Researchers have warned that playing a used music instrument can pose a potentially dangerous health risk.

"Most of these instruments have been played by other students, and without the proper sanitation, bacteria and fungi can thrive for weeks and even months after the last use," said Glass.
A total of 117 different sites, including the mouthpieces, internal chambers, and cases, were tested on 13 previously played instruments of a high school band. Six of the instruments had been played within a week of testing, while seven hadn't been touched in about one month.
The instruments produced 442 different bacteria, many of which were species of Staphylococcus, which can cause staph infections. Additionally, 58 molds and 19 yeasts were identified.
"Parents may not realize that the mold in their child's instrument could contribute to the development of asthma," said Glass.
Additionally, the yeasts on the instruments commonly cause skin infections around the mouth and lips.
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The study has been published in the issue of General Dentistry, the peer-reviewed clinical journal of the Academy of General Dentistry (AGD).