Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Bird flu: a new sampling campaign is planned in Africa

04.09.2006
Asia, Europe, Africa... The bird flu epidemic has not needed a passport to cross borders, but has almost certainly required a vector. What sort? This is one of the questions that is still bothering researchers. Migrating wild birds have been at the heart of the debate on the matter ever since the crisis began. However, we also know that legal and illegal trade circuits play a major role in disease spread within countries.

For Emmanuel Camus, Director of CIRAD's Animal Production and Veterinary Medicine Department, "both types of vector are suspected. The balance may swing one way or the other, depending on the situation ". While legal trade circuits are more or less familiar, it will be less easy to evaluate the role of illegal circuits. As regards the role of migrating wild birds, an initial campaign of 5000 samples has been conducted by CIRAD, in conjunction with the NGO Wetlands International and the FAO, in 14 countries since January 2006.

Their analyses have not revealed any trace of the highly pathogenic H5N1 virus to date. However, we cannot state with any certainty that wild birds are not responsible, since we do not yet have certain data. Conversely, the analyses did reveal the existence of other less pathogenic avian viruses, and provided further information about the ecology of the bird flu virus in the tropics.

A new sampling campaign is scheduled in Africa as of September 2006, at more sites. Moreover, research recently showed that while bird flu viruses are generally found in the cloaca, H5N1 concentration is even higher in the respiratory tract of infected birds. In the next campaign, samples will thus also be taken from the larynx of each bird.

This new sampling operation will be facilitated by better local infrastructures: Africa will shortly have some ten laboratories capable of diagnosing the disease, compared to just one at the end of 2005. Moreover, the CIRAD "Control of Emerging and Exotic Animal Diseases" Research Unit's analysis laboratory in Montpellier should have automatic equipment by the autumn, enabling it to handle up to 400 samples a day and provide more rapid diagnoses.

Over and above the existence of the virus within flocks, researchers also need to understand intracontinental bird movements in particular. In effect, in addition to migration patterns, which have been known for some time, there are also bird movements within Africa, particularly from West to East and South to North, that may play a significant role in spreading the disease. To determine that role, CIRAD is planning to work with Wetlands International and the Wildlife Conservation Society to capture birds early this coming winter and fit them with very lightweight satellite transmitters so as to monitor their movements.

Helen Burford | alfa
Further information:
http://www.cirad.fr/en/actualite/communique.php?id=488

More articles from Agricultural and Forestry Science:

nachricht How much drought can a forest take?
20.01.2017 | University of California - Davis

nachricht Plasma-zapping process could yield trans fat-free soybean oil product
02.12.2016 | Purdue University

All articles from Agricultural and Forestry Science >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Quantum optical sensor for the first time tested in space – with a laser system from Berlin

For the first time ever, a cloud of ultra-cold atoms has been successfully created in space on board of a sounding rocket. The MAIUS mission demonstrates that quantum optical sensors can be operated even in harsh environments like space – a prerequi-site for finding answers to the most challenging questions of fundamental physics and an important innovation driver for everyday applications.

According to Albert Einstein's Equivalence Principle, all bodies are accelerated at the same rate by the Earth's gravity, regardless of their properties. This...

Im Focus: Traffic jam in empty space

New success for Konstanz physicists in studying the quantum vacuum

An important step towards a completely new experimental access to quantum physics has been made at University of Konstanz. The team of scientists headed by...

Im Focus: How gut bacteria can make us ill

HZI researchers decipher infection mechanisms of Yersinia and immune responses of the host

Yersiniae cause severe intestinal infections. Studies using Yersinia pseudotuberculosis as a model organism aim to elucidate the infection mechanisms of these...

Im Focus: Interfacial Superconductivity: Magnetic and superconducting order revealed simultaneously

Researchers from the University of Hamburg in Germany, in collaboration with colleagues from the University of Aarhus in Denmark, have synthesized a new superconducting material by growing a few layers of an antiferromagnetic transition-metal chalcogenide on a bismuth-based topological insulator, both being non-superconducting materials.

While superconductivity and magnetism are generally believed to be mutually exclusive, surprisingly, in this new material, superconducting correlations...

Im Focus: Studying fundamental particles in materials

Laser-driving of semimetals allows creating novel quasiparticle states within condensed matter systems and switching between different states on ultrafast time scales

Studying properties of fundamental particles in condensed matter systems is a promising approach to quantum field theory. Quasiparticles offer the opportunity...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Sustainable Water use in Agriculture in Eastern Europe and Central Asia

19.01.2017 | Event News

12V, 48V, high-voltage – trends in E/E automotive architecture

10.01.2017 | Event News

2nd Conference on Non-Textual Information on 10 and 11 May 2017 in Hannover

09.01.2017 | Event News

 
Latest News

Tracking movement of immune cells identifies key first steps in inflammatory arthritis

23.01.2017 | Health and Medicine

Electrocatalysis can advance green transition

23.01.2017 | Physics and Astronomy

New technology for mass-production of complex molded composite components

23.01.2017 | Process Engineering

VideoLinks
B2B-VideoLinks
More VideoLinks >>>