allergens causing allergic rhinitis

Introduction

Seasonal allergens

Allergen	season
Trees	-
1) birch	March-May
2) cottonwood	April-May
3) elm	February-May
4) cedar	March-May
5) oak*	May-June
6) maple*	March-May
Grasses	-
1) Kentucky blue	mid May-June
2) timothy*	mid May-June
3) orchard*	mid May-June
4) fescue*	mid May-June
Weeds	-
1) ragwood	August-September
2) kochia	July-September
3) Russian thistle	July-September
4) sage	July-September
5) march elder*	July-September
6) English plantain*	July-September
Outdoor molds	-
- alternaria	Spring-Fall

* of secondary importance

Perennial allergens

Household allergens

• cockroaches
• dust mites
  • Dermatophagoides farinae
  • Dermatophagoides pteronyssis
  • Blomia tropicalis

Animals

• cats
• rodents
• horses
• dogs
• chicken feathers (?)

Indoor molds

• Aspergillus
• Cladosporium
• Penicillium