What symptom can be bitten by insect

summary

Ticks are parasites. They like animals with dense fur, especially cattle. They can often be found on the inside of the four legs below the neck of cattle. They often gather in groups and are not easy to be eliminated. They are very common in Sichuan, Yunnan, Guizhou and other rural areas. There is a mole on the back of the body of the adult tick, drawing a hard shield plate, which is commonly known as hard tick. It belongs to the family Ixodidae. Those without shield plate are collectively referred to as soft skin and soft leather. About 800 species have been found in the world. About 100 species of Ixodidae have been recorded in China, and 10 species of soft tick have been recorded in China. Ticks are temporary parasites on the body surface of many vertebrates, and they are vectors and storage hosts of some zoonoses. Let's take a look at the following.

What symptom can be bitten by insect

First, ticks have no pain when biting and sucking blood. However, because of the lower plate of the chela and penetrating into the host at the same time, it can cause local congestion, edema, acute inflammatory reaction and secondary infection. In the process of biting and sucking blood, some ticks secrete neurotoxins in saliva, which can lead to the conduction disorder of host motor fibers, cause ascending muscle paralysis, and cause respiratory failure and death.

Second: after the tick bites, it will send out a kind of anesthesia, burying the head in the skin to suck blood. At the same time, it secretes a kind of substance that can be harmful to the human body, which needs to be taken out in time. If it is not taken out in time, the light patients will itch hard after a few years, and the severe patients will have high fever, deep coma and convulsion, causing forest encephalitis. three

Third, ticks can infect human peripheral blood neutrophils after biting. Fever with white blood cells, thrombocytopenia and multiple organ dysfunction are the main clinical manifestations. The main symptoms are fever with general discomfort, headache and fatigue, muscle soreness, nausea, vomiting, anorexia, mental impotence, etc.

matters needing attention

After the tick invades the human body, the time of sucking blood is related to the type of skin. Some skin can stay on the body surface for one to several days without pain when biting. 24-48 hours after the drug treatment, there are different degrees of local inflammatory reaction, mild local golden erythema, central ecchymosis or ecchymosis, severe edema erythema or papules around the point.