scholarly journals Advancing Microbial Risk Assessments of Subsurface Water Sources

10.33540/131 ◽  
2020 ◽  
Author(s):  
◽  
Ho Shing (Alex) Chik
Keyword(s):  
Water Sources ◽  
Risk Assessments ◽  
Subsurface Water ◽  
Microbial Risk

Trends in conducting quantitative microbial risk assessments for water reuse systems: A review

2020 ◽  
Vol 16 ◽  
pp. 100132
Author(s):  
Veronika Zhiteneva ◽  
Uwe Hübner ◽  
Gertjan J. Medema ◽  
Jörg E. Drewes
Keyword(s):  
Water Reuse ◽  
Risk Assessments ◽  
Microbial Risk

scholarly journals Cheese Microbial Risk Assessments — A Review

2016 ◽  
Vol 29 (3) ◽  
pp. 307-314 ◽  
Author(s):  
Kyoung-Hee Choi ◽  
Heeyoung Lee ◽  
Soomin Lee ◽  
Sejeong Kim ◽  
Yohan Yoon
Keyword(s):  
Risk Assessments ◽  
Microbial Risk

scholarly journals Case studies in Bayesian microbial risk assessments

2009 ◽  
Vol 8 (Suppl 1) ◽  
pp. S19 ◽  
Author(s):  
Marc C Kennedy ◽  
Helen E Clough ◽  
Joanne Turner
Keyword(s):  
Case Studies ◽  
Risk Assessments ◽  
Microbial Risk

Guidelines for the safe use of wastewater in agriculture: revisiting WHO guidelines

2004 ◽  
Vol 50 (2) ◽  
pp. 31-38 ◽  
Author(s):  
R.M. Carr ◽  
U.J. Blumenthal ◽  
D. Duncan Mara
Keyword(s):  
Health Care ◽  
Drinking Water ◽  
Relevant Information ◽  
Epidemiological Studies ◽  
Risk Assessments ◽  
Who Guidelines ◽  
Microbial Risk ◽  
Scarce Resources ◽  
Health Measures ◽  
Hygiene Promotion

The use of wastewater in agriculture is occurring more frequently because of water scarcity and population growth. Often the poorest households rely on this resource for their livelihood and food security needs. However, there are negative health implications of this practice that need to be addressed. WHO developed Guidelines for the Safe Use of Wastewater in Agriculture in 1989. The Guidelines are currently being revised based on new data from epidemiological studies, quantitative microbial risk assessments and other relevant information. WHO guidelines must be practical and offer feasible risk management solutions that will minimize health threats and allow for the beneficial use of scarce resources. To achieve the greatest impact on health, guidelines should be implemented with other health measures such as: health education, hygiene promotion, provision of adequate drinking water and sanitation, and other health care measures.

scholarly journals Microbiological assessment of ambient waters and proposed water sources for restoration of a Florida wetland

2005 ◽  
Vol 3 (2) ◽  
pp. 89-100 ◽  
Author(s):  
W. Q. Betancourt ◽  
J. B. Rose
Keyword(s):  
Water Quality ◽  
Water Sources ◽  
Storm Water ◽  
Microbial Risk ◽  
Water Wells ◽  
Ambient Concentration ◽  
Pathogen Occurrence ◽  
Potential Public Health

This study evaluated the microbial quality of reclaimed and storm water as proposed sources for restoration of a Florida wetland. Bacterial indicators, bacteriophages and waterborne pathogenic microorganisms (Cryptosporidium, Giardia and infectious enteric viruses) were analysed during a 1-year period in order to determine potential public health risks associated with exposure to the proposed water sources for restoration. Ambient waters within the wetland (four active water wells and four major lakes) were included in the study in order to determine the microbial water quality before restoration. Storm water and lakes had the highest level of microbial contamination. Much lower levels of microbial indicators and waterborne pathogens were found in reclaimed water and groundwater. Pathogen occurrence in groundwater was intermittent. Owing to the small percentage of source waters (3.3%) migrating to the water wells, ambient concentration of microbial constituents in surface and groundwater could dominate microbial risk. The results of this study indicate that, in the light of the uncertainties involved in computing average Cryptosporidium concentrations, additional characterization of the current ambient water quality should be ongoing prior to restoration.

scholarly journals PENGELOLAAN SUMBER DAYA AIR BAWAH PERMUKAAN DENGAN TEKNOLOGI IMBUHAN BUATAN

2018 ◽  
Vol 7 (2) ◽  
Author(s):  
Teddy W Sudinda
Keyword(s):  
Ground Water ◽  
Water Resource ◽  
Natural Resource ◽  
Catchment Area ◽  
Artificial Recharge ◽  
Water Sources ◽  
Subsurface Water ◽  
Deep Aquifer ◽  
Direct Measurements ◽  
Filling Water

