What are the types of pathogenic organisms and their characteristics?

The classification of pathogenic microorganisms refers to the division of pathogenic microorganisms according to the infectivity of pathogenic microorganisms and the degree of harm to individuals or groups after infection, which are divided into four categories.

The first and second categories are the first category of highly pathogenic pathogenic microorganisms, microorganisms that cause very serious diseases in humans or animals, and microorganisms that have not yet been discovered or eliminated in China, such as Yersinia pestis, Vibrio cholerae, and smallpox virus.

Yellow fever virus, Xinjiang hemorrhagic fever virus, Lassa fever virus, Ebola virus.

Wait. The second category is microorganisms that cause serious diseases in humans or animals and are more likely to be transmitted between humans and animals, animals and animals, such as Brucella, Bacillus anthracis, Clostridium botulinum, Leprosy bacilli, Mycobacterium tuberculosis, rabies virus, forest encephalitis virus, and epidemic hemorrhagic fever.

Viruses, various rickettsia, etc. The third category, can cause diseases in humans or animals, but generally do not pose serious harm, the risk of transmission is limited, laboratory infection rarely causes serious disease, with effective ** and preventive measures of microorganisms, such as Neisseria meningitidis, pneumococcus, staphylococcus, streptococcus, gonorrhea.

Neisseria and others. The fourth category, microorganisms that do not usually cause diseases in humans or animals, such as biological products, vaccines, various attenuated and attenuated bacteria used in vaccine production and those that do not belong to the above.

A variety of low-pathogenic microbial strains of the first, second and third categories.

Regulations on the Management of Biosafety in Pathogenic Microbiology Laboratories

Article 7: The state divides pathogenic microorganisms into four categories based on their infectiousness and the degree of harm they pose to individuals or groups after infection:

1. The first category of pathogenic microorganisms refers to microorganisms that can cause very serious diseases in humans or animals, as well as microorganisms that have not yet been discovered or have been declared eliminated in China.

2. The second category of pathogenic microorganisms refers to microorganisms that can cause serious diseases in humans or animals and are relatively easy to spread directly or indirectly between humans and people, animals and animals.

3. The third category of pathogenic microorganisms refers to microorganisms that can cause human or animal diseases, but generally do not pose serious harm to humans, animals or the environment, have limited transmission risks, rarely cause serious diseases after laboratory infection, and have effective and preventive measures.

4. The fourth category of pathogenic microorganisms refers to microorganisms that do not cause human or animal diseases under normal circumstances.

The first and second categories of pathogenic microorganisms are collectively referred to as highly pathogenic pathogenic microorganisms.

Pathogens, microorganisms can be divided into eight categories, namely bacteria, viruses, rickettsia, spirochetes, mycoplasma, chlamydia, fungal actinomycetes.

Currently yesPathogenic microorganismsIt is divided into four categories, one is the strongest and the four are the weakest.

Category 1: microorganisms that can cause very serious diseases in humans or animals, as well as microorganisms that have not yet been discovered or have been declared eliminated in China. It has high individual hazard and high group hazard, and the diseases caused by it generally cannot be **, such as smallpox virus and Ebola virus.

Wait. Category II: microorganisms that can cause serious diseases in humans or animals, and are relatively easy to spread directly or indirectly between people and people, animals and people, and animals and animals. It has characteristics of high individual hazard and low group hazard, such as highly pathogenic avian influenza.

Viruses, Brucella, etc.

Category 3: microorganisms that can cause human or animal diseases, but generally do not pose serious harm to humans, animals or the environment, have a limited risk of transmission, and have effective ** and preventive measures. It has the characteristics of moderate individual hazard and limited group hazard, such as hepatitis A virus and hepatitis B virus.

Wait. Category 4: Microorganisms that do not normally cause diseases in humans or animals. It has low individual hazard and low group hazard.

Related information. Pathogenic microorganisms refer to microorganisms or pathogens that can invade the human body and cause infections or even infectious diseases. Among the pathogens, bacteria and viruses are the most harmful. Pathogenic microorganisms refer to prions.

Fungi, bacteria, spirochetes, mycoplasma.

Rickettsia, chlamydia, viruses.

After some pathogens are repeatedly exposed to certain chemical drugs, their reactivity is constantly weakened, so that finally the pathogen can resist the drug without being killed or inhibited, which is the pathogen's tolerance to the drug, which is called drug resistance.

or drug resistance. The main cause of drug resistance is insufficient dosage of a drug or long-term use of a drug. Many bacteria develop resistance.

The pathogen develops resistance, often with less or no effect at all. Drug-resistant strains are hereditary, so it is necessary to strictly grasp the indications when it comes to ** diseases to prevent drug abuse.

The above content reference: Encyclopedia - Pathogenic microorganisms.

Pathogenic microorganisms are usually divided into three categories:1. Non-cellular microorganisms.

They do not have a typical cellular structure, nor do they have an enzyme system capable of producing energy, and need to grow and reproduce in other cells. For example, the virus is responsible for the new crown pneumonia, and hepatitis B and AIDS are all caused by viruses.

2. Prokaryotic cell-type microorganisms.

Such pathogenic microorganisms do not have a complete nucleus and imperfect organelles, including bacteria, actinomycetes, chlamydia, mycoplasma, rickettsia, spirochetes, etc.

3. Eukaryotic cell-type microorganisms.

These microorganisms have nuclear membranes and complex organelles, including fungi and protozoa.

Effects on the human body.

Whether pathogenic microorganisms become ill after invading the human body also depends on the body's immune function. Infection and immunity are a contradiction, and their outcome depends on the strength of both the pathogen and the host. If the host is strong enough, infection can not form at all; Even if an infection is formed, the pathogen will most likely die out gradually, so the patient**; If the host is weak and the pathogen is ferocious, the infection spreads and the patient dies.

The above content reference: Encyclopedia - Pathogenic microorganisms.