How do atmospheric conditions affect the dispersion of mold that cause allergic rhinitis (hay fever)?

Updated: May 18, 2018
  • Author: Javed Sheikh, MD; Chief Editor: Michael A Kaliner, MD  more...
  • Print
Answer

Atmospheric conditions can affect the growth and dispersion of a number of molds; therefore, their airborne prevalence may vary depending on climate and season.

For example, Alternaria and Cladosporium are particularly prevalent in the dry and windy conditions of the Great Plains states, where they grow on grasses and grains. Their dispersion often peaks on sunny afternoons. They are virtually absent when snow is on the ground in winter, and they peak in the summer months and early fall.

Aspergillus and Penicillium can be found both outdoors and indoors (particularly in humid households), with variable growth depending on the season or climate. Their spores can also be dispersed in dry conditions.


Did this answer your question?
Additional feedback? (Optional)
Thank you for your feedback!