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.
Observation of the three strains isolated in 2014 and 2016 (A: strain A2; B: strain B1; C: strain C), and reference strain (D: strain K96243). The scale bar represents 250 nm. The observations presented here are without trimethoprim induction, the same pictures were obtained with trimethoprim induction.
