Lead
Lice have a very strong vitality, one is due to their ability to reproduce, but this is not the most important thing, lice can survive with humans, this is where their vitality lies.
But now, due to the development of science and technology, human beings are conducting research on various diseases, and the ensuing disappearance of lice-borne diseases has also reduced the living environment of lice, and some experts say that lice are about to be extinct, and may even be extinct.
So why are lice going extinct so quickly?
Lice evolved with humans.
1. It is divided into three categories.
As for the earliest appearance time of lice, there is no specific identification in the academic community, but it is roughly about 100 million years ago that there was an insect animal called insects on the earth, and lice are one of these creatures.
Like other organisms, lice are divided into two types, female and male, although there are cases of parthenogenesis, which only occurs in ectoparasitic lice.
Lice can generally be divided into three categories, which are: single tick lice, large lice, and crab lice.
First of all, there are single-valve lice, which are smaller, flattened, and somewhat similar in appearance to crabs, and can only be seen as lice on their heads.
The horns of single-tick lice each have a pair of small banded antennae, which are important tools for them to climb trees.
Large lice are much smaller than crabs and have hooked bristles that can be used to catch them. Crab lice are the most common in size, and they are the larvae of insects from the second stage of the water.
Moreover, crab lice are a common type of lice in humans, which can parasitize not only on the head of humans, but also on the cortex of mammals.
2. The living habits of lice.
The reproductive ability of lice is very strong, female lice will always lay about 3000-5000 eggs in their lifetime, and a small corpse lice can reproduce about 20-30 times in a year, and the lice born will become the mother lice of another batch of lice, so the number of lice is very large.
Lice generally parasitize on the host for a lifetime, unless they are washed off by the host when bathing, so the lifespan of lice is generally a period of time, because their reproductive ability is relatively strong, so lice will be very happy from birth to death in this life, and there is no trouble.
Pedic-borne diseases.
1. Types of lice-borne diseases.
At present, lice-borne diseases mainly include kala-azar, typhus, typhoid fever, meningoccal meningitis looting, relapsing fever and epidemic typhus.
Among them, relapsing fever has the highest lethality rate, which can reach 60%.
In the past, there was also a disease called "infected legs", which caused severe ulcers and bleeding to occur in infected legs, which could eventually lead to rotting of the feet or direct death.
2. The transmission route of lice-borne diseases.
Lice are so fertile that they can spread anywhere, but when it comes to spreading lice-borne diseases, lice on the human body are more likely to spread them.
Moreover, there are many ways to spread lice-borne diseases, not only through human bites, but also through people's clothing, bedding and furniture at home, etc., because lice can spread at will in people's homes, people's clothes, etc., so there are many infectious diseases.
3. The living environment of lice.
Because lice generally parasitize the human body, and lice also have greater requirements for temperature, humidity, etc., they will only live in a warm, humid environment.
With the continuous improvement of modern diagnostic technology, scientists can already prevent and control these infectious lice-borne diseases, and there are many methods such as insecticides to control them, and also limit the living environment of lice.
At the beginning, lice are very adaptable, they can adapt well to various environments, but with the continuous control of lice vector diseases, the living environment of lice is also decreasing, which is a fatal blow to the number of lice.
4. The evolution of scientists themselves.
Lice, like humans, are constantly evolving.
In the past, people would use iron and other materials to control lice, but with the development of science and technology, there are now various modern lice killers to control the number of lice, which also has caused a fatal blow to lice.
Nowadays, it is rare to see lice in our homes, which is a manifestation of technological progress and, on the other hand, a result of the evolution of lice themselves.
5. The reason why lice are about to become extinct.
Scientists are very happy about the reduction of the number of lice, which is also a manifestation of the continuous improvement of the current level of science and technology, and also a proof of the continuous improvement of people's living standards, but people can not help but feel a little worried about the rapid reduction of the number of lice after celebrating the reduction of the number of lice.
There is a view that the number of lice will rebound after a certain period of time, because their reproductive ability is so strong, but when the level of human technology improves again, the control of lice will become easier and easier, for the current state of lice is about to become extinct, scientists also have a simpler explanation, lice are constantly evolving, and the simplest explanation is that lice are extinct.
epilogue
There seems to be a resentment towards humans in the eyes of lice, which is also due to the reduction of their living environment due to our research, which has led to a decrease in the number of lice.
Therefore, for it, the biggest enemy of human beings is ourselves, since the study of human diseases, lice are also constantly evolving, so that the number of lice is decreasing day by day, and even has the possibility of extinction.