• Bruce Lighthart
  • Alan Jeff Mohr


An aerosol is a colloidal suspension of liquid droplets or solid particles in air. A bioaerosol is then defined as an aerosol whose components contain, or have attached to them, one or more microorganisms. Consequently, a microbial bioaerosol contains microorganisms such as viruses, bacteria, fungi, protozoa, or algae that are usually viable, i.e., alive. Bioaerosols may be relatively solid particles or liquid droplets and range in size from a single microorganism to large droplets. These droplets may contain many microorganisms, pollen grains, and agglomerations and/or rafts of microorganisms attached to particulate plant debris, skin flakes, and/or soil particles (Fig. 1.1). Liquid droplets larger than one organism may change in size upon evaporation (or condensation), leaving an aeroplanktonic residue of nonvolatile solute, particulate matter and/or viable or non-viable microoganisms. (To avoid the confusion of the changing condition of a liquid droplet evaporating to a dry particle, bioaerosols in this state will be termed droplet/particles or D/Ps.)


Liquid Droplet Colloidal Suspension Large Droplet Aerosol Deposition Atmospheric Load 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Chapman & Hall, Inc. 1994

Authors and Affiliations

  • Bruce Lighthart
    • 1
  • Alan Jeff Mohr
    • 2
  1. 1.U.S. Environmental Protection AgencyCorvallisUSA
  2. 2.U.S. ArmyDugway Proving GroundDugwayUSA

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