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 (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
 Image Number K8277-5 |
In tests at the Beltsville laboratory, a vaccine injection is used to immunize chicks against coccidia with recombinant DNA containing two promising proteins from the outside coat of oocysts, the protozoa's infectious stage.
Photo by Keith Weller.
