An official website of the United States government
The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before
sharing sensitive information, make sure you’re on a federal
government site.
The site is secure.
The https:// ensures that you are connecting to the
official website and that any information you provide is encrypted
and transmitted securely.
Thwaite JE, Baillie LW, Carter NM, Stephenson K, Rees M, Harwood CR, Emmerson PT.Thwaite JE, et al. Among authors: harwood cr.Appl Environ Microbiol. 2002 Jan;68(1):227-34. doi: 10.1128/AEM.68.1.227-234.2002.Appl Environ Microbiol. 2002.PMID: 11772631Free PMC article.