Showing posts with label bluetongue. Show all posts
Showing posts with label bluetongue. Show all posts

Wednesday, January 23, 2008

Fwd: PRO/AH> ProMED BLUETONGUE - EUROPE (02): BTV-8, VACCINATION

[1] European Commission, vaccination

[On 16 Jan 2008, the European Commission hosted in Brussels a
conference on bluetongue in Europe. More than 350 experts met to
discuss the best ways of tackling this disease, with a particular
focus on vaccination as a prevention and control measure.

Conference participants included representatives from the Commission,
Member States, 3rd countries, international organisations and
stakeholder groups. Discussions also centered on technical and
economic aspects related to carrying out vaccination against
bluetongue, including trade considerations. Following presentations
on successful vaccination experiences in Member States and 3rd
countries, there was wide consensus that a mass vaccination strategy
in the affected Member States should be facilitated and that all
available vaccines should be used. We introduce the conclusions of
the conference, as published on the website of the European
Commission. - Mod.AS]

Date: Fri 18 Jan 2008
Source: Web-site European Commission [edited]
< http://ec.europa.eu/food/animal/diseases/controlmeasures/conclusions_bt_conf.pdf>


Conclusions: Conference on "Vaccination strategy against bluetongue",
Brussels, 16 Jan 2008
- -----------------------------------------------------

1. General
- - The Commission's political line, with regards to bluetongue has
been outlined today and is now clear: mass vaccination with all
available vaccines.
- - Estimating the actual losses due to bluetongue is difficult, but
the figures already provided suggest that they are substantial.
- - We now realise and acknowledge the very valuable expertise
gathered in the southern Member States previously affected by
bluetongue, and especially as regards the successful use of
vaccination using the 2 different types of vaccines.
- - It is clear that the use of both types of vaccines is better than
developing the disease.
- - We need to strike a balance between harmonisation and flexibility.
- - The OIE Code confirms that vaccination is the best solution for safe trade.
- - Solid and accurate standards for trade are provided in the OIE
Code but efforts should still be made as regards the OIE Manual.
- - Some stakeholders have suggested that the authorities should
consider the possibility that farmers administer the vaccine.
- - The local epidemiological situation largely influences the choice
of the most adequate type of vaccine and vaccination strategy.
- - It would be hard to justify adopting the same approach in
controlling the disease in 2008 as in 2007, given that vaccines
against BTV-1 and BTV-8 are now available.

2. The Disease and Its Control
- - We have gained a lot of expertise and knowledge of the disease in
recent years.
- - A particular European characteristic is the unprecedented waves of
bluetongue epidemics affecting in some cases high production areas.
- - We have learned that emergency mass vaccination is the most
efficient strategy, taking into account the current EU situation.
- - In principle, there is no scientific, economic or management
justification to exclude the use of any of the existing vaccines for
emergency vaccination.
- - This should be done within the existing EU legal framework for
bluetongue control and eradication, as is the case for any other
former list A diseases of the OIE.

3. The Vaccine
- - Sufficient and timely availability of vaccines for rapid
vaccination remains a concern. Vaccine supplies can now be ensured
taking into account all types of vaccines.
- - Control and direct supervision of the official veterinary services
should ensure correct vaccine administration.
- - Adequate surveillance and control mechanisms should be put in place.

4. Financial Aspects
- - The Community's co-financing for 2008 is covered in the framework
of emergency veterinary measures at the rate of 100 percent of the
costs of the purchase of the vaccine and 50 percent of the costs of
the administration, subject to certain ceilings.
- - The rest of the involved parties, and especially the Competent
Authorities of Member States, should immediately deploy the necessary
resources, including human resources.

5. Next Steps
- - Vaccination plans fulfilling all the necessary requirements should
be swiftly submitted by Member States.
- - The follow-up and evaluation of the results of this emergency
vaccination approach will be carried out in 2009.

- --
Communicated by:
ProMED-mail
<promed@promedmail.org >

************************************************************
[2] Questions and answers
Date: 18 Jan 2008
Source: Web-site European Commission [edited]
< http://ec.europa.eu/food/animal/diseases/controlmeasures/bt_qanda_en.pdf>


January 2008: Questions and Answers on bluetongue vaccination
- -------------------------------------------------------------
1. What is bluetongue?
Bluetongue is a non-contagious, insect-transmitted, viral disease of
domestic and wild ruminants. At present 24 serotypes of the virus are
recognised. The virulence and mortality rate of the different virus
strains vary considerably depending also on the infected species.

