Dissemination of CTX-M-type extended-spectrum β-lactamase genes to unusual hosts

Claudia Mugnaioli, Francesco Luzzaro, Filomena De Luca, Gioconda Brigante, Gianfranco Amicosante, Gian Maria Rossolini

Research output: Contribution to journalArticlepeer-review


A Citrobacter amalonaticus and a Morganella morganii producing the CTX-M-1 extended-spectrum β-lactamase (ESBL) were isolated from an area where this enzyme is now widespread in Escherichia coli. This is the first report of CTX-M-1 in the former species. In both cases the ESBL determinant was possibly acquired by these unusual hosts in vivo, after coinfection with E. coli strains carrying conjugative plasmids encoding CTX-M-1.

Original languageEnglish
Pages (from-to)4183-4185
Number of pages3
JournalJournal of Clinical Microbiology
Issue number8
Publication statusPublished - Aug 2005

ASJC Scopus subject areas

  • Microbiology
  • Microbiology (medical)


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