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Volume 31, Number 2—February 2025
Dispatch

Diphtheria Toxin–Producing Corynebacterium ramonii in Inner-City Population, Vancouver, British Columbia, Canada, 2019–2023

Christopher F. Lowe1Comments to Author , Gordon Ritchie1, Chiara Crestani, Miguel Imperial, Nancy Matic, Michael Payne, Aleksandra Stefanovic, Diana Whellams, Sylvain Brisse2, and Marc G. Romney2
Author affiliation: Author affiliations: University of British Columbia, Vancouver, British Columbia, Canada (C.F. Lowe, G. Ritchie, M. Imperial, N. Matic, M. Payne, A. Stefanovic, D. Whellams, M.G. Romney); St. Paul’s Hospital, Vancouver (C.F. Lowe, G. Ritchie, N. Matic, M. Payne, A. Stefanovic, M.G. Romney); Institut Pasteur–Université Paris Cité, Paris, France (C. Crestani, S. Brisse); LifeLabs, Vancouver (M. Imperial, D. Whellams); Institut Pasteur National Reference Center for Corynebacteria of the Diphtheriae Complex, Paris (S. Brisse)

Main Article

Table

Antimicrobial drug susceptibility, co-isolated bacteria, and toxin test results for wound specimens containing Corynebacterium ulcerans and C. ramonii collected in Vancouver, British Columbia, Canada, 2019–2023*

Characteristics Corynebacterium ulcerans, n = 6 Corynebacterium ramonii, n = 8
Antimicrobial drug susceptibility
Penicillin NA Intermediate, n = 8
Erythromycin NA Susceptible, n = 8
Clindamycin NA Susceptible, n = 1; intermediate, n = 7
Vancomycin
 NA
 Susceptible, n = 8
Frequency of co-isolated bacteria from wound cultures
 Enterobacterales, n = 4; MSSA, n = 3; coagulase-negative staphylococci,† n = 2; β-hemolytic Streptococcus,‡ n = 2; Acinetobacter baumannii, n = 1
 β-hemolytic Streptococcus,§ n = 6; Arcanobacterium hemolyticum, n = 4; MSSA, n = 4; Enterobacterales, n = 3; yeast, n = 1; Pasteurella multocida, n = 1
Toxin testing, no. (%) isolates
Nontoxigenic 4 (66.6) 4 (50.0)
Nontoxigenic, tox gene–bearing 0 1 (12.5)
Toxigenic 2 (33.3) 3 (37.5)

*Bacteria were isolated from wounds on lower extremities of patients. MSSA, methicillin-susceptible Staphylococcus aureus; NA, not applicable. †Staphylococcus pseudintermedius, S. lugdunensis. ‡Streptococcus dysgalactiae and group G Streptococcus. §Streptococcus pyogenes, S. dysgalactiae subspecies equisimilis.

Main Article

1These first authors contributed equally to this article.

2These senior authors contributed equally to this article.

Page created: December 30, 2024
Page updated: January 31, 2025
Page reviewed: January 31, 2025
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