Gert van der Hoek
In Memoriam - Editor, Senior Moderator
China 2009 update
Date: Wed 2 Sep 2009
Source: FAOAIDEnews Animal Influenza Disease Emergency Situation
Update No 61, 31 Aug 2009 [edited]
In China, since 2004, over 100 H5N1 HPAI outbreaks have been reported
in poultry and wild birds in 23 provinces, and a total of over 35
million poultry have been culled to control the spread of the disease.
No outbreaks were reported in June 2009.
During the winter 2008-2009,
surveillance activities found 45 H5N1 HPAI positive samples of
chickens, ducks and geese at markets in the provinces of Fujian,
Chongqing, Guangdong, Guangxi, Guizhou, Henan, Hubei, Shandong and
Sichuan.
Vaccination has been an important component to control the
infection since 2004. On mainland China, vaccination coverage
officially reported is still very high in all provinces. Mean
vaccination coverage through September 2008 is reported to be higher
for most provinces than for the same period in 2007.
Additionally, all
but one province, Xinjiang, reported 80 percent vaccination coverage
or higher. Some of the current challenges are that
1) the current commercially used H5N1 inactivated vaccines do not
allow for serological distinction between vaccination and field
infection;
2) it is difficult to access poultry raised on backyard and
small-scale farms; 3) vaccination coverage in domestic waterfowl is
relatively low;
4) layer and breeder ducks in particular, since they do not display
clinical signs, are often only vaccinated when they are young, but no
booster vaccination is administered on most farms; and
5) waterfowl raised for meat consumption are usually not vaccinated
because of the age at the time of marketing (4-6 weeks).
http://www.promedmail.org/pls/otn/f..._BACK_PAGE,F2400_P1001_PUB_MAIL_ID:1000,79050
[The FAOAIDEnews issue 61 of 31 Aug 2009 (13 pages) includes
additional information, such as a comprehensive report on the Central
Asia Regional Network for the Prevention and Control of Avian
Influenza, information on other infected countries, maps and tables.
It is expected to become available soon on FAO's website at
<http://www.fao.org/eims/secretariat/empres/eims_search/simple_s_result.asp?topic_docrep=172>.
Date: Wed 2 Sep 2009
Source: FAOAIDEnews Animal Influenza Disease Emergency Situation
Update No 61, 31 Aug 2009 [edited]
In China, since 2004, over 100 H5N1 HPAI outbreaks have been reported
in poultry and wild birds in 23 provinces, and a total of over 35
million poultry have been culled to control the spread of the disease.
No outbreaks were reported in June 2009.
During the winter 2008-2009,
surveillance activities found 45 H5N1 HPAI positive samples of
chickens, ducks and geese at markets in the provinces of Fujian,
Chongqing, Guangdong, Guangxi, Guizhou, Henan, Hubei, Shandong and
Sichuan.
Vaccination has been an important component to control the
infection since 2004. On mainland China, vaccination coverage
officially reported is still very high in all provinces. Mean
vaccination coverage through September 2008 is reported to be higher
for most provinces than for the same period in 2007.
Additionally, all
but one province, Xinjiang, reported 80 percent vaccination coverage
or higher. Some of the current challenges are that
1) the current commercially used H5N1 inactivated vaccines do not
allow for serological distinction between vaccination and field
infection;
2) it is difficult to access poultry raised on backyard and
small-scale farms; 3) vaccination coverage in domestic waterfowl is
relatively low;
4) layer and breeder ducks in particular, since they do not display
clinical signs, are often only vaccinated when they are young, but no
booster vaccination is administered on most farms; and
5) waterfowl raised for meat consumption are usually not vaccinated
because of the age at the time of marketing (4-6 weeks).
http://www.promedmail.org/pls/otn/f..._BACK_PAGE,F2400_P1001_PUB_MAIL_ID:1000,79050
[The FAOAIDEnews issue 61 of 31 Aug 2009 (13 pages) includes
additional information, such as a comprehensive report on the Central
Asia Regional Network for the Prevention and Control of Avian
Influenza, information on other infected countries, maps and tables.
It is expected to become available soon on FAO's website at
<http://www.fao.org/eims/secretariat/empres/eims_search/simple_s_result.asp?topic_docrep=172>.