After returning from a trip to Africa, Tom feels tired and weak and has severe anemia.A blood smear reveals a protozoan in his blood and the health care provider diagnoses malaria.Which of the following could be the causative agent of this disease?

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Malaria is a parasitic disease caused by the Plasmodium species, which are transmitted to humans via the bite of infected Anopheles mosquitoes. Plasmodium vivax is one of the four species of Plasmodium that commonly cause malaria in humans. Giardia lamblia is a protozoan that causes gastrointestinal symptoms, not malaria. Trichophyton rubrum is a fungus that causes skin infections. Taenia solium is a tapeworm that causes pork tapeworm infection. HIV is a virus that attacks the immune system and causes AIDS, but it is not responsible for causing malaria.

After Returning from a Trip to Africa, Tom Feels Tired