As the temperature rises, all kinds of poisonous and non-toxic bugs are affecting people's lives again. For example, the "tick" that caused the death of four people, as well as the "cryptoptera", are all haunted. This all shows that the arrival of summer we need to be defensive in advance to avoid the impact of these bugs on us.
However, when talking about these bugs, some people are saying, why are these bugs still there, how come the "lice" we saw decades ago have not been seen in recent years?
What a situation this is. This creature can once be said to have spread in many people, and it is also a state that makes many people feel "flustered", and it has not been seen in recent years.
Is there any trick? Can we get rid of ticks, cryptopters, and other species that affect humans, just like we got rid of "lice"? In fact, there is a problem here, that is, the living environment is different, which is difficult to do. First of all, let's understand the "lice"
What kind of creature is a "lice"?
The creature "lice" may have been encountered by someone, especially in the 70s and 80s, basically many people have it. And "lice" are divided into three species, including body lice (Pediculus humanus corporis), head lice (Pediculus humanus capitis), and punctates (Phthirus pubis). Of course, the areas in which these three kinds of "lice" operate are also different, and here we mainly explain the "head lice".
The head lice is a small, gray wingless insect, and its adult and nymphs suck blood on the host for life, while the main host includes terrestrial mammals, a few marine mammals, including us humans are also within its host range. So, once upon a time we used to see this creature a lot. Head lice, on the other hand, mainly inhabit the head of a person.
However, this creature is very "disgusting", it can be said that it is really "notorious", and no one wants to see this creature.
According to a study of lice by researchers Bret Boyd and David Reed at the Florida Museum in the United States, the creature is the same existence that can be traced back to the oldest great ape, the world's oldest monkey, including in human ancestors. The history of existence is probably 20-25 million years ago. Therefore, lice have co-evolved and coexisted with humans, and have coexisted with humans for tens of millions of years.
Like two other classes of lice, the genome of lice symbiotic lice contains most of the genes used to synthesize vitamins, and without this part, it is difficult for lice to survive. Therefore, lice in humans, chimpanzees, gorillas and other organisms, is to absorb the correlation of the substance to survive.
For lice, the reproductive ability is also very strong, each female lice lay about ten eggs a day, the eggs are firmly attached to the human hair or clothing, and then propagated, so it is very difficult to eliminate, and can only reduce its number through the common grate, but it can not be directly removed at all.
So why have lice been so hard to see in recent years?
In fact, for people in the 70s and 80s, they basically crossed this stage, and it is true that it is difficult to see lice in recent years. What is the reason for this? In fact, the biggest reason is still related to the living standards of human beings.
It can be said that in the 70s and 80s, the living standards of human beings can be said to be quite poor, completely "not enough to eat and wear and not warm" state, people in the 70s may feel the most obvious, the 80s are still slightly better. Such living conditions, let alone bathing, can be said that even eating is a big problem. With the improvement of human living standards, such a state of life has long changed.
Bathing with water is a normal thing, you can take a bath almost every day, at the same time, you also use dozens of shower gels to bathe, wash your hair with dozens of shampoos, and so on. This is completely so that the lice have no way to survive.
Then there must be no living space for lice. Therefore, the improvement of human living standards has greatly improved the sanitary conditions in the living area and the sanitary conditions of their own bodies. There must be no way to survive.
Moreover, many toiletries also add various insecticidal ingredients, and the lice have no way to survive. This is why, "lice" have coexisted with humans for thousands of years, and it is difficult to see them in these years, because there is no living space for it.
So why didn't ticks, cryptopterycts disappear?
Everyone knows what is known about these two creatures, and ticks are extremely harmful.
Ticks – it carries more than 100 viruses, and according to statistics, as long as it is bitten by ticks, the average mortality rate of tick disease is 7.3%, and the maximum mortality rate can reach 30% (the fatality rate is as high as 30%). In addition to humans, animals can also be infected with the virus. So, it's really hateful.
Cryptoptera – The same is true of Cryptoptera , which secretes a venom with a pH of 1-2 if it directly flaps at Cryptoptera. It can cause strong burns, dermatitis, redness, blisters and even ulceration. Serious situations can also pose a threat to our lives. Therefore, this bug is also called "flying sulfuric acid".
So, judging from the situation of these two creatures, it is really not allowed to survive. So why haven't ticks, cryptopteropters, disappeared?
The biggest difference between ticks, cryptopteryns and other creatures and lice is that they can "survive in the wild", and the habitat of ticks is mainly in forests, bushes, grasslands, and semi-desert areas.
Cryptoptera, on the other hand, is widely distributed, almost all over the world, and prefers humid environments. Therefore, even if we destroy ticks, cryptoptera and other creatures around us, it is still impossible to completely eliminate them, which is very difficult.
Lice are different. Lice are parasitic insects that have fully adapted to the surface environment of the host body, and their requirements for the parasitic environment are relatively constant and specific.
Without the host, it cannot be generated. Therefore, as long as the lice on the host are eliminated, it is impossible to continue to exist. So that's why. This is because "lice" can be eliminated, and ticks, cryptoptera and other organisms are difficult to eliminate, in fact, their living environment is different, there is no know-how.
On that day, the commonality is that the ability to reproduce is particularly strong. We can only strengthen our own defenses, especially ticks, cryptoptera and other species, when the temperature is high, it is easy to appear, which may pose a huge threat to people.