Multiple Nucleotide Substitutions in the Neisseria meningitidis Serogroup C ctrA Gene Cause False-Negative Detection by Real-Time PCR

Abstract
Two strains of Neisseria meningitidis serogroup C with disparate sequences of ctrA were isolated. The nucleotide substitutions did not alter the corresponding protein sequences, but they impeded the detection of these meningococcal isolates by real-time PCR.