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Stable Isotopes to Trace Migratory Birds and to Identify Harmful Diseases
Highly pathogenic avian infuenza (HPAI) caused by the H5N1 virus is a dangerous
transboundary animal disease (TAD) that seriously impacts on poultry production,
especially on smallholder farmers and commercial enterprises in Member States
(MS) in Asia and Africa. With the added danger that this disease can become
zoonotic, i.e. it has the potential to transfer to humans, it is essential that every effort
is made to understand its epidemiology, particularly those factors that determine the
dissemination of the virus across countries and continents. One area in which there
is an urgent need for clarity is the role that migratory wild birds might play in the
spread of HPAI to domestic poultry. This is a matter of international importance
since millions of wild birds fy from areas where HPAI is endemic to all corners of
the globe, potentially spreading the disease wherever they land.
MS are acutely aware of the need to develop technologies that allow disease
detection before clinical signs of infection became apparent. Under the aegis of the
project “Reducing risk from transboundary animal diseases (TADs) and those of
zoonotic importance”, the IAEA, through the Animal Production and Health Section
of the Joint FAO/IAEA Division, has supported MS in acquiring sensitive, specifc
and rapid nuclear, nuclear-related and nuclear-associated diagnostic tests for
HPAI. Now that MS laboratories have the required technologies to develop appropriate surveillance strategies, it will be possible to enlarge the scope of studies on
HPAI to include verifcation of the role of the wild bird hosts. Consequently, the
Animal Production and Health Section (APHS) has initiated a new Coordinated
Research Project (CRP) that uses innovative technologies to sample wild birds and
their habitats to detect virus and also introduce stable isotope analysis (SIA) of bird
tissues to determine their place of origin
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