title: Application of restriction endonuclease analysis of chromosomal DNA in the study of Staphylococcus aureus colonization in continuous ambulatory peritoneal dialysis patients.
abstract: The relationship between nasal and skin colonization with Staphylococcus aureus and subsequent infection in continuous ambulatory peritoneal dialysis (CAPD) patients in Brazil has been documented by restriction endonuclease analysis of plasmid DNA. However, S. aureus strains without detectable plasmids have been identified. Using restriction endonuclease analysis of chromosomal DNA hybridized with an rRNA gene probe, we document the diversity of S. aureus strains without detectable plasmids colonizing CAPD patients. Ten paired strains without detectable plasmids from five patients were studied by restriction endonuclease analysis of chromosomal DNA and by phage typing. Five different profiles were obtained by restriction endonuclease analysis of chromosomal DNA. Although four of the ten paired isolates were nontypeable by phage typing, all were discriminated by restriction endonuclease analysis of chromosomal DNA. These results demonstrate that restriction endonuclease analysis of chromosomal DNA is a useful epidemiologic tool and complements the restriction endonuclease analysis of plasmid DNA of S. aureus by providing a means of typing strains without detectable plasmids.
authors.affiliation: Department of Pathology, University of Iowa College of Medicine, Veterans Affairs Medical Center, Iowa City.
authors.forename: A
authors.initials: A
authors.lastname: Pignatari
authors.forename: L D
authors.initials: LD
authors.lastname: Boyken
authors.forename: L A
authors.initials: LA
authors.lastname: Herwaldt
authors.forename: R
authors.initials: R
authors.lastname: Hollis
authors.forename: I
authors.initials: I
authors.lastname: Leme
authors.forename: R
authors.initials: R
authors.lastname: Sesso
authors.forename: M A
authors.initials: MA
authors.lastname: Pfaller
mesh_terms: D001434:Bacteriophage Typing; D002353:Carrier State / Q000382:microbiology*; D004269:DNA, Bacterial / Q000032:analysis*; D006801:Humans; D008712:Methicillin / Q000494:pharmacology; D010068:Oxacillin / Q000494:pharmacology; D010531:Peritoneal Dialysis, Continuous Ambulatory; D010957:Plasmids; D015347:RNA Probes; D012335:RNA, Ribosomal; D015183:Restriction Mapping; D013203:Staphylococcal Infections / Q000382:microbiology*; D013211:Staphylococcus aureus / Q000145:classification / Q000187:drug effects / Q000235:genetics*
chemical_list: D004269:DNA, Bacterial; D015347:RNA Probes; D012335:RNA, Ribosomal; D008712:Methicillin; D010068:Oxacillin