Subsurface water resource is a natural resource that is essential for life, and therefore must be preserved so that its presence can be used in a sustainable manner. Subsurface water sources should be managed in an integrated manner based on ground water basin that can be used optimally. For the preservation of groundwater using artificial recharge technology (shallow recharge wells, Deep recharge wells and reservoir recharge). The purpose of this study was to assess the ability of absorption of artificial recharge in the shallow, medium and deep aquifer. Absorption capability will be tested by direct measurements in the field by filling water into shallow recharge wells, deep recharge wells and reservoirs recharge in the catchment area. The more water that can be absorbed by means of artificial recharge capabilities can work well. From the results of research conducted can be seen that each has its own advantages and can be implemented in accordance with the existing field conditions. Keywords: Subsurface water, aquifer, Permeability, Artificial Feed

An integrated environmental modeling framework for performing Quantitative Microbial Risk Assessments

2014 ◽  
Vol 55 ◽  
pp. 77-91 ◽  
Author(s):  
Gene Whelan ◽  
Keewook Kim ◽  
Mitch A. Pelton ◽  
Jeffrey A. Soller ◽  
Karl J. Castleton ◽  
...  
Keyword(s):  
Environmental Modeling ◽  
Risk Assessments ◽  
Modeling Framework ◽  
Microbial Risk

Quantitative Microbial Risk Assessment for Escherichia coli O157:H7, Salmonella enterica, and Listeria monocytogenes in Leafy Green Vegetables Consumed at Salad Bars, Based on Modeling Supply Chain Logistics

2010 ◽  
Vol 73 (10) ◽  
pp. 1830-1840 ◽  
Author(s):  
S. O. TROMP ◽  
H. RIJGERSBERG ◽  
E. FRANZ
Keyword(s):  
Escherichia Coli ◽  
Supply Chain ◽  
Listeria Monocytogenes ◽  
Salmonella Enterica ◽  
Discrete Event ◽  
Risk Assessments ◽  
Fetal Mortality ◽  
Escherichia Coli O157 ◽  
Microbial Risk ◽  
Supply Chain Logistics

Quantitative microbial risk assessments do not usually account for the planning and ordering mechanisms (logistics) of a food supply chain. These mechanisms and consumer demand determine the storage and delay times of products. The aim of this study was to quantitatively assess the difference between simulating supply chain logistics (MOD) and assuming fixed storage times (FIX) in microbial risk estimation for the supply chain of fresh-cut leafy green vegetables destined for working-canteen salad bars. The results of the FIX model were previously published (E. Franz, S. O. Tromp, H. Rijgersberg, and H. J. van der Fels-Klerx, J. Food Prot. 73:274–285, 2010). Pathogen growth was modeled using stochastic discrete-event simulation of the applied logistics concept. The public health effects were assessed by conducting an exposure assessment and risk characterization. The relative growths of Escherichia coli O157 (17%) and Salmonella enterica (15%) were identical in the MOD and FIX models. In contrast, the relative growth of Listeria monocytogenes was considerably higher in the MOD model (1,156%) than in the FIX model (194%). The probability of L. monocytogenes infection in The Netherlands was higher in the MOD model (5.18 × 10−8) than in the FIX model (1.23 × 10−8). The risk of listeriosis-induced fetal mortality in the perinatal population increased from 1.24 × 10−4 (FIX) to 1.66 × 10−4 (MOD). Modeling the probabilistic nature of supply chain logistics is of additional value for microbial risk assessments regarding psychrotrophic pathogens in food products for which time and temperature are the postharvest preventive measures in guaranteeing food safety.

Food Consumption Data in Microbiological Risk Assessment

2004 ◽  
Vol 67 (9) ◽  
pp. 1972-1976 ◽  
Author(s):  
LEILA M. BARRAJ ◽  
BARBARA J. PETERSEN
Keyword(s):  
Risk Assessment ◽  
Food Consumption ◽  
Risk Assessments ◽  
Current Status ◽  
Microbial Risk Assessment ◽  
Microbial Risk ◽  
Individual Level ◽  
Consumption Data ◽  
Food Consumption Data ◽  
Summary Data

The 1st International Conference on Microbiological Risk Assessment: Foodborne Hazards was held in July 2002. One of the goals of that conference was to evaluate the current status and future needs and directions of the science of microbial risk assessment. This article is based in part on a talk presented at that meeting. Here, we review the types of food consumption data available for use in microbial risk assessments and address their strengths and limitations. Consumption data available range from total population summary data derived from food production statistics to detailed information, derived from national food consumption surveys, about the types and amounts of food consumed at the individual level. Although population summary data are available for most countries, detailed data are available for a limited number of countries and may only be available in summary format. Despite the relatively large amount of detailed information collected by these national surveys, information crucial to microbial risk assessments, such as the specific types of foods, the eating patterns of susceptible populations, or an individual's propensity for consuming high-risk foods (e.g., eating undercooked hamburgers, raw shellfish, or temperature-abused foods), are not collected during these surveys.

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