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Parasitical Worms.com The male genitalia is a small tube, the smaller part is the testes, the bigger part is the tube containing the sperm, and the last is the ejaculating tube that empties into the anus.
1. DISCRETION OF THE DISKNEY
- Adult worms are tubular, white or pink. Males are smaller than females, 15-20cm long, females 20-25 cm long.
- Tapered head, with 3 balanced lips
. The female genitals in the lower 1/3 of the torso on the abdomen.
- Genital organs: The female genitalia consists of 2 tubes, the small one is the ovary, the next is the ovary. When the oviduct comes near the genital area, the vagina concentrates into the vaginal opening.
The male genitalia is a small tube, the smaller part is the testes, the bigger part is the tube containing the sperm, and finally the ejaculation tube empties into the anus.
Other organs: Ascaris has enough organs such as digestive, circulating, excreted, nervous
. Worm eggs
1.2.1. Fertilized eggs
Eggs oval or hi round, yellow, average size 35- 50µm x 45-75 µm The outer shell is thick, the outer layer is a rough albumin layer, inside is a dark core. In addition, there may be partial peeling roundworm eggs, the outer shell is lost, only a smooth, colorless crust
1.2.2. Unfertilized eggs
Eggs oval, large size about 50 x 90 µm. The shell is more slim.
. The inner core is filled with large refractive particles. Unfertilized round Ascaris eggs may be partially peeled, the outer shell is lost and the smooth outer shell has only 2 colorless borders
Ascaris live in the digestive tract, the food is mainly the unfinished digest in anaerobic conditions.
2.2. Development cycle
- Parasitic location: Adult worms parasitize at the beginning and middle of the small intestine. If going up the stomach part, the worms' pH cannot survive, at the end of the small intestine, there is not enough nutrition to support roundworm.
- Cycle performance: Roundworm reproduces sexually. After fertilizing the female worms lay eggs. Eggs in their droppings meet favorable conditions to develop into eggs with larvae. Thanks to the thick crust, roundworm eggs last long outside.
The person who ingested the egg has the larvae into the stomach to escape the shell, the larvae penetrate into the intestinal capillaries to the mesenteric veins, to the portal vein into the liver.
The larvae follow a vein in the liver to enter the inferior vena cava to the right heart. From the non-larval heart follow the pulmonary artery to the lungs. larvae stop in the lungs 5-10 days, change the shell 2 times and grow up in the alveoli The larvae then follow the alveolar route to the trachea, to the pharynx. From there the person swallows the larvae into the intestine and develops into adult roundworm.
. Time to complete the cycle phase in the body is about 60-75 days. Life expectancy of roundworm is about 12-13 months
The greatest harm of roundworm to can be eating food because roundworm is a large round worm and the number of parasites is often high. Long-term worm infections lead to malnutrition of physical and mental development This harm is common in children. Ascarid parasitic secretes toxins such as ascaridol inhibit some digestive enzymes causing anorexia, digestive disorders, allergies. Because of the parasitic position in the small intestine, roundworm stimulates abdominal pain and digestive disorders.
.2. At the lungs
Because roundworm larvae in the body often cause hypersensitivity, especially in the lung, causing mechanical damage to alveoli and local allergic reactions that appear Loefler syndrome: patients with chest pain, Sputum with blood, X-ray film with image of pulmonary infiltrates. These signs may be confused with pulmonary tuberculosis. 33. Symptoms
- If the number of worms is high or the intestinal pH is disturbed, roundworm can cause intestinal obstruction or the worms can spread into the bile duct to the liver, causing biliary tract infection, liver abscess, appendicitis. Sometimes peritonitis, intestinal perforation caused by roundworm. - Ground round larvae larvae stray into the brain, kidneys, heart causing serious complications. - Poisoning caused by toxin of worms, especially in case of multiple infections.
4.1 Clinical diagnosis
Clinical diagnosis is difficult to determine because it is easy to get involved with other diseases except for complicated cases such as intestinal obstruction, bile duct worms
4.2. Diagnostic tests
- Stool test for eggs: This is a simple and accurate technique. Usually using the direct stool technique using physiological saline or Kato technique. Most cases do not need to be combined with a rich stool test because roundworm larvae are abundant in the stool.
Conditions of development of Ascaris eggs in external settings
Ascaris eggs are not capable of growing in the host body, the conditions of development of roundworm eggs in the outside are temperature, humidity and oxygen.
- The appropriate temperature is 24 -250C. After 12-15 days the eggs develop into larvae. Eggs are destroyed at temperatures above 600C and below -120C.
- Humidity of 80% or more is a good condition for egg development
- Oxygen is essential for the development of roundworm eggs, so eggs that stay in the water for a long time will be damaged. . Dịch vụ: Thiết kế website, quảng cáo google, đăng ký website bộ công thương uy tín
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