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Environmental Control for Indoor Allergens

Environmental Control for Indoor Allergens

House dust contains a variety of allergens such as insect parts, animal dander, and dust mites. Furthermore, mold may also be present in homes. It is important to eliminate as much allergen as possible from the home in order to derive maximum benefit from your treatment.

House Dust Mite is probably the most important allergen in most homes. Controlling house dust mite exposure will decrease symptoms in allergic patients and may decrease the risk of developing dust mite allergy in patients not yet sensitized. Dust mites are tiny microscopic creatures that thrive in warm, moist climates. Upholstery (particularly the bed) is the ideal habitat for dust mites because they need the protection of the padding and a food supply (shed human skin) to survive. They cannot thrive on non-porous surfaces or in cool dry climates.

There are simple things you can do to minimize dust mite exposure:

  • You should concentrate on the bedroom (particularly the bed) because this is where you spend most of your time. In fact, when you are sleeping, you are breathing with your mouth and nose inches from a whole army of dust mites. The bedroom should be clutter free.
  • Dusting should be done frequently with a damp cloth.
  • The humidity in the bedroom should be kept below 50%. In Central Oklahoma this generally requires only air condition, but may require a de-humidifier. Humidifiers encourage dust mite and mold growth and should be avoided.
  • The mattress, box spring and pillow should be encased in dust mite proof encasements. All items on the bed should be washed in hot water (140 degrees) every one to two weeks. Stuffed animals should be removed from the bed.
  • Upholstered furniture and wall to wall carpet contain dust mites and should be avoided if possible, but these are not nearly as important as the bed.
  • Air filters, expensive vacuum cleaners, and duct cleaning help only minimally. When vacuuming, a HEPA filter or double bag should be used to minimize dust mites being stirred up and released into the air.

Cockroaches are now recognized as important indoor allergens. Other insects such as lady bugs, spiders, and crickets have recently been implicated. Keep the home clean and dry and fix any leaks or drips. It may be necessary to have an exterminator treat the home periodically.

Animal dander, generally from cats and dogs (but sometimes from gerbils, hamster, guinea pigs, mice, etc.) is a very important source of allergen in dust. Contrary to popular belief, animal hair is not the problem. Rather, it is a protein in the urine, saliva and dander of animal that provokes allergy. There are no “nonallergenic” furred pets. Some individual animals produce more allergen than others but there are no “safe” breeds.

  • The best thing you can do if you are allergic is to eliminate the pet.
  • Keeping the animal outside is only a partial solution because people who handle the animals outside will bring the allergen in on their clothes.
  • If you cannot eliminate the pet, try to keep the pet in non-upholstered areas and never let the pet in the bedroom. A HEPA filter in the bedroom may provide some protection.
  • Bathing the animals weekly may decrease the amount of allergen they produce.
  • After the animal has been removed, it can take as long as a year for allergen levels in the home to drop significantly, so a good thorough cleaning of the home is necessary after eliminating the animal.

Recently some information has come to light which suggests that if you are not already allergic it may actually be helpful to have cats or dogs in the home. However, if you are already pet allergic having the pets around will only worsen your allergic symptoms.

Indoor Mold can also cause significant allergic respiratory symptoms. Homes with high humidity and/or leaks have a high likelihood of having significant indoor molds. Once these issues have been fixed, it is generally easy to eliminate molds, but if you continue to have problems with water leaks or high humidity, you will have a hard time cleaning up your mold. Use a cleaning solution containing 5% bleach and a small amount of detergent to clean up moldy areas. Performing house dust control measures will help as well.

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Stinging Insect Allergy Can Ruin Outdoor Activities

When most people get stung by an insect, the sting site gets red, swells and itches. However, for those who are allergic to insect stings, their immune system overreacts to the venom in the sting. For some, a sting might be life-threatening. The reaction – anaphylaxis – is a medical emergency and could be fatal. Symptoms might include two or more of the following – itching and hives, swelling in the throat or tongue, difficulty breathing, dizziness, stomach cramps, nausea or diarrhea. Severe cases could bring a rapid blood pressure fall resulting in shock and loss of consciousness.

“If you’ve ever had a reaction to a sting, you may be allergic,” said OAAC’s Board-Certified Allergist Dr. Dean Atkinson. “If you’ve had an anaphylactic reaction, you should ask for a referral to an allergist to learn how to stay safe in the future.”

Indentifying Stinging Insects

“If you do get stung and have a reaction, pay attention to what the insect was so you can tell your allergist,” Dr. Atkinson said.

Honeybees and bumblebees only sting when provoked. Africanized honeybees also known as killer bees have been found in the Southwestern U.S. are more aggressive and may sting in swarms.  Domesticated honeybees live in man-made hives. Wild honeybees live in colonies or honeycombs in hollow trees or building cavities.

Paper wasps have nests made of a paper-like material that forms a circular comb of cells which open downward. Nests are often located under eaves, behind shutters, or in shrubs or woodpiles.

Yellow jackets have nests made of a paper-mache type material and are usually underground but can also be found in frame building walls, masonry cracks or woodpiles.

Hornets are usually larger in size than yellow jackets. Their nests are gray or brown, football-shaped and made of a paper material similar to yellow jacket nests. Hornets’ nests are usually found up in trees and shrubs, on gables or in tree hollows.

Fire ants build nests of dirt in the ground – sometimes the nests can be 18 inches tall in the right kinds of soil.

“Preventing stings is of upmost importance,” said Dr. Atkinson. “If you find a nest around your home, you should call an exterminator to have it removed.”

Insects usually sting when their homes are disturbed. If you encounter stinging insects flying around you, remain calm and move away. Avoid wearing brightly colored clothing and perfume outdoors.  The smell of food attracts insects. Be extra careful when cooking, eating or drinking sweet drinks like soda or juice. Insects can crawl inside straws or canned drinks. Keep food covered until eaten. Wear closed-toe shoes outdoors and avoid going barefoot.

Treating Stings

If the insect stinger is in your skin, remove the stinger within 30 seconds to avoid receiving more venom. A quick scrape of your fingernail will remove the stinger and venom sac. Avoid squeezing the sac – this will force more venom through the stinger and into your skin.

“Raise the limb and apply a cold compress to reduce swelling and pain,” Dr. Atkinson said. “Gently clean the area with soap and water to prevent secondary infections. Don’t break any blisters. You can use topical steroid ointments or oral antihistamines to relieve the itching.”

Dr.  Atkinson adds that if swelling progresses or the sting site seems infected, contact your physician.

“If you are severely insect-allergy allergic, carry auto-injectable epinephrine,” Dr. Atkinson said.  “Learn how to use it and keep it with you at all times. Also, some patients especially with frequent exposure to the outdoors start venom immunotherapy (allergy shots). It reduces the risk of a future severe reaction to less than 5 percent.”

Epinephrine is a rescue medication and someone will need to take you to the emergency room. Dr. Atkinson also suggests wearing a bracelet or necklace that identifies the wearer as having severe allergies.

“For those who have had a serious reaction to an insect sting, make an appointment with an allergist,” he said. “With proper testing, your allergist can diagnose your allergy and determine the best form of treatment.”

The post Stinging Insect Allergy Can Ruin Outdoor Activities appeared first on Oklahoma Allergy and Asthma Clinic.

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