Allergy Pollen Report from Hedberg Allergy & Asthma Center for October 19 — 23

This allergy report from Hedberg Allergy & Asthma Center contains the pollen and spore concentration report from the Roger’s sampler for the week of October 19, 2021 to October 23, 2021.

Daily Averages

The following table contains the contains the daily concentration of particles in the air from midnight to midnight each day. Numbers are in particles per cubic meter and the corresponding NAB category, see below.

10/19/2021 10/21/2021 10/23/2021
Molds Moderate = 12,517 Moderate = 11,304 High = 15,574
Grasses High = 22 Moderate = 10 Moderate = 18
Trees Absent = 0 Absent = 0 Moderate = 36
Other Weeds Low = 8 Low = 6 Low = 6
Ragweed Moderate = 24 Low = 6 Moderate = 14

Weekly Averages

The weekly averages for each category of allergen were as follows:

Weekly Average
Molds Moderate = 13,132
Grasses Moderate = 17
Trees Low = 12
Other Weeds Low = 7
Ragweed Moderate = 15

Allergen Types

The allergen types that were in highest concentration were:

  • Molds – Molds were at moderate to very high concentration. Cladosporium, Ascomycetes and Basidiomycetes were abundant each day. Pithomyces, Drechslera were present each day. Alternaria, Penicillium/Aspergillus, Myxomycetes, Smuts, Curvularia, Nigrospora, and hyphal fragments were all noted as well. September 5 started out wet and was dominated by Ascomycetes and Basidiomycetes.
  • Grasses – Grass pollen was at moderate to low concentration. Trees – Tree pollen was absent.
  • Other Weeds – Other weeds were high to moderate. Amaranthaceae (Amaranths, Chenopodium) were moderate to low. Plantago (plantain), various unidentified Asteraceae (sunflowers, daisies), Xanthium (cockleburs), and Artemisia (mugworts, wormwood) were in low numbers on each day.
  • Ragweed – Ambrosia (ragweed) was high through the week.

Notes

The National Allergy Bureau (NAB) sets categories for airborne allergen concentration according to the following table. All concentration ranges in particles per cubic meter.

NAB Standard Mold Grass Trees Other Weeds Ragweed
Absent 0 0 0 0 0
Low 1 – 6,499 1 – 4 1 – 14 1 – 9 1 – 9
Moderate 6,500 – 12,999 5 – 19 15 – 89 10 – 49 10 – 49
High 13,000 – 49,999 20 – 199 90 – 1,499 50 – 499 50 – 499
Very High > 50,000 > 200 > 1,500 > 500 > 500

Reference: 

Haley Burden
Hedberg Allergy & Asthma Center
479.787.0440

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