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.
Salmonella load in dust samples enriched or not by incubation in BPW with DNA extraction by a commercial kit or a simple sample boiling method. Dust samples were collected at the indicated time points from experimental flock challenged with a field isolate of S. Typhimurium DT 135 using a seeder bird technique at 1 day of age and vaccinated with a non-propagative strain of live Salmonella vaccine at 10 and 16 weeks of age.
