scholarly journals Action Levels for SARS-CoV-2 in Air: A Preliminary Approach

2020 ◽  
Author(s):  
Charles Nathan Haas
Keyword(s):  
Risk Assessment ◽  
Dose Response ◽  
Response Curve ◽  
Dose Response Curve ◽  
Quantitative Microbial Risk Assessment ◽  
Microbial Risk Assessment ◽  
Microbial Risk ◽  
Action Levels

Quantitative microbial risk assessment has been used to develop criteria for exposure to many microorganisms via various exposures. In this paper the dose response curve for Coronavirus 229E is used to develop preliminary risk based exposure criteria for SARS-CoV-2 via the respiratory portalsof entry.

scholarly journals Quantitative microbial risk assessment to estimate the health risk from exposure to noroviruses in polluted surface water in South Africa

2017 ◽  
Vol 15 (6) ◽  
pp. 908-922 ◽  
Author(s):  
Nicole Van Abel ◽  
Janet Mans ◽  
Maureen B. Taylor
Keyword(s):  
South Africa ◽  
Risk Assessment ◽  
Surface Water ◽  
Dose Response ◽  
Probabilistic Approach ◽  
International Studies ◽  
Quantitative Microbial Risk Assessment ◽  
Microbial Risk Assessment ◽  
Microbial Risk ◽  
Lower Socioeconomic

Abstract This study assessed the risks posed by noroviruses (NoVs) in surface water used for drinking, domestic, and recreational purposes in South Africa (SA), using a quantitative microbial risk assessment (QMRA) methodology that took a probabilistic approach coupling an exposure assessment with four dose-response models to account for uncertainty. Water samples from three rivers were found to be contaminated with NoV GI (80–1,900 gc/L) and GII (420–9,760 gc/L) leading to risk estimates that were lower for GI than GII. The volume of water consumed and the probabilities of infection were lower for domestic (2.91 × 10−8 to 5.19 × 10−1) than drinking water exposures (1.04 × 10−5 to 7.24 × 10−1). The annual probabilities of illness varied depending on the type of recreational water exposure with boating (3.91 × 10−6 to 5.43 × 10−1) and swimming (6.20 × 10−6 to 6.42 × 10−1) being slightly greater than playing next to/in the river (5.30 × 10−7 to 5.48 × 10−1). The QMRA was sensitive to the choice of dose-response model. The risk of NoV infection or illness from contaminated surface water is extremely high in SA, especially for lower socioeconomic individuals, but is similar to reported risks from limited international studies.

Enteric virus presence in green vegetables and associated irrigation waters in a rural area from Argentina. A quantitative microbial risk assessment

LWT ◽  
2021 ◽  
Vol 144 ◽  
pp. 111201 ◽  
Author(s):  
Prez Verónica Emilse ◽  
Victoria Matías ◽  
Martínez Laura Cecilia ◽  
Giordano Miguel Oscar ◽  
Masachessi Gisela ◽  
...  
Keyword(s):  
Risk Assessment ◽  
Rural Area ◽  
Enteric Virus ◽  
Quantitative Microbial Risk Assessment ◽  
Microbial Risk Assessment ◽  
Microbial Risk ◽  
Irrigation Waters
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