Vaccination – PRRSControl

Can PRRSV1 Modified-Live vaccines be effective against PRRSV2?

PRRSControl — Fri, 23 Jan 2026 13:10:57 +0000

Field data from South Korea show that a PRRSV1 modified-live vaccine can reduce piglet mortality and provide cross-protection in herds where PRRSV2 is circulating.

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Early piglet vaccination with UNISTRAIN® PRRS induces similar neutralizing titres than 3-week-old vaccination

PRRSControl — Wed, 16 Jul 2025 08:08:16 +0000

Laia Aguirre and colleagues¹ assessed the levels of Neutralizing Antibodies (NA) induced by two different PRRS1 Modified Live Vaccines (MLVs) when administered at 3 days of age, compared to vaccination at 3 weeks of age.

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Pigs vaccinated with a PRRSV1 MLV developed potent immunity against Japanese PRRSV2 strains

PRRSControl — Wed, 05 Mar 2025 17:15:13 +0000

Recently, Salvador Romero and colleagues, assessed the NA and CMI conferred UNISTRAIN® PRRS (PRRSV1 MLV, HIPRA) against the infection by PRRSV2 Japanese strains.

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Vaccination of piglets with PRRSV-MLV promotes long-term reduction of mortality in nursery

PRRSControl — Mon, 20 Jan 2025 09:03:25 +0000

In some regions, colder and wetter months are often perceived as associated with an increased severity of PRRS (Porcine Reproductive and Respiratory Syndrome) outbreaks in pig farms. As a result, certain farms adopt a seasonal vaccination approach, vaccinating piglets against PRRS only during these colder periods. While this strategy may appear cost-effective due to reduced vaccine and labour expenses, it risks undermining the goal of long-term stability within the farm.

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Enhanced productivity and antibiotic reduction in pigs vaccinated intradermally with a PRRSV1 MLV on a Japanese PRRSV2-positive farm

PRRSControl — Mon, 04 Nov 2024 11:29:13 +0000

Vaccines can reduce the clinical outcome and productive impact of Porcine Reproductive and Respiratory Syndrome Virus (PRRSV), with two routes of administration available: intramuscular (IM) and intradermal (ID). Our goal was to evaluate the efficacy of two commercial PRRS MLV vaccines - one based on PRRSV1 (UNISTRAIN® PRRS, HIPRA; IM and ID), and another on PRRSV2 (strain VR-2332; IM) - in growing pigs on a Japanese PRRSV2-positive farm.

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The impact of PRRSV vaccination over a highly pathogenic strain: the case of Rosalia

PRRSControl — Wed, 09 Oct 2024 06:54:57 +0000

The emergence of the Rosalia strain has posed a critical question: how effective are current vaccines in controlling outbreaks caused by this highly pathogenic variant?

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Evaluation of PRRS piglet vaccination in a multi-origin nursery unit in Spain

PRRSControl — Tue, 25 Jun 2024 13:48:12 +0000

In this study, the efficacy of piglet vaccination was assessed in a multi-origin nursery unit in the southeast of Spain.

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How to manage the vaccination against PRRSV in farms positive to highly pathogenic strains?

Enric Marco — Thu, 25 Apr 2024 07:29:51 +0000

In Spain we are having many problems with highly pathogenic PRRSV1 strains, and the vaccines do not seem to work at all. Would it be recommended to stop vaccinating sows and piglets in these cases?

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Vaccination of piglets against PRRS: why, when, and how

PRRSControl — Wed, 29 Nov 2023 10:23:30 +0000

Control of the disease caused by the PRRS virus remains a source of frustration for all producers and veterinarians. And no wonder! The reasons why controlling the disease is so complex include the need for a multifactorial approach and the fact that no solution alone is exclusive and effective.

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Early vaccination of piglets: how to use diagnostic tools for monitoring?

Daniel Linhares — Mon, 17 Jul 2023 08:10:13 +0000

When we have an early vaccination of piglets in the herd (about 10 days of age) for PRRS and we want to check the piglets at weaning, after about 10 days, how can we assess the risk of management errors or infections during the farrowing period, starting with the negativity of the piglets through blood samples at 3 days of age?

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