Release date: 2017-02-21
Yesterday (February 19), the website of the China National Center for Disease Control and Prevention released a message that in January this year, the Guangdong Provincial Center for Disease Control and Prevention carried out gene sequencing analysis on two viruses isolated from human cases infected with H7N9, and found that the two viruses were found. A gene insertion mutation occurred at the position of the hemagglutinin-linked peptide, and the results of the test have been confirmed by the National Center for Influenza of the National Center for Disease Control and Prevention.
After being researched and judged by the CDC, and communicating with relevant experts in the agricultural sector, it is believed that the gene insertion mutation of H7N9 virus at the position of hemagglutinin-linked peptide indicates that the virus is mutated to a virus highly pathogenic to poultry; According to the results of viral sequence analysis, mutations in the ability of the mutant virus to enhance human infectivity, virulence and interpersonal transmission have not yet occurred.
According to the relevant person in charge of the Guangdong Provincial Center for Disease Control and Prevention, from the analysis results, the impact on the prevention and control of human infection H7N9 is not significant, but it has a greater impact on industries such as poultry breeding, transportation, sales and slaughter. Because there is no H7N9 poultry vaccine, the highly pathogenic changes in the virus may cause the birds to be affected. The person in charge also revealed that in recent days, the environmental pollution around the live poultry market in Guangdong has been found, and the positive rate of H7N9 virus has increased. This is not the case this year. The monitoring results of the high season of bird flu in winter and spring of previous years are similar.
It is reported that the two cases have a history of poultry exposure before the onset of the disease, and the phenomenon of avian death has occurred in the exposed poultry. One case has been cured and the other is still under treatment. All 105 close contacts in both cases had no medical symptoms such as fever or cough after two weeks of medical observation.
Previously, on February 14, the National Health and Family Planning Commission website published the “Overview of the National Legal Infectious Diseases in January 2017â€. The data showed that in January, the number of cases of human infection with H7N9 avian influenza was 192, and the number of deaths was 79. Compared with the December 2016 data, there were 106 cases of H7N9 avian influenza infection and 20 deaths at that time (excluding Hong Kong, Macao and Taiwan). The H7N9 epidemic increased significantly in January 2017.
To this end, the National Health and Family Planning Commission recently issued the "Notice on Strengthening the Medical Treatment of Human Infected H7N9 Avian Influenza", requesting to further improve the ability of "early detection, early reporting, early diagnosis and early treatment" and strengthen medical treatment. Reduce the mortality rate and effectively protect the health rights and interests of the people. It is necessary to move forward, shift the center of gravity, strengthen case screening and early diagnosis, implement anti-influenza virus treatment as soon as possible, and focus on treatment and reduce the mortality rate.
Source: Medical Valley
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