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CASE REPORTS
JOURNAL ARTICLE
Arrival of Klebsiella pneumoniae producing KPC carbapenemase in the United Kingdom.
Journal of Antimicrobial Chemotherapy 2008 December
BACKGROUND: KPC-type carbapenemases are increasingly prevalent in parts of the USA and Israel and are an emerging concern in South America, Europe and China. We investigated the UK's first two KPC-producing Klebsiella pneumoniae isolates.
METHODS: The isolates were referred to the UK's national reference laboratory for confirmation of carbapenem resistance. Susceptibilities were determined by agar dilution, and bla(KPC) and Tn4401-like elements were sought by PCR and sequencing. Isolates were compared by PFGE of XbaI- and SpeI-digested genomic DNA.
RESULTS: The isolates were from patients in different UK hospitals, with no epidemiological connection. Both were resistant to carbapenems (MICs > 16 mg/L), with imipenem MICs unchanged by EDTA, and also to all other beta-lactams (including inhibitor combinations), tobramycin, amikacin and ciprofloxacin. They were susceptible to gentamicin (MICs
CONCLUSIONS: The first KPC-3-producing K. pneumoniae isolates detected in the UK were highly genetically related to a KPC-3-producing Israeli K. pneumoniae strain. This relatedness was consistent with the history of one UK patient, who had been hospitalized previously in Israel. However, this strain may be circulating more widely since the second UK patient had no identifiable links with Israel or other overseas countries.
METHODS: The isolates were referred to the UK's national reference laboratory for confirmation of carbapenem resistance. Susceptibilities were determined by agar dilution, and bla(KPC) and Tn4401-like elements were sought by PCR and sequencing. Isolates were compared by PFGE of XbaI- and SpeI-digested genomic DNA.
RESULTS: The isolates were from patients in different UK hospitals, with no epidemiological connection. Both were resistant to carbapenems (MICs > 16 mg/L), with imipenem MICs unchanged by EDTA, and also to all other beta-lactams (including inhibitor combinations), tobramycin, amikacin and ciprofloxacin. They were susceptible to gentamicin (MICs
CONCLUSIONS: The first KPC-3-producing K. pneumoniae isolates detected in the UK were highly genetically related to a KPC-3-producing Israeli K. pneumoniae strain. This relatedness was consistent with the history of one UK patient, who had been hospitalized previously in Israel. However, this strain may be circulating more widely since the second UK patient had no identifiable links with Israel or other overseas countries.
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