20 Questions
What is the mode of transmission for Giardia duodenalis?
Fecal-oral transmission
What is the resistant form of Giardia responsible for transmission?
Cyst with 4 nuclei and flagella
What is the therapy of choice for the treatment of giardiasis?
Metronidazole
What is the primary mode of transmission for Trichomonas vaginalis?
Sexual intercourse
What is the form in which Trichomonas vaginalis exists?
Trophozoite with 1 nucleus and 4 flagella
What is the size range of protozoa?
2 – 100 µm
Which type of reproduction involves multiple splitting?
Schizogony
In which form do many protozoa develop under harsh environmental conditions?
Cyst form
What is the characteristic of an indirect life cycle of a parasite?
Develops necessarily in 2 or more hosts belonging to different species
Which pathogenic mechanism do many parasites have to invade the human host?
Penetrate the anatomic barriers, attach to specific host cells or organs, avoid immune detection, replicate, and produce toxic substances
What is the typical size range of protozoa?
50 - 200 µm
Which type of protozoa lives in host cells, at least in some stages?
Intracellular protozoa
What is the primary mode of transmission for Trypanosomes?
Vector-borne
In which form do many protozoa develop under harsh environmental conditions?
Cyst form
What is the pathogenic mechanism of many parasites to invade the human host?
Producing toxins that destroy tissue
What is the primary mode of transmission for Giardia duodenalis?
Fecal-oral transmission
What is the characteristic of the trophozoite form of Giardia duodenalis?
Pear-shaped with 2 nuclei and 8 flagella
What is the therapy of choice for the treatment of Trichomonas vaginalis?
Metronidazole
What clinical syndromes are associated with chronic giardiasis?
Weight loss and alternating diarrhea/constipation
Which diagnostic method is NOT used for the detection of Giardia duodenalis?
Serological testing
Test your knowledge of the general characteristics of protozoa including their unicellular nature, variable body shape and size, organelles, and reproduction methods. Explore the different types of protozoa and their medical significance.
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