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Nobilis Influenza H5N2 (inactivated whole avian influenza virus...) - QI01AA23

Updated on site: 09-Feb-2018

Medication name: Nobilis Influenza H5N2
Substance: inactivated whole avian influenza virus antigen of H5N2 subtype (strain A/duck/Potsdam/1402/86)
Manufacturer: Intervet International BV


EPAR summary for the public

This document is a summary of the European Public Assessment Report. Its purpose is to explain how the assessment done by the Committee for Medicinal Products for Veterinary Use (CVMP) on the basis of the documentation provided, led to the recommendations on the conditions of use.

If you need more information about how this product may be used, you should consult your national veterinary authority. If you want more information on the basis of the CVMP recommendations, read the Scientific Discussion (also part of the EPAR).

What is Nobilis Influenza H5N2?

Nobilis Influenza H5N2 is a vaccine containing an inactivated avian influenza virus H5N2 (inactivated means that the virus has been killed so that it cannot cause the disease any more).

What is Nobilis Influenza H5N2 used for?

Nobilis Influenza H5N2 is a vaccine used in chickens to protect against avian influenza. The vaccine reduces the signs of flu and the excretion (shedding) of the virus by the infected birds. The vaccine is injected intramuscularly (into a muscle) or subcutaneously (under the skin).

The vaccine will only be used as part of an approved national disease control programme. This is because control of avian influenza is the responsibility of national veterinary authorities in consultation with the European Commission.

How does Nobilis Influenza H5N2 work?

Nobilis Influenza H5N2 is a vaccine. When it is given to chickens, the birds’ immune system (their natural defence mechanism) learns how to make antibodies (a special type of protein) to fight the disease. In the future, if the birds are exposed to the avian flu virus, the immune system will be able to make those antibodies quicker and this will help them fight the disease.

The virus used for the vaccine carries the H5 (haemagglutinin 5) and N2 (neuramidase 2) antigens. This means that vaccinated birds make antibodies against these two antigens. This strain has been chosen because it protects birds against virulent H5N1 field strains (cross-protection), while allowing differentiation of vaccinated from infected birds. Vaccinated birds can be differentiated from infected birds by a diagnostic test for antibodies against the N2 component. This differentiation is important for disease surveillance and control.

How has Nobilis Influenza H5N2 been studied?

The company carried out laboratory safety studies using a vaccine very similar to Nobilis Influenza H5N2. This vaccine has some of the same ingredients but different antigens (viruses), two of which are produced using the same process to that used for the avian influenza antigen of Nobilis Influenza. They also tested the safety of three standard production batches of Nobilis Influenza H5N2.

Studies were carried out in one-day-old and 2 to 4 week-old chickens free of any infection. The data on the effectiveness of the vaccine was based on published scientific papers and internal company reports. They included studies in other avian species (ducks, turkeys, pheasants), and studies using either the subcutaneous or intramuscular routes.

The vaccine was assessed in the context of an emergency situation which means that further studies with Nobilis H5N2 are still ongoing and will be assessed.

What benefit has Nobilis Influenza H5N2 shown during the studies?

The results of the safety studies indicated that the product is safe for chickens. When compared, the subcutaneous and intramuscular routes were shown to produce the same responses.

The vaccine has been shown to prevent clinical signs and mortality and reduce virus shedding in infected chickens.

The vaccine is able to induce antibodies in a wide range of birds.

If the circulating avian influenza field virus has a different N component to the N2 included in the vaccine, it may be possible to differentiate between vaccinated from infected birds by using a diagnostic test to detect Neuraminidase antibodies.

What is the risk associated with Nobilis Influenza H5N2?

In common with many adjuvanted vaccines swelling may occur at the vaccination site which may last for about 14 days.

What are the precautions for the person who gives the medicine or comes into contact with the animal?

The vaccine contains a mineral oil. The person who gives the vaccine should be careful to avoid accidental self injection.

What is the time to allow before the animal can be slaughtered and the meat used for human consumption (withdrawal period)?

Zero days

The vaccine does not contain any ingredients that are likely to pose a risk for consumers of vaccinated birds.

Why has Nobilis Influenza H5N2 been approved?

The Committee for Medicinal Products for Veterinary use concluded that the vaccine has been shown to be effective in preventing clinical disease in poultry and could be a useful tool in controlling an outbreak of avian influenza infection. Because of the current epidemiological situation of avian influenza and the consequent threat to both human and animal health the committee recommended the granting of a Marketing Authorisation. The benefit-risk balance may be found in module 6 of this EPAR.

EMEA 2006

Nobilis Influenza H5N2 has been authorised under “Exceptional Circumstances”. This means that it has yet not been possible to obtain complete information about the product. The European Medicines Agency (EMEA) will review additional information that will become available according to an agreed timetable and this summary will be updated as necessary.

Other information about Nobilis Influenza H5N2:

The European Commission granted a marketing authorisation valid throughout the European Union, for Nobilis Influenza H5N2 to Intervet International BV on 01/09/2006.

This summary was last updated on 05/09/2006.

EMEA 2006