JOURNAL ARTICLE

A carbapenem-resistant Klebsiella pneumoniae epidemic clone in Jerusalem: sequence type 512 carrying a plasmid encoding aac(6')-Ib

Gabriela Warburg, Carlos Hidalgo-Grass, Sally R Partridge, Marcelo E Tolmasky, Violeta Temper, Allon E Moses, Colin Block, Jacob Strahilevitz
Journal of Antimicrobial Chemotherapy 2012, 67 (4): 898-901
22287232

OBJECTIVES: We characterized distinctive features of a hypertransmissible carbapenem-resistant Klebsiella pneumoniae (CRKP) clone that emerged at Hadassah Hospital, Ein-Kerem, Jerusalem, Israel, in 2006.

METHODS: Eleven CRKP isolated at Hadassah Hospital during 2005-09 were examined by antimicrobial susceptibility testing, PFGE and multilocus sequence typing (MLST). Plasmids were analysed by conjugation, restriction mapping, PCR and sequencing.

RESULTS: Divergence from the national epidemic sequence type (ST) ST258 to ST512 was observed early on. Carbapenem resistance was conferred by bla(KPC-3) carried on a plasmid apparently closely related to pKpQIL, also from Israel. This clone also carried a 15 kb plasmid, designated pAAC154, that carries a Tn1331 derivative containing the aac(6')-Ib gene. pAAC154 does not carry a bla(KPC) gene, but is similar to pS15, a plasmid from New York that carries bla(KPC-2).

CONCLUSIONS: A single CRKP clone ST512 has spread efficiently in our region. In this clone, aac(6')-Ib, common in CRKP strains, is carried on a different plasmid from bla(KPC-3).

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