The high genetic diversity of the virus is not only complicating laboratory tests but also the estimation of the level of protection of pigs against PRRSV.
An example on how technology can be implemented in a farm for evaluation of biosecurity compliance using production parameters.
Do outbreaks in the same farm have a similar time-to-stability? What factors can affect time-to-stability?
71% of the farms reporting a PRRS break today will report a break within the following two years. What makes them more susceptible?
PCR can detect the virus in virtually any material but, does it mean the sample contains the virus and it is infectious? Is any PCR test valid for any strain?
How can we monitor our program? Which pigs should be sampled? How many? How often should we sequence the virus/es present in our farms?
Four veterinarians talk about gilt acclimation: programs they put in place, how the immune status is measured and special management scenarios for introducing those gilts into the main herd.
What is the preferred exposure method?, and the best status of the incoming gilts?, should they be raised on-farm or purchased?, … Veterinary practitioners from Germany, North America, China, and Spain share their opinions.
Key swine veterinary practitioners describe the “PRRS-ception” of this disease in the most important pork producing regions.
It is very important to analyze new PRRSV sequences against a broad reference set representing the farm, the system and the region, as well as the sequences of available commercial vaccines (this will make it possible to differentiate between field and vaccine strains).
Dr. Robert Morrison created the Swine Health Monitoring Project in 2011 and, after his tragic loss, in May 2017 the program was renamed.
What is a priority and what is not? It depends on the risks and the PRRSV status of the farm…
We propose to use the processing fluids, the liquid accumulated at the bottom of the pail when farmers collect tails and testicles during routine procedures as a sample.
A study was performed including 69 PRRS-positive sow herds with the aim of comparing the use of PRRSV MLV and quarantine facilities with the PRRSV status of replacement gilts at first insemination.
Oral fluids are practical, fast, easy, cost-effective and reliable methods for sampling pig populations, but it has not been easy or practical to obtain such samples from suckling piglets...
Although the use of vaccination was effective in stabilizing the sows, the results of these case studies emphasized that elimination of PRRSV from the nursery can only be accomplished if vaccination and partial depopulation/ disinfection are supported by strict implementation of all recommended management procedures, including AI/AO.
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.