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PM2.5-associated bacteria in ambient air: Is PM2.5 exposure associated with the acquisition of community-acquired staphylococcal infections?

Journal of Environmental Health Science and Engineering volume 18, pages 1007–1013 (2020)Cite this article

Abstract

Particulate matter (PM), a major component of air pollution, is an important carrier medium of various chemical and microbial compounds. Air pollution due to PM could increase the level of bacteria and associated adverse health effects. Staphylococci as important opportunistic pathogens that cause hospital- and community-acquired infections may transmit through air. This study aimed to obtain knowledge about the concentration of airborne bacteria as well as staphylococci associated with particulate matter with a diameter of less than 2.5 micrometers (PM2.5) in ambient air. The impact of meteorological factors including ultraviolet (UV) index, wind speed, temperature, and moisture on microbial concentrations was also investigated. Quartz filters were used to collect PM2.5 and associated bacteria in ambient air of a semiarid area. Airborne bacteria were quantified by culture method and Staphylococcus species identified by molecular methods. The mean (SD) concentration of PM2.5 and airborne bacteria was 64.83 (24.87) µg/m3 and 38 (36) colony forming unit (CFU)/m3, respectively. The results showed no significant correlation between the levels of PM2.5 and concentrations of bacteria (p < 0.05). Staphylococcus species were detected in 8 of 37 (22%) samples in a concentration from 3 to 213 CFU/m3. S. epidermidis was detected with the highest frequency followed by S. gallinarum and S. hominis, but S. aureus and methicillin-resistant Staphylococcus aureus (MRSA) were not detected. No significant correlation between the concentrations of bacteria with meteorological parameters was observed (p < 0.05). Our finding showed that, although the study area is sometimes subject to air pollution from PM2.5, the concentration of PM2.5- associated bacteria is relatively low. According to the results, PM2.5 may not be a source of community-associated staphylococcal infections.

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Funding

This research was supported by the Vice Chancellery for Research at the Isfahan University of Medical Sciences (Grant No 197050).

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Affiliations

  1. Student Research Committee and Department of Environmental Health Engineering, School of Health, Isfahan University of Medical Sciences, Isfahan, Iran

    Hossein Karimi

  2. Department of Environmental Health Engineering, School of Health, Isfahan University of Medical Sciences, Isfahan, Iran

    Mahnaz Nikaeen, Sahar Gholipour & Maryam Hatamzadeh

  3. Environment Research Center, Research Institute for Primordial Prevention of Non-Communicable Diseases, Isfahan University of Medical Sciences, Isfahan, Iran

    Mahnaz Nikaeen & Yaghoub Hajizadeh

  4. Department of Statistics and Epidemiology, School of Health, Isfahan University of Medical Sciences, Isfahan, Iran

    Akbar Hassanzadeh

Authors
  1. Hossein Karimi
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  2. Mahnaz Nikaeen
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  3. Sahar Gholipour
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  4. Maryam Hatamzadeh
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  5. Akbar Hassanzadeh
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Correspondence to Mahnaz Nikaeen.

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Karimi, H., Nikaeen, M., Gholipour, S. et al. PM2.5-associated bacteria in ambient air: Is PM2.5 exposure associated with the acquisition of community-acquired staphylococcal infections?. J Environ Health Sci Engineer 18, 1007–1013 (2020). https://doi.org/10.1007/s40201-020-00522-8

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  • DOI: https://doi.org/10.1007/s40201-020-00522-8

Keywords

  • Airborne bacteria
  • Air pollution
  • PM2.5
  • Staphylococci