PMID- 26813295 OWN - NLM STAT- MEDLINE DCOM- 20160921 LR - 20181202 IS - 1029-2454 (Electronic) IS - 0892-7014 (Linking) VI - 32 IP - 2 DP - 2016 TI - Discrimination of bacteriophage infected cells using locked nucleic acid fluorescent in situ hybridization (LNA-FISH). PG - 179-90 LID - 10.1080/08927014.2015.1131821 [doi] AB - Bacteriophage-host interaction studies in biofilm structures are still challenging due to the technical limitations of traditional methods. The aim of this study was to provide a direct fluorescence in situ hybridization (FISH) method based on locked nucleic acid (LNA) probes, which targets the phage replication phase, allowing the study of population dynamics during infection. Bacteriophages specific for two biofilm-forming bacteria, Pseudomonas aeruginosa and Acinetobacter, were selected. Four LNA probes were designed and optimized for phage-specific detection and for bacterial counterstaining. To validate the method, LNA-FISH counts were compared with the traditional plaque forming unit (PFU) technique. To visualize the progression of phage infection within a biofilm, colony-biofilms were formed and infected with bacteriophages. A good correlation (r = 0.707) was observed between LNA-FISH and PFU techniques. In biofilm structures, LNA-FISH provided a good discrimination of the infected cells and also allowed the assessment of the spatial distribution of infected and non-infected populations. FAU - Vilas Boas, Diana AU - Vilas Boas D AD - b Laboratory for Process, Environment, Biotechnology and Energy Engineering (LEPABE), Department of Chemical Engineering, Faculty of Engineering , University of Porto , Porto , Portugal. FAU - Almeida, Carina AU - Almeida C AD - a LIBRO -Laboratorio de Investigacao em Biofilmes Rosario Oliveira , Centre of Biological Engineering, University of Minho , Braga , Portugal. AD - b Laboratory for Process, Environment, Biotechnology and Energy Engineering (LEPABE), Department of Chemical Engineering, Faculty of Engineering , University of Porto , Porto , Portugal. FAU - Sillankorva, Sanna AU - Sillankorva S AD - a LIBRO -Laboratorio de Investigacao em Biofilmes Rosario Oliveira , Centre of Biological Engineering, University of Minho , Braga , Portugal. FAU - Nicolau, Ana AU - Nicolau A AD - b Laboratory for Process, Environment, Biotechnology and Energy Engineering (LEPABE), Department of Chemical Engineering, Faculty of Engineering , University of Porto , Porto , Portugal. FAU - Azeredo, Joana AU - Azeredo J AD - b Laboratory for Process, Environment, Biotechnology and Energy Engineering (LEPABE), Department of Chemical Engineering, Faculty of Engineering , University of Porto , Porto , Portugal. FAU - Azevedo, Nuno F AU - Azevedo NF AD - b Laboratory for Process, Environment, Biotechnology and Energy Engineering (LEPABE), Department of Chemical Engineering, Faculty of Engineering , University of Porto , Porto , Portugal. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - England TA - Biofouling JT - Biofouling JID - 9200331 RN - 0 (Oligonucleotides) RN - 0 (locked nucleic acid) SB - IM EIN - Biofouling. 2016;32(2):ii. PMID: 26901589 MH - Acinetobacter baumannii/*virology MH - Bacteriophages/*physiology MH - Biofilms/*growth & development MH - In Situ Hybridization, Fluorescence/*methods MH - Oligonucleotides/metabolism MH - Pseudomonas aeruginosa/*virology MH - Reproducibility of Results OTO - NOTNLM OT - Acinetobacter OT - Pseudomonas aeruginosa OT - bacteriophage OT - biofilms OT - phage infection, LNA-FISH EDAT- 2016/01/28 06:00 MHDA- 2016/09/23 06:00 CRDT- 2016/01/28 06:00 PHST- 2016/01/28 06:00 [entrez] PHST- 2016/01/28 06:00 [pubmed] PHST- 2016/09/23 06:00 [medline] AID - 10.1080/08927014.2015.1131821 [doi] PST - ppublish SO - Biofouling. 2016;32(2):179-90. doi: 10.1080/08927014.2015.1131821.