Cited by 665Infection Control and VentilationInhalation and Respiratory Drug DeliveryIndoor Air Quality and Microbial Exposure

The role of particle size in aerosolised pathogen transmission: a review

Open access
Gralton, Jan, Tovey, Euan, McLaws, Mary-Louise, Rawlinson, William D.·2011·Journal of Infection

Abstract

Understanding respiratory pathogen transmission is essential for public health measures aimed at reducing pathogen spread. Particle generation and size are key determinant for pathogen carriage, aerosolisation, and transmission. Production of infectious respiratory particles is dependent on the type and frequency of respiratory activity, type and site of infection and pathogen load. Further, relative humidity, particle aggregation and mucus properties influence expelled particle size and subsequent transmission. Review of 26 studies reporting particle sizes generated from breathing, coughing, sneezing and talking showed healthy individuals generate particles between 0.01 and 500 μm, and individuals with infections produce particles between 0.05 and 500 μm. This indicates that expelled particles carrying pathogens do not exclusively disperse by airborne or droplet transmission but avail of both methods simultaneously and current dichotomous infection control precautions should be updated to include measures to contain both modes of aerosolised transmission.

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Crossref · 10.1016/j.jinf.2010.11.010

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  • The majority of particles and their evaporated nuclei generated through human expiration activities have sizes varying from 0.05 to 500 μm.

    “Related investigations have shown that the majority of particles and their evaporated nuclei generated through human expiration activities have sizes varying from 0.05 to 500 μm [12–16].”

    From The protective performance of reusable cloth face masks, disposable procedure masks, KN95 masks and N95 respirators: Filtration and total inward leakage (2021) · cites this paper as [16]

    In “Particles in the past” (page unavailable), the review reports respiratory particles spanning <1.0–500 μm, and its study table includes a 0.05–5.0 μm range for breathing. These support the broad size range, but the review does not say that the majority of particles and evaporated nuclei fall within the specific combined range of 0.05–500 μm. (LLM, conf=0.86)

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Research works printed but not linked: 4

  1. [4]Gebhart J. Anselm A. Heyder J. Stalhofen W. The human lung as aerosol particle Generator Journal of Aerosol Medicine 1 1988 196 197
  2. [10]Wells W.F. On airborne infection: study II. Droplets and droplet nuclei American Journal of Hygiene 1934 20 1934 611 618
  3. [72]Strausz W. Z Hyg. 1926;105:416 [cited by Duguid, 1946].
  4. [109]Prescott L.M. Harley J.P. Klein D.A. Microbial growth. Microbiology 5th ed. 2002 McGraw-Hill New York pp. 118

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Authors
Gralton, J., Tovey, E., McLaws, M.-L., & Rawlinson, W. D.
Affiliations
  • UNSW Sydney (AU)
  • The University of Sydney (AU)
Corresponding author
Rawlinson, William D.
Venue
Journal of Infection
Publisher
Elsevier BV
Published
2011-01
Volume
62
Issue
1
Pages
1-13
ISSN
0163-4453 (ISSN-L)
OpenAlex
W2061609002
Cited by
665
References
131
Citations by year
2026: 26 · 2025: 41 · 2024: 58 · 2023: 70 · 2022: 68 · 2021: 134 · 2020: 128 · 2019: 23 · 2018: 15 · 2017: 15 · 2016: 20 · 2015: 17 · 2014: 9 · 2013: 19 · 2012: 18
FWCI
2.29
Type
journal article
Language
en
Open access
Locations
  • Journal of Infection (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Infection Control and Ventilation
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Inhalation and Respiratory Drug Delivery
  • Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Indoor Air Quality and Microbial Exposure
Keywords
respiratory pathogens, cough, sneezing, breathing, particle aggregation, relative humidity, airborne transmission, droplet transmission, infection control, pathogen load
MeSH terms
Aerosols, Humans, Humidity, Mucus, Particle Size, Respiratory Tract Infections, Disease Transmission, Infectious, Particulate Matter

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