Summary about Disease
Zelkova serrata, also known as Japanese Zelkova, is a tree commonly used for landscaping. While beautiful, its pollen can be a significant allergen for some individuals, triggering seasonal allergic reactions. This allergy is primarily a type I hypersensitivity reaction mediated by IgE antibodies.
Symptoms
Common symptoms of Zelkova serrata allergy include:
Sneezing
Runny or stuffy nose (rhinitis)
Itchy, watery eyes (conjunctivitis)
Coughing
Wheezing
Itchy throat
Skin rash or hives (less common)
Causes
The allergy is caused by exposure to Zelkova serrata pollen. When pollen is inhaled, the immune system of a sensitized individual identifies it as a threat. This triggers the production of IgE antibodies specific to the Zelkova serrata pollen. Upon subsequent exposure, these antibodies bind to the pollen and activate mast cells, releasing histamine and other chemicals that cause allergic symptoms.
Medicine Used
Common medications used to manage Zelkova serrata allergy symptoms include:
Antihistamines (oral or nasal sprays) to reduce sneezing, itching, and runny nose
Decongestants (oral or nasal sprays) to relieve nasal congestion
Nasal corticosteroids to reduce inflammation in the nasal passages
Eye drops (antihistamine or mast cell stabilizer) to relieve itchy, watery eyes
Allergy shots (immunotherapy) for long-term desensitization (under a doctor's supervision)
Is Communicable
No, Zelkova serrata allergy is not communicable. It is an allergic reaction to pollen and cannot be transmitted from person to person.
Precautions
Monitor pollen forecasts and limit outdoor activities on high pollen days.
Keep windows and doors closed, especially during peak pollen season.
Use air conditioning with a HEPA filter.
Shower and change clothes after spending time outdoors.
Wear a pollen mask when working outdoors.
Consult an allergist for testing and management strategies.
How long does an outbreak last?
The duration of symptoms depends on the pollen season and the individual's exposure level. Symptoms typically last for the duration of the Zelkova serrata pollen season, which is typically in the spring. Symptoms can last for several weeks or months.
How is it diagnosed?
Skin Prick Test: A small amount of Zelkova serrata pollen extract is introduced into the skin to see if a reaction occurs.
Blood Test (Specific IgE Test): Measures the amount of IgE antibodies specific to Zelkova serrata pollen in the blood.
Medical History and Physical Exam: The doctor will ask about your symptoms and medical history to help determine if you have an allergy.
Timeline of Symptoms
Symptoms typically begin during the Zelkova serrata pollen season (usually in the spring). The onset is relatively rapid, usually within minutes to hours of exposure to pollen. Symptoms can persist as long as the individual is exposed to the pollen.
Important Considerations
Symptoms can vary in severity from mild to debilitating.
Early diagnosis and management are essential for improving quality of life.
Immunotherapy (allergy shots) can provide long-term relief but require a commitment to regular injections over several years.
Individuals with asthma may experience worsening respiratory symptoms due to Zelkova serrata allergy and should have an asthma action plan.
Always consult a healthcare professional for diagnosis and treatment.