Fate of Escherichia coli originating from livestock faeces deposited directly onto pasture

Avery, Sheryl M.; Moore, A.; Hutchison, M. L.

doi:10.1111/j.1472-765x.2004.01501.x

Cited by 116 publications

(96 citation statements)

References 13 publications

(41 reference statements)

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“…The controls or pure pumice samples showed little growth by any culturing method tested as expected but soils with some vegetation and bird droppings revealed also low cell counts apart from aerobic bacteria growing at 30 • C. It is noteworthy that despite high vegetation and seagull activity, we measured low numbers of faecal coliforms except in one sample (SR-17) and a few other samples with bird droppings but none of the samples contained any of the pathogens that were tested for. This suggests that the coliforms and faecal coliforms cannot survive long in the soil (Avery et al, 2004;Sun et al, 2006).…”

Section: Surface Soil Samplesmentioning

confidence: 99%

Microbial colonization in diverse surface soil types in Surtsey and diversity analysis of its subsurface microbiota

et al. 2015

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Abstract. Colonization of life on Surtsey has been observed systematically since the formation of the island 50 years ago. Although the first colonisers were prokaryotes, such as bacteria and blue-green algae, most studies have been focused on the settlement of plants and animals but less on microbial succession. To explore microbial colonization in diverse soils and the influence of associated vegetation and birds on numbers of environmental bacteria, we collected 45 samples from different soil types on the surface of the island. Total viable bacterial counts were performed with the plate count method at 22, 30 and 37 • C for all soil samples, and the amount of organic matter and nitrogen (N) was measured. Selected samples were also tested for coliforms, faecal coliforms and aerobic and anaerobic bacteria. The subsurface biosphere was investigated by collecting liquid subsurface samples from a 181 m borehole with a special sampler. Diversity analysis of uncultivated biota in samples was performed by 16S rRNA gene sequences analysis and cultivation. Correlation was observed between nutrient deficits and the number of microorganisms in surface soil samples. The lowest number of bacteria (1 × 10 4

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Section: Surface Soil Samplesmentioning

confidence: 99%

Microbial colonization in diverse surface soil types in Surtsey and diversity analysis of its subsurface microbiota

et al. 2015

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“…It has been found that E. coli O157 can survive on surface vegetation for 6 weeks but persisted when injected subsurface (77). VTEC may then be transported over land or below the surface flow to surface and ground waters.…”

Section: Survival Of Vtec In Animal Wastementioning

confidence: 99%

Veterinary Public Health Approach to Managing Pathogenic Verocytotoxigenic Escherichia coli in the Agri-Food Chain

Duffy

McCabe

2014

Microbiol Spectr

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Verocytoxigenic Escherichia coli (VTEC) comprises many diverse serogroups, but seven serogroups, O157, O26, O103, O145, O111, O21, and O45, have been most commonly linked to severe human infections, though illness has also been reported from a range of other VTEC serogroups. This poses challenges in assessing the risk to humans from the diverse range of VTEC strains that may be recovered from animals, the environment, or food. For routine assessment of risk posed by VTEC recovered from the agri-food chain, the concept of seropathotype can be used to rank the human risk potential from a particular VTEC serogroup on the basis of both serotype (top seven serogroups) and the presence of particular virulence genes (vt in combination with eae, or aaiC plus aggR). But for other VTEC serogroups or virulence gene combinations, it is not currently possible to fully assess the risk posed. VTEC is shed in animal feces and can persist in the farm environment for extended periods ranging from several weeks to many months, posing an ongoing reservoir of contamination for grazing animals, water courses, and fresh produce and for people using farmland for recreational purposes. Appropriate handling and treatment of stored animal waste (slurries and manures) will reduce risk from VTEC in the farm environment. Foods of animal origin such as milk and dairy products and meat may be contaminated with VTEC during production and processing, and the pathogen may survive or grow during processing operations, highlighting the need for well-designed and validated Hazard Analysis Critical Control Point management systems. This article focuses on a veterinary public health approach to managing VTEC, highlighting the various routes in the agri-food chain for transmission of human pathogenic VTEC and general approaches to managing the risk.

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“…For instance, some agents can persist in soil for many months after exiting an animal's gastrointestinal tract [51,52]. The impact of animals at pasture can vary according to animal density.…”

Section: Agricultural Activitiesmentioning

confidence: 99%

Monitoring Recreational Waters: How to Integrate Environmental Determinants

Turgeon¹

2012

JEP

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Recreational waters are associated with a higher risk of disease for people engaged in activities that bring them into contact with these waters. The primary cause of contamination of recreational waters is fecal microorganisms, which may originate from various sources and involve several modulating factors, making it a complex public health and environmental issue. Monitoring recreational water quality should include two key components: Microbial water testing and monitoring environmental determinants associated with higher risks of contamination. Conducting both activities provides the foundation for a comprehensive assessment according to risk and the actual level of fecal pollution and thus could promote good management actions to ensure safe water quality. Nevertheless, monitoring of environmental determinants is rarely fully integrated in monitoring programs and is also harder to achieve, especially when water pollution is mainly associated with nonpoint sources. In order to achieve identification and monitoring of environmental determinants associated with fecal contamination of recreational waters, some specific steps should be followed and some questions must be answered. The objective of this review article is to present current knowledge on this topic and to suggest and discuss recommendations. Potential sources of contamination and factors able to modulate them should be identified and measured after the geographical area influencing fecal contamination of recreational water has been delineated. Statistical models have been developed to identify the relative importance of these environmental characteristics on fecal pollution of recreational waters but they do not allow for a full comprehension of the exact processes leading to this pollution, thus other methods should also be used to better understand these processes.

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Fate of Escherichia coli originating from livestock faeces deposited directly onto pasture

Cited by 116 publications

References 13 publications

Microbial colonization in diverse surface soil types in Surtsey and diversity analysis of its subsurface microbiota

Microbial colonization in diverse surface soil types in Surtsey and diversity analysis of its subsurface microbiota

Veterinary Public Health Approach to Managing Pathogenic Verocytotoxigenic Escherichia coli in the Agri-Food Chain

Monitoring Recreational Waters: How to Integrate Environmental Determinants

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