* Porcine reproductive and respiratory syndrome virus, genotype 1

** Cell culture infectious dose 50%

For active immunisation of clinically healthy pigs from 1 day of age in a porcine reproductive and respiratory syndrome (PRRS) virus contaminated environment, to reduce viraemia and nasal shedding caused by infection with European strains of PRRS virus (genotype 1).

Onset of immunity: 21 days after vaccination.

Duration of immunity: 26 weeks after vaccination.

In addition, intramuscular vaccination of seronegative 1-day-old piglets was demonstrated to reduce lung lesions against challenge administered at 26 weeks post vaccination. Intramuscular vaccination of seronegative 2-week-old piglets was demonstrated to reduce lung lesions and oral shedding against challenge administered at 28 days and at 16 weeks post-vaccination.

Additionally, nasal vaccination of seronegative 3-day-old piglets reduced viraemia, nasal shedding and lung lesions against challenge administered at 21 days post-vaccination. Nasal vaccination of seropositive 3-day-old piglets reduced viraemia, nasal shedding and lung lesions against challenge administered 10 weeks post-vaccination.

In addition, pre-pregnancy vaccination of clinically healthy gilts and sows, non-PRRS virus-naïve (i.e. either previously immunised against PRRS virus via vaccination or exposed to PRRS virus via field infection) or PRRS virus-naïve, was demonstrated to reduce the transplacental infection caused by PRRS virus during the last third of pregnancy, and to reduce the associated negative impact on reproductive performance (reduction of the occurrence of stillbirths, of piglet viraemia at birth and at weaning, of lung lesions and of viral load in lungs in piglets at weaning).

Method of administration:

Immunisation must be carried out by intramuscular or nasal administration.

Reconstitute the lyophilisate with the supplied solvent. In cases where the vials containing the solvent and the lyophilisate are stored separately, verify prior to reconstituting the lyophilisate that the lot number mentioned on the vial containing the solvent is identical to the lot number mentioned on the vial containing the lyophilisate. Transfer approximately 5 ml of solvent to the vial containing the lyophilisate and ensure complete reconstitution. Transfer the reconstituted solution back into the solvent vial (containing the remaining solvent): 25 doses are reconstituted into 50 ml solvent, 50 doses are reconstituted into 100 ml solvent, and 125 doses are reconstituted into 250 ml solvent.

Intramuscular injection: 2 ml in the neck.

Nasal administration: 2 ml administered as 1 ml in each nostril.

Pigs for fattening from 1 day of age onwards: A single dose of 2 ml is given to pigs via intramuscular injection.

Pigs for fattening from 3 days of age onwards: A single dose of 2 ml is given to pigs via intramuscular administration, or a single dose of 2 ml is given to pigs via nasal route of administering 1 ml in each nostril using a sterile syringe not connected to a needle.

Gilts and sows: A single dose of 2 ml is given intramuscularly prior to introduction into the sow herd, approximately 4 weeks prior to breeding.

A single booster dose is given every 6 months.

Use sterile syringes and needles.

The use of a multi-dosing syringe is recommended. Use vaccination devices according to the manufacturer’s instructions. Needles for administration should be appropriate for the size of the pig.

Do not use in herds where European PRRS virus has not been detected by reliable diagnostic methods.

Do not use in boars producing semen, as PRRS virus can be shed in semen.

Do not use in PRRS virus-naïve pregnant gilts and sows in the second half of gestation because the vaccine strain may cross the placenta. The administration of the vaccine to pregnant PRRS virus-naïve gilts and sows in the second half of gestation may have an impact on their reproductive performance.

Vaccinate healthy animals only.

Do not vaccinate pigs younger than 3 days by nasal route since the concurrent intake of colostrum may interfere with the efficacy of the vaccine.

Vaccination should aim to achieve a homogenous immunity in the target population at farm level.

Care should be taken to avoid the introduction of the vaccine strain into an area where PRRS virus is not already present.

Animals vaccinated via intramuscular route may excrete the vaccine strain for more than 16 weeks following vaccination. Animals vaccinated via nasal route may exrete the vaccine strain for more than 10 weeks. The vaccine strain can spread to in contact pigs. The most common spreading route is via direct contact but spreading via contaminated objects or an airbourne spread cannot be excluded.

Special precautions should be taken to avoid spreading of the vaccine strain to unvaccinated animals (e.g. PRRS virus-naïve pregnant gilts and sows in the second half of gestation) that should remain free from PRRS virus.

PRRS virus-naïve breeding animals (e.g. replacement gilts from PRRS virus-negative herds) which are introduced into a PRRSV-infected herd should be vaccinated prior to first insemination.

Vaccination should preferably be done in a separated quarantine unit. A transition period should be respected between vaccination and moving the animals to the breeding unit. The transition period should be longer than the shedding phase of the PRRS MLV vaccine following vaccination.

