A method to quantify infectious airborne pathogens at concentrations below the threshold of quantification by culture

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Date
2013-04-01
Authors
Wang, Chong
Cutler, Timothy
Wang, Chong
Hoff, Steven
Zimmerman, Jeffrey
Hoff, Steven
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StatisticsVeterinary Diagnostic and Production Animal MedicineAgricultural and Biosystems Engineering
Abstract

In aerobiology, dose-response studies are used to estimate the risk of infection to a susceptible host presented by exposure to a specific dose of an airborne pathogen. In the research setting, host- and pathogen-specific factors that affect the dose-response continuum can be accounted for by experimental design, but the requirement to precisely determine the dose of infectious pathogen to which the host was exposed is often challenging. By definition, quantification of viable airborne pathogens is based on the culture of micro-organisms, but some airborne pathogens are transmissible at concentrations below the threshold of quantification by culture. In this paper we present an approach to the calculation of exposure dose at microbiologically unquantifiable levels using an application of the “continuous-stirred tank reactor (CSTR) model” and the validation of this approach using rhodamine B dye as a surrogate for aerosolized microbial pathogens in a dynamic aerosol toroid (DAT).

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This article is from The Canadian Journal of Veterinary Research 77 (2013): 95. Posted with permission.

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