title: DNA profiling of Stenotrophomonas maltophilia by PCR targeted to its species-specific repetitive palindromic sequences.
abstract: OBJECTIVE
  The aim of this study was to develop a simple protocol for a PCR-based fingerprinting of Stenotrophomonas maltophilia (SmrepPCR) that utilizes primers complementary to repetitive extragenic palindromic elements (REPs) of this micro-organism.
  
  
  RESULTS
  The relatedness of 34 isolates of environmental and clinical origin was investigated by two SmrepPCRs with two different primers, gyrB sequencing and XbaI macrorestriction followed by pulsed-field gel electrophoresis. While SmrepPCR (with primer DIR) results matched data obtained from the analysis of gyrB nucleotide sequences and identified several clonal complexes, XbaI macrorestriction showed high level of heterogeneity between isolates. The macrorestriction-based clustering of isolates did not correspond to both gyrB and DIR-SmrepPCR grouping.
  
  
  CONCLUSIONS
  Our results show that SmrepPCR-inferred relationship of isolates is in a good agreement with sequence-based methods. The combined information from all methods used suggests that rapid evolution of S. maltophilia genomes might be predominantly due to high rate of rearrangements caused by mobile genetic elements.
  
  
  CONCLUSIONS
  The presented method is an inexpensive and easy to perform alternative to genotype S. maltophilia isolates and to study their population genetics. SmrepPCR demonstrates the usefulness of species-specific repetitive elements in genomic analyses.
authors: Department of Genetics and Microbiology, Faculty of Science, Charles University, Prague, Czech Republic. nunvar@natur.cuni.cz
authors: J
authors: J
authors: Nunvar
authors: P
authors: P
authors: Drevinek
authors: I
authors: I
authors: Licha
mesh_terms: D056915:DNA Copy Number Variations; D016172:DNA Fingerprinting; D004269:DNA, Bacterial / Q000032:analysis / Q000235:genetics; D016521:Electrophoresis, Gel, Pulsed-Field; D006801:Humans; D055029:Inverted Repeat Sequences; D010802:Phylogeny; D016133:Polymerase Chain Reaction / Q000379:methods*; D013045:Species Specificity; D020615:Stenotrophomonas maltophilia / Q000235:genetics* / Q000302:isolation & purification
chemical_list: D004269:DNA, Bacterial