allergy plants. allergies disease of the immune system caused by common everyday organism not...
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Allergy Plants
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Allergies
Disease of the immune system Caused by common everyday organism
not foreign microorganisms About 20% of the US population suffers
from allergies over 50 million people Most common are hay fever (allergic
rhinitis) and asthma
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IgE Antibodies and Mast Cells
When allergenic protein attaches to IgE, it causes changes to the mast cell
Mast cell releases many chemicals like histamines, leukotrienes, prostaglandins,etc
Chemicals cause the allergy symptoms of respiratory allergies: hay fever or asthma intestinal symptoms of food allergiesskin allergies - eczema or dermatitis
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Mast Cells
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Hayfever Most common form of allergy In US, 35 to 40 million people afflicted Typical symptoms include sneezing, runny nose,
nasal congestion, watery and itchy eyes, itchy ears
Strongly linked to sinusitis, ear infections, nasal polyps, and asthma
We spend $2 billion annually on medication
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Airborne Allergens
Outdoor Allergens Pollen Fungal Spores
Indoor Allergens Fungal Spores Dust mites Cockroaches Animal Dander
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Hay Fever Plants
Produce abundant quantities of lightweight pollen that is dispersed by wind
Pollen can remain airborne for extended periods and often be carried long distances
Majority settles out close to their source Most important hay fever plants grow close
to human populations
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Wind Pollinated Flowers
Flowers small and inconspicuous often an inflorescence
Often lacking sepals and petals; no nectar
Pollen small, dry, light, and abundant
StigmaStigma
OvaryOvary
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Pollen Seasons in Tulsa
Trees -- Spring pollen starting in early February through May - greatest levels
Grasses -- Primarily May and June but some continuing all summer
Weeds -- August through October with ragweed the chief culprit One ragweed plant can release 1 billion pollen 1 million tons/year in North America
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Tulsa Tree Pollen Season
Red cedar Elm Maple Hackberry Cottonwood Sycamore Birch
Oak Ash Mulberry Pecan Willow Pine Walnut
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Oak Pollen - Most Abundant
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Short Ragweed-Ambrosia artemesiifolia
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Giant Ragweed - Ambrosia trifida
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Giant Ragweed
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Juniperus ashei
Juniperus ashei = Mountain cedar Arbuckle Mts of Oklahoma (500,000 acres)
Edwards Plateau of Texas Highly allergenic (cedar fever in Texas)
Tulsa allergist reported 15% patient sensitivity
Mid-winter pollination (Dec. and Jan.) Before the local tree pollen
Evidence of pollen in Tulsa atmosphere
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Distribution of Juniperus ashei
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