Complete Genome Sequences of Mycobacterium chimaera Strains 850 and 852, Isolated from Heater-Cooler Unit Water

The whole-genome sequences of Mycobacterium chimera strains 850 and 852, which were isolated from two different water samples obtained from a heater-cooler unit at Siena Hospital (Italy), were determined by combining Nanopore and Illumina technologies. Both strain 850 and strain 852 genomes consist of a circular chromosome and five plasmids, with sizes of 6,275,686 bp and 6,453,144 bp, respectively.