The simplest parasites: species, how dangerous they are, prevention

We need to start with the fact that the simplest organisms appeared a long time ago, they are considered the most ancient inhabitants of the planet. Throughout their existence, they have become incredibly resistant to various tests. They can survive even in the most dangerous environment.

These microorganisms have chosen a very convenient way of life for themselves - parasitism, especially in the human body. As mentioned earlier, these microorganisms are incredibly "harmful" and persistent, so sometimes it's so hard to get rid of them.

There are several types of parasites "residence". The first type includes endogenous microorganisms, ie those that are inside the human body. The second type includes exogenous parasites that easily "settle" on the skin and cause various skin diseases.

Types of protozoan parasites

In general, there are 4 types of parasites that "live well" in the human body.


These include giardia, trypanosomes. This class is a representative of the most ancient representatives of parasites. They got this name thanks to their organ of movement: the flagellum. The size of the parasites themselves is simply microscopic, they have a constant shape and multiply, as a rule, by dividing into two parts.

the simplest parasites of giardia in the human body

They are very dangerous to humans and animals, if they get into their bodies, they cause great harm. They also cause various diseases. Like American carotid fever, cutaneous leishmaniasis and many others. They can parasitize the intestines, blood and skin. Thus, it negatively affects human health.


This type of protozoan parasite has a very complex path of development. It is now known that the class contains approximately 1400 species. All representatives "choose" a parasitic lifestyle and are extremely dangerous to humans and animals. Reproduction occurs by cell division.

protozoan parasites

Most often, tissues and organs of a person or animal are chosen as a "place of residence. " This species causes many diseases, such as malaria and toxoplasmosis.


These include balantidia. There are about 7, 000 different species. The organs of movement of these parasites are the cilia, which are many.

protozoan parasites of balantidia

A characteristic of this type is the presence of two cores. They have a constant body shape and shell. Reproduction is usually done by division. This species is no less dangerous to humans and animals than the previous two.


These include amoeba dysentery. They are the most primitive of all species and classes. There are about 10, 000 different species! They do not have a permanent body shape. Parasitizes in humans and animals.

protozoan parasite dysentery amoeba

Most often, they choose the digestive system for their activities. Because of them, a person can experience very serious poisoning. In some cases, deaths are also common.

These species combine high resistance to various "tests". After all, an infected person is constantly trying to fight the parasites, but it does not always happen because of how well they can withstand all the measures.

Why they are dangerous, what diseases they cause

The simplest parasites are really very dangerous to human health. They can cause various diseases that lead to certain consequences. Under no circumstances should you underestimate the simplest parasites, because they can significantly harm a person.

Diseases caused by protozoan parasites:


Such a disease is characterized by certain differences. Sometimes there is relief, after which the relief is replaced by worsening of symptoms. The main symptoms are headache, fever, nausea, vomiting, convulsions.

the mosquito is a carrier of protozoan parasites and malaria

For many years, chitin has been considered the best treatment. However, there are also deaths from this disease, most often when medicine is developed at a low level.


Another no less dangerous disease, the consequences of which can also be sad. The cause is an amoeba of dysentery.

Symptoms begin to appear 7 to 10 days after infection. These include headaches, malaise, fever, and some people may have an upset stomach. This is followed by complications, which are expressed in liver problems. If the patient does not start treatment on time and does not go to a specialist, the consequences will be irreversible.


The cause of the disease is Toxoplasma gondia. Symptoms of this disease include eye damage, suffering from the nervous system as well as the cardiovascular system. Very often at first the infection is invisible, as if a common cold passes.

protozoan parasite toxoplasmosis gondii the causative agent of toxoplasmosis

Infection during pregnancy is very dangerous. Even if the child survives, it is most likely with complications and damage to the eyes or nervous system. Thus, even at the first symptoms it is necessary to consult a doctor.


It is caused by a microorganism such as balantidia. Symptoms of this disease are abdominal pain, indigestion. In some cases, fever and intoxication of the body are possible.


Leishmaniasis is considered to be the cause of this disease. Ulcers appear on the skin and mucous membranes. Swelling can often occur with mucocutaneous manifestations. Because these diseases are related to the respiratory tract, there can be deaths.

Leishmaniasis occurs mainly in hot countries. This disease is quite common and occurs in 87 countries.

As you can see, the simplest parasites are incredibly dangerous to human health, despite the simple structure of microorganisms. They can cause irreparable damage to the human body, as well as lead to certain consequences and complications.

How they are transmitted

There are 4 most common ways to become infected:

  1. Contact - household. . . This type occurs due to violation of sanitary measures or hygiene rules. Infection can occur from a variety of activities: using other people's belongings, especially personal care products, utensils, and the like. That is why it is very important to follow the rules of personal hygiene, to have your own personal hygiene products and in no case should you use someone else's.
  2. Fecal - oral. . . This type occurs as a result of contact with stool or vomiting. The simplest parasite first enters the hands or food of the "new host" and then its body.
  3. From food. . . This type occurs as a result of eating contaminated food. This can be poorly cooked fish or meat, unwashed vegetables and fruits, dairy products.
  4. Transmitted. . . This type occurs as a result of transmission from an infected object during a bite, that is, through the secretion of saliva.

How to get rid of them

After reading the article, this question certainly arises. Infections with the simplest parasites are very common, so the question of getting rid of them is extremely relevant.

As mentioned earlier, when the first symptoms of infection appear, you should consult a doctor. The specialist may prescribe certain tests and examinations. After handing them over, the doctor will make an accurate diagnosis. Then you need to start treatment urgently. Self-medication is also not recommended as it is a professional who is able to help make the correct diagnosis and prescribe appropriate treatment. In most cases, doctors resort to treatment with various drugs that help eliminate parasites and speed up human recovery.

There are many different good medicines nowadays that help with protozoan parasite infections. There is a huge variety of drugs on the market, which makes it possible to find the right one for a particular patient.


In order not to face the above problems, it is imperative to adhere to certain rules, as well as to take preventive measures.

The most effective rules are those taught by children in school. First of all, you should not forget about thorough washing of fruits and vegetables. You can also heat or trim the skin.

In addition, you can not eat raw fish, not fully cooked meat. It is mandatory to fully prepare the dish, to observe the temperature regime and the time to fully cook the product. Careless sex should be avoided. And you should also undergo regular medical checkups.