Allergy Pollen Report from Hedberg Allergy & Asthma Center for November 9 — 13

This allergy report from Hedberg Allergy & Asthma Center contains the pollen and spore concentration report from the Roger’s sampler for the week of November 9 to November 13, 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.

11/9/2021 11/12/2021 11/13/2021
Molds Moderate = 8,063 Moderate = 10,287 Moderate = 7,706
Grasses Absent=0 Absent=0 Absent=0
Trees Absent=0 Absent=0 Absent=0
Other Weeds Absent=0 Absent=0 Absent=0
Ragweed Absent=0 Moderate=18 Low=2

Weekly Averages

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

Weekly Average
Molds Moderate = 8,685
Grasses Absent = 0
Trees Absent = 0
Other Weeds Absent = 0
Ragweed Low = 7

Allergen Types

The allergen types that were in highest concentration were:

  • Molds – Molds were at high concentration. Cladosporium, Ascomycetes and Basidiomycetes, PithomycesDrechslera AlternariaPenicillium/Aspergillus, Myxomycetes, Smuts, Curvularia, Nigrospora, and hyphal fragments were all observed.
  • Grasses – Grass pollen was at low to moderate concentration.
    Trees – Tree pollen was low to absent with Cupressaceae (juniper, cedar) and a single Ulmus (elm).
  • Other Weeds – Other weeds were low. Various unidentified Asteraceae (sunflowers, daisies) were noted.
  • Ragweed – Ambrosia (ragweed) was low to absent.

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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