Pig International - July/August 2017 - 29
PigInternational ❙ 29
Strategies to control and combat Salmonella on the farm
Breeding unit. Transmission of sow to piglet is not relevant in most herds.
It is not the primary target.
Weaning-growing. Control at early life can cut the infection cycle,
but there is the potential of reinfection later on.
Finishing. The objective of control in this stage is to deliver Salmonella-free pigs to the abattoir.
Size of the grain
Control strategies can be applied at different stages. Hygiene and biosecurity measures are of paramount
importance in all stages, while control strategies in feed or vaccination can be applied to reduce on-farm
levels. Antibiotherapy is not recommended, as it is not effective against multi-resistant Salmonella strains.
formic, butyric or a mix of acids at a concentration between 0.3 percent and 2 percent for prolonged periods
(between 6 and 12 weeks) could decrease the percentage
of pigs shedding Salmonella in feces.
■ Salmonella serotype: In contrast to vaccines, the effect
of organic acids is not serotype-dependent.
tively. Cost-benefit analysis in different commercial products
revealed interesting data. Using these products at the recommended rates, FCE was improved in pigs with the acid diet
compared to the control diet, together with a better cost of
feed per Kg of live weight gain (EUR0.89 in the control feed
and EUR0.84 in the feed supplemented with the acid).
Cost-benefit analysis of use of organic acids
Organic acids as a strategy
Despite the infection in most occasions subclinical,
there is a lower performance of infected pigs compared
to Salmonella-free pigs. In a study in grower pigs, feed
conversion efficiency (Kg/Kg) (FCE) was 1.88 and 1.66 in
Salmonella-infected and Salmonella-free animals, respec-
Organic acids are one of the strategies offered to control
and reduce Salmonella levels on the farm. The right dose and
treatment duration are essential for success, but acids need
other on-farm interventions related to hygiene, biosecurity and
management to reduce Salmonella to negligible levels. ■
Hector Argüello-Rodríguez, DVM, Ph.D., is a researcher at the Genomic and Animal Biotechnology Laboratory,
University of Córdoba, Spain. Contact e-mail: Arguello.email@example.com
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