According to the official reports sent to the OIE by the Chinese Veterinary Authorities, poultry that have tested positive for the presence of influenza virus A(H7N9) and are also suspected of being the source of reported human cases, do not show any visible signs of disease, making it very difficult to detect this virus in poultry.??
?Based on the information currently available we are facing a rather exceptional situation, because we are dealing with an influenza virus of very low pathogenicity for poultry which has the potential to cause severe disease when it infects humans?, stated the Director General of the OIE, Dr?Bernard Vallat.?
The OIE is fully involved in the collective global effort to manage new risks presented by the influenza virus A(H7N9). Supporting this, the OIE has a Reference Laboratory for avian influenza in China (Harbin Veterinary Research Institute) which is currently conducting extensive analyses on the animal source of the virus. This laboratory is also recognised by FAO. There are an additional 15 OIE Reference Laboratories around the world which are also working on animal influenza (in poultry, pigs, horses).
Source: http://crofsblogs.typepad.com/h5n1/2013/04/oie-on-the-exceptional-nature-of-h7n9.html
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