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Bird flu may hit five Asian countries

Wednesday 18 Jun 2014 7:46 a.m.

A health worker removes a dead chicken at a wholesale poultry market in Hong Kong (Reuters)

A health worker removes a dead chicken at a wholesale poultry market in Hong Kong (Reuters)

Five Asian countries could join China as targets for the H7N9 bird flu virus that has claimed about a hundred lives since it erupted in March 2013, scientists say.

Parts of Bangladesh, India, Indonesia, the Philippines and Vietnam are at risk because, like China, they have live bird markets in densely-populated areas, the team said.

Places potentially at risk include urban centres on the coast of east and southeast China where H7N9 has not been reported; parts of the Bengal regions of Bangladesh and India; Vietnam's Red River and Mekong deltas; and isolated areas of Indonesia and the Philippines.

A map published in the journal Nature Communications, seeks to provide watchdogs with a tool to identify H7N9's possible flare points.

H7N9 is the second bird virus alongside H5N1 to have emerged in recent years through live markets, where traders and shoppers come in close contact with infected chickens and ducks.

H5N1 is far more dangerous for humans than H7N9 but its spread through birds is more easily detectable, as poultry usually show signs of being sick from it.

H7N9 can be asymptomatic in birds, meaning the animals may show no sign of illness.

"The slow geographical expansion of the reported H7N9 cases in the central and southern provinces of China indicates that despite remarkably strict control efforts, H7N9 is difficult to contain along poultry market chains," the study warned.

It "may spread beyond the distribution indicated by the human cases which have thus far been reported."

The study was led by scientists at the Free University of Brussels, the International Livestock Research Institute, Oxford University and the Chinese Centre for Disease Control and Prevention.

AFP

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