Figure 1.

Unrooted maximum likelihood core genome tree of meticillin-resistant Staphylococcus aureus ST22, Gaza, 2009 (n = 59)

The ST22 Gaza population was compared with 175 isolates representative of the global ST22 population [6], based on 6,944 SNPs. The ST22 population was further divided into the ST22-A population, the majority of which were of healthcare origin, and the non-ST22-A population, the majority of which were of community origin. Branches are coloured according to their geographical origin.

^aEMRSA-15 strain from UK sequenced in our laboratory.

^bST22 isolate from the Israeli city of Bat Yam.