Elsevier

Medical Hypotheses

Volume 118, September 2018, Pages 42-43
Medical Hypotheses

Resolution of chronic nasal Staphylococcus aureus infection in a non-smoker who started to use glycerine based e-cigarettes: Antibacterial effects of vaping?

https://doi.org/10.1016/j.mehy.2018.05.011Get rights and content

Abstract

Background

Smokers who switch to vaping report a decrease in respiratory infections. A previous case report of a non-smoker who started to vape and experienced a resolution of chronic tonsillitis proposed that this could be due to bactericidal effects of propylene glycol. Here were report a similar case where a resolution of chronic nasal infection was associated with using glycerol-based nicotine vaporiser.

Case presentation

A never-smoker adopted an e-cigarette that his wife was using and after a few weeks of vaping liquids containing vegetable glycerine with low levels of nicotine (3 mg/ml) experienced a complete resolution of chronic nasal Staphylococcus aureus infections.

Conclusions

The improvements cannot be attributed to smoking cessation or bactericidal effects of propylene glycol. The effect could be a coincidence, but it could also be related to bacteriostatic properties of glycerol, or to antimicrobial properties of nicotine and/or the zinc (II) complex of nicotine. Assessments of effects of e-cigarettes with different humectants and nicotine levels in patients with recurrent bacterial respiratory infections could clarify this issue and possibly generate new treatments.

Section snippets

Background

The details of health effects of using e-cigarettes (EC) remain controversial, but there is a consensus that they are much less risky than cigarettes [1]. E.g. their cancer potential has been estimated to be under 0.5% of that of smoking [2]. With large numbers of smokers switching to vaping (e.g. over 1.5 million in the UK – [3]), a signal has been emerging of a possible and unexpected beneficial effect of vaping. Internet vaping fora include frequent reports that vapers experience

Presentation

RC is a 63-year old emergency care physician. He is overall in good health, but suffered from recurring nasal infections since the late 1980s, when he first developed a severe and long lasting nasal infection. Symptoms when he had a flare included chronic nasal congestion, with bloody, green thick mucus and solid crusts, experienced throughout the day. He eventually got a culture of the nasal discharge examined and it was caused by Staphylococcus aureus. RC medicated with cephalexin and the

Discussion and conclusions

Smoking increases susceptibility to respiratory infections [6] but as RC is a non-smoker, the resolution of his infection cannot be ascribed to smoking cessation. He also does not use e-liquids containing propylene glycol. There are two other putative factors that could have been responsible for the effect observed here. Another possibility is of course a coincidence.

Vegetable glycerine has bacteriostatic properties that contribute to suppression of reproduction of bacteria [9]. As early as

Competing interests

Neither of the authors declare any conflict of interest.

Funding

The report required no external funding.

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