Conference Agenda

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Session Overview
WS13: Reducing the risk from indoor microbial pathogens through targeted hygienic cleaning and disinfection (STC13)
Tuesday, 14/June/2022:
10:30am - 12:00pm

Session Chair: Ju-Hyeong Park
Session Chair: Richard Shaughnessy
Location: CA101

Session Abstract


The concept of acquiring infectious agents from contact with contaminated surfaces and “bad air”, Miasma is age-old and predates the germ theory of disease. In more modern times, concerns about public health issues date back to at least the mid-19th century and to the work of the sanitary reformers, who themselves were the precursors of the public health movement. The history of the development of hygiene and cleaning practices dates to approximately the same period.

Due to significant advances in microbiome science over the past two decades, we are at the brink of a paradigm shift regarding the role of microbes in disease and health, from the Germ Theory of Disease to the Microbial Theory of Health where targeted cleaning and disinfection of high-risk surfaces rather than indiscriminate use is the goal.


This workshop will review what we know about microorganisms and pathogens in the built environment on surfaces and in the air and how they spread; specific case studies on cleaning effectiveness for hygiene will be presented and a tool for quantifying the infection risk reduction through various interventions will be introduced.

The session will consist of short presentations and structured discussion (90 mins total).


Microorganisms on floor surface of school classrooms- a study of 50 elementary schools in a large city in the U.S.

Ju-Hyeong Park NIOSH

Air-to-surface and surface-to-air dynamics in dissemination of microorganisms and pathogens throughout the indoor environment. Techniques to monitor and reduce air and surface contamination. Associated health effects.

Richard Shaughnessy University of Tulsa, USA

Ulla Haverinen-Shaughnessy University of Oulu, Finland & University of Tulsa, USA

The importance of cleaning for indoor air quality based on research

Leila Kakko Tampere University of Applied Sciences, Finland

Introduce Quantitative Microbial Risk Analysis (QRMA) and how this tool can be used to determine the effectiveness of hygiene intervention in reducing the risk of infection-spread indoors

Chuck Gerba or Kelly Reynolds University of Arizona, USA

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ID: 1717
Topics: 1a. Indoor air quality, health and wellbeing - Biologicals, gaseous, particles, 8a. Cleaning, hygiene and prevention of disease transmission - Surface contamination, air quality, 8c. Cleaning, hygiene and prevention of disease transmission - Disinfection
Keywords: cleaning, surface contamination, health, ATP, Covid

STC 13: Residual biological contamination on environmental surfaces, and implications for transmission of disease

Chair(s): Richard Shaughnessy (University of Tulsa, United States of America)

Presenter(s): Ju-Hyeong Park (Senior Researcher NIOSH), Ulla Haverinen-Shaughnessy (University of Oulu), Chuck Gerba (University of Arizona), Kelly Reynolds (University of Arizona)

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