2. What are the advantages of vaccinating against bluetongue?
Vaccination is regarded as one of the most effective ways of
controlling and eventually eradicating bluetongue disease in affected
areas. It reduces clinical signs in affected animals resulting in
lower mortality and reduced economical losses, and it prevents the
spread of the disease amongst livestock.

3. What are the different vaccine options?
Vaccines against bluetongue can either be inactivated vaccines or
modified live virus (MLV) vaccines. Inactivated vaccines, when
administered in 2 separate doses, are able to fully protect animals
for a long period. Modified live vaccines generate protective
immunity after a single inoculation, and they have been proven
effective in preventing clinical BT in the areas where they are used.

4. Can Member States use vaccination against bluetongue?
Under EU legislation, Member States can apply vaccination as a
control measure against bluetongue. Member States that wish to carry
out a bluetongue vaccination campaign must inform the Commission.

5. What measures are set out for bluetongue vaccination in EU legislation?
In October 2007, Regulation (EC) No. 1266/2007 was adopted, setting
out more harmonised measures for the monitoring and control of
bluetongue. Under this Regulation, clear conditions are set out for
the movement of animals from bluetongue infected areas, including
those which have been vaccinated against the disease. The Regulation
clarifies the requirements for vaccinated animals and therefore makes
intra-community trade of vaccinated animals more feasible. Animals
vaccinated against bluetongue can only be moved if they meet certain
conditions established in Annex III of Regulation (EC) No. 1266/2007.
These conditions ensure that vaccinated animals are not viraemic
(i.e., that there is no virus in the bloodstream) and have already
developed a sufficient immune protection before being moved outside
the protection zone.

6. Is there financial support for bluetongue vaccination?
EU co-funding may be provided to cover certain costs of vaccination,
not only in emergency situations but also for long-term surveillance
and control activities and when vaccination is used with to eradicate
bluetongue.

7. Has vaccination against bluetongue already been carried out in
the EU, and what were the results?
Bluetongue vaccination has been successfully used in a number of
European countries which have been affected by the disease. Italy,
Spain, France and Portugal have all used vaccination as a means of
controlling and eradicating outbreaks of the bluetongue virus.

8. Why has vaccination not been carried out in all affected Member
States so far?
For certain strains of the bluetongue virus, including BTV8 which has
caused the outbreaks in Northern Europe, no vaccine has been
available up to now. However, the Commission has had close contacts
with the industry on this issue, and several producers have developed
or are currently developing a vaccine which could be used against BTV8.

9. Can vaccinated animals still carry the bluetongue virus?
Vaccination does not immediately protect the animal from infection if
there is a virus circulating. When the vaccines are administered to
uninfected animals, the onset of a protection is observed only after
a certain period, depending on the biological properties of the
vaccines. For this reason, EU legislation lays down movement
restrictions and/or controls for vaccinated animals to ensure that
they do not contribute to the spread of the disease.

10. Can vaccinated animals be distinguished from naturally infected animals?
No strategy is currently available to distinguish vaccinated from
infected animals on the basis of serology. However, PCR techniques
which can distinguish vaccines from field viruses have been
established and successfully used.

11. Are meat and milk products from infected or vaccinated animals
safe to eat, and do they have to be labelled as such?
Bluetongue does not affect humans, and there is no risk of the
disease being contracted or spread through meat or milk. The
vaccination of animals against bluetongue has no impact on their
products. Therefore, there is no reason why labelling requirements
should be introduced for meat and milk from bluetongue-vaccinated animals.

12. What are the trade implications (both intra-EU and vis-a-vis 3d
countries) of vaccination?
Regulation (EC) No. 1266/2007 brings EU rules with regard to the
movement of animals vaccinated against bluetongue more into line with
those of the World Organisation for Animal Health (OIE). Both the EU
and OIE accept vaccination as an effective way of controlling
bluetongue and vaccinated animals are considered safe for trade if
certain provisions (see above) are complied with.

More information on vaccination against bluetongue can be found on
the DG Health and Consumer Protection website:
<http://ec.europa.eu/food/animal/diseases/controlmeasures/bluetongue_en.htm >.

