Giárdia Lamblia: example of flagellated

Introduction - biological definition

Also known as mastigophores, flagellates form a heterogeneous group of protozoa. These unicellular microorganisms can move through the movement of their flagella.

Summary of main features of flagellates:

- have one or more scourges during one or all life cycles.

- Flagella help in feeding and also in the capture of external stimuli.

- There are species of various shapes (oval, spherical, elongated).

- Feature core surrounded by the library (rigid film).

- Most are free-living (do not parasitize any organism).

- Some flagellates have the ability to synthesize their own food, while others require food found in the environment or in the host animal.

Reproduction of flagellates

The reproduction of flagellates can be sexual (with fusion of two gametes) or asexual (mainly by bipartition).

Flagellate Examples:

- Leishmania braziliensis: parasite that causes cutaneous leishmaniasis in humans.

- Trypanosoma cruzi: human parasite that causes Chagas disease.

- Giardia lamblia: human parasite that causes giardiasis.

- Trichomonas vaginalis: parasite that causes trichomoniasis, which affects the female genital system.

- Another examples: Chlamydomonas nivalis (present in the snow), Synura uvella (lives in freshwater), Peridinium (lives in salt water).

Biological curiosity:

- Many species of flagellates act in the decomposition process of dead organic matter. Therefore, they are very important for the ecological balance of various ecosystems.

Trypanosoma cruzi: flagellated protozoan that causes Chagas disease in humans.