1, respiratory tract: patients in the hospital are concentrated, and there are many kinds of pathogens, which are easy to cross infection. Respiratory system is an important barrier of human body, and epithelial cells of respiratory mucosa can prevent pathogenic microorganisms from entering the body, thus causing infection.
2. Urinary tract: When patients use medical devices such as catheters, it will destroy the defense function of urothelial mucosa, making pathogens easy to enter the body and cause infection.
3. Gastrointestinal tract: There are certain risks in hospital food hygiene and medical device disinfection, leading to gastrointestinal infection.
4. Surgical site: During the operation, the defense barrier of the patient's skin, mucosa and other parts was destroyed, and surgical instruments, dressings and other items were infected with pathogens due to incomplete disinfection, resulting in infection of the surgical site.
5. Skin and soft tissue: Skin and soft tissue are the first line of defense for the human body to contact with the outside world. Pathogens enter the body through damaged skin, mucosa and other parts, causing infection.