- --
Communicated by:
ProMED-mail
<promed@promedmail.org>

*********************************************************************
[3] UK, vaccination
Date: Fri 18 Jan 2008
Source: Farmers Weekly Interactive [edited]
<ttp://www.fwi.co.uk/Articles/2008/01/18/109049/vaccination-the-only-defence-against-bluetongue-says-iah.html>


Vaccination the only defence against bluetongue, says IAH
- ---------------------------------------------------------
Bluetongue disease could have a disastrous effect on the livestock
sector in Great Britain if it re-emerges with the same virulence
witnessed in northern Europe last year [2007]. The stark message on
the threat posed by bluetongue was issued by experts from the
Institute for Animal Health at a joint NFU (National Farmers
Union)/IAH (Institute of Animal Health) conference on the disease
held on Thursday (17 Jan 2008).

The message was clear: vaccination is the only protection and unless
a minimum of 80 percent country's ruminant livestock are vaccinated
then the economic consequences would be severe.

IAH bluetongue research leader Chris Oura was unequivocal in his
message. "I want to get the message across: This is a really serious
disease. 2007 is no reflection of what might happen in 2008."

He told the 85 NFU members attending that a relatively small outbreak
in Germany during 2006, although considered bad at the time, was
trivial compared to the 300 premises a day being infected at the peak
of the 2007 outbreak.

"We were lucky in 2007 we got it late so it didn't take hold. 2008
may be very different," said Dr Oura.

Belgium
- ----------
In Belgium last year [2007] the disease led to 41.9 percent mortality
in sheep, meaning that many producers there have now withdrawn from
sheep production. And in cattle many producers reported re-absorption
of foetuses, abortion, a general decline in animal health and
sterility of sires.

As it became apparent to those producers attending that vaccination
was the only real defence against this debilitating disease and its
severe economic consequences, focus turned to what shape a
vaccination strategy might take and whether a vaccine would be
available in sufficient quantities.

The DEFRA observer present confirmed that the department is
formulating a suitable strategy in conjunction with stakeholders and
experts at the IAH, but its direction would continue to be influenced
by the emergence of new cases unturned by the department's
surveillance work and the results of any pre-movement tests performed
for producers.

Vaccination
- ----------
However, vaccination will, almost certainly, be on a voluntary,
rather than compulsory, basis and producers inside the protection
zone would be the 1st to be offered the chance to protect stock.

Then, livestock in a "buffer zone" outside the protection zone
(probably about 20km [12.4-mile] wide) would be treated next and the
buffer zone would gradually edge west until England is covered.

However, no one in attendance could estimate how long it would take
to cover England or that the minimum 80 percent coverage needed to
ensure success would be achieved. Peer pressure and the role of the
media in conveying this important message was the put forward as the
only means of encouraging participation.

- --
Communicated by:
Sabine Zentis
Castleview Pedigree English Longhorns
Gut Laach
52385 Nideggen, Germany
<CVLonghorns@aol.com >

[In the meantime, a 9th European country has reported the
identification of BTV-8, namely Spain; its official OIE notification
is being posted by ProMED-mail separately. The other affected
countries are: Belgium, Netherlands, Germany, France, Luxembourg,
Denmark, the Czech Republic and Switzerland.

Switzerland, where 12 animals have been found infected in 2007, has
also decided to apply vaccination. The details are being discussed
between the federal authorities, the kantons and the animal breeders. - Mod.AS]

PRO/AH/EDR> Bluetongue - Europe (03): BTV-8, Spain, OIE

Date: 18 Jan 2008
Source: OIE WAHID Weekly Disease Information 2008 21(3) edited.
< http://www.oie.int/wahid-prod/public.php?page=weekly_report_index&admin=0>


Bluetongue, Spain
---------------------
Information received on 17 Jan 2008 from Dr. Lucio Ignacio Carbajo Goni
Subdirector General de Sanidad Animal
Direccion General de Ganaderia
Ministerio de Agricultura, Pesca y Alimentacion
Madrid, Spain

Summary
Report type: Immediate notification
Start date: 8 Jan 2008
Date of first confirmation of the event: 10 Jan 2008
Report date: 17 Jan 2008
Date submitted to OIE: 17 Jan 2008
Reason for notification:New strain of a listed disease
Manifestation of disease:Sub-clinical infection
Causal agent: Bluetongue virus
Serotype: 8

Nature of diagnosis: Laboratory (advanced)
This event pertains to: the whole country

