Abstract
In several tetracycline-resistant (Tetr) Clostridium difficile strains, homology with the Tn916 part of plasmid pAM120 DNA was observed. This 15-kilobase transposon, carrying a Tetr determinant, was originally found in Streptococcus (Enterococcus) faecalis. Hybridization experiments revealed that at least six of seven HincII fragments of Tn916, representing greater than 95% of its length, showed homology with DNA of Tetr C. difficile strains. Therefore, a close relationship of the C. difficile Tetr-determining element with the entire Tn916 transposon can be assumed, although differences were observed concerning the number of HindIII cleavage sites within the transposon. In addition to strong hybridization of Tetr determinants of C. difficile with Tn916, weak signals were detected when DNA of Tets C. difficile was hybridized with Tn916. These weak signals could be attributed to a single internal HincII fragment of Tn916.
MeSH Terms
Clostridium/drug effects,genetics
DNA Restriction Enzymes
DNA Transposable Elements
DNA, Bacterial/analysis
Deoxyribonuclease EcoRI
Deoxyribonuclease HindIII
Deoxyribonucleases, Type II Site-Specific
Drug Resistance, Microbial/genetics
Electrophoresis, Agar Gel
Enterococcus faecalis/genetics
Nucleic Acid Hybridization
R Factors
Sequence Homology, Nucleic Acid
Tetracycline/pharmacology
Chemicals
DNA Transposable Elements
DNA, Bacterial
DNA Restriction Enzymes
Deoxyribonuclease EcoRI
Deoxyribonuclease HindIII
Deoxyribonucleases, Type II Site-Specific
GTYRAC-specific type II deoxyribonucleases
Tetracycline
Authors & Affiliations
3 authors, click to expand affiliations / ORCID
Hächler H
Department of Medical Microbiology, University of Zurich, Switzerland.
Kayser F H
Berger-Bächi B
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