Thoughts on scientific disinfection (1)

As a disinfection worker, we actively and deeply participate in our own work, constantly immerse ourselves in nature and accumulate, and carry out countless disinfection prevention and control tasks. Our theoretical knowledge has been improved a lot, and we have accumulated a lot of on-site experience. There are some regrets and thoughts. Today, you want to talk about scientific disinfection, Talk about your thoughts with you.


We all know that the source of infection, the route of transmission and the susceptible population are the three essential elements of the epidemic of infectious diseases, and disinfection is an important measure to cut off the route of transmission.


Many people’s understanding of disinfection is to spray. It’s obviously wrong to spray it. Spraying is just a chemical disinfection method.


The purpose of our disinfection is to kill or remove the pathogenic microorganisms on the transmission medium, so whether we really kill the pathogenic microorganisms after spraying and achieve the purpose of cutting off the transmission route, all of which need to evaluate the effect of disinfection with scientific methods.


2002 “disinfection technical specifications” put forward in the disinfection technical requirements of epidemic areas that “fill in disinfection work records and evaluate disinfection effect when necessary”, and clearly stipulated the microbiological evaluation standard of disinfection effect in epidemic focus

Those who meet all the following requirements can be judged as qualified for disinfection treatment:


(1) After disinfection, corresponding pathogenic bacteria shall not be detected in the disinfection object.

(2) The killing rate of natural bacteria in the disinfection object shall be ≥ 90%.

(3) The residual amount of relevant indicator bacteria shall not exceed the relevant provisions of the state.

The purpose is to evaluate the disinfection effect of various disinfection measures on the contaminated objects in the epidemic focus with microbiological indexes, so as to serve as the basis for whether the disinfection is qualified or not.


20 years ago, there were requirements and evaluation criteria, but they did not receive much attention.

In the emergency work of major disasters and epidemic situations, disinfection will briefly emerge in everyone’s vision. In most cases, disinfection work in the field of public health has a weak sense of existence, is not paid enough attention, there are few top-down scientific research projects, the development lags behind, and professional training and learning is extremely lacking. From experts in the disinfection industry to professional technicians at the grass-roots level, the personnel structure is extremely unreasonable, and the talent reserve is difficult to talk about. Slowly, over time, many “worries” were buried.

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Post time: Mar-11-2022