Analysis of Toxigenic Corynebacterium ulcerans Strains Revealing Potential for False-Negative Real-Time PCR Results

Author:

Cassiday Pamela K.1,Pawloski Lucia C.1,Tiwari Tejpratap2,Sanden Gary N.1,Wilkins Patricia P.1

Affiliation:

1. National Center for Infectious Diseases

2. National Immunization Program, Centers for Disease Control and Prevention, Atlanta, Georgia

Abstract

ABSTRACT Diphtheria surveillance depends on the rapid and reliable recognition of the toxin gene in Corynebacterium diphtheriae . Real-time PCR is a rapid tool to confirm the presence of the diphtheria toxin gene ( tox ) in an isolate or specimen. We report that some toxigenic Corynebacterium ulcerans strains show atypical results in a real-time PCR for tox .

Publisher

American Society for Microbiology

Subject

Microbiology (medical)

Reference21 articles.

1. Centers for Disease Control and Prevention. 1997. Respiratory diphtheria caused by Corynebacterium ulcerans—Terre Haute, Indiana, 1996. MMWR Morb. Mortal. Wkly. Rep.46:330-332.

2. Characterization of Toxigenic Corynebacterium ulcerans Strains Isolated from Humans and Domestic Cats in the United Kingdom

3. Comparison of Phenotypic and Genotypic Methods for Detection of Diphtheria Toxin among Isolates of Pathogenic Corynebacteria

4. Efstratiou, A., and R. C. George. 1999. Laboratory guidelines for the diagnosis of infections caused by Corynebacterium diphtheriae and C. ulcerans. Commun. Dis. Public Health2:250-257.

5. A modified Elek test for detection of toxigenic corynebacteria in the diagnostic laboratory

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