Worms are representatives of the lower worms that live in the human body. The disease associated with the infection of a person with various types of worms is called helminthiasis. This disease is not uncommon and occurs among certain segments of the population. Children are susceptible to infection with pinworms, hunters - trichinella, fishermen, and lovers of Japanese cuisine (raw fish in the form of sushi) suffer from diphyllobothriasis. Many diseases, paradoxically, can occur in the human body due to helminth infection. To date, the theory of the relationship between cancer and parasitic infections is one of the most relevant. In the presence of helminthiasis, symptoms do not always appear, and yet, if unpleasant and uncomfortable sensations are experienced by patients with this disease, they are perceived as signs of other diseases. The patient has been treated for years for pancreatitis, gastritis or colitis, without suspecting that the cause of his ailments is helminthiasis.
How infection occurs
Worms bring a lot of trouble to a person.
Infection with helminths occurs as follows:
- through dirty hands
- in contact with the ground
- after insect bites
- by dirty hands
- Eating raw meat and fish
- After eating unwashed fruits and vegetables
- After contact with an animal
- After contact with infected people
Mature eggs of parasites can be found in soil, water, food (raw and poorly thermally processed meat or fish). Rare cases of the disease occur due to insect bites. The mechanism of infection with helminthiasis is oral-fecal. A person swallows eggs of parasites with food, water. Household contact methods of infection also occur. They occur when, after contact with the ground or sand, the hands were not washed well.
Vegetables and berries growing in the ground, which are not sufficiently washed, are also a source of infection with worms. Children who play with the garden and pets are at risk of getting infected with worms. Freely roaming pets can bring helminth eggs into the house. Flies and other insects, after contact with animal feces, sitting on food, can easily transfer helminth eggs. Surprisingly, person-to-person transmission is also possible. It happens like this: the female roundworm can crawl out of the intestines and lay eggs directly on the underwear, causing severe itching. A person, after combing in an itchy place, can come into contact with other toiletries and household items. These items fall into the hands of other family members, after which they become infected.
Infection through water is also possible. Many parasite eggs easily fall into bodies of water and open wells. Drinking unboiled well water is extremely dangerous.
Types of helminthiasis
Helminthiases differ in the way they enter the human body:
- biohelminths
- geohelminths
- contagious
Biohelminths are transmitted to humans through contact with animals. Geohelminth can be infected through the soil. Contagious arise from contact with an infected person. The disease manifests itself differently depending on the method of infection, the number of worms, the degree of their adaptation in any human organ.
Helminthiasis stages
The most destructive effect on the organism is not produced by adults, but by their larvae. Adult individuals have already chosen a cozy place for themselves in the human body, and the larva travels through the organs, leaving its lesions behind. The most common habitat for parasites is the gastrointestinal tract. Different types of parasites prefer different habitats. So, roundworms settle in the small intestine, and pinworms settle in the large intestine and the lower parts of the small intestine. According to the habitat of the parasites, helminthiases are:
- translucent
- cloth
Translucent ones are located in the lumens of the genital organs and tissue, within the tissues. Depending on the growth, the parasites can change their habitat, passing from the translucent to the tissue form. Helminthiasis develops in two stages:
- sharp
- Chronic
The acute stage lasts from a week to a month, and the chronic stage continues until it heals. The acute stage begins with the introduction of the egg and continues as the parasite matures and grows. The disease is manifested by allergic reactions to a foreign organism. During the chronic stage of the disease, various reactions of the body occur. During this period, the parasite moves through the body in search of refuge. The disease is accompanied by disturbances in the functioning of the organs and systems of the human body. Having integrated into the immune system of the human body, parasites consume the substances necessary for their growth and development. This leads to metabolic disorders, disorders of the digestive system, difficulty in the absorption of vitamins and minerals.
In addition to this damage, parasites throw their waste products into the human body, poisoning it and causing intestinal disorders, reduced immunity and the development of bacterial infections. Parasites contribute to the risk of developing cancer. This happens due to the negative impact on the immune system and stimulating the process of cell division. Often a patient is examined by many specialists who find a lot of diseases in him. And in this case, only one doctor - a parasitologist - can replace all the specialists.
