Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Neighbour-joining tree based on mitochondrial genomes showing relationships among 1,070 isolates. The color strips around the periphery indicate the clade affiliation of the strains based on their nuclear genome SNPs. Nodes with local support value over 0.75 were marked with a purple dot. (For interpretation of the references to color in this figure legend, the reader is referred to the web version of this article.)
