An official website of the United States government
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
LockA locked padlock
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Image Number D1184-1
Listeria monocytogenes on this broccoli sprout shows up as green fluorescence. The bacteria are mainly associated with the root hairs.
Photo by Lisa Gorski.
640 pixels wide: (d1184-1.jpg)