Classification of helminths
roundworms are quite common
Types of worms in humans:
- flatworms
- round worms
Flatworms include:
- Trematodes (opisthorchis, schistosomes, paragonim)
- Cestodes (broad tapeworm, tapeworm, echinococcus, alveococcus)
- Roundworms or nematodes:
- roundworm
- Ascaris
- hookworm
- Trichinella
Such a classification of helminths is presented in the medical literature. In order to successfully solve such a problem as helminthiasis, it is necessary to find a detailed description of the structure and life cycle of parasites.
flukes
Another name for trematodes is flukes. These parasites are flat, leaf-shaped or lanceolate with two suckers. One sucker is in the mouth, and the second, which serves for fixation, is in the peritoneum. All trematode representatives enter the body through an intermediate host. These parasites are mostly hermaphrodites.
opisthorchisis
This trematode is a worm up to 1. 3 cm long with two suckers. Opisthorchis is a hermaphrodite, parasitizing the liver, gallbladder, pancreas in humans and in some predatory animals (foxes, dogs, cats). Opisthorchiasis eggs pass out of the human or animal body with feces. When they enter the reservoir, these eggs are swallowed by freshwater mollusks, within which the larvae hatch and develop. The process of development and maturation of the larvae lasts two months. The larvae then break out of the mollusk and burrow under the skin to form carp fish. After six weeks, the larvae develop into full-fledged mature parasites. Opisthorchis enters the body of an animal or person after eating infected fish. This worm can live in a living organism for up to 20 years. Symptoms of opisthorchiasis:
- Allergy
- Weakness
- Headache
- Dizziness
- Depression
- Loss of consciousness
The damage caused to the body by opisthorchiasis:
- Poisoning by the parasite's waste products.
- Liver tissue damage
- gallbladder injury
- Violation of the outflow of bile.
- inflammation of the pancreas
- secretory dysfunctions
- Decreased stomach motility
- Thickening of the walls of some organs, resulting in the appearance of tumors.
The chronic course of the disease is characterized by:
- heaviness after eating
- efforts
- threw up
- Nausea
Opisthorchis habitats in rivers rich in fish:
- kame
- Dnipro
- Neman Delta
Prevention of infection: To avoid opisthorchiasis infection, do not eat raw fish. Larvae die during heat treatment of products. Dried fish can only be eaten if it has been previously salted. Also, the larvae die when the fish is frozen for a long time.
schistosomes
These parasites are of different sexes, they are needle-shaped from 0. 4 to 2. 6 cm long, the females are longer than the males and larger in size, they produce 3000 eggs per day. The method of reproduction, as in the previous species of parasites, is through freshwater molluscs. The larva enters the human body through the skin and mucous membranes while swimming in a freshwater reservoir. It can also enter the body of a person who accidentally swallowed water while swimming. After a day after penetration, the larva turns into an adult and enters the peripheral veins, through which it goes to the lungs and venous vessels. There, the schistosome reaches sexual maturity.
Schistosoma lays eggs in the intestines, mucous membranes, the bladder. Then the eggs are excreted from the human body with urine or feces and begin the path of development again. Schistosoma lives in the human body for several decades, causing damage and infecting new individuals. The problems that arose during infection with schistosome, the human body is no longer caused by adults, but by their eggs. Only half of the eggs are excreted from the body, the rest accumulate in the organs. The eggs of this parasite have spikes that damage the internal organs of a person, ulcers often occur in those infected. Patients with schistosomiasis experience the following symptoms:
- appetite disorder
- Anemia
- enlarged liver
- altered spleen
- Decreased intestinal peristalsis
- Stomach ache
- constipation
- Diarrhea
- Weightloss
- intestinal bleeding
- pain when urinating
- allergies
- Weakness
When the genitourinary system is infected, patients experience:
- Menstrual irregularities and miscarriages in women
- Impotence and incomplete ejaculation in men
When the eggs enter the central nervous system:
- acute cerebral schistosomiasis
- chronic brain damage
- fatal outcome
Infected children experience delayed growth and development, decreased school performance. Disease prevention includes avoiding swimming and avoiding walking barefoot in tropical waters.
paragon
Paragonim is a 1 cm long lung fluke with an ovoid body and red spines. This parasite multiplies in the lungs of animals and enters the human body by eating crayfish, freshwater crabs. The parasite infects the respiratory system. For patients with paragonimiasis, allergic reactions and decreased immunity are characteristic. Symptoms:
- Temperature increase
- Cough
- Excretion of sputum from the lungs when coughing.
