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Respiratory Symptoms From Inhaled Substances

Respiratory Symptoms From Inhaled Substances

Allergens

An allergen is a substance which is capable of initiating an allergic reaction. The most important inhaled allergens are tiny invisible pollen grains, mold spores, house dust and animal danders.

Allergy-causing pollens come from plant flowers which at certain times of the year release large quantities of light buoyant pollen which can be carried for miles by the wind. These flowers are inconspicuous and often don’t really look like blossoms. They include trees which pollinate in spring, grasses in summer, and weeds in the fall. (See OAAC educational material handout Pollen Seasons) Ornamental flowers are generally not very important in allergy. They have large sticky pollen grains that are carried to other flowers by insects. They are not sufficiently abundant in the air to cause symptoms unless an allergic person is very close to them. However, some ornamental flowers are related to weeds. This is why some ragweed-allergic patients have symptoms when they are close to chrysanthemums, zinnias, asters, daisies, etc.

There are many types of molds in our environment. They have varying preferences for the types of places and conditions under which they grow into colonies. Some prefer to colonize indoors, some outdoors. The spores released by colonies are carried through the air to new places suitable for new colony formation. These spores are smaller than pollen grains but like pollens can cause allergic symptoms when they are inhaled.

The important constituents of house dust are the products of microscopic organisms found in most homes. House dust mites and molds thrive in warm moist conditions.

Like humans, fur-bearing animals continually grow new layers of skin. The indoor pet’s “dander” (tiny flakes of the outer layer of skin) falls off, disintegrates, and causes symptoms when inhaled. During early stages of allergy to a pet, patients are often unaware that the animal is contributing to their symptoms.

If a person is allergic to a pet, he/she should strictly avoid the animal. Outdoor pets are not of major concern. Pets that are confined to a limited part of the house (such as a tiled or wood-floored utility room and kitchen) are better then pets that contaminate the entire house. At the very least, pets should be kept out of the allergic person’s bedroom at all times. (See OAAC educational material handout Environmental Controls for Indoor Allergens.)

Irritants

An irritant is a substance which may trigger certain symptoms strictly because of its irritating effects. The symptoms mimic allergy, but in fact they are not really the result of an allergic reaction. Some individuals are extremely sensitive to these inhales substances (which incidentally bother the average person very little). The basis for this extreme membrane sensitivity is not well understood, but it is not allergy.

The most common offenders are smoke, cold air, wind, temperature changes, and weather fronts. Other provoking factors which bother some people in varying degrees include sharp pungent odors (paint, turpentine, aerosol sprays, perfumes, cleansers, cosmetics, chemical odors, exhaust smoke, insecticides, detergents and new fabric odors).

Respiratory infection is included in this category as is external wheezing in asthmatics.

Some substances are not only allergens or irritants but can be both. Examples include house dust, feed and grain dusts, and live Christmas trees. In any given patient allergens, irritants or a combination of both may be of major importance in the production of either asthma or nasal symptoms.

Occasionally patients who are sensitive to both irritants and allergens will have useful reduction in nasal and chest symptoms caused by irritants when their allergies are successfully treated. More commonly their susceptibility to irritants remains a separate problem and the treatment is by appropriate medication and avoidance. Irritant induced symptoms are more difficult to treat than those from allergens.

Recent News

Oklahoma City Ranks Ninth for Most Challenging Cities for Allergies
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Oklahoma City Ranks Ninth for Most Challenging Cities for Allergies

The Asthma and Allergy Foundation of America (AAFA) released Feb. 23 its annual Allergy Capitals™ report for 2021 which identifies the most challenging cities for spring and fall allergies in the top 100 metropolitan areas in the United States. Oklahoma City was ranked ninth. Scranton, Pennsylvania took the top spot for 2021.

Cities are ranked based on three factors: spring and fall pollen scores, over-the-counter medicine use, and availability of board-certified allergists. Richmond, Virginia held the #1 title in 2020. The top 20 Allergy Capitals™ for 2021 are: 1. Scranton, Pennsylvania; 2. Richmond, Virginia; 3. Wichita, Kansas; 4. McAllen, Texas; 5. Pittsburgh, Pennsylvania; 6. Hartford, Connecticut; 7. Springfield, Massachusetts; 8. New Haven, Connecticut; 9. Oklahoma City, Oklahoma; 10. Bridgeport, Connecticut; 11. Albany, New York; 12. Virginia Beach, Virginia; 13. Buffalo, New York; 14. San Antonio, Texas; 15. Dayton, Ohio; 16. Riverside, California; 17. Las Vegas, Nevada; 18. Memphis, Tennessee; 19. Dallas, Texas; and 20. Louisville, Kentucky. Tulsa, Oklahoma was ranked 21.

“Allergies are a serious public health concern. More than 24 million people in the U.S. have seasonal allergic rhinitis, more commonly referred to as hay fever. Pollen allergies are a major cause. AAFA’s Allergy Capitals™ report helps more Americans make sense of the impact on individual and community health,” says Kenneth Mendez, CEO and president of AAFA. “Two notable parts of our 2021 report include the effect of COVID-19 and climate change on seasonal allergies. In 2020, fewer people felt the impact of pollen allergies. This is likely due to COVID-19 restrictions with more people staying indoors. But climate change continues to cause longer and more severe allergy seasons. If we don’t slow down the cycle, pollen production will only intensify. This means symptoms could worsen as climate change continues to evolve.”

Seasonal pollen allergies cause nasal, sinus, and other symptoms each spring through fall. Pollen can also trigger asthma attacks. Tree pollen season starts as early as January in some parts of the U.S. and continues through summer. In the fall, weed pollen including ragweed, causes symptoms. But relief is possible with the right treatment and by managing contact with pollen. Oklahoma City just had several allergy alert days in March for cedar and elm tree pollen which is always problematic in the winter months.

“It’s important people with seasonal allergies prepare. They should try their best to reduce exposure to pollen,” says Dr. Mitchell Grayson, chair of AAFA’s Medical Scientific Council and Director of the Division of Allergy and Immunology at Nationwide Children’s Hospital and The Ohio State University. “Schedule an appointment with your allergist to work on a treatment plan together to help reduce allergy symptoms when prevention is not enough.”

Treatment options include over-the-counter or prescription allergy medicines. Medications are most effective when started before allergy season begins.

“If medicines are not helping, it is important to establish care with an allergist to discuss what treatment options are best to reduce your allergy symptoms and attacks,” said Oklahoma Allergy & Asthma Board Certified Allergist (OAAC) Dr. Laura Chong.

The Allergy Capitals™ ranking is an annual research and educational project of AAFA, designed to help patients recognize, prevent and safely treat allergy symptoms. Through this ranking, AAFA raises awareness about the impact of seasonal allergies and provides helpful information designed to improve the quality of life for people who experience them. The ranking is based on local spring and fall pollen levels, use of allergy medication and the number of board-certified allergists in each metro area. Visit allergycapitals.com to see the full list, study methodology and learn more about allergy diagnosis, prevention and treatment.

To see the complete, 100-city list go to allergycapitals.com. The report lists overall annual rankings and breaks down a seasonal ranking for spring and fall.

The post Oklahoma City Ranks Ninth for Most Challenging Cities for Allergies appeared first on Oklahoma Allergy and Asthma Clinic.

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