Fig. 4From: Shedding of Salmonella Typhimurium in vaccinated and unvaccinated hens during early lay in field conditions: a randomised controlled triala Prevalence of Salmonella spp. in dust samples collected at various sampling points during early lay. b Prevalence of Salmonella Typhimurium in dust samples at various sampling points during early lay. At each sampling point, dust swabs (n = 5 each from vaccinated and unvaccinated groups) were collected from Farm A and B during early lay. Binomial Exact 95% confidence intervals are reportedBack to article page