US EPA

1038864 

Journal Article 

Production of volatile organic compounds by mycobacteria 

Mcnerney, R; Mallard, K; Okolo, PI; Turner, C 

2012 

Yes 

FEMS Microbiology Letters
ISSN: 0378-1097
EISSN: 1574-6968 

Wiley-Blackwell, 111 River Street Hoboken NJ 07030-5774 United States 

328 

2 

150-156 

English 

22224870 

10.1111/j.1574-6968.2011.02493.x 

WOS:000300666600010 

https://www.scopus.com/inward/record.uri?eid=2-s2.0-84857236713&doi=10.1111%2fj.1574-6968.2011.02493.x&partnerID=40&md5=83fd2b104c1f7618ada5f3ef07ef262c
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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 the 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. 

volatile organic compound; tuberculosis; biomarker