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Bird flu can be contained, say national officials
Time:2013-04-09 14:49:53 click:
 

Chinese officials expressed confidencecurbing the H7N9 strain of bird flu, citing how the country has built capacity to deal with epidemics since the SARS outbreak.

However, the possibility of the virus being transmitted between humans cannot be ruled out, a World Health Organization official said.


 

Michael O'Leary, the WHO's China representative, said such a possibility remains despite no oneclose contact with the first human H7N9 cases having tested positive for the strain.


 

He made the remarks at a press conference with China's National HealthFamily Planning CommissionMonday.

With three more cases reportedMonday, China has recorded 24 human cases of H7N9, seven of them fatal. 

The three cases reportedMonday wereShanghaiJiangsu province.

A 4-year-old boyShanghai whoThursday was confirmed infected with H7N9 has recovered, showing that not all human infections are critical.

"At this time, there is no evidence of sustained human-to-human transmission of the virus, but no one can predict the future," O'Leary acknowledged, since influenza viruses can mutate.

He stressed the importance of keeping close surveillance of the viral activity.

If the virus mutates to spread among humans, a pandemic could follow, epidemiologists warned.

Liang Wannian, director of the health emergency response office under the National HealthFamily Planning Commission, said, "We are closely monitoring the situationhave expanded virus trackingmore areasthe country." 

Since the SARS epidemic2003, China has set up a nationwide surveillance network comprising more than 500 hospitals400 labs.

Mandatory reporting of unexplained pneumonia cases by health authorities has helped track the H7N9 virus.

Liang indicated that the virus might spread outside ShanghaiZhejiang, JiangsuAnhui provinces.

Shu Yuelong, director of the Chinese National Influenza Center, said that H7N9, compared with the H5N1 strain of bird flu, was more likely to infect humans.

But further information about the virus - how it is transmitted, potential animal hostshow easily it can spread - remains limited, he said.

Liang is confident the virus can be contained, citing strengthened virus surveillanceenhanced medical capacityearly detectiontreatment of the disease.

He said health authorities issued a directive prohibiting hospitalsdenying or delaying treatment of patients for financial reasons.

For other parts of the world, particularly neighboring countries, O'Leary urged H7N9 testing of seriousunexplained influenza cases.

"But so far it's onlya small number of provincesChina," he said.

The virus appears to spread mainlybirds to humansa sporadic way, he said.

Feng Zijian, director of the health emergency center of the Chinese Center for Disease ControlPrevention, said avoiding contact with live poultry substantially lowered the risks of infection.

Liang said vaccination is not necessary at the moment.

But "we have initiated preparations for vaccine development", he added.

Previously, there was speculation that dead pigsthe Huangpu River might be related to the new strain of virus.

O'Leary dismissed that.

"We have not connected the pig deaths to human cases of influenza, as those pigs had tested negative for influenza viruses," he said.

But surveillance is under way.

Sirenda Vong, medical officeremerging diseases, surveillanceresponse for the WHO China Office, said that China had also been tracing the virus among mammals, particularly pigs.

The evidence so far points to poultrybirds as the main vehicle of H7N9 transmission, but other sources of infection like mammals cannot be excluded, he explained.

"The epidemic is still ongoingwe cannot exclude all the potentials of infections tofrom mammals," he said.