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.
S, sensitive strain; R, multidrug strain; 4I+ L+, treated by 4I combined with light; 4I+ L-, treated by 4I not combined with light.
