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publicado em 24/04/2013 às 11h05:00
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Studies with live birds again showed that the influenza virus genes is a combination of several viruses, such as H9N2

 
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Scientists have found that the H7N9 flu virus in humans has a similar gene sequence to that of H7N9 found in live poultry, the China Academy of Agricultural Sciences (CAAS) said Tuesday.

Studies were carried out by CAAS Haerbin Veterinary Research Institute and found that the H7N9 flu virus is a combination of genes from various viruses, a CAAS statement said.

In the H7N9 flu virus, six of its inner genes are from the H9N2 bird flu virus, but origins of both its hemagglutinin (HA) gene and neuraminidase (NA) gene are not clear, the statement said.

Chen Hualan and Li Chengjun, researchers with the institute, headed the study.

They collected 970 samples from live poultry markets and farms in Shanghai and Anhui. Twenty of the samples from the markets were positive and all samples from poultry farms were negative.

Further work should be carried out to detect H7N9 bird flu virus to explore its sources and transmission channels, Chen said.

The research was published in the latest English version of Chinese Science Bulletin, which is sponsored by Chinese Academy of Sciences and National Natural Science Foundation of China.

New cases

During the 24-hour period ending at 4 p.m. on Tuesday, China confirmed four new cases of human H7N9 avian influenza, including two in Zhejiang, one in Anhui and the first case in Shandong.

The National Health and Family Planning Commission said in its daily update on H7N9 cases that a total of 108 H7N9 cases have been reported in China, including 22 that have ended in death.

Of the total, 14 H7N9 patients have been discharged from hospitals after receiving treatment, and the other 72 patients are being treated in designated hospitals, according to the commission.

A total of 33 cases, including 12 that have ended in death, have been reported in Shanghai. Twenty-four cases, including three deaths, have been reported in Jiangsu Province, and 42 cases, including six deaths, in Zhejiang Province. Anhui Province has reported four cases, with one ending in death. Beijing has reported one case and three have been reported in Henan Province, with one in Shandong.

China officially confirmed the human cases infected with the H7N9 virus late last month.

According to the commission, China's confirmed H7N9 cases are isolated and there has been no sign of human-to-human transmission.

Source: Isaude.net
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