What are the symptoms of influenza virus infection?

summary

I believe that everyone is very familiar with influenza. Basically everyone has had the experience of influenza. To prevent the occurrence of influenza, we should do a good job in daily prevention, strengthen physical exercise, and develop good eating habits. If you have influenza, don't ignore it because it is too common. If you don't treat minor illness, it will turn into serious illness. Today, I would like to introduce to you the symptoms of influenza virus infection.

What are the symptoms of influenza virus infection?

After influenza virus infection, the bronchial inflammatory response and abnormal lung function can last for weeks to months. Lung function study can also find restrictive and obstructive ventilation dysfunction, accompanied by abnormal alveolar gas exchange, decreased carbon monoxide diffusion capacity, airway hyperresponsiveness.

The clinical symptoms of influenza may be related to pro-inflammatory cytokines and chemokines. In vitro infection of human respiratory epithelial cells with influenza virus can lead to the production of IL-6, IL-8, IL-11, TNF -, RANTES and other mediators. In clinical human infection test, a series of cytokines in nasal lavage fluid will increase, including IFN - and IFN- γ、 IL-6、TNF-、IL-8、IL-1 β、 IL-10, mcp-10 and MIP-1 / MIP-1 β， The levels of IL-6 and TNF - in the blood also increased. The over expression of MCP-1, IP-10, MIG and other cytokines in the death cases of human H5N1 avian influenza may be part of the causes of severe pneumonia and multiple organ injury in human avian influenza patients.

Only a few cases of seasonal influenza have viremia or extrapulmonary infection. In the cases of human H5N1 avian influenza infection, the viral load in the lower respiratory tract is higher than that in the upper respiratory tract, and that in the throat is higher than that in the nasal cavity. Sometimes viremia, gastrointestinal infection, extrapulmonary transmission and occasionally central nervous system infection may occur. Virus can be detected in heart, liver, spleen, kidney, adrenal gland, muscle and meninges, and also in cerebrospinal fluid of patients with central nervous system symptoms.

matters needing attention

The regulation of diet and nutrition in daily life will also be of great help to the treatment of influenza. During the period of influenza, pay attention to drink more water, rest more and eat more fresh fruits and vegetables.