The optimum vaccination plan for sows against Parvovirus, Erysipelas and Leptospira is during lactation, thus preventing future infections during pregnancy. Furthermore, the use of reproductive vaccines is common on most pig farms around the world dueto the high prevalence of these pathogens amongst swine herds.The humoral immune response and difference in safety between commercial reproductive vaccines has already been reported, but the impact that these could have on sow feed intake, milk production and piglet performance up to weaning is still being evaluated.
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