4.7 Article

Bacterial communities of hookah tobacco products are diverse and differ across brands and flavors

Journal

APPLIED MICROBIOLOGY AND BIOTECHNOLOGY
Volume 106, Issue 17, Pages 5785-5795

Publisher

SPRINGER
DOI: 10.1007/s00253-022-12079-7

Keywords

Tobacco; Hookah; Shisha; Microbiome; Bacteria

Funding

  1. National Cancer Institute [P50CA180523]
  2. FDA Center for Tobacco Products (CTP)

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Young adults are increasingly using non-cigarette products, such as hookahs, which are seen as healthier alternatives to cigarette smoking. However, the bacterial communities associated with hookah tobacco differ across brands and flavors, and may have important implications for the exposure to specific bacteria among hookah users.
Young adults are increasingly using non-cigarette products, such as hookahs, since they are perceived as healthier alternatives to cigarette smoking. However, hookah users are exposed to not only carcinogenic compounds but also microorganisms that may play an active role in the development of both infectious and chronic diseases among users. Nevertheless, existing hookah research in this area has focused only on microorganisms that may be transferred to users through the smoking apparatus and not on bacterial communities associated with hookah tobacco. To address this knowledge gap, we conducted time-series experiments on commercially available hookah brands (Al Fakher (flavors: two apple, mint, and watermelon) and Fumari (flavors: white gummy bear, ambrosia, and mint chocolate chill)) stored under three different temperature and relative humidity conditions over 14 days. To characterize bacterial communities, the total DNA was extracted on days 0, 5, 9, and 14, PCR-amplified for the V3V4 region of the bacterial 16S rRNA gene, sequenced on the Illumina HiSeq platform, and analyzed using R. Diversity (alpha and beta) analyses revealed that the microbiotas of Fumari and Al Fakher products differed significantly and that flavor had a significant effect on the hookah microbiota. Overall, Pseudomonas, Bacillus, Sphingomonas, and Methylobacterium were the predominant bacterial taxa across all products. Additionally, we observed compositional differences between hookah brands across the 14-day incubation. These data suggest that the bacterial communities of hookah tobacco are diverse and differ across brands and flavors, which may have critical implications regarding exposures to specific bacteria among hookah users.

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