These small animals are extremely poisonous and a bite can kill people

There are many species of jellyfish, but almost all of them are poisonous to some degree.

The toxicity of jellyfish comes from their stinging cells. This cell grows at the front end of its tentacle. It is a fluid-filled sac with a hollow, winding tube inside. There is a small needle on the surface of the stinging cell called a cnidocyte, which acts like a switch. When the cnidocyte needle is touched, the stinging cell will immediately shoot out the tube. These tubes containing venom will paralyze the stung organism.

The most venomous jellyfish known is the box jellyfish found in Australia :

Once a person is stung by its tentacles, he will die within 3 minutes and there is no cure. In the past 25 years, about 60 people have died from box jellyfish poisoning off the coast of Queensland, Australia, but only 13 people have died from sharks.

After being stung by a jellyfish, people usually feel an electric shock-like tingling sensation within a few minutes. After a few hours, the injured area gradually develops a linear rash with erythema, which is itchy and burning. In mild cases, it can heal itself in about 20 days. In severe cases, there are often coughing and asthma attacks, spitting out white or pink foamy sputum, accompanied by signs of anaphylactic shock such as weak pulse, cyanosis of the skin and low blood pressure. If rescue is not timely, patients with such stings may die within a short period of time.

The stinging sensation after a jellyfish sting

If you are stung by a jellyfish, do not rinse with fresh water, as fresh water can cause the nematocysts to release venom. Instead, wipe off the tentacles or venom stuck to the skin with a towel, clothes, or mud as soon as possible. You can use sodium bicarbonate (baking soda) or alum to clean the wound. If the injury area is large and the systemic reaction is severe, go to the hospital for treatment immediately.

Ticks (pí) are also called mites.

Commonly known as grass lice, dog turtles, grass lice, cattle lice, rove bugs, grass ticks, dog beans, cattle turtles, etc., they often lurk in the grass and plants of low hills, or live in the fur of livestock and other animals. After a tick bites a person, the onset of illness is usually acute and severe, with the main symptoms being fever, accompanied by general discomfort, headache, fatigue, muscle aches, as well as nausea, vomiting, diarrhea, anorexia, and mental depression.

Anaplasmosis caused by tick bites is an infectious disease. People are generally susceptible to this disease. Medical staff or their caregivers who have close contact with critically ill patients and direct contact with patients' blood and other body fluids may also be infected if they do not pay attention to protection.

Tsutsugamushi, also known as chiggers and sand mites, can transmit scrub typhus

Scrub typhus develops rapidly. If treatment is delayed, fever may quickly occur and cause myocarditis, pleurisy, encephalitis, multiple organ failure, and even death. May of each year is the beginning of the outbreak of chiggers in North China and Hong Kong and Macao, and the outbreak reaches its peak from June to September. The weather is relatively warm, and the occurrence period is advanced. Some inexperienced doctors tend to misdiagnose scrub typhus as cancer, influenza, etc., and fatal incidents occur from time to time.

When going out, you can apply some repellent on your clothes, such as potassium sulfide solution, to prevent the parasite from "approaching" you; once you find that these parasites have bitten into the skin, you should not remove them without authorization, so as to avoid improper methods causing them to drill deeper. You should go to a professional medical institution to seek professional treatment.

The reason why tiny mosquitoes can have such terrible lethality is mainly because they can transmit more than 80 diseases.

Among them, malaria is probably the disease that causes the most casualties: this disease kills about 3 million people each year. The Anopheles mosquito that transmits malaria is distributed in Central and South America, Africa, Oceania and Central Asia, especially in Africa. In Africa, a child dies from malaria every 30 seconds.

In addition, most mosquitoes can transmit filariasis (caused by nematodes). This disease causes gumma, an abnormal swelling of the genitals and thighs. Globally, approximately 1.2 million people are infected with filariasis. Most species of mosquitoes transmit virulent diseases, including yellow fever, dengue fever, Japanese encephalitis, St. Louis encephalitis, polyarthritis, Rift Valley fever, Chikungunya fever, and West Nile fever. The only thing that makes us feel lucky is that AIDS cannot be transmitted through mosquito bites.