A Predictive Model for Survival of <i>Escherichia coli</i> O157:H7 and Generic <i>E. coli</i> in Soil Amended with Untreated Animal Manure

Pang, Hao; Mokhtari, Abdelrhani; Chen, Yuhuan; Oryang, David; Ingram, David T.; Sharma, Manan; Millner, Patricia D.; Doren, Jane M. Van

doi:10.1111/risa.13491

Cited by 22 publications

(12 citation statements)

References 63 publications

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“…The presence of these microorganisms in vegetables could be due to contamination at the farm level and/or cross-contamination during handling, processing, and storage. At the farm level, the presence of these microorganisms is often associated with fecal contamination, use of untreated irrigation water, inadequate composting of manure, and poor human handling as well (Atidégla et al, 2016;Carstens et al, 2019;Pang et al, 2018Pang et al, , 2020. Note that their presence could also be influenced by environmental conditions, such as temperature, wind speed, and precipitation (Pang et al, 2018(Pang et al, , 2020.…”

Section: Resultsmentioning

confidence: 99%

“…At the farm level, the presence of these microorganisms is often associated with fecal contamination, use of untreated irrigation water, inadequate composting of manure, and poor human handling as well (Atidégla et al, 2016;Carstens et al, 2019;Pang et al, 2018Pang et al, , 2020. Note that their presence could also be influenced by environmental conditions, such as temperature, wind speed, and precipitation (Pang et al, 2018(Pang et al, , 2020. Thus, a proper application of good agriculture practices by farmers would prevent and reduce bacterial contamination of vegetables at preharvest production.…”

Section: Resultsmentioning

confidence: 99%

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Predictive models for the growth of Salmonella spp., Listeria spp., and Escherichia coli in lettuce harvested on Taiwanese farms

Ndraha

Goh

Tran

et al. 2022

Journal of Food Science

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This study aimed at developing predictive models for Salmonella, Listeria, and E. coli in lettuce iceberg (Lactuca sativa) locally grown in Taiwan. The models were developed under constant temperature levels (5, 10, 15, 20, and 25 • C) and validated under dynamic temperature conditions (18 • C for 4 h, 7 • C for 48 h, 23 • C for 4 h). The result showed that (1) all strains were unable to grow at 5 • C except for standard strain of Listeria obtained from the BCRC and (2) the growth rate of locally isolated strains of Salmonella and Listeria was higher than the standard one at certain temperature levels and lower than the growth rates of E. coli. The findings in this study enhance our understanding about the growth variability between Salmonella, Listeria, and E. coli strains on vegetables locally grown in Taiwan and may be used to improve the management of proper storage temperature in the lettuce supply chain in this country. Considering the temperature recommendation for refrigerated food in Taiwan, the findings in this study therefore recommend that fresh vegetables (e.g., lettuce) should be stored at 5 • C or lower to prevent the rapid growth of these microorganisms. Finally, the developed models can be used in the assessment of the microbiological risk of Salmonella, Listeria, and E. coli contamination in lettuce locally grown in Taiwan.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Predictive models for the growth of Salmonella spp., Listeria spp., and Escherichia coli in lettuce harvested on Taiwanese farms

Ndraha

Goh

Tran

et al. 2022

Journal of Food Science

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“…Third, soil moisture can also determine the ability of a pathogen to persist and survive in soil. For example, one study found that pathogenic E. coli populations often peak following rainfall events [65] and another reported that rainfall and soil moisture were key factors influencing pathogenic E. coli survival [66]. Conversely, microbial growth decreases when soil becomes drier, as dry soils can impede microbial mobility, limit nutrient availability and slow nutrient diffusion through membranes [46].…”

Section: (B) How Soils Regulate the Establishment And Suppression Of Human/animal Pathogensmentioning

confidence: 99%

Role of soil in the regulation of human and plant pathogens: soils' contributions to people

Samaddar

Karp

Schmidt

et al. 2021

Phil. Trans. R. Soc. B

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Soil and soil biodiversity play critical roles in Nature's Contributions to People (NCP) # 10, defined as Nature's ability to regulate direct detrimental effects on humans, and on human-important plants and animals, through the control or regulation of particular organisms considered to be harmful. We provide an overview of pathogens in soil, focusing on human and crop pathogens, and discuss general strategies, and examples, of how soils' extraordinarily diverse microbial communities regulate soil-borne pathogens. We review the ecological principles underpinning the regulation of soil pathogens, as well as relationships between pathogen suppression and soil health. Mechanisms and specific examples are presented of how soil and soil biota are involved in regulating pathogens of humans and plants. We evaluate how specific agricultural management practices can either promote or interfere with soil's ability to regulate pathogens. Finally, we conclude with how integrating soil, plant, animal and human health through a ‘One Health’ framework could lead to more integrated, efficient and multifunctional strategies for regulating detrimental organisms and processes. This article is part of the theme issue ‘The role of soils in delivering Nature's Contributions to People’.

