli is unknown. Environmental selective pressure on extrahost E. coli can be revealed by landscape genetic analysis, which examines the influences of dispersal processes, landscape features, and the environment on the spatiotemporal distribution of genes in natural populations. We conducted multilocus sequence analysis of 353 E. coli isolates from soil and fecal samples obtained in a recreational meadow to examine the ecological processes controlling their distributions. Soil isolates, as a group, were not genetically distinct from fecal isolates, with only 0.8% of genetic variation and no fixed mutations attributed to the isolate source. Analysis of the landscape genetic structure of E. coli populations showed a patchy spatial structure consistent with patterns of fecal deposition. Controlling for the spatial pattern made it possible to detect environmental gradients of pH, moisture, and organic matter corresponding to the genetic structure of E. coli in soil. Ecological distinctions among E. coli subpopulations (i.e., E. coli reference collection [ECOR] groups) contributed to variation in subpopulation distributions. Therefore, while fecal deposition is the major predictor of E. coli distributions on the field scale, selection imposed by the soil environment has a significant impact on E. coli population structure and potentially amplifies the occasional introduction of stress-tolerant strains to new host individuals by transmission through water or food.

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Estimating the stability of Escherichia coli O157:H7 survival in manure‐amended soils with different management histories

Cited by 79 publications

References 48 publications

Interaction between the Microbial Community and Invading Escherichia coli O157:H7 in Soils from Vegetable Fields

Interaction between the Microbial Community and Invading Escherichia coli O157:H7 in Soils from Vegetable Fields

Survival of Escherichia coli in the environment: fundamental and public health aspects

Environmental Patterns Are Imposed on the Population Structure of Escherichia coli after Fecal Deposition

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