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, Pithomyces, Drechslera , Alternaria, Penicillium/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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