Allergy Pollen Report from Hedberg Allergy & Asthma Center

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 12, 2021 to October 16, 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.

	10/12/2021	10/14/2021	10/16/2021
Molds	High = 20,742	High = 34,042	High = 18,281
Grasses	Moderate = 16	Low = 2	Absent = 0
Trees	Low = 6	Absent = 0	Absent = 0
Other Weeds	Moderate = 12	Absent = 0	Low = 4
Ragweed	Moderate = 27	Low = 2	Absent = 0

Weekly Averages

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

	Weekly Average
Molds	High = 24,355
Grasses	Moderate = 6
Trees	Low = 2
Other Weeds	Low = 5
Ragweed	Moderate = 10

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