Scientists have issued a new warning to vapers after discovering that mouthpieces on disposable vapes are breeding grounds for harmful fungi. A study from the University of Florida found that more than 50 per cent of the devices tested were 'abundantly colonised' with fungi, with 80 per cent of the species identified capable of causing ill health.
The research, which examined disposable vapes from 25 daily users, revealed that while few devices harboured bacteria, fungi were prevalent. Among the most concerning findings were pathogens linked to lung diseases such as bronchitis, and Cystobasidium minutum, a fungus that can infect the blood of individuals with weakened immune systems.
Lead author Dr Jason Smith of the Emerging Pathogens Institute told New Scientist: 'The residues left behind inside the vape device may provide a food source for moulds to grow.' The enclosed design and repeated heating of the devices are thought to contribute to the problem.
The study compared fungal samples from the vapes with cultures taken from participants' mouths, confirming the fungi did not originate from the users. Researchers believe the microbes may come from the air, hands, or other everyday objects, or could be present in the vape liquids at the time of purchase.
While vaping is often promoted as a safer alternative to smoking tobacco, the researchers argue that contamination of mouthpieces could contribute to the development of chronic obstructive pulmonary disease (COPD). However, they stressed that current evidence is not robust enough to confirm that the fungi are present in sufficient quantities to cause illness.
Vapers are being urged to clean their mouthpieces regularly to reduce the risk of fungal buildup. The study highlights the need for further research into the microbial risks associated with vaping, which has only been widely used for a few years.
