PMID- 17577055 OWN - NLM STAT- MEDLINE DCOM- 20070827 LR - 20220331 IS - 0022-2615 (Print) IS - 0022-2615 (Linking) VI - 56 IP - Pt 7 DP - 2007 Jul TI - Peptide nucleic acid fluorescence in situ hybridization for rapid detection of Klebsiella pneumoniae from positive blood cultures. PG - 914-917 LID - 10.1099/jmm.0.46829-0 [doi] AB - This study evaluated a novel peptide nucleic acid (PNA) probe targeting a region of the 23S rRNA gene of Klebsiella pneumoniae by fluorescence in situ hybridization (FISH). Analytical performance was determined using 39 reference strains and other well-characterized strains of Klebsiella spp. and Enterobacter aerogenes. The probe was found to be specific for the K. pneumoniae complex (K. pneumoniae including Klebsiella ozaenae and Klebsiella variicola). The diagnostic accuracy was evaluated with 264 blood cultures containing Gram-negative rods. Using conventional identification as the reference, performance specifications were as follows: sensitivity 98.8 %, specificity 99.5 %, positive predictive value 98.8 % and negative predictive value 99.5 %. Discrepancies were resolved by PNA FISH retest and phenotypic tests. In conclusion, the K. pneumoniae probe provided an accurate diagnosis within 3 h and may supplement other methods for direct identification of Gram-negative bacteria. FAU - Sogaard, Mette AU - Sogaard M AD - Department of Clinical Epidemiology, Aalborg Hospital, Aarhus University Hospital, Aarhus, Denmark. AD - Department of Clinical Microbiology, Aalborg Hospital, Aarhus University Hospital, Postbox 365, 9100 Aalborg, Denmark. FAU - Hansen, Dennis S AU - Hansen DS AD - Department of Clinical Microbiology, Hillerod Sygehus, Denmark. AD - The International Escherichia and Klebsiella Reference Center (WHO), Statens Serum Institut, Copenhagen, Denmark. FAU - Fiandaca, Mark J AU - Fiandaca MJ AD - AdvanDx Inc., Woburn, MA, USA. FAU - Stender, Henrik AU - Stender H AD - AdvanDx Inc., Woburn, MA, USA. FAU - Schonheyder, Henrik C AU - Schonheyder HC AD - Department of Clinical Microbiology, Aalborg Hospital, Aarhus University Hospital, Postbox 365, 9100 Aalborg, Denmark. LA - eng PT - Evaluation Study PT - Journal Article PL - England TA - J Med Microbiol JT - Journal of medical microbiology JID - 0224131 RN - 0 (Culture Media) RN - 0 (Nucleic Acid Probes) RN - 0 (Peptide Nucleic Acids) SB - IM MH - Bacteremia/microbiology MH - *Bacterial Typing Techniques MH - Bacteriological Techniques MH - Blood/*microbiology MH - Culture Media MH - Humans MH - In Situ Hybridization, Fluorescence/*methods MH - Klebsiella Infections/*microbiology MH - Klebsiella pneumoniae/classification/genetics/*isolation & purification MH - Nucleic Acid Probes/*genetics MH - Peptide Nucleic Acids/*genetics MH - Time Factors EDAT- 2007/06/20 09:00 MHDA- 2007/08/28 09:00 CRDT- 2007/06/20 09:00 PHST- 2007/06/20 09:00 [pubmed] PHST- 2007/08/28 09:00 [medline] PHST- 2007/06/20 09:00 [entrez] AID - 10.1099/jmm.0.46829-0 [doi] PST - ppublish SO - J Med Microbiol. 2007 Jul;56(Pt 7):914-917. doi: 10.1099/jmm.0.46829-0.