- Dyspnoea
- In severe cases, blood and parasite eggs are present in the sputum.
- In the patient's lungs, wheezing is clearly audible.
- Prevention: exclude the use of raw crayfish and crabs.
cestodes
Representatives of cestodes are tapeworms of various lengths. Some parasites reach gigantic sizes. On the head of these parasites there are suckers, hooks or sucking grooves. These adaptations are necessary for the parasites to adhere to the walls of the intestine. Tapeworms affect the entire human body, they are most dangerous for children who quickly develop anemia.
echinococcus
These parasites reach a length of 5 cm and are the causative agents of Echinococcus disease. A multi-chambered representative of this type of worm is the causative agent of such a disease as alveococcosis. The disease is transmitted by livestock and domestic animals. When caring for these animals, the eggs of the parasite fall from their fur into the hands of people. Entering the human intestine, parasites bite into the mucous membrane. As the parasite matures, 4 sections appear, the last of which is filled with eggs. These departments break off and spread throughout the body, infecting it. The fourth section spreads the eggs throughout the body.
An infected organ in a patient increases, for example, the liver. Suppuration may form. An enlarged organ can even go through the abdominal cavity. And this can lead to serious sepsis of the body and even death. Symptoms:
- Weakness
- Dizziness
- Allergic reactions to the waste products of parasites.
Echinococcus affects:
- Brain
- Spinal cord
- Eyes
- thyroid gland
- Liver
- Lungs
- uterus
This parasite can cause the formation of tumors, even malignant. The most unpleasant thing is that the treatment of this disease is possible only surgically. Prevention: personal hygiene in contact with animals.
nematodes
These worms with elongated, round or cylinder-shaped bodies parasitize, most often, in the body of children. These roundworms include pinworms, roundworms, hookworms.
Intestinal worms
These are little white worms. The length of the female is 1 cm, the male 0. 5 cm. These parasites have a pointed tail, for which they were called pinworms. The habitat of pinworms is the human intestine. The front end of the parasite has a sucker, with the help of which the pinworm pierces the intestines, and the sharp end hangs down into the light and damages the walls. This disease is called enterobiasis. You can get infected from a person through dirty hands. There is a disease in preschool children attending kindergarten. A symptom of pinworm infection is itching around the anus. More often, itching is felt at night, when the female lays eggs, while she releases a special substance. Symptoms:
- itching
- Diarrhea
- Stomach ache
- Headache
- Lack of appetite
- Prevention
- handwashing
round worm
These worms are the largest. The length of the female is up to 0. 5 m. The female lays 200 thousand eggs a year, regardless of the male. The mechanism of infection is fecal-oral. Ascaris eggs enter the human body along with unwashed vegetables and fruits through dirty hands. The larva that has entered the intestine is selected from the shell and penetrates the walls of the intestine, while migrating through the intestinal veins to the liver, through the hepatic veins to the heart, through the pulmonary arteries to the bronchi, then to the trachea and in mouth. A partial number of larvae dies in the open air, the rest are swallowed upside down. Symptoms:
- Nausea
- Threw up
- Jaundice
- pancreatitis
- Frequent acute respiratory infections
- Bronchitis
- Pneumonia
Prevention:
- handwashing
- Vegetable and fruit washing.
- Personal hygiene
- Protect food from flies, cockroaches and other hawkers.
In conclusion, we can say that the cause of the disease is not always bacteria and viruses that have entered the body. Parasites can cause great harm to human health. In case of unclear symptoms, it is not necessary to exclude the penetration of the parasite into the body, the patient should visit a parasitologist.