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(added on 2017/01/19)

In birds only, so far 不得鳥

© 2017 SpatioEpi.com
Data source: ProMED-mail, OIE
Map created by CUHK SpatioEpi Group

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"Highly pathogenic avian influenza viruses" spread rapidly and can cause acute and severe consequences in infected birds. The entire flock of poultry could be eliminated within 48 hours. These viruses normally do not infect human, but virulent strains may emerge in our population if there is shuffling of avian influenza genes and those in human. Within the avian influenza virus family, H5N1 and H7N9 are the most widely known ones. Scientists are closely monitoring other viruses in the same family, namely, H5N6 and H5N8. Fortunately there has not been any reported human infection with H5N8 up to this moment.

The map shows the global distribution of reported H5N8 outbreaks in birds between 2014 and 2016. In the year 2016, a total of 29 countries were affected. In the first three quarters of 2016, H5N8 was only reported in few countries including South Korea, Egypt, Taiwan and Russia. In September of the same year, a warning of potential H5N8 spread was issued by the United Nations’ Food and Agricultural Organization, following the identification of H5N8 among birds in Ubsu-Nur Lake, a common habitat of migratory birds in Russia. In the fourth quarter of 2016, the warning came true with many European countries reporting outbreaks, which tied in with the timing of birds’ migration. To prevent further spread of H5N8, culling was enforced. In France alone, over 1 million poultry birds have been culled.

Data for the map was retrieved from ProMED-mail and World Organization of Animal Health.

『高致病性禽流感病毒』能夠於鳥類之間快速傳播及引起急性和嚴重的後果。它們更可於48小時內殺滅一整群家禽。這些禽流感病毒並不常感染人類。但假若病毒與人類間常見的流感病毒發生洗牌效應,該致命病毒便可能經人傳人。除了廣泛報導過的H5N1及H7N9外,科學家亦密切留意兩種高致病性禽流感:H5N6及H5N8的傳染狀況。幸好現時並沒有發現H5N8感染人類。

地圖顯示2014年至2016年禽鳥間爆發H5N8報告情況。2016年,共有29個國家受H5N8影響。在首三季度,受影響的國家只有數個,包括南韓、埃及、台灣及俄羅斯。由於在候鳥棲身地俄羅斯烏布蘇盆地發現H5N8,聯合國糧食及農業組織於九月發布H5N8散播危機的警告,而警告最終變成事實。隨著候鳥遷徙,歐洲多國相繼於第四季出現禽鳥感染H5N8的報告。為避免病毒擴散,大量有機會受感染的禽鳥被宰殺。單在法國,便已有過百萬家禽遭銷毀。

資料源自ProMED-mail及世界動物衛生組織。