The term disinfection is explained as follows:

refers to the method of killing pathogenic microorganisms, but not necessarily bacterial spores. Chemical methods are usually used to achieve disinfection. The chemical used for disinfection is called disinfectant. Sterilization refers to the method of killing all microorganisms (including bacterial spores) on an object, usually by physical means.

: the meaning of disinfection

The disinfection of infectious diseases is to eliminate pathogens that stay on different transmission media by physical or chemical methods, so as to cut off the transmission route and prevent and control the occurrence of infection. Objective:

(1) To prevent pathogens from spreading to the society and causing epidemics.

(2) to prevent patients from being infected by other pathogens, resulting in complications and cross-infection.

(3) It also protects medical staff from immune infection.

disinfection measures alone are not enough to achieve the above objectives. Necessary isolation measures and aseptic operation at work must be carried out at the same time to achieve the effect of controlling infection.

The disinfection effect of infectious diseases caused by different transmission mechanisms is different.

Gastrointestinal infectious diseases, pathogens are excreted with excrement or vomit, and the pollution range is relatively limited. If it can be disinfected in time and normally, the transmission route can be cut off and the transmission can be interrupted.

respiratory infectious diseases, pathogens are discharged with breathing, coughing and sneezing, and then spread through droplets and dust, and the pollution range is not exact, so it is difficult to disinfect. Spatial isolation must be taken at the same time to interrupt the infection. Insect-borne infectious diseases adopt methods such as killing insects and rats.

: methods for checking disinfection effect

1. Surface inspection of articles. Draw two areas of 1cm2 in the adjacent parts of disinfected articles. Samples were taken with sterile cotton swabs before and after disinfection, and cultured for 24-48 hours after inoculation to observe the results.

2. Before and after the inspection and disinfection of excreta, take .2ml of diluted excreta and inoculate it into the broth tube, cultivate it at 37℃ for 24 hours, then take samples and switch to the corresponding culture medium, and observe the results after 24 ~ 48 hours.

3. The natural sedimentation method is generally used to check the air disinfection effect. Before and after disinfection, there are different planes and positions in the disinfection space. Place 4 ~ 5 planes, cover them after exposure for 5 ~ 3 minutes, and cultivate them for 24 ~ 48 hours to observe the results.