Relatedness of Human and Animal Clostridium difficile PCR Ribotype 078 Isolates Determined on the Basis of Multilocus Variable-Number Tandem-Repeat Analysis and Tetracycline Resistance

Author:

Bakker D.1,Corver J.1,Harmanus C.1,Goorhuis A.1,Keessen E. C.2,Fawley W. N.3,Wilcox M. H.3,Kuijper E. J.1

Affiliation:

1. Department of Medical Microbiology, Center of Infectious Diseases, Leiden University Medical Center, Leiden, Netherlands

2. Institute for Risk Assessment Sciences, Veterinary Public Health Division, University of Utrecht, Utrecht, Netherlands

3. Department of Microbiology, Leeds Teaching Hospitals and University of Leeds, Leeds, United Kingdom

Abstract

ABSTRACT Totals of 102 and 56 Clostridium difficile type 078 strains of human and porcine origins, respectively, from four European countries were investigated by an optimized multilocus variable-number tandem-repeat analysis (MLVA) and for tetracycline susceptibility. Eighty-five percent of all isolates were genetically related, irrespective of human or porcine origin. Human strains were significantly more resistant to tetracycline than porcine strains. All tetracycline-resistant strains contained the Tn 916 -like transposon harboring the tet (M) gene. We conclude that strains from human and porcine origins are genetically related, irrespective of the country of origin. This may reflect a lack of diversity and/or common source.

Publisher

American Society for Microbiology

Subject

Microbiology (medical)

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