What is plantain pollen? Do an allergen test. This plant is allergic.

Tell me about everyone's allergic complex

Let me talk about mine first! Who can be worse than me! Because of allergic rhinitis, I often sneeze for about 4 years, and I have never paid attention to it or checked the allergens. Later, when the company was renovated the year before last, there were many small red envelopes on my arms. I went to see it again, allergic dermatitis. At the end of last year, I actually slept at home at night I wake up at about 3 am almost every day, and I'm still a little breathless. I looked it up on the internet and it was over. It seems to be allergic asthma. I really can't stand it. I went to the hospital for a full-scale examination. In fact, it is a very serious allergic constitution. 1 cat, moderately allergic (poor thing is that my cat has been raised for 7 years, how can it be allergic after 4 years? I really don't want to give it away, let alone abandon it. So I decided to give it a warm home and not abandon it. It's just that it has to endure the pain of taking a bath every week. Well, I also want to talk about it. ) 2 dogs, mild allergies (I have kept dogs many times and missed it, but now I have given up this idea). 3 house dust mites, moderately allergic (there are carpets at home, so throw them away when you are ready to decorate). 4 cereal mites, acaroid mites, moderate allergies (I don't know where my home is). 5 mixed with three kinds of molds, moderately allergic (what a nuisance! There are plants at home, thinking that they can purify the air. Who knows that with it, the air will be very humid and mold will be very suitable for growth. Indoor air can not be dry, easy to have dust mites and the like, and can not be wet, easy to have mold. I'm really difficult to serve! )。 6 Fusarium mixture, mild allergy. 7 ragweed is pollen-like and slightly allergic (never heard of it). 8 mugwort, mugwort, mugwort, mild allergy (I don't know where to look, and I don't know how much or how little there will be in the air). Plantago pilosa, mild allergy (unheard of). 10 rose, mild allergy (it is estimated that my future boyfriend will be very happy, and Valentine's Day should be very economical). 1 1 formaldehyde, mild allergy (no wonder). 12 polychlorinated biphenyls, mild allergy (I don't know what it is because I have too little knowledge). 13 phenylmercuric acetate, slightly allergic (I don't know). To sum up, I am basically hopeless and can wait for death. Being alive now is a miracle in the medical field! Acari belongs to Acari, Acari and Arthropoda. They are generally about 0.5 mm in size, some as small as 0.65438 0 mm, and most species are less than 65438 0 mm. ..

Mites and spiders belong to arachnida. Adults have four pairs of feet, a pair of antennae, and no wings and antennae. Their bodies are not divided into three parts: chest and abdomen, but merged into one sac, which is different from insects. Insects are divided into jaws and bodies. Jaws consist of mouthparts and jaw bases, and bodies are divided into feet and end bodies. There are many hairs on the body and feet, and some hairs are very long. There are mouthparts at the front end and a variety of eating habits.

More than 50,000 species of mites have been found in the world, second only to insects. Many kinds are related to medicine. In recent years, it has been found that mites are closely related to people's health, such as gamasid mites, chigger mites, scabies mites, demodex mites, acaroid mites, dust mites and cattail mites, which can bite people to suck blood and invade the skin, causing "rosacea" or demodex mites, allergies, urinary acariasis, pulmonary acariasis, intestinal acariasis and scabies, seriously endangering human health.

Broadly speaking, mites can be said to be everywhere, all over the ground, underground, mountains, water, inside and outside living things, with fast reproduction, large number and many kinds. For example, spider mites (also known as red spiders) and acaroid mites can harm crops and fruit trees; Sarcoptes, hair follicle mites and lung mites are parasitic in humans and animals and spread many diseases. Dust mites in our homes, floors and carpets can cause many allergic diseases (asthma).

There are two main kinds of mites parasitic on human body, one is hair follicle mite, also called human demodex, and the other is sebum mite, which is parasitic in sebaceous glands of human face and is generally referred to as mite.

Sarcopodidae is a permanent parasitic mite belonging to Sarcopodidae. Parasitic on the epidermis of human and mammalian skin, it causes a stubborn skin disease with severe itching, namely scabies.

Morphology: The adult body of Sarcoptes scabies is nearly round or oval, with raised back, milky white or light yellow. The size of female mites is 0.3 ~ 0.5× 0.25 ~ 0.4 mm; Male mites are 0.2 ~ 0.3× 0. 1.5 ~ 0.2 mm, with short jaws at the front end. Pliers are pliers with small teeth at the tip, which are suitable for biting the stratum corneum tissue of the main skin. The whisker limb is divided into three sections. No eyes or valves. There are horizontal wavy stripes and rows of scaly spines on the back of the body, and several pairs of rod-shaped bristles and long bristles on the back half. The ventral surface is smooth, with only a few bristles and four pairs of feet. The foot is short and thick, divided into 5 sections and conical. The distance between the first two pairs of feet and the last two pairs of feet is large, and the base of the feet has horny ingrowth. Both male and female mites have claw pads with long handles at the ends of the first two pairs of feet, which are sensitive parts. The ends of the last two pairs of feet are different. Females have long bristles, while the fourth pair of feet of males have suction pads. The spawning holes of female mites are located in the center of the last two pairs of feet, which are transverse cracks. The external genitalia of male mites is located behind the fourth pair of feet. Both anus are located in the middle of the rear edge of the body.

