When do pinworms usually come out? How to catch it?

Check the anus 1 ~ 3 hours after the child falls asleep. If there is a bug crawling out, you can clamp it with tweezers and put it in a small bottle filled with alcohol. Because the pinworm does not necessarily crawl out of ovulation every night, it needs continuous observation for 3 ~ 5 days.

Enterobius vermicularis (Latin name: enterbius vermicularis), whose scientific name is Enterobius, is an animal belonging to the family Enterobiidae, also known as Enterobius, Toxoplasma gondii and Nematoda, which is distributed all over the world.

Enterobius vermicularis is parasitic in ileocecum, especially in cecum, appendix, colon, rectum and lower end of ileum. When the anal sphincter relaxes after sleep, some female insects crawl out of the anus and lay eggs in the nearby skin. After laying eggs, most females die of dryness, and a few females can migrate from anus to intestinal cavity. If it enters vagina, uterus, fallopian tube, urethra or abdominal cavity, pelvic cavity and other parts, it can lead to ectopic parasitism.

Cause disease

First, it causes intestinal mucosal damage.

Enterobius vermicularis parasitic in the intestine can cause intestinal mucosal damage. Mild infection has no obvious symptoms, while severe infection can cause malnutrition and metabolic disorder.

Second, bleeding and inflammation.

Female worms occasionally infiltrate into the deep layer of intestinal wall to parasitize, causing bleeding, ulcers and even small abscesses, which are easily misdiagnosed as intestinal wall abscesses. Female insects migrate and lay eggs in anal canal, perianal region and perineum, which irritates local skin and causes anal pruritus. Scratched skin can cause secondary inflammation.

Patients often show irritability, insomnia, loss of appetite, grinding teeth at night and emaciation. Infants and young children often cry repeatedly at night and sleep restlessly. Long-term repeated infection will affect children's physical and mental health.

Three. Enterobius peritonitis and granuloma

Although pinworm is not a parasite in tissues, it is heterotopic. Besides invading the intestinal wall, it can also invade the reproductive organs, causing vaginitis, endometritis and salpingitis. If worms enter the abdominal cavity, they can lead to pinworm peritonitis and granuloma, which are often misdiagnosed as tumors and tuberculosis.

Four. Enterobius vermicularis appendicitis

Adult pinworm appendicitis is parasitic in ileocecum, and adults are easy to enter the appendix and cause inflammation. According to the pathological examination of appendectomy specimens of 13522 children with acute appendicitis, the appendicitis caused by pinworm accounted for 3.7%, and it was reported as high as 9.2%. The number of parasitic worms in the appendix varies from 1 to several, and as many as 19 1 worms have been reported. Enterobius vermicularis appendicitis is characterized by uncertain pain site and most chronic processes.

Five, pinworm urogenital inflammation

Female worms enter uterus, fallopian tube and pelvic cavity retrograde through female vagina and cervix, which can cause vulvitis, vaginitis, cervicitis, endometritis or salpingitis. It has been reported that pinworm eggs invade the endometrium and cause infertility. In China, 43 1 girl wipes the anus and around the urethral orifice with scotch tape in the morning. The results showed that the positive rates of pinworm eggs were 52.5% and 35.3% respectively.

Enterobius vermicularis can cause enuresis by stimulating urethra, and invasion of urethra and bladder can cause urinary tract infection, resulting in frequent urination, urgency and dysuria. Worms occasionally invade men's urethra, prostate and even kidneys. In addition, there are reports of asthma, lung injury and other ectopic injuries caused by pinworm infection.

Extended data

Enterobiasis is an intestinal parasitic disease characterized by pruritus of anus and perineum. It is very common all over the world, with the number of infected people ranging from 3 million to 5 million. It is also common in the north and south of China, and the infection rate of children is higher than that of adults. In particular, the infection rate of children in collective institutions is high. Domestic survey data show that the infection rate of children is 40% ~ 70%.

In families with poor sanitation, most members often get sick at the same time. Therefore, pinworm disease is a disease worthy of attention.

The principle of prevention is that treatment and prevention are carried out at the same time, and individual prevention and control are carried out at the same time.

1. It is necessary to vigorously publicize the harm, infection route and prevention significance of pinworm disease.

2. Make parents, teachers and nurses have a full understanding, educate children to develop good hygiene habits, wash their hands before meals, cut their nails frequently, and do not suck their fingers. Change underwear and bedding frequently. Collective children's units should be carefully divided and there should be a certain distance between beds.

3. Clothes, toys and utensils should be disinfected regularly. Treating the eggs with 0.5% sulfur solution for 5 minutes or with 0.05% iodine solution 1 hour can kill all the eggs. This low concentration of iodine has no irritation to human skin and is an effective and simple disinfectant.

4. The prevention of pinworm disease emphasizes the application of comprehensive control measures, so as to effectively prevent reinfection and achieve the goal of eliminating pinworm disease.

Baidu encyclopedia-pinworm

Baidu encyclopedia-pinworm disease