H7N9 is a subtype of avian influenza. The outer wax of influenza virus particles is covered by two types of surface glycoproteins, one for phytohemagglutinin (i.e., H) and one for neuraminidase (i.e., N), with H subdivided into 15 subtypes, and N subdivided into nine subtypes. All human influenza viruses can cause avian influenza, but not all avian influenza viruses can cause human influenza. Of the avian influenza viruses, H5, H7, and H9 can be transmitted to humans, with H5 being highly pathogenic. According to the characteristics of influenza viruses can be divided into HxNx***135 subtypes, H7N9 subtype avian influenza virus is one of them, in the past only found in the birds, not found in human infection. The biological characteristics, pathogenicity, spread of this virus, there is no basis for analysis and judgment.
The H7N9 avian influenza is a new type of avian influenza, which was first detected in Shanghai and Anhui in late March 2013.The H7N9 avian influenza is the world's first discovery of a new subtype of influenza virus, which has not yet been included in China's statutory reporting system for infectious disease surveillance and reporting, and for which a vaccine had not yet been launched by early April 2013.
The H7N9 avian influenza is a new type of avian influenza, which was first detected in Shanghai and Anhui at the end of March.
Symptoms
Symptoms of acute respiratory infections such as fever and coughing, especially high fever and difficulty breathing.
Response measures
After the emergence of the case, the local health department attached great importance to it, and promptly took measures such as clinical treatment, epidemiological investigation, specimen collection and delivery for examination, and medical observation of close contacts, as well as strengthened the monitoring of cases of unexplained pneumonia.
The main manifestations of the three confirmed cases: typical viral pneumonia, acute onset, early in the course of the disease are high fever (38 ℃ or more), coughing and other respiratory tract infection symptoms. Onset of 5-7 days of respiratory distress, severe pneumonia and progressive aggravation, some cases can rapidly develop into acute respiratory distress syndrome and death.