PMID- 27889163 OWN - NLM STAT- MEDLINE DCOM- 20170306 LR - 20170828 IS - 1095-9998 (Electronic) IS - 0740-0020 (Linking) VI - 62 DP - 2017 Apr TI - Differential detection of pathogenic Yersinia spp. by fluorescence in situ hybridization. PG - 39-45 LID - S0740-0020(15)30216-1 [pii] LID - 10.1016/j.fm.2016.09.013 [doi] AB - Yersinia enterocolitica, Y. pseudotuberculosis and Y. pestis are pathogens of major medical importance, which are responsible for a considerable number of infections every year. The detection of these species still relies on cultural methods, which are slow, labour intensive and often hampered by the presence of high amounts of accompanying flora. In this study, fluorescence in situ hybridization (FISH) was used to develop a fast, sensitive and reliable alternative to detect viable bacteria in food. For this purpose, highly specific probes targeting the 16S and 23S ribosomal RNA were employed to differentially detect each of the three species. In order to enable the differentiation of single nucleotide polymorphisms (SNPs), suitable competitor oligonucleotides and locked nucleic acids (LNAs) were used. Starved cells still showed a strong signal and a direct viable count (DVC) approach combined with FISH optimized live/dead discrimination. Sensitivity of the FISH test was high and even a single cell per gram of spiked minced pork meat could be detected within a day, demonstrating the applicability to identify foodborne hazards at an early stage. In conclusion, the established FISH tests proved to be promising tools to compensate existing drawbacks of the conventional cultural detection of these important zoonotic agents. CI - Copyright A(c) 2016 Elsevier Ltd. All rights reserved. FAU - Rohde, Alexander AU - Rohde A AD - German Federal Institute for Risk Assessment, Diedersdorfer Weg 1, 12277 Berlin, Germany; Free University Berlin, Department of Biology, Chemistry and Pharmacy, Takustr. 3, 14195 Berlin, Germany. Electronic address: alexander.rohde@bfr.bund.de. FAU - Hammerl, Jens Andre AU - Hammerl JA AD - German Federal Institute for Risk Assessment, Diedersdorfer Weg 1, 12277 Berlin, Germany. FAU - Appel, Bernd AU - Appel B AD - German Federal Institute for Risk Assessment, Diedersdorfer Weg 1, 12277 Berlin, Germany. FAU - Dieckmann, Ralf AU - Dieckmann R AD - German Federal Institute for Risk Assessment, Diedersdorfer Weg 1, 12277 Berlin, Germany. FAU - Al Dahouk, Sascha AU - Al Dahouk S AD - German Federal Institute for Risk Assessment, Diedersdorfer Weg 1, 12277 Berlin, Germany. LA - eng PT - Journal Article DEP - 20160921 PL - England TA - Food Microbiol JT - Food microbiology JID - 8601127 RN - 0 (RNA Probes) RN - 0 (RNA, Ribosomal, 16S) RN - 0 (RNA, Ribosomal, 23S) SB - IM MH - Bacteria/genetics MH - Bacterial Load MH - Food Microbiology MH - Food Safety/*methods MH - In Situ Hybridization, Fluorescence MH - Polymorphism, Single Nucleotide/immunology MH - RNA Probes MH - RNA, Ribosomal, 16S MH - RNA, Ribosomal, 23S MH - Red Meat/microbiology MH - Sensitivity and Specificity MH - Yersinia enterocolitica/genetics/*isolation & purification MH - Yersinia pestis/genetics/*isolation & purification MH - Yersinia pseudotuberculosis/genetics/*isolation & purification OTO - NOTNLM OT - Direct viable count OT - FISH OT - Food safety OT - Yersinia EDAT- 2016/11/28 06:00 MHDA- 2017/03/07 06:00 CRDT- 2016/11/28 06:00 PHST- 2015/12/14 00:00 [received] PHST- 2016/09/16 00:00 [revised] PHST- 2016/09/18 00:00 [accepted] PHST- 2016/11/28 06:00 [entrez] PHST- 2016/11/28 06:00 [pubmed] PHST- 2017/03/07 06:00 [medline] AID - S0740-0020(15)30216-1 [pii] AID - 10.1016/j.fm.2016.09.013 [doi] PST - ppublish SO - Food Microbiol. 2017 Apr;62:39-45. doi: 10.1016/j.fm.2016.09.013. Epub 2016 Sep 21.