New outbreaks
Outbreak 1 (LA 2008/1)
Ribamontan Al Monte, Solares, CANTABRIA
Date of start of the outbreak: 8 Jan 2008
Outbreak status: Continuing (or date resolved not provided)
Epidemiological unit: Farm

Species: Cattle
Susceptible: 194
Cases: 7
Deaths: 0
Destroyed: 0
Slaughtered: 0

Affected population: cattle farm
Summary of outbreaks:Total outbreaks: 1

Species Cattle
Apparent morbidity rate: 3.61 percent
Apparent mortality rate: 0.00 percent
Apparent case fatality rate: 0.00 percent
Proportion susceptible animals lost*: 0.00 percent
* Removed from the susceptible population through death, destruction
and/or slaughter

Epidemiology: Source of the outbreak(s) or origin
of infection: Unknown or inconclusive

Laboratorio Regional de Sanidad Animal de Cantabria (Local laboratory)
Species: Cattle
Test: PCR (reaccion en cadena de la polimerasa)
Test date: 10 Jan 2008
Result: Positive

Laboratorio Central de Sanidad Animal de Algete (National laboratory)
Species: Cattle
Test: PCR en tiempo real (real time PCR - Mod.PC]
Test date: 15 Jan 2008
Result: Positive

--
Communicated by:
Sabine Zentis
<http://www.cvlonghorns.de>

[This report represents an expansion of territory for the BTV-8
serotype into Spain, which has traditionally dealt with other
Bluetongue serotypes i.e. BTV-1 and BTV-4. It will be absolutely
fascinating to see how quickly this serotype spreads. The question of
how the infection arrived in Spain is also critically awaiting an
answer as there is quite a geographic gap between it's previous
distribution in France and the northern coast of Spain where it has
been newly identified.

Whittmann, Mellor and Bayliss published an interesting paper which
used BT-1 data in 2001. It indicated that Culicoides distribution can
be best predicted by the following climatic factors: minimum of the
monthly minimum temperatures, maximum of the monthly maximum
temperatures and the number of months per year with a mean
temperature 12.5 DEG C (54.5 DEG F). A similar analysis for the
spread of BT-8 could be instructive. See
<http://www.oie.int/eng/publicat/RT/2003/WITTMANN.PDF > for the complete paper.

An EU map of BTV restriction zones, updated on 14 Jan 2008, is available at
< http://ec.europa.eu/food/animal/diseases/controlmeasures/BlueTongue_RestrictedZones_2008.jpg>.
The outbreak location can be seen in the OIE WAHID refernce given above or at
< http://encarta.msn.com/map_701511426/Cantabria.html> - Mod.PC]

PRO/AH/EDR> Bluetongue - Europe: BTV-8, vaccination, vector-free period




Date: Thu 16 Jan 2008
Source: AGD. NL [trans. from Dutch Mod.AS, edited]
< http://www.agd.nl/1044335/Nieuws/Artikel/LNV-vrijwillige-vaccinatie-blauwtong.htm>


The [Dutch] Ministry of Agriculture pleas for a voluntary vaccination
against bluetongue. This has emerged during a meeting on bluetongue
in Brussels. "The introduction of compulsory vaccination must have a
clear reasoning; its necessity should be readily explainable in order
to convince the farmers". Past experience regarding compulsory
vaccination -- as related to IBR -- was rather negative; therefore, I
support voluntary vaccination", said Peter de Leeuw, chief
veterinarian in the Ministry of Agriculture.

De Leeuw regards the eradication of bluetongue virus to be the best
solution, provided this is achievable. "To attain this goal, a common
policy of affected countries is required, with the necessary
financial support secured for several years. Currently, these
conditions are not fulfilled".

The European Commission stated during the conference that a minimum
of 80 percent of the animals susceptible to bluetongue must be
vaccinated if financial support is anticipated. "I am convinced that
we, in the Netherlands, can achieve 80 percent even on a voluntary
basis", said De Leeuw.

A main question is the necessity to include in the plan the
vaccination against bluetongue of animals which are immune, since
they have already undergone infection. France has a different view on
this issue, since they see difficulties in the registration of
animals which have been infected. France supports a total, compulsory
vaccination scheme.

[Byline: Mariska Vermaas]

--
Communicated by:
ProMED-mail <promed@promedmail.org>

*****************************************************************
Date: Wed 16 Jan 2008
Source: Reuters [edited]
<http://uk.reuters.com/article/scienceNews/idUKL1614933720080116>


EU countries should order now a new vaccine to fight a resurgence
this year [2008] of bluetongue, the virus that ravaged northern
Europe's cattle and sheep in 2007, EU Health Commissioner Markos
Kyprianou said on Wednesday [16 Jan 2008].

