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Production of volatile organic compounds by mycobacteria

McNerney, Ruth; Mallard, Kim; Okolo, Phyllis and Turner, Claire (2012). Production of volatile organic compounds by mycobacteria. FEMS Microbiology Letters, 328(2) pp. 150–156.

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The need for improved rapid diagnostic tests for tuberculosis disease has prompted interest in the volatile organic compounds (VOCs) emitted by Mycobacterium tuberculosis complex bacteria. We have investigated VOCs emitted by Mycobacterium bovis BCG grown on Lowenstein Jensen media using selected ion flow tube mass spectrometry and thermal desorption-gas chromatography-mass spectrometry. Compounds observed included dimethyl sulphide, 3-methyl-1-butanol, 2-methyl-1-propanol, butanone, 2-methyl-1-butanol, methyl 2-methylbutanoate, 2-phenylethanol and hydrogen sulphide. Changes in levels of acetaldehyde, methanol and ammonia were also observed. The compounds identified are not unique to M. bovis BCG and further studies are needed to validate their diagnostic value. Investigations using an ultra-rapid gas chromatograph with a surface acoustic wave sensor (zNose) demonstrated presence of 2-phenylethanol (PEA) in the headspace of cultures of M. bovis BCG and Mycobacterium smegmatis, when grown on Lowenstein Jensen supplemented with glycerol. PEA is a reversible inhibitor of DNA synthesis. It is used during selective isolation of gram positive bacteria and may also be used to inhibit mycobacterial growth. PEA production was observed to be dependent on growth of mycobacteria. Further study is required to elucidate the metabolic pathways involved and assess whether this compound is produced during in vivo growth of mycobacteria.

Item Type: Journal Article
Copyright Holders: 2011 Federation of European Microbiological Societies
ISSN: 1574-6968
Project Funding Details:
Funded Project NameProject IDFunding Body
Not SetNot SetDepartment for International Development, UK (DFID)
Keywords: volatile organic compounds; tuberculosis; biomarker
Academic Unit/Department: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Life, Health and Chemical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Interdisciplinary Research Centre: Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)
Biomedical Research Network (BRN)
Item ID: 30982
Depositing User: Claire Turner
Date Deposited: 25 Jan 2012 13:15
Last Modified: 05 Oct 2016 01:26
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