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Breath Res."],"published-print":{"date-parts":[[2020,1,1]]},"abstract":"<jats:title>Abstract<\/jats:title>\n               <jats:p>Infections by oral pathogens are one of the most common health problems worldwide. Due to the intimate connection between exhaled breath and the oral cavity, breath analysis could potentially be used to diagnose these infections. However, little is known about the volatile emissions of important oral pathogens that are connected with gingivitis and periodontitis. In this study, we have performed <jats:italic>in vitro<\/jats:italic> headspace measurements on four important oral pathogens (<jats:italic>P. gingivalis, T. forsythia, P. intermedia<\/jats:italic> and <jats:italic>P. nigrescens<\/jats:italic>) using proton transfer reaction time-of-flight mass spectrometry (PTR-TOF-MS). Some of the most abundant compounds produced by the bacteria include hydrogen sulphide, methanethiol, acetone, dimethylsulphide, isoprene, cyclopentanone and indole as tentatively assigned from the mass spectra. Several other abundant mass signals were recorded but the assignment of these is less certain. Some of the bacterial species can be separated from each other by the emitted volatile fingerprints. The results of this study can be used in potential development of a diagnostic breath test for oral infections. In addition, as several of the measured compounds are known to be toxic, the results point to an intriguing possibility of studying the connection between the bacterial virulence and the emitted volatile compounds.<\/jats:p>","DOI":"10.1088\/1752-7163\/ab5559","type":"journal-article","created":{"date-parts":[[2019,11,7]],"date-time":"2019-11-07T23:00:24Z","timestamp":1573167624000},"page":"016010","update-policy":"https:\/\/doi.org\/10.1088\/crossmark-policy","source":"Crossref","is-referenced-by-count":16,"title":["On-line profiling of volatile compounds produced in vitro by pathogenic oral bacteria"],"prefix":"10.1088","volume":"14","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2271-611X","authenticated-orcid":false,"given":"Kajsa","family":"Roslund","sequence":"first","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8414-7285","authenticated-orcid":false,"given":"Markku","family":"Lehto","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3563-1876","authenticated-orcid":false,"given":"Pirkko","family":"Pussinen","sequence":"additional","affiliation":[]},{"given":"Per-Henrik","family":"Groop","sequence":"additional","affiliation":[]},{"given":"Lauri","family":"Halonen","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0716-7132","authenticated-orcid":false,"given":"Markus","family":"Mets\u00e4l\u00e4","sequence":"additional","affiliation":[]}],"member":"266","published-online":{"date-parts":[[2019,12,16]]},"reference":[{"key":"jbrab5559bib1","doi-asserted-by":"publisher","first-page":"558","DOI":"10.1128\/JCM.41.2.558-563.2003","article-title":"Diversity of bacterial populations on the tongue dorsa of patients with halitosis and healthy patients","volume":"41","author":"Kazor","year":"2003","journal-title":"J. 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