Summary for the public
What is Bovilis BTV8?Bovilis BTV8 is a vaccine. It is a suspension for injection that contains an inactivated (killed) bluetongue serotype 8 virus.
What is Bovilis BTV8 used for?Bovilis BTV8 is used in cattle and sheep to protect them against bluetongue disease. Bluetongue disease is an infection that is transmitted by midges and caused by the bluetongue virus (serotype 8). The vaccine is used to prevent viraemia (the presence of viruses in the blood) in sheep and to limit viraemia in cattle.
The vaccine is given to young animals as an injection under the skin. One injection is enough to vaccinate sheep, but cattle will need a second injection approximately three weeks later. The first injection is given from one month of age in sheep and from six weeks of age in cattle.
The vaccine will only be used as part of an approved national disease control programme. This is because control of bluetongue is the responsibility of national veterinary authorities in consultation with the European Commission.
How does Bovilis BTV8 work?Bovilis BTV8 is a vaccine. Vaccines work by ‘teaching’ the immune system (the body’s natural defences) how to defend itself against a disease. Bovilis BTV8 contains a bluetongue virus that has been inactivated so that it cannot cause the disease. When it is given to cattle and sheep, the animals’ immune system recognises the virus as ‘foreign’ and produce antibodies against it. In the future, if the animals are exposed to the same type of bluetongue virus, the immune system will be able to produce antibodies more quickly. This will help to protect against the disease.
Bovilis BTV8 contains bluetongue viruses of one type (‘serotype 8’). The vaccine also contains ‘adjuvants’ (aluminium hydroxide and saponin) to stimulate a better reaction by the immune system.
How has Bovilis BTV8 been studied?The safety of the vaccine was studied in laboratory safety studies carried out with an overdose of Bovilis BTV8 in young lambs and calves and in pregnant ewes and cows respectively. Results show that the vaccine is safe for use from the minimum recommended age and in pregnant animals of both species.
The efficacy of the vaccine in cattle and sheep was studied in a number of laboratory trials using the vaccine in cattle from six weeks of age and sheep from one month of age, respectively. The main parameter for assessing the efficacy of the product was the measurement of the level of the bluetongue virus in the blood (viraemia) of animals that took part in the studies. In all studies the vaccinated cattle and sheep were compared with animals that were not immunised (controls). By means of two epidemiological models the effect of vaccination with Bovilis BTV8 on the risk of bluetongue transmission to cattle was further investigated.
The vaccine was assessed in the context of an emergency situation which means that further studies with Bovilis BTV8 are still ongoing and will be assessed.
What benefit has Bovilis BTV8 shown during the studies?The studies showed that the vaccine is safe for both sheep and cattle and that it prevents viraemia in sheep from one month of age when infected with bluetongue virus serotype 8 whereas Bovilis BTV8 reduces viraemia in cattle from six weeks of age.
Bovilis BTV8 was shown to be safe for use in pregnant ewes and cattle.
What is the risk associated with Bovilis BTV8?After vaccination, animals may have a slightly raised temperature (usually not more than 0.5°C, in individual cases up to about 2°C) for up to three days after vaccination. There can also be a temporary swelling at the injection site, lasting for up to three weeks in sheep and six weeks in cattle. Some animals may also have hypersensitivity (allergic) reactions.
What is the time to allow before the animal can be slaughtered and the meat used for human consumption (withdrawal period)?The withdrawal period for both sheep and cattle is zero days.
What is the time to allow before milk can be taken from the animal for human consumption?Milk can be taken immediately for both sheep and cattle.
Why has Bovilis BTV8 been approved?The CVMP concluded that the benefits of Bovilis BTV8 exceed the risks and recommended that Bovilis BTV8 be given a marketing authorisation. The benefit-risk balance may be found in module 6 of this EPAR.
Bovilis BTV8 has been authorised under ‘Exceptional Circumstances’. This means that it has not been possible to obtain complete information about Bovilic BTV8. Every year, the European Medicines Agency (EMA) will review additional information that will become available according to an agreed timetable and this summary will be updated as necessary.
What information is still awaited for Bovilis BTV8?Additional quality information is awaited, as well as outcome of field studies.
The company that makes Bovilis BTV8 will submit an action plan together with timelines for all of the issues that need to be resolved before the authorisation can revert to normal status. It will also supply regular updates on the use and the safety of the vaccine.
Other information about Bovilis BTV8The European Commission granted a marketing authorisation valid throughout the European Union, for Bovilis BTV8 to Intervet International BV on 06/09/2010. Information on the prescription status of this product may be found on the label/outer package.
Authorisation details
Name: Bovilis BTV8 |
EMEA Product number: EMEA/V/C/000148 |
Active substance: Inactivated bluetongue virus, serotype 8 |
INN or common name: Inactivated bluetongue virus, serotype 8 |
Species: SheepCattle |
ATCvet Code: QI04AA02/8 |
Exceptional Circumstances: There were "exceptional circumstances" concerning the approval of this medicine. This happens when the applicant can show that they are unable to provide comprehensive data on the efficacy and safety of the medicine for which authorisation is being sought, due to the rarity of the condition it is intended for, limited scientific knowledge in the area concerned, or ethical considerations involved in the collection of such data. |
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Marketing Authorisation Holder: Intervet International BV. |
Revision: 0 |
Date of issue of Market Authorisation valid throughout the European Union: 06/09/2010 |
Contact address: Intervet International BV
Wim de Körverstraat 35
5831 AN Boxmeer
Netherlands
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