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“…Other workers analyzing the same large data set from Sharma et al (11) showed that soil moisture was highly predictive of E. coli levels as well. A number of factors related to rainfall were also relatively highly predictive of E. coli levels in soils containing BSAAO, including: number of days or rainfall since the previous day of analysis for E. coli levels (sampling day), average daily precipitation since the previous sampling day, average daily precipitation over the week prior to the sampling day, and days of rain over the week prior to the sampling day (25). Previous work has shown that moist soil supported the conversion of ammoniacal nitrogen (NH 3 -N) to NO 3 (26).…”

Section: Downloaded Frommentioning

confidence: 99%

Temporal and Agricultural Factors Influence Escherichia coli Survival in Soil and Transfer to Cucumbers

Litt

Kelly

Omar

et al. 2021

Appl Environ Microbiol

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Biological soil amendments of animal origin (BSAAO) increase nutrient levels in soils to support production of fruits and vegetables. BSAAOs may introduce or extend survival of bacterial pathogens which can transfer to fruits and vegetables to cause foodborne illness. Escherichia coli survival over 120 days in soil plots (3m2) covered with (mulched) or without plastic mulch (not mulched), amended with either poultry litter, composted poultry litter, heat treated poultry pellets, or chemical fertilizer and transfer to cucumbers in two years (2018, 2019) was evaluated. Plots were inoculated with E. coli (8.5 log CFU/m2) and planted with cucumber seedlings (Supremo). The number of days (d) needed to reduce E. coli levels by 4 log CFU (dpi4log) was determined using a sigmoidal decline model. RandomForest regression and one-way ANOVA (p < 0.05) identified predictors (soil properties and nutrients, weather factors) of dpi4log of E. coli and transfer to cucumbers. The combination of year, amendment and mulch (25.0%IncMSE) and year (9.75%IncMSE) were the most prominent predictors of dpi4log and transfer to cucumbers, respectively. Nitrate levels at 30d and soil moisture at 40d were also impactful predictors of dpi4log. Differing rainfall amounts in 2018 (24.9 in) and 2019 (12.6 in) affected E. coli survival in soils and transfer to cucumbers. Salmonella spp. were recovered sporadically from various plots, but were not recovered from cucumbers in either year. Greater transfer of E. coli to cucumbers was also shown to be partially dependent on dpi4log of E. coli in plots containing BSAAO. IMPORTANCE Poultry litter and other biological soil amendments are commonly used fertilizers in fruit and vegetable production and can introduce enteric pathogens like E. coli O157:H7 or Salmonella previously associated with outbreaks of illness linked to contaminated produce. E. coli survival duration in soils covered with plastic mulch or uncovered and containing poultry litter, heat-treated poultry litter pellets were evaluated. Nitrate levels on day 30 and moisture content in soils on day 40 on specific days were good predictors of E. coli survival in soils; however, knowledge of the combination of year, amendment and mulch type was a better predictor. Different cumulative rainfall totals from year to year most likely affected the transfer of E. coli from soils to cucumbers and survival durations in soil. E. coli survival in soils can be extended by the addition of several poultry litter based soil amendments commonly used in organic production of fruits and vegetables and is highly dependent on temporal variation in rainfall.

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A Predictive Model for Survival of Escherichia coli O157:H7 and Generic E. coli in Soil Amended with Untreated Animal Manure

Cited by 22 publications

References 63 publications

Predictive models for the growth of Salmonella spp., Listeria spp., and Escherichia coli in lettuce harvested on Taiwanese farms

Predictive models for the growth of Salmonella spp., Listeria spp., and Escherichia coli in lettuce harvested on Taiwanese farms

Role of soil in the regulation of human and plant pathogens: soils' contributions to people

Temporal and Agricultural Factors Influence Escherichia coli Survival in Soil and Transfer to Cucumbers

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