What are the four types of evils?

The four pests include flies, mosquitoes, rats, and cockroaches.

The harm of the four evils:

1. Flies: Flies breed and fly among garbage, manure pits, toilets, rotting animal carcasses, pus, blood, sputum and vomit, and feed on them. It carries tens of thousands of bacteria, viruses and parasite eggs on its body and abdomen.

Flies have the habit of eating, spitting and pulling, and it flies down to **, ** food will be contaminated by bacteria, viruses, and eggs, and when people eat contaminated food or use contaminated eating utensils, intestinal infectious diseases can occur into parasitic diseases.

2. Mosquitoes: Mosquitoes have blood-sucking habits, looking for human or animal amino acids when sucking blood, especially babies or ** delicate, mosquitoes can inject malaria parasites, filarial larvae, Japanese encephalitis virus and other saliva into the human body with saliva to make people infected with the disease, therefore, mosquitoes not only bite people to suck blood and affect sleep, but also transmit Japanese encephalitis, malaria, dengue fever, filariasis, etc.

3. Rats: The harm of rats is well known, it not only steals food, bites furniture, clothing, books and stationery, destroys buildings, bites off wires, etc., causing economic losses, and is the most serious in the "four pests", rats mainly spread plague, leptospirosis, lambiasis, epidemic hemorrhagic fever, endemic rash, typhoid fever and other infectious diseases through their ectoparasites (rat lice) bites and blood sucking or their excrement pollution.

4. Cockroaches: Cockroaches often crawl in toilets and garbage cans, sucking dirt, and their bodies are covered with bacteria, viruses and parasite eggs, and they also like to forage on people's food and leftovers, so that the utensils and food are contaminated, which can cause infectious diseases such as hepatitis A, dysentery, typhoid fever, cholera, or bacterial food poisoning, as well as parasitic diseases such as roundworms and hookworms.

In recent years, cockroaches have also been found to cause allergic rhinitis, bronchial asthma and other allergic diseases in some people.

The four pests are flies, mosquitoes, rats, and cockroaches. Flies can transmit more than fifty diseases and can accelerate the spread of epidemic diseases. Mosquitoes can transmit diseases and can itch after being bitten by a mosquito.

Rats are the reservoir or vector of many diseases. Cockroaches can carry a variety of worm eggs.

Flies: Flies are a very common insect that is good at flying and loves to be active during the day.

Mosquitoes: Mosquitoes are mostly found in the summer months. Studies have shown that mosquitoes can transmit up to more than 80 diseases.

Rats: Rats are prone to parasites on their bodies that bite humans and suck blood to transmit pathogens to humans. If bitten by a rat, the pathogen will cause infection directly through the trauma.

Cockroaches: Cockroaches can carry bacteria such as cholera, pneumonia, tuberculosis and other diseases in Asia, and are also intermediate hosts for many nematodes such as Candida candida, tapeworm brevis, and tumor tubes.

The four pests refer to flies, mosquitoes, rats, and cockroaches.

On February 12, 1958, the Communist Party of China issued the "Instructions on Eliminating the Four Evils and Stressing Health". It is proposed to complete the task of eradicating flies, mosquitoes, rats and sparrows in 10 years or less.

Gradually, the sparrows were "rehabilitated" and replaced by bed bugs. Later, due to changes in social life, bed bugs were replaced by cockroaches. Therefore, the "four pests" were eventually identified as flies, mosquitoes, rats, and cockroaches.

Summary. The four pests refer to rats, mosquitoes, flies, and cockroaches. This concept is often used to promote hygiene, epidemic prevention and pest eradication efforts.

The four pests refer to rats, mosquitoes, flies, and cockroaches. This concept is often used to promote hygiene, epidemic prevention and pest eradication efforts.

The four pests usually refer to the four pests of rats, mosquitoes, flies, and cockroaches. The methods of preventing the four pests mainly include the following:1

Household cleaning: Clean the house frequently, especially in corners, crevices, kitchens and bathrooms, and other places that are prone to pests. Clean up the dust regularly and maintain indoor hygiene.

2.Plug the loopholes: Use silica gel, foam glue, etc. to plug the holes in the walls and floors of the house, and seal the doors, windows, drains, etc., to prevent pests from entering and exiting at will.

3.Garbage classification: Separate and put domestic garbage, kitchen waste, and hazardous waste into the garbage, do not pile up garbage or food residues, and clean up in time.

4.Prevent mosquito bites: Keep the room ventilated and dry, avoid puddles, stagnant water and other mosquito breeding environments, such as wearing long clothes and pants when going out, and apply mosquito repellent.

5.Use pesticides: If the above measures do not completely prevent the breeding of pests, you can use pesticides or ask a professional pest management company to deal with them accordingly.

However, when using pesticides, read the instructions carefully, pay attention to the dosage and application method, and avoid harm to the human body and the environment. Through the above measures, we can effectively prevent the breeding and reproduction of the four pests and create a safer and more comfortable living environment.