Study shows that smartphones are potential collecting containers for allergens

Study shows that smartphones are potential collecting containers for allergens

According to the 2018 US Census, smartphones are present in 85% of American households. They are reportedly viewed 14 million times a day, making them potential receptacles for environmental hazards like allergens. A new study presented at this year's annual scientific meeting of the American College of Allergy, Asthma and Immunology (ACAAI) in Louisville, Kentucky, showed elevated levels of cat and dog allergens as well as β-D-glucans (BDG) and endotoxin on simulated phone models.

Smartphones showed elevated and varying levels of BDG and endotoxin, and cat and dog allergens were found on pet owners' smartphones. BDGs are found in fungal cell walls and have been found in many environments and surfaces causing chronic respiratory and irritation symptoms - making BDGs a consistent marker for studying problematic molds. Endotoxin is a potent inflammatory agent and a marker of exposure to gram-negative bacteria.”

Hana Ruran, lead author of the study

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The researchers created phone models that were similar in size and finish to a real phone, and the front of the phone model was wiped down as part of the test. Electrostatic wipes (ESW) were used to sample simulated phone models from 15 volunteers, and the “phones” were then measured for allergens, BDG, and endotoxin levels.

The chemicals used in the cleaning mixed solutions (chlorhexidine, cetylpyridinium chloride, tannic acid, and benzyl benzoate) can be purchased through laboratories or chemical suppliers, but are not commercially available in the same concentrations as those used in the study. Isopropyl alcohol wipes were also tested for their cleaning properties.

“The chlorhexidine/cetylpyridinium combination was most effective in reducing BDG and endotoxin, and the benzyl benzoate/tannic acid combination was most effective in reducing cat and dog allergens on smartphones,” says Peter Thorne, PhD, a professor in the University of Iowa Department of Public Health and co-author of the Study. "The study shows exposure to inhaled allergens and molecules that trigger innate immune responses from a source that most people have not considered. If you have allergies or asthma, you should consider cleaning your smartphone more frequently to minimize exposure to these allergens and asthma triggers."

Source:

American College of Allergy, Asthma and Immunology (ACAAI)

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