Life history:

The life history of sarcoptes scabies is divided into five stages: egg, larva, prophase nymph, anaphase nymph and adult. Sarcoptes parasitize on the stratum corneum of human skin, gnawing at stratum corneum tissue, and digging a zigzag tunnel parallel to the body surface at the end of hock joint with claws, where females lay eggs (Figure 32).

Oval or oval, light yellow, thin shell, about 80× 180μm, larvae hatch after 3 ~ 5 days. There are 3 pairs of larval feet, 2 pairs are in front of the body, and 1 pair is near the back. Larvae still live in the original tunnel, or dig another tunnel and molt for 3 ~ 4 days to become pre-nymph. Nymphs, like adults, have four pairs of feet. The genitals of the prophase nymph have not yet appeared, and it takes about 2 days to molt into the anaphase nymph. The oviposition hole of female nymph is not fully developed, but the vaginal hole has been formed, which is suitable for mating. After 3 ~ 4 days, the nymph molts and becomes an adult. It takes 8 ~ 17 days to complete the life history of a generation.

Sarcoptes usually mate on the skin surface at night, especially after male adults and female nymphs mate. Most males die shortly after mating; The female nymph burrows into the host skin within 20-30 minutes after mating, molts into the female body, and lays eggs in the tunnel 2-3 days later. They can lay 2 ~ 4 eggs every day, 40 ~ 50 eggs in a lifetime, and the life span of female mites is about 5 ~ 6 weeks.

Ecology:

1. Parasitic site Sarcoptes often parasitize on soft and thin skin.

2. Moving and digging tunnels Sarcoptes parasitize in the deep stratum corneum of the host epidermis, feed on horny tissues and lymph, dig with claws and forepaws, and gradually form a winding tunnel parallel to the skin. The longest tunnel can reach 10 ~ 15 mm, and the tunnel dug by female mites is the longest, with small longitudinal passages leading to the epidermis at regular intervals. Male mites and hind nymphs can also be dug separately, but it is very short. In the early stage, nymphs and larvae could not dig tunnels, but only lived in tunnels dug by female mites. Female mites can dig 0.5 ~ 5 mm every day, and generally do not go deep below the stratum corneum.

Female mites after mating and fertilization are the most active, crawling 2.5cm per minute, which is also the period when they are most likely to infect new hosts.

3. The influence of temperature and humidity The activity, longevity and infection ability of female adults after leaving the host are related to the temperature and relative humidity of the environment. When the temperature is low and the humidity is high, the life span is long, while high temperature and low humidity are unfavorable to its survival. The optimum diffusion temperature of female mites is 15 ~ 3 1℃, and the effective diffusion time is 1 ~ 6.95 days. Within this time limit, the female mites are normal and contagious.

Pathogenesis and diagnosis: The lesions in the parasitic parts of sarcoptes scabies are papules, blisters and tunnels, which are mostly symmetrically distributed. The scabies papules are reddish, the needle size can be sparsely distributed, and the middle skin is normal; Can also be densely packed, but not merged. At the blind end of the tunnel, worms are often hidden, showing gray spots the size of a needle tip. Severe itching is the most prominent symptom of scabies, which is caused by mechanical stimulation when female mites dig tunnels and allergic reactions caused by excreta and secretions in their lives. Itching is mild during the day, aggravated at night, and more serious after sleep. Severe itching and scratching can cause secondary infection, abscess, folliculitis or furuncle.

According to the contact history and clinical symptoms, it is not difficult to make a diagnosis. If scabies can be found, a diagnosis can be made. In the past, the methods of detecting sarcoptes mostly used sterile needle tip to puncture the end of tunnel and take out sarcoptes. Or drop sterilized mineral oil on the affected part of the skin, then gently scrape the part with a blade, and then remove the objective lens for inspection. Recently, domestic scholars directly examined the skin lesions with anatomical mirror, and found the outline of scabies at the tunnel and its blind end, that is, scabies can be diagnosed by picking out the tip of scalpel, and the positive rate can reach 97.5%.

Many mammalian scabies occasionally infect humans, but the symptoms are mild.

Treatment: The commonly used drugs for treating scabies are: 10% sulfur ointment, 10% benzyl benzoate liniment, 1% DDT cream, 1% Propane 666 cream, compound trichlorfon cream and 10% Youli. Wash the affected area with hot water before treatment, and apply the medicine once a night after drying, with good effect. After treatment, the patients were observed for about 65438 0 weeks. If no new lesions appear, they can be considered as cured.