Final answer:
Plasmodium falciparum is a sporozoan causing malaria, predominantly found in tropical regions, and transmitted by mosquitoes. Trypanosoma brucei is another sporozoan causing African trypanosomiasis and transmitted by the tsetse fly.
Step-by-step explanation:
An example of a sporozoan is Plasmodium falciparum, which is the protozoan responsible for causing malaria. Malaria is a significant disease prevalent in tropical and subtropical areas; it is transmitted to humans by the bite of infected mosquitoes. This protozoa has a complex life cycle, part of which includes residing and reproducing asexually in the human liver and red blood cells, while another stage involves reproduction in the gut of blood-feeding mosquitoes. The transmission of this disease is facilitated when mosquitoes bite humans and inject the sporozoites into the bloodstream.
Trypanosoma brucei is another example of a protozoan parasite, causing African trypanosomiasis, commonly known as African sleeping sickness. It is transmitted to humans by the tsetse fly and can be fatal if left untreated. Symptoms include confusion, lack of coordination, and difficulties with sleep.