Diagnosis

How should the quarantine, acclimation, and monitoring of replacement gilts be carried out on PRRS-positive farms?

Length of the quarantine: When we want to introduce negative replacements to a PRRS positive farm, the quarantine, or acclimation rather, must be long. "Long" meaning a period of not... read more test →

28 July, 2020
Question from Colombia
Management, Biosecurity, Diagnosis

Is it expected, for sows vaccinated with a MLV PRRS vaccine, to be all positive by ELISA test?

The answer to the question depends on whether it refers to naïve sows vaccinated against PRRS for the first time or to animals that have received multiple vaccinations with a... read more test →

17 October, 2019
Question from Portugal
Vaccination, Diagnosis

Externally purchased gilts were PCR PRRS virus positive at destination farm however previous test in the source herd were negative. Could the transport stress induce viremia in latent infection? What about the possibility of infection during transport (3 hours driving and the car was disinfected)?

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 →

2 May, 2019
Question from South Korea
Diagnosis, Management, Vaccination

How to interpret the results from PRRS serum samples where the ELISA was positive and the PCR negative?

Diagnostic tests are absolutely necessary to confirm PRRS. The most common used techniques are ELISA and PCR. PRRS Diagnostic tools The ELISA technique detects antibodies produced against the infectious agent,... read more test →

15 January, 2019
Question from Costa Rica
Diagnosis

With a laboratory diagnostic positive to PCV2 and PRRS, how can we be sure which disease causes poor growth and respiratory distress?

I would recommend to include histologic investigation of lung and lymphatic tissues in the diagnostic work up. Histologic lesions can be quite indicative of the causative agent involved in the... read more test →

6 September, 2018
Question from Macedonia
Diagnosis

What should I ask to my weaner piglet provider to monitor incoming diseases and keep the health of the farm?

Pig health status is a key point to optimize results at the growing-finishing period. It would be great if pigs arrive free from economically important diseases like: PRRS, Aujeszky Disease,... read more test →

9 March, 2018
Diagnosis, Biosecurity

How efficient is the PRRS immunochromatography test?

Immunochromatography tests can be very interesting in the diagnosis of PRRS virus infection, although they are not yet common in the main pig producing countries. They are simple and fast... read more test →

18 January, 2018
Diagnosis

If we just detect the swine antibodies to PRRSV, can we know if the pig has been infected by field virus?

The detection of PRRS antibodies in a pig indicates that the pig has been in contact with the virus. We know infected pigs can remain carriers of the PRRS virus... read more test →

19 September, 2017
Diagnosis

How many animals should be sampled to get reliable results about the presence of PRRSV in a 1200 sow herd?

The sampling strategy very much depend on the purpose of the test, the status of the herd and also what kind of analysis to be performed and of course also... read more test →

1 September, 2017
Diagnosis

Can oral fluids ELISA test give false positive PRRS results if weaned piglets are fed with whey or plasma powder?

Experiences from experimental studies and the field have shown that ELISA tests for the detection of antibodies against porcine reproductive and respiratory syndrome virus (PRRSV) in oral fluid samples can... read more test →

29 August, 2017
Diagnosis

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