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False Ragweed Allergy IgE Blood Test

The false ragweed allergy IgE blood test measures the amount of allergen-specific IgE antibodies in the blood to detect an allergy to false ragweed.


Test Code: 602965

Also Known As: Ragweed (False); Ragweed; Flatspine Bur Ragweed; Bursage Ragweed

Methodology: Thermo Fisher ImmunoCAP

Preparation: No special preparation required.

Test Results: 3-5 days. May take longer based on weather, holiday or lab delays.


Test Code: 2404

Also Known As: Ragweed (False); Ragweed; Flatspine Bur Ragweed; Bursage Ragweed

Methodology: Immunoassay (IA)

Preparation: No special preparation required.

Test Results: 3-5 days. May take longer based on weather, holiday or lab delays.

Description

Order a false ragweed allergy IgE blood test to detect an allergy to false ragweed. This test measures the amount of allergen-specific antibodies in a blood sample.

False ragweed pollen is one of the most common causes of seasonal allergies in the United States, where the plant is common. Individuals who have ragweed allergies are reacting to its pollen and are unlikely to go away once developed. False ragweed plants are a bushy summer annual. The leaves are grey-green, and the foliage is covered with whitish-grey bristly, short hairs. There are at least 17 ragweed species that grow in North America. The plants thrive in grasslands, dry slopes, coastal areas, sandy flats, forestry regeneration sites, other disturbed sites, and agricultural fields. 

False ragweed plants release tiny pollen grains into the air in the late spring and fall months and are both wind and insect-pollinated. The plant produces burs that are dispersed by sticking to clothing or shoes or the fur, feet, or feathers of animals.

An allergy to false ragweed triggers a reaction in an individual's immune system. The body views certain substances as toxic and produces IgE antibodies to these contaminants. These antibodies cause histamine to be released, which will cause the symptoms of an allergic reaction.

Allergy symptoms vary from one individual to the next ranging from mild to severe reactions, which can be experienced within minutes to hours after exposure. Common symptoms of a false ragweed allergy may include one or more of the following symptoms:

  • Coughing or wheezing
  • Itchy, watery eyes
  • Sinus pressure causing facial pain
  • Scratchy throat
  • Swollen, dark-colored skin under the eyes
  • Runny nose or congestion
  • Poor sleep
  • Decreased sense of taste or smell

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