Open AccessRapid molecular identification of Neisseria meningitidis isolates using the polymerase chain reaction followed by single‐stranded conformation polymorphism analysis
Author(s) -
Kesanopoulos Konstantinos,
Tzanakaki Georgina,
Velegraki Aristea,
Tegos Nikolaos,
Caugant Dominique A.,
Menounos Panagiotis,
KoureaKremastinou Jenny,
LevidiotouStefanou Stamatina
Publication year - 2005
Publication title -
fems immunology & medical microbiology
Language(s) - English
Resource type - Journals
eISSN - 1574-695X
pISSN - 0928-8244
DOI - 10.1016/j.femsim.2005.03.003
Subject(s) - neisseria meningitidis , single strand conformation polymorphism , polymerase chain reaction , biology , typing , microbiology and biotechnology , neisseriaceae , virology , neisseria , genetics , gene , bacteria , antibiotics
Typing of Neisseria meningitidis strains is currently performed with conventional and molecular methods. Our objectives were: first, to develop a polymerase chain reaction (PCR) followed by single‐stranded conformation polymorphism (SSCP) analysis of the Por A gene (VR1 region) to distinguish N. meningitidis subtypes and second, to evaluate the method for the identification and characterization of N. meningitidis in patient specimens. SSCP analysis of the VR1 region of the Por A1/2 gene from 126 N. meningitidis strains and 29 clinical samples identified seven SSCP types (SP‐1 to SP‐7); four strains were not typeable by the method. Classification according to the SSCP methods and serosubtype agreed for 122 of the 126 typeable strains (96.8%). For the 24‐culture positive clinical samples, serosubtype and SSCP agreed in all cases. Five samples, which were culture‐negative but obtained from children during an apparent outbreak of meningococcal disease in a primary school, presented identical SSCP classification for each sample (SP‐2). PCR‐SSCP is a rapid and cost‐effective method for typing N. meningitidis strains that could provide important early information in the surveillance of suspected meningococcal outbreaks, particularly when culture‐negative specimens constitutes the main source of material to analyze.