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 Fighting a destructive crop disease with mathematics
21.06.2017 | University of Cambridge

nachricht Unusual soybean coloration sheds a light on gene silencing
20.06.2017 | University of Illinois College of Agricultural, Consumer and Environmental Sciences

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: Can we see monkeys from space? Emerging technologies to map biodiversity

An international team of scientists has proposed a new multi-disciplinary approach in which an array of new technologies will allow us to map biodiversity and the risks that wildlife is facing at the scale of whole landscapes. The findings are published in Nature Ecology and Evolution. This international research is led by the Kunming Institute of Zoology from China, University of East Anglia, University of Leicester and the Leibniz Institute for Zoo and Wildlife Research.

Using a combination of satellite and ground data, the team proposes that it is now possible to map biodiversity with an accuracy that has not been previously...

Im Focus: Climate satellite: Tracking methane with robust laser technology

Heatwaves in the Arctic, longer periods of vegetation in Europe, severe floods in West Africa – starting in 2021, scientists want to explore the emissions of the greenhouse gas methane with the German-French satellite MERLIN. This is made possible by a new robust laser system of the Fraunhofer Institute for Laser Technology ILT in Aachen, which achieves unprecedented measurement accuracy.

Methane is primarily the result of the decomposition of organic matter. The gas has a 25 times greater warming potential than carbon dioxide, but is not as...

Im Focus: How protons move through a fuel cell

Hydrogen is regarded as the energy source of the future: It is produced with solar power and can be used to generate heat and electricity in fuel cells. Empa researchers have now succeeded in decoding the movement of hydrogen ions in crystals – a key step towards more efficient energy conversion in the hydrogen industry of tomorrow.

As charge carriers, electrons and ions play the leading role in electrochemical energy storage devices and converters such as batteries and fuel cells. Proton...

Im Focus: A unique data centre for cosmological simulations

Scientists from the Excellence Cluster Universe at the Ludwig-Maximilians-Universität Munich have establised "Cosmowebportal", a unique data centre for cosmological simulations located at the Leibniz Supercomputing Centre (LRZ) of the Bavarian Academy of Sciences. The complete results of a series of large hydrodynamical cosmological simulations are available, with data volumes typically exceeding several hundred terabytes. Scientists worldwide can interactively explore these complex simulations via a web interface and directly access the results.

With current telescopes, scientists can observe our Universe’s galaxies and galaxy clusters and their distribution along an invisible cosmic web. From the...

Im Focus: Scientists develop molecular thermometer for contactless measurement using infrared light

Temperature measurements possible even on the smallest scale / Molecular ruby for use in material sciences, biology, and medicine

Chemists at Johannes Gutenberg University Mainz (JGU) in cooperation with researchers of the German Federal Institute for Materials Research and Testing (BAM)...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Plants are networkers

19.06.2017 | Event News

Digital Survival Training for Executives

13.06.2017 | Event News

Global Learning Council Summit 2017

13.06.2017 | Event News

 
Latest News

Quantum thermometer or optical refrigerator?

23.06.2017 | Physics and Astronomy

A 100-year-old physics problem has been solved at EPFL

23.06.2017 | Physics and Astronomy

Equipping form with function

23.06.2017 | Information Technology

VideoLinks
B2B-VideoLinks
More VideoLinks >>>