The purpose of this study was to compare efficacy of LCE (load-close-expose) using attenuated PRRSV to that using live-virus exposure on breeding herds acutely infected with PRRSv.
The economic potential lost in a unit positive to PRRS could be around 35 – 37% of net unit margin.
Needle-free injection technology improves the dispersion of vaccines throughout the tissue.
NFID administered swine vaccines can use half to a tenth of the dose required for intramuscular vaccines because of the higher antigen dispersion and contact with the antigen presenting cells found in skin.
A method to quantify the relative economic importance of pig health status at placement by specific pathogens (PRRSv and PEDv) and to estimate the effect of a specific type of PRRSv at a specific production system is presented.
The first and the most important condition at the beginning of PRRSV control program is to disrupt virus circulation in the reproductive herd.