Title : Ceftazidime/avibactam resistance associated with L169P mutation in the omega loop of KPC-2.

Pub. Date : 2019 May 1

PMID : 30753572






5 Functional Relationships(s)
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1 The KPC-2 gene was cloned from the ceftazidime/avibactam-resistant isolate and evaluated for susceptibility to ceftazidime/avibactam, in an Escherichia coli background. Ceftazidime KPC-2 Escherichia coli
2 The KPC-2 gene was cloned from the ceftazidime/avibactam-resistant isolate and evaluated for susceptibility to ceftazidime/avibactam, in an Escherichia coli background. Ceftazidime KPC-2 Escherichia coli
3 RESULTS: A single L169P mutation was identified in the KPC-2 gene between the ceftazidime/avibactam-resistant and -susceptible isolates. Ceftazidime KPC-2 Escherichia coli
4 The novel KPC-2 allele, designated KPC-35, was shown to confer reduced susceptibility to ceftazidime/avibactam and increased susceptibility to carbapenems, as compared with KPC-2. Ceftazidime KPC-2 Escherichia coli
5 CONCLUSIONS: A novel L169P mutation was identified in KPC-2 and was shown through cloning experiments to confer reduced susceptibility to ceftazidime/avibactam. Ceftazidime KPC-2 Escherichia coli