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Transmission networks among 22 patients with outbreak-associated blaOXA-181 sequence type 307 (A) and blaNDM-1 sequence type 152 (B) clones of Klebsiella pneumoniae isolated from a neonatal unit during outbreak, South Africa, October 2019–February 2020. Question marks denote missing isolates; numbers along branches indicate number of single-nucleotide polymorphisms between index isolate and other isolates.
