Use of a live attenuated Salmonella enterica serovar Typhimurium vaccine on farrow-to-finish pig farms

Maternal vaccination as aSalmonellaTyphimurium reduction strategy on pig farms

“…De Ridder et al . () also found that oral vaccination of piglets was associated with improved daily live‐weight gain in experimentally infected pigs and suggested that feed conversion efficiency may have been improved. It is likely that Salmonella infection depressed the appetite of the nonvaccinated study pigs, but significant improvements in growth parameters were not observed in the current study.…”

“…In this context, previous studies have demonstrated average daily gain benefits as a result of vaccination of preweaned piglets (Farzan and Friendship ; De Ridder et al . ). In contrast, Husa et al .…”

“…De Ridder et al . () observed response variability after oral vaccination of piglets with the same product on three farrow‐to‐finish pig herds. In our study, vaccination did not have a marked effect on faecal or environmental prevalence of Salmonella on two herds.…”

“…; De Ridder et al . ). When sows plus piglets were vaccinated, a consistent reduction in shedding was observed, but results were more variable and lacked statistical significance (Ruggeri et al .…”

“…Vaccination strategies that involve stimulating both passive immunity from the dam (sow vaccination) plus active immunity in offspring (piglet vaccination) appear to be most efficacious, although either approach alone can yield significant control of Salmonella (Wales and Davies 2017). Relatively few vaccination studies with Salmonella have been undertaken under field conditions on pig farms and most of these have been conducted with small numbers of animals (Schwarz et al 2011;Arguello et al 2013;De Ridder et al 2014;Ruggeri et al 2015;Davies et al 2016). Several studies have evaluated live vaccines for Salmonella Choleraesuis, a serovar that is particularly pathogenic to both pigs and some humans (Schwarz et al 2011), but is now rarely reported in Europe (EFSA 2016, Wales andDavies 2017).…”