How many types of lice are there and what color are they?

As shown in the figure below:

Lice eggs are milky white or gray-brown, usually parasitic in the hair follicles, and are not easily observed by the naked eye, so it is recommended to use a microscope for specific observation.

Head lice is a small gray wingless insect, female lice in 1-2 days after mating, that is, begin to lay eggs, the eggs laid are lice eggs, their reproductive ability is very strong, about 3-9 grains per day, can reproduce more than 100 grains in a lifetime.

Hazards:

If the adults and larvae of lice are not treated, they will always suck blood on the scalp or ** of the host. Hosts are generally common animals and plants, such as cattle and sheep, and of course, humans are also one of their hosts.

Lice not only suck blood, but also make the host feel particularly itchy, especially in the hair, which will make the host scratch the hair involuntarily, and they cannot be removed by ordinary means, and they can also transmit many particularly serious diseases.

1. Basic features:

Lice: There are three types of body lice, head lice and pubic lice. Body lice, commonly known as clothing lice, are gray or off-white, with a slightly olive-shaped head, indistinguishable thoracic fusions, and a pair of stomata on either side of the mid-thorax.

The abdomen is long and flattened, divided into 9 segments, 7 segments can be seen in appearance, a pair of stomata on both sides of each segment, the tail end of the abdomen of the male lice is round and blunt, and the tail end of the female lice is bifurcated, resembling the shape of the W-shaped jujube silver.

Mites: The adult body of the scabies mite is nearly round or oval, with a raised back, milky white or light yellow. The jaw is short and located at the anterior end.

The chelicerae are pincer-like and have small teeth at the tip, which are suitable for feeding on the cuticle tissue of the host**. The dorsal body has transverse wavy striations and rows of scaly skin spines, and the posterior half of the body has several pairs of rod-like bristles and long bristles.

2. Main symptoms:

Lice: Itching is the main symptom, but the degree of itching varies from person to person. Itching occurs only when caves, lice bites and saliva is injected. Small pubic lice can be found at the base of the hair follicle, light black, grayish-white, or red (full of blood).

There are often microscopic holes (invisible to the naked eye) at the bite of pubic lice, local redness, small red spots, blood crusts on them, local allergic reactions, often raised and papules. Large blue-gray spots can be seen near the affected area, which are not painful or itchy, do not fade when pressed, and can last for several months, and this blue-gray spot can also be seen on the chest and abdomen, medial thighs, etc.

Morphological characteristics:

The adult body of the scabies mite is nearly round or oval, with a raised back, milky white or light yellow. The size of the female mite is; Male mites for.

The jaw is short and located at the anterior end. The chelicerae are pincer-like and have small teeth at the tip, which are suitable for feeding on the cuticle tissue of the host**. The barbels are divided into three segments.

No eyes and valves. The dorsal body has transverse wavy striations and rows of scaly skin spines, and the posterior half of the body has several pairs of rod-like bristles and long bristles. The abdomen stool has a smooth surface, with only a few bristles and 4 pairs of legs.

The color of lice can be gray or off-white, and there are also dark black.

Lice are wingless parasitic insects, usually smaller than sesame seeds, and their adult body is about 2-3 mm long and round in size. Lice are six-legged, winged, and are ectoparasites of mammals and birds, and they feed on blood. Lice are highly adapted to the host, and they can live, multiply, and spread on the host's **.

Since the mouthparts of lice can puncture the host's **, they can transmit diseases such as typhus and relapsing fever.

The production process of lice:

In the life cycle of lice, the egg is the initial stage. The eggs laid by lice are yellow or white in color and usually attach to the host's hair. After a period of hatching, these eggs gradually become larvae, then go through the nymph stage and eventually grow into adults.

As the eggs of lice go from hatching to nymph to adult, they need to feed on the host's blood to obtain sufficient nutrients and nucleus capacity. Therefore, the host is an integral part of the lice's life cycle. <>

The lice are gray or grayish-white, the head is slightly olive-shaped, the thoracic segments are indistinguishable from each other, and there is a pair of stomata on either side of the midthorax. The abdomen is long and flattened, divided into 9 segments, 7 segments can be seen in appearance, a pair of stomata on both sides of each segment, the tail end of the abdomen of the male lice is round and blunt, and the tail end of the female lice is bifurcated, resembling a W shape.

The life span of lice is about six weeks, each female lice lays about ten eggs a day, lice eggs can firmly adhere to the hair or clothing of human and animal bodies, in the body environment of human and animal bodies, after about eight days can hatch into larvae, immediately bite people and suck blood, after about two or three weeks through three molts can grow into adults.

Lice are a nuisance parasite that can grow if you have pets such as cats and dogs that don't take care of them often, or if you don't pay attention to hygiene and don't like bathing. At present, there are three kinds of lice that people know about are body lice, head lice and pubic lice.

If the host is out in the spring, lice may crawl from the surface of the body onto the top of the clothing and continue to spread outward. This bug also likes to suck blood, and specifically likes to suck human blood, which is quite a nuisance for humans.

What are the types of lice?

There are three types of lice: the first is the body lice, which is a gray or grayish-white insect with a somewhat olive-shaped head and a pair of blomat on either side of the mid-thorax.

The second type is head lice, in the past, in the countryside, many children did not pay attention to hygiene, this kind of lice is also relatively common. It is darker in color and smaller in size, with a dull black belly around the edges.

The third type is pubic lice, which is grayish-white in color, has roughly equal width and length of the body, and has a relatively short abdomen with no obvious segmentation.

How to get rid of liceIf there are lice on the hair, you can directly shave the hair off that piece, and then clean up some of it. The hair can be washed with medication, or the hair can be shaved directly.

How to avoid lice

Personal hygiene is very important, not only to wash your hair frequently, but also to avoid rain. The clothes and sheets at home should also be washed frequently, and no hiding place for lice should be given.

Lice are one of the top 10 most common pests in the world, and they are indeed quite common and disgusting, but as long as you take a lot of bathing and hygiene, you can make it have nowhere to hide.