A scoping study characterizing prevalence, risk factor and intervention research, published between 1990 and 2010, for microbial hazards in leafy green vegetables

Ilić, Sanja; Rajić, Andrijana; Britton, Constance J.; Grasso, Elizabeth M.; Wilkins, Wendy; Totton, Sarah C.; Wilhelm, Barbara; Waddell, Lisa; LeJeune, Jeffrey T.

doi:10.1016/j.foodcont.2011.06.027

Cited by 44 publications

(26 citation statements)

References 27 publications

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“…Therefore, many review studies have been conducted in an effort to summarize the microbial contamination routes and persis tence in produce fields. However, of the review studies (16, 17, 32-34, 48, 67, 125), including a scoping study (67), only a few may have taken into account study design and quality in determining causality and association. For example, many of the reviewed studies were crosssectional or in general provided weak evidence.…”

mentioning

confidence: 99%

Risk Factors for Microbial Contamination in Fruits and Vegetables at the Preharvest Level: A Systematic Review

Park

Szonyi

Gautam

et al. 2012

Journal of Food Protection

169

119

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The objective of this study was to perform a systematic review of risk factors for contamination of fruits and vegetables with Listeria monocytogenes, Salmonella, and Escherichia coli O157:H7 at the preharvest level. Relevant studies were identified by searching six electronic databases: MEDLINE, EMBASE, CAB Abstracts, AGRIS, AGRICOLA, and FSTA, using the following thesaurus terms: L. monocytogenes, Salmonella, E. coli O157 AND fruit, vegetable. All search terms were exploded to find all related subheadings. To be eligible, studies had to be prospective controlled trials or observational studies at the preharvest level and had to show clear and sufficient information on the process in which the produce was contaminated. Of the 3,463 citations identified, 68 studies fulfilled the eligibility criteria. Most of these studies were on leafy greens and tomatoes. Six studies assessed produce contamination with respect to animal host-related risk factors, and 20 studies assessed contamination with respect to pathogen characteristics. Sixty-two studies assessed the association between produce contamination and factors related to produce, water, and soil, as well as local ecological conditions of the production location. While evaluations of many risk factors for preharvest-level produce contamination have been reported, the quality assessment of the reviewed studies confirmed the existence of solid evidence for only some of them, including growing produce on clay-type soil, the application of contaminated or non-pH-stabilized manure, and the use of spray irrigation with contaminated water, with a particular risk of contamination on the lower leaf surface. In conclusion, synthesis of the reviewed studies suggests that reducing microbial contamination of irrigation water and soil are the most effective targets for the prevention and control of produce contamination. Furthermore, this review provides an inventory of the evaluated risk factors, including those requiring more research.

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mentioning

confidence: 99%

Risk Factors for Microbial Contamination in Fruits and Vegetables at the Preharvest Level: A Systematic Review

Park

Szonyi

Gautam

et al. 2012

Journal of Food Protection

169

119

View full text Add to dashboard Cite

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“…For these reasons, research synthesis methodologies are recommended as the cornerstone of evidence-informed policy making (EIPM) in health and other sectors, including agrifood public health (Anonymous, 2010a,b). Scoping studies (ScS) and systematic review and meta-analysis (SR-MA) are used, respectively, to identify relevant interventions and to estimate their efficacy (Arksey and O'Malley, 2005;Ilic et al, 2011;Sargeant et al, 2006;Wilhelm et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Assessment of the efficacy and quality of evidence for five on-farm interventions for Salmonella reduction in grow-finish swine: A systematic review and meta-analysis

Wilhelm

Rajić

Parker

et al. 2012

Preventive Veterinary Medicine

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“…In this study, water for irrigation and washing/rinse purpose was contaminated with E. coli O157H7, therefore; there is a risk of contamination of final products. Foodborne outbreaks involving green vegetables contaminated by water have been reported in several studies around the world [10,14]. Pathogenic bacteria such as E. coli O157:H7 are most often associated with outbreaks of waterborne diseases, resulting from inadequate treatment of water used for irrigation and washing of fresh produce [15][16][17][18].…”

Section: Resultsmentioning

confidence: 99%

“…Microbiological contamination of these herbs triggered serious concern in the production of therapeutical medicine preparations. Therefore, there was a need to improve the microbiological quality of fresh/dried herbs using different decontamination technology and the decontamination treatments should be fast and effective against all microorganisms [14].…”

Section: Introductionmentioning

confidence: 99%

Effectiveness of Irradiation Treatment in Eliminating E. coli O157:H7 and Salmonella in Dried Organic Herb Samples Intended for Use in Blended Tea

Zaman¹

2015

JFNS

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Abstract:Blended tea with different herbs, seeds and dehydrated vegetable substances bring a world of flavours, aromas and colours to tea. Tea is usually made with dried tea leaves, or blended with other dried herbs and pouring boiling water over the leaves and letting them stay for a few minutes and then sip. This study was done to evaluate the microbial contamination of dried organic lemongrass, mint and jasmine samples intended to prepare flavoured tea and also to see the effect of gamma irradiation in inactivating microorganisms in dried organic herbs (lemongrass, mint and jasmine) samples intended to prepare flavoured tea. Presence of higher number of generic E. coli and pathogenic E. coli O157:H7 in dried organic lemongrass, mint, and jasmine samples, and blended tea samples were observed. No Salmonella was detected in dried lemongrass sample; however, presence of Salmonella was evident in mint and jasmine samples. Application of 2.0 kGy irradiation dose was able to successfully eliminate the pathogenic E. coli O157:H7 and Salmonella in lemongrass, mint and jasmine samples. In addition, the aerobic bacterial count was also reduced to <100 CFU/g in dried lemongrass or other tea samples. This finding suggested that application of 2.0 kGy dose of irradiation could successfully eliminate the pathogens and provide safe food with lower bacterial content compared to non-irradiated herbs for human consumption.

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A scoping study characterizing prevalence, risk factor and intervention research, published between 1990 and 2010, for microbial hazards in leafy green vegetables

Cited by 44 publications

References 27 publications

Risk Factors for Microbial Contamination in Fruits and Vegetables at the Preharvest Level: A Systematic Review

Risk Factors for Microbial Contamination in Fruits and Vegetables at the Preharvest Level: A Systematic Review

Assessment of the efficacy and quality of evidence for five on-farm interventions for Salmonella reduction in grow-finish swine: A systematic review and meta-analysis

Effectiveness of Irradiation Treatment in Eliminating E. coli O157:H7 and Salmonella in Dried Organic Herb Samples Intended for Use in Blended Tea

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