International Scientific Forum on Home Hygiene

Home Hygiene & Health

The Leading Source of Scientific, Professional & Consumer Information
International Scientific Forum on Home Hygiene

Home Hygiene & Health

The Leading Source of Scientific, Professional & Consumer Information

Evaluating infection risks and importance of hand hygiene during the household laundry process using a quantitative microbial risk assessment approach

Contaminated laundry contributes to infectious disease spread in residential and home health care settings. The objectives were to (1) evaluate pathogen transmission risks for individuals doing laundry, and (2) compare hand hygiene timing to reduce risks. Methods: A quantitative microbial risk assessment using experimental data from a laundry washing effectiveness study was applied to estimate infection risks from SARS-CoV-2, rotavirus, norovirus, nontyphoidal Salmonella, and Escherichia coli in 4 laundry scenarios: 1 baseline scenario (no hand hygiene event) and 3 hand hygiene scenarios (scenario 1: after moving dirty clothes to the washing machine, scenario 2: after moving washed clothes to the dryer, and scenario 3: hand hygiene events following scenario 1 and 2). Results: The average infection risks for the baseline scenario were all greater than 2 common risk thresholds ( 1.0 × 10 6 and 1.0 × 10 )4 . For all organisms, scenario 1 yielded greater risk reductions (39.95%-99.86%) than scenario 2 (1.35%-55.25%). Scenario 3 further reduced risk, achieving 1.0 × 10 6 (SARS-CoV-2) and 1.0 × 10 4 risk thresholds (norovirus and E. coli). The modeled results suggest individuals should reduce hand-to-facial orifice (eyes, nose, and mouth) contacts and conduct proper hand hygiene when handling contaminated garments.

Jung Y, Abney SE, Reynolds KA, Gerba CP, Wilson AM. Evaluating infection risks and importance of hand hygiene during the household laundry process using a quantitative microbial risk assessment approach. American Journal of Infection Control. 2023 Dec 1;51(12):1377-83.

https://www.researchgate.net/profile/Yoonhee-Jung-6/publication/371273125_Evaluating_infection_risks_and_importance_of_hand_hygiene_during_the_household_laundry_process_using_a_Quantitative_Microbial_Risk_Assessment_approach/links/66394b587091b94e93f5c984/Evaluating-infection-risks-and-importance-of-hand-hygiene-during-the-household-laundry-process-using-a-Quantitative-Microbial-Risk-Assessment-approach.pdf

 

Resource Link:

https://www.researchgate.net/profile/Yoonhee-Jung-6/publication/371273125_Evaluating_infection_risks_and_importance_of_hand_hygiene_during_the_household_laundry_process_using_a_Quantitative_Microbial_Risk_Assessment_approach/links/66394b587091b94e93f5c984/Evaluating-infection-risks-and-importance-of-hand-hygiene-during-the-household-laundry-process-using-a-Quantitative-Microbial-Risk-Assessment-approach.pdf