How is upper respiratory tract infection caused

summary

Respiratory tract infection will have a certain impact on the lungs and tonsils of patients, and now many people will have upper respiratory tract infection, which will lead to a series of symptoms. In order to better defense, let's talk about how upper respiratory tract infection is caused.

How is upper respiratory tract infection caused

First, 70% - 80% of upper respiratory tract infections are caused by viruses. They include rhinovirus, coronavirus, adenovirus, influenza and parainfluenza virus, respiratory syncytial virus, ECHO virus, Coxsackie virus, etc. Another 20% - 30% of the upper respiratory tract infection was caused by bacteria. The most common bacterial infection is hemolytic streptococcus, followed by Haemophilus influenzae, pneumococcus, Staphylococcus, and occasionally Gram-negative bacteria.

Second: all kinds of reasons that lead to the decrease of the defense function of the whole body or respiratory tract, such as cold, rain, climate change, excessive fatigue, etc., can make the virus or bacteria that originally exist in the upper respiratory tract or invade from the outside proliferate rapidly, thus inducing the disease. The elderly and young, weak, low immune function or patients with chronic respiratory diseases are susceptible.

Third: poor health habits and living conditions, such as crowded accommodation, poor ventilation, dark and humid, lack of sunshine, parents smoking, poor nursing and lack of exercise, the defense function is even lower. For example, cold can easily cause dysfunction of nasal mucosa, which is conducive to the occurrence of upper respiratory tract infection. Most of the main reasons are caused by virus infection, a few are caused by bacterial infection, upper respiratory tract infection is commonly known as cold, laryngitis, tonsillitis and other diseases.

matters needing attention

To sum up, upper respiratory tract infection is mainly due to some viruses entering the respiratory tract through the mouth, which causes certain inflammation of the respiratory tract. Patients should develop good health habits and living habits. Room should also be more ventilation, promote air circulation, so as to reduce the virus into.