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H7N9 more lethal than SARS: medical expert

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justintime View Drop Down
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    Posted: April 26 2013 at 5:44am

Taipei, April 26 (CNA) The new H7N9 avian flu virus is more lethal than the strain of coronavirus that caused the global outbreak of severe acute respiratory syndrome in 2003, a doctor at National Taiwan University Hospital said Friday.

Citing a University of Hong Kong research report, Huang Li-min, head of the hospital's Department of Pediatric Infectious Diseases, said people infected with the H7N9 virus can get sick quickly, and the disease has a fatality rate estimated at over 10 percent.

"Such a ratio is higher than that of the SARS virus," Huang said, noting that the World Health Organization (WHO) estimated the mortality rate for SARS at about 8 percent.

According to data on the website of Taiwan's Centers for Disease Control, China had 114 confirmed H7N9 cases, with 23 deaths as of 6 p.m. Friday, which translated into a mortality rate of about 20 percent.

But the University of Hong Kong report said there are at least as many undiscovered cases as confirmed cases, putting the new bird flu strain's fatality rate at slightly higher than 10 percent.

The H7N9 strain of the flu was not known to infect people until March 31, when China reported its first cases of human infections of the virus. Before then, it was only found in birds.

The first H7N9 case reported in Taiwan involved a 53-year-old man who fell ill with symptoms of fever and fatigue on April 12, three days after returning to Taiwan from Suzhou in Jiangsu Province, one of the H7N9-affected areas in China.

Huang said the patient was transferred to National Taiwan University Hospital April 20 and has been treated in a negative pressure quarantine ward since.

The patient is being given ECMO (extracorporeal membrane oxygenation) treatment and is in "serious but stable" condition, Huang added.

Chang Shang-chun, the hospital's deputy superintendent who is also an infectious disease expert, recalled that Taiwan's first SARS patient also received treatment there.

"But while the SARS patient was in serious condition, he did not need ECMO therapy, a sign that the H7N9 virus is even more virulent," Chang said.

Keiji Fukuda, the WHO's assistant director-general for health, security and the environment, said at a news conference in Beijing recently that the H7N9 is definitely one of the most lethal viruses that have been seen so far.

Taiwan's Central Epidemic Command Center said Friday that the tracking period for suspected H7N9 cases or those potentially exposed to the virus will be extended from seven days to 10 days.

The extension is needed to more effectively detect any H7N9 infection as studies published in medical journals such as The Lancet and New England Journal of Medicine are saying the virus's incubation period could reach 10 days, longer than the originally estimated seven days, the center said.

The tracking period for those who have come into contact with Taiwan's first imported H7N9 case will also be extended to 10 days, the center said.

(By Chen Ching-fang and Sofia Wu)
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http://focustaiwan.tw/news/aall/201304260027.aspx

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