Biosecurity in PRRSV control
What is a priority and what is not? It depends on the risks and the PRRSV status of the farm…
Use of processing fluids for PRRSV diagnostics
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.
Introduction of replacement gilts to PRRS-positive sow herds
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.
PRRSV surveillance on the breeding herd - is oral fluids from suckling piglets an alternative?
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...
PRRSV control using vaccination and optimized management: three case studies
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.
PRRS: Time to stability and time to baseline production study
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.
Health and economical impact of PRRS in Northern Ireland
The economic potential lost in a unit positive to PRRS could be around 35 – 37% of net unit margin.
Transdermal devices in PRRSV immunization (2/2)
Needle-free injection technology improves the dispersion of vaccines throughout the tissue.
Transdermal devices in PRRSV immunization (1/2)
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.
Assessing impact of 174 PRRSv on wean to finish pig health
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 role of gilt acclimation in the control of PRRS
The first and the most important condition at the beginning of PRRSV control program is to disrupt virus circulation in the reproductive herd.
PRRS control and eradication plans in Europe
Only a few EU countries are discussing national eradication as a possibility.
PRRSV pathology in the lungs
The tissue damage is the consequence of direct apoptosis (and necrosis) of alveolar macrophage and their neighboring cells due to the release of apoptotigenic cytokines, reactive oxygen species, and nitric oxide.
Challenges in diagnosis of PRRSV
Currently, no single RT-PCR assay could be recommended as a universal method allowing for detection of all PRRSV strains with optimal sensitivity.
Control of reproductive PRRS outbreak by type 1 PRRS vaccine
In Korea, it is common to vaccinate sows as a whole-herd mass vaccination program, where all sows are vaccinated quarterly with a type 2 PRRSV vaccine. Therefore, it is recommended to vaccinate breeding females quarterly with additional type 1 PRRSV vaccine to control type 1 PRRSV infection.
European strains of PRRSV in Korea
Type 1 PRRSV is highly prevalent in Korean swine herds and currently reproductive failure is more important consequence of infection with type 1 PRRSV, than is respiratory diseases in growing pigs.
National PRRS eradication program in Hungary
According to the present status and the experiences obtained during the previous one and a half year, Hungary will get free of PRRS by 2020.
PRRSV in Europe: where did it come from?
The great genetic diversity of East European strains has practical implications, the sensitivity of some of the diagnostic PCR methods can be compromised and the efficacy of the current PRRSV vaccines against the East European genetic variants still needs to be elucidated.
Serological diagnosis of PRRS
A definitive diagnostic evaluation of PRRS with respect to clinical disease requires that serological information be interpreted in combination with results from other virus assays.
Laboratory detection of PRRS virus
PCR is expensive relative to other diagnostic methods.It should be kept in mind that a positive result on PCR indicates the presence of viral RNA and does not necessarily indicate the presence of infectious PRRSV.
Diagnosis of PRRS
Any tentative clinical diagnosis then should be confirmed by detection of PRRSV (infectious virus, viral antigens and/or viral genomic material) in affected pigs using laboratory methods in conjunction with typical lesions.
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