Attenuated PRRS vaccines (Modified Live Vaccines) are not designed to pass immunity to the piglets, although they will. How do naïve animals response to PRRS vaccines? PRRS live attenuated... read more test →
This is quite a difficult question to answer, as it depends of a wide range of factors, such as: Herd structure, herd size, herd organization, PRRS virus gilt acclimation strategies... read more test →
Could abortion or stillborn happen in sows less than three weeks before farrowing if they are given a PRRSv MLV vaccine? And what can be the consequences of vaccinating for... read more test →
The inoculation of PRRS live virus from the farm as a method to acclimatise the gilts has been used extensively with positive results provided that: It can be done on... read more test →
To answer this question, the first thing to be considered, it´s that it is not possible to differentiate, by a serum antibody test, an animal infected with PRRSv from a... read more test →
To control an unstable PRRS situation, a farm did more than 4 times a PRRS mass vaccination with 2 different commercial NA type MLV (one commercial vaccine in one week,... read more test →
The PCR technique is usually very sensitive and it detects very small amounts of PRRS virus in blood or other samples, but there are some limitations to the interpretation of... read more test →
As many other infectious agents, PRRS virus will benefit when stressors are affecting the pigs as their immune capacity will be reduced, thus helping the virus to infect. PRRS... read more test →
This is a very good question and the frustrating answer is: you cannot know for sure if animals are protected against PRRSv or not. There are no so called “correlates... read more test →
A PRRSv-positive farm has a serious neonatal diarrhoea problem in piglets born from primiparous. Diarrhoea appears in the third day of life, although in some cases it is visible from... read more test →
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