Figure 3From: Immune protection of chickens conferred by a vaccine consisting of attenuated strains of Salmonella Enteritidis, Typhimurium and Infantis Shedding of the vaccine strains by chickens as determined by cloacal swabbing. The chickens were vaccinated on day 1, revaccinated on day 21 of life and Salmonella presence in cloacal swabs was detected until four consecutive negative tests were recorded.Back to article page