Sampling port for real-time analysis of bioaerosol in whole body exposure system for animal aerosol model development

Divey Saini, Gregory W. Hopkins, Ching Ju Chen, Sarah A. Seay, Eva M. Click, Sunhee Lee, Justin M. Hartings, Richard Frothingham

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Introduction: Multiple factors influence the viability of aerosolized bacteria. The delivery of aerosols is affected by chamber conditions (humidity, temperature, and pressure) and bioaerosol characteristics (particle number, particle size distribution, and viable aerosol concentration). Measurement of viable aerosol concentration and particle size is essential to optimize viability and lung delivery. The Madison chamber is widely used to expose small animals to infectious aerosols. Methods: A multiplex sampling port was added to the Madison chamber to measure the chamber conditions and bioaerosol characteristics. Aerosols of three pathogens (Bacillus anthracis, Yersinia pestis, and Mycobacterium tuberculosis) were generated under constant conditions and their bioaerosol characteristics were analyzed. Airborne microbes were captured using an impinger or BioSampler. The particle size distribution of airborne microbes was determined using an aerodynamic particle sizer (APS). Viable aerosol concentration, spray factor (viable aerosol concentration/inoculum concentration), and dose presented to the mouse were calculated. Dose retention efficiency and viable aerosol retention rate were calculated from the sampler titers to determine the efficiency of microbe retention in lungs of mice. Results: B. anthracis, Y. pestis, and M. tuberculosis aerosols were sampled through the port. The count mean aerodynamic sizes were 0.98, 0.77, and 0.78 μ with geometric standard deviations of 1.60, 1.90, and 2.37, and viable aerosol concentrations in the chamber were 211, 57, and 1 colony-forming unit (CFU)/mL, respectively. Based on the aerosol concentrations, the doses presented to mice for the three pathogens were 2.5e5, 2.2e4 and 464. CFU. Discussion: Using the multiplex sampling port we determined whether the animals were challenged with an optimum bioaerosol based on dose presented and respirable particle size.

Original languageEnglish (US)
Pages (from-to)143-149
Number of pages7
JournalJournal of Pharmacological and Toxicological Methods
Volume63
Issue number2
DOIs
StatePublished - Mar 1 2011
Externally publishedYes

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Aerosols
Animals
Animal Models
Sampling
Particle Size
Yersinia pestis
Bacillus anthracis
Pathogens
Mycobacterium tuberculosis
Particle size analysis
Aerodynamics
Stem Cells
Particle size
Microbial Viability
Lung
Bacilli
Humidity
Particles (particulate matter)
Atmospheric humidity
Bacteria

Keywords

  • Animal models
  • Bacillus anthracis
  • Bioaerosol
  • Diameter
  • Dosimetry
  • Inhalation
  • Methods
  • Mycobacterium tuberculosis
  • Sampling
  • Yersinia pestis

ASJC Scopus subject areas

  • Toxicology
  • Pharmacology

Cite this

Sampling port for real-time analysis of bioaerosol in whole body exposure system for animal aerosol model development. / Saini, Divey; Hopkins, Gregory W.; Chen, Ching Ju; Seay, Sarah A.; Click, Eva M.; Lee, Sunhee; Hartings, Justin M.; Frothingham, Richard.

In: Journal of Pharmacological and Toxicological Methods, Vol. 63, No. 2, 01.03.2011, p. 143-149.

Research output: Contribution to journalArticle

Saini, Divey ; Hopkins, Gregory W. ; Chen, Ching Ju ; Seay, Sarah A. ; Click, Eva M. ; Lee, Sunhee ; Hartings, Justin M. ; Frothingham, Richard. / Sampling port for real-time analysis of bioaerosol in whole body exposure system for animal aerosol model development. In: Journal of Pharmacological and Toxicological Methods. 2011 ; Vol. 63, No. 2. pp. 143-149.
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AU - Hopkins, Gregory W.

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AU - Seay, Sarah A.

AU - Click, Eva M.

AU - Lee, Sunhee

AU - Hartings, Justin M.

AU - Frothingham, Richard

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KW - Yersinia pestis

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