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  • Title: Detection of differences in the nucleotide and amino acid sequences of diphtheria toxin from Corynebacterium diphtheriae and Corynebacterium ulcerans causing extrapharyngeal infections.
    Author: Sing A, Hogardt M, Bierschenk S, Heesemann J.
    Journal: J Clin Microbiol; 2003 Oct; 41(10):4848-51. PubMed ID: 14532240.
    Abstract:
    While Corynebacterium ulcerans can mimic classical diphtheria, extrapharyngeal infections are extremely rare. Sequencing of the diphtheria toxin (DT)-encoding tox gene of two C. ulcerans isolates from extrapharyngeal infections revealed differences from C. diphtheriae DT sequences, mainly in the translocation and receptor-binding domains. C. ulcerans supernatants were much less potent than supernatant from C. diphtheriae. A C. ulcerans DT-specific PCR is described below.
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