In order to limit the potential risk of recombination between PRRS MLV vaccine strains of the same genotype do not use different PRRS MLV vaccines on the same farm at the same time. In the case of transitioning from one PRRS MLV vaccine to another PRRS MLV vaccine, a transition period should be respected between the last administration of the current vaccine and the first administration of the new vaccine. This transition period should be longer than the shedding period of the current vaccine following vaccination. Do not routinely rotate two or more commercial PRRS MLV vaccines based on different strains in a herd.

Pregnancy:

Can be used in PRRS virus-naïve gilts and sows pre-breeding or in the first half of gestation.

Can be used in non-PRRS virus-naïve gilts and sows in the second half of gestation.

Lactation:

The safety of the vaccine has not been established during lactation.

No information is available on the safety and efficacy of this vaccine when used with any other veterinary medicinal product. A decision to use this vaccine before or after any other veterinary medicinal product therefore needs to be made on a case by case basis.

Do not mix with any other veterinary medicinal product.

A transient increase in rectal temperature (0.5°C on average, and up to 1.4°C individually) may very commonly occur within 4 days after vaccination. Local reactions in the form of swellings are common and resolve spontaneously within 3 days. The area of local tissue reaction is in general below 2 cm in diameter. Anaphylactic-type reactions (vomiting, tremors and/or mild depression) may uncommonly occur in piglets shortly after vaccination. These resolve without treatment within few hours.

A minor and transient increase in rectal temperature (0.2°C on average, and up to 1.0°C individually) may very commonly occur 4 hours post vaccination in pre-breeding PRRS virus-naïve gilts and sows. Local reactions in the form of swellings are very common and resolve spontaneously within 5 days. The area of local tissue reaction is in general below 0.5 cm in diameter.

A minor and transient increase in rectal temperature (0.8°C on average, and up to 1.0°C individually) may very commonly occur 4 hours post vaccination in PRRS virus-naïve gilts and sows in the first half of gestation. Local reactions in the form of swellings are very common and resolve spontaneously within 9 days. The area of local tissue reaction is in general below 1.4 cm in diameter.

A minor and transient increase in rectal temperature (0.4°C on average, and up to 0.6°C individually) may very commonly occur 4 hours post vaccination in non-PRRS virus-naïve gilts and sows in the second half of gestation. Local reactions in the form of swellings are very common and resolve spontaneously within 32 days. The area of local tissue reaction is in general below 5 cm in diameter.

The frequency of adverse reactions is defined using the following convention:

Upon administration of a 10-fold overdose in piglets, anaphylactic-type reactions (tremor, apathy and/or vomiting) were very commonly observed shortly after vaccination; these signs resolved without treatment within a few hours. A transient increase in rectal temperature (0.3°C on average, and up to 1.2°C individually) very commonly occurred 24 hours post vaccination. Local reactions, in the form of soft/hard swelling (below or equal to 0.7 cm diameter) without heat or pain, were very commonly observed at the injection site and resolved within 5 days.

The administration of a 10-fold overdose to PRRS virus-naïve pre-breeding or pregnant gilts and sows in the first or second half of pregnancy induced similar adverse reactions as those described above under adverse reactions. The maximum size of the local reactions was bigger (2 cm) and the maximum duration was in general longer (up to 9 days in pre-breeding sows).

After the administration of a 10-fold overdose to non-PRRS virus-naïve gilts and sows in the second half of pregnancy, a transient increase in rectal temperature (0.3°C on average, and up to 0.6°C individually) occurred 4 hours post vaccination. A local reaction involving transiently the whole neck region was very commonly observed (red-purple dark, erythematous swelling, causing itching, vesicle formation, increased local temperature, and, occasionally, pain). The reaction evolved to form hard tissue and formation of a scab, which very commonly lasted up to more than 44 days.

Zero days.

Store and transport refrigerated (2°C - 8°C).

The solvent may be stored outside a refrigerator at 15°C - 25°C.

Do not freeze. Protect from light.

Shelf-life of the veterinary medicinal product as packaged for sale: 2 years.

Shelf-life after first opening: use immediately.

Keep out of the sight and reach of children.

For animal treatment only.

Cardboard box containing 1 vial of 15 ml (25 doses) and 1 vial of 50 ml of solvent.

Cardboard box containing 1 vial of 15 ml (50 doses) and 1 vial of 100 ml of solvent.

Cardboard box containing 1 vial of 15 ml (125 doses) and 1 vial of 250 ml of solvent.

Not all pack sizes may be marketed.

Not applicable.

Any unused veterinary medicinal product or waste materials derived from such veterinary medicinal products should be disposed of in accordance with local requirements.

UK(GB): Vm 42058/5075

UK(NI): EU/2/17/215/001-003