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        Special Topics ¯S§O¥DÃD >> Wild Birds & Avian Flu ³¥³¾»P¸V¬y·P >>  »´äÆ[³¾·|´N³Ìªñ¸V¬y·P½¯©µªº·N¨£¤Î«ØÄ³(¤@) HKBWS's View 1
        
(Message started by: HKBWS Project on Nov 5^th, 2005, 1:19pm)

Title: »´äÆ[³¾·|´N³Ìªñ¸V¬y·P½¯©µªº·N¨£¤Î«ØÄ³(¤@) HKBWS's View 1
Post by HKBWS Project on Nov 5^th, 2005, 1:19pm

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HKBWS information and comments on Avian Flu (1)
25 October 2005

Review of Avian Flu outbreaks in 2005
1. Indonesia: There were several human causalities caused by H5N1 virus for a period of about two years. There seems to be a problem with the reporting system. Farmers were reluctant to report the outbreak to the government and the international community.
2. Thailand: 1 recent H5N1 death, contracted the virus from sick chickens.
3. Vietnam: 1 recent death, contracted from dead chickens.
4. Australia: H5N1 found in Pigeon that was used for racing.
5. China: This year H5N1 has been noted in Qinghai (May), Xinjiang (June), Tibet (Early August), Anhui, Hunan and Mongolia (October).  The outbreak in Qinghai has been on breeding wild birds (Bar-headed Goose, Brown-headed Gull, Pallas¡¦s Gull and Great Cormorant). The outbreak in other sites has been on captive birds in a farm.  There was 1 death in Hunan, after eating dead chicken. H5N1 was also discovered in birds that were smuggled into Taiwan.
6. Europe: H5N1 has been detected in Romania, Turkey, Greece, and Croatia.  Again the outbreaks were on captive birds in a farm. Because of the outbreak in Europe, the panic wave sweeps across the whole world, and has be magnified to un-precedent scale.
7. Hong Kong: There was no recent outbreak. Resident and migrant wild birds show no signs of abnormal behavior related to H5N1. Earlier this year, there was 1 dead Chinese Pond Heron tested positive for H5N1. Afterwards, out of 4400 life bird samples and about 500 dead bird samples, there was not a single case tested positive. There were also no reported outbreaks of H5N1 in poultry farms. Hong Kong seems to remain at a low risk area.

Based on the outbreak sites and time, there seems to be a good evidence that the Avian Flu outbreaks in China in summer is related to outbreaks in Europe, as explained in the migratory route below. The data also indicates that H5N1 can be transmitted through wild bird trade.

Main Migratory Routes in Asia and Europe
In Asia and Europe, there were three main migratory routes.
1. The East Asia route: Starting from Australia to SE Asia, through HK, then continue north through China mainland, then to Manchuria and Mongolia, finally to Siberia.
2. The Central Asia route: Starting from India, going through or going around the Tibetan Plateau, to China Xinjiang, to Siberia.
3. The West Asia route: Starting from Africa, going through Europe or Middle East, then to Siberia.

The most extreme is two species of Falcon (Amur Falcon and Lesser Kestrel) that migrate from South Africa all the way to Manchuria and Siberia. Amur Falcon passes through HK in Autumn in small numbers for the last three years.