| Title: | Screening of Microbial Volatile Organic Compounds for Detection of Disease in Cattle: Development of Lab-scale Method |
| Author(s): | Maurer DL; Ellis CK; Thacker TC; Rice S; Koziel JA; Nol P; VerCauteren KC; |
| Address: | "Iowa State University, Dept. of Agricultural & Biosystems Engineering, Ames, IA, 50011, USA. USDA-APHIS-WS-National Wildlife Research Center, Fort Collins, CO, 80521, USA. USDA-ARS, National Animal Disease Center, Mycobacterial Diseases, Ames, IA, 50010, USA. Iowa State University, Dept. of Agricultural & Biosystems Engineering, Ames, IA, 50011, USA. koziel@iastate.edu. USDA-APHIS-WS-Wildlife Livestock Disease Investigations Team, Fort Collins, CO, 80521, USA" |
| DOI: | 10.1038/s41598-019-47907-w |
| ISSN/ISBN: | 2045-2322 (Electronic) 2045-2322 (Linking) |
| Abstract: | "The primary hurdle for diagnosis of some diseases is the long incubation required to culture and confirm the presence of bacteria. The concept of using microbial VOCs as 'signature markers' could provide a faster and noninvasive diagnosis. Finding biomarkers is challenging due to the specificity required in complex matrices. The objectives of this study were to (1) build/test a lab-scale platform for screening of microbial VOCs and (2) apply it to Mycobacterium avium paratuberculosis; the vaccine strain of M. bovis Bacillus Calmette-Guerin; and M. kansasii to demonstrate detection times greater those typically required for culture. SPME-GC-MS was used for sampling, sample preparation, and analyses. For objective (1), a testing platform was built for headspace sampling of bacterial cultures grown in standard culture flasks via a biosecure closed-loop circulating airflow system. For (2), results show that the suites of VOCs produced by Mycobacteria ssp. change over time and that individual strains produce different VOCs. The developed method was successful in discriminating between strains using a pooled multi-group analysis, and in timepoint-specific multi- and pair-wise comparisons. The developed testing platform can be useful for minimally invasive and biosecure collection of biomarkers associated with human, wildlife and livestock diseases for development of diagnostic point-of-care and field surveillance" |
| Keywords: | Animals Biomarkers/blood Cattle Cattle Diseases/*blood/microbiology Gas Chromatography-Mass Spectrometry Humans Mycobacterium avium subsp.paratuberculosis/*isolation & purification/pathogenicity Paratuberculosis/*blood/microbiology Volatile Organic Compo; |
| Notes: | "MedlineMaurer, Devin L Ellis, Christine K Thacker, Tyler C Rice, Somchai Koziel, Jacek A Nol, Pauline VerCauteren, Kurt C eng Research Support, U.S. Gov't, Non-P.H.S. England 2019/08/23 Sci Rep. 2019 Aug 20; 9(1):12103. doi: 10.1038/s41598-019-47907-w" |
