title: Molecular typing of Neisseria gonorrhoeae causing repeated infections: evolution of porin during passage within a community.
abstract: Thirty-three Neisseria gonorrhoeae isolates from 15 persons infected multiple times with the same serovar were compared using por gene sequencing, opa-typing, and arbitrarily primed-polymerase chain reaction. All three molecular techniques were more discriminatory than serotyping and identified differences between some isolates belonging to the same serovar. Although there were differences among Por sequences within some serovars, 10 of 15 subjects became reinfected with gonococci expressing identical Por proteins. Sequence analysis of por genes revealed evidence of horizontal genetic exchange and point mutations in potential surface-exposed regions during passage in the community.
authors.affiliation: Division of Infectious Diseases, Department of Medicine and Epidemiology, University of North Carolina School of Medicine, Chapel Hill, NC 27599-7030, USA. mmhobbs@med.unc.edu
authors.forename: M M
authors.initials: MM
authors.lastname: Hobbs
authors.forename: T M
authors.initials: TM
authors.lastname: Alcorn
authors.forename: R H
authors.initials: RH
authors.lastname: Davis
authors.forename: W
authors.initials: W
authors.lastname: Fischer
authors.forename: J C
authors.initials: JC
authors.lastname: Thomas
authors.forename: I
authors.initials: I
authors.lastname: Martin
authors.forename: C
authors.initials: C
authors.lastname: Ison
authors.forename: P F
authors.initials: PF
authors.lastname: Sparling
authors.forename: M S
authors.initials: MS
authors.lastname: Cohen
mesh_terms: D000595:Amino Acid Sequence; D003153:Community Health Services; D006069:Gonorrhea / Q000382:microbiology*; D006801:Humans; D008969:Molecular Sequence Data; D009344:Neisseria gonorrhoeae / Q000145:classification* / Q000235:genetics; D009657:North Carolina; D010802:Phylogeny; D016133:Polymerase Chain Reaction; D018272:Porins / Q000235:genetics*; D017386:Sequence Homology, Amino Acid; D012703:Serotyping
chemical_list: D018272:Porins