Speaking at a one-day conference, Kyprianou said central EU funding
would meet the costs of buying the vaccine, likely to be available by
the spring, and half the costs of administration.

Several drugs companies have been developing the vaccine for the
particular strain of bluetongue that occurred last year [2007] in
northern Europe, serotype 8, one of 24 recognised strains. Until now,
no vaccine for that strain has been available.

The companies include Pfizer Inc., Intervet, now owned by U.S.
pharmaceutical company Schering-Plough Corp and Merial Ltd, a joint
venture between Merck & Co. and Sanofi-Aventis.

"In principle, 100 percent of the costs of the purchase of the
vaccine and 50 percent of the costs of the application of the vaccine
will be covered by the Community budget," he said.

That funding would be subject to certain ceilings that would be set
once the vaccine's final cost was known, Kyprianiou said, adding that
between 150 and 200 million doses would probably be needed for an
emergency vaccination campaign during 2008.

European Commission experts have estimated the cost of one vaccine
dose at around 0.50 euro (USD 0.742). While that price will probably
be fixed, administration costs vary widely across the EU's 27
countries, mainly due to differing vets' salaries.

Spread by midges, bluetongue had previously tended to occur in more
southerly parts of the European Union until 2006, when it moved much
further north. Last year [2007] was even worse, with more than 50 000
confirmed cases in 11 countries.

Apart from Italy, Portugal and Spain, which have a history of the
disease in other serotypes, countries affected by serotype 8 in 2007
were Belgium, Britain, Denmark, France, Germany, Luxembourg, the
Netherlands and Czech Republic [Switzerland, a European non-member,
was affected as well. - Mod.AS].

"The Commission now urges the member states concerned to complete ...
the necessary tendering procedures and place actual orders for the
vaccines which are now becoming available so that they are ready to
go when the time comes," Kyprianou said.

Bluetongue does not affect humans, and there is no risk of
contracting it by consuming milk or meat from infected animals.

The disease is characterised by inflammation of the mucous membranes,
congestion, swelling and haemorrhages. Sheep, rather than cattle, are
often the worst affected animals.

Bluetongue vaccination has been successfully used in a number of EU
countries that have been affected by the disease. Italy, Spain,
France and Portugal have all used vaccination. Vaccines against
bluetongue can either be inactive vaccines or modified live virus
(MLV) vaccines.

Inactivated vaccines, administered in 2 separate doses, can fully
protect animals for a long period, while MLVs create protective
immunity after a single inoculation.

[Byline: Jeremy Smith]

--
Communicated by:
ProMED-mail Rapporteur Mary Marshall

[Information on the incidence of new BTV-8 cases in Europe since the
middle of December is rather scanty and seems to lack accuracy.
According to EU's Animal Disease Notification System (ADNS, last
updated 11 Jan 2008, see at
<http://ec.europa.eu/food/animal/diseases/adns/table_11_2008/adns_110108_en.pdf >),
a total of 3 new cases have been recorded since 1 Jan 2008, all in
France. Are these indeed new cases, within the period which is
expected to be "non-vector"?!

Since the publication of Sabine Zentis' remarks concerning the need
for experts' and researchers' contributions (see in posting
20071219.4080), the scope of (publicly available) knowledge has not
widened. Enhanced research efforts addressing the epidemiology of
BTV-8 within the European realm, in particular related to its
entomological aspects, over-wintering mechanism and genetic
susceptibility, seem to still be needed. Animal breeders in 8
European countries have been severely affected by BTV-8 since its
initial discovery (Belgium, August 2006). Animal suffering is another issue.

The 3rd disease season is expected to commence in the due spring
2008, when large populations of susceptible animals may be exposed to
BTV-8 for the 1st time, particularly in areas such as Wales and
Scotland, but also in other vast regions. Their timely vaccination is
essential.

To help close the gap between gained information and its early field
utilization, ProMED-mail has offered its services for the early
publication of preliminary results, provided they address
field-related issues and are of a problem-solving nature.

An EU map of BTV restriction zones, updated on 14 Jan 2008, is available at
< http://ec.europa.eu/food/animal/diseases/controlmeasures/BlueTongue_RestrictedZones_2008.jpg>.
- Mod.AS]