Georgia Virtual School (GAVS) Health Practice Exam

The illnesses mentioned—malaria, African sleeping sickness, and trichomoniasis—are indeed caused by protozoa, which are single-celled organisms classified in the kingdom Protista. Each of these diseases is caused by a specific type of protozoan parasite.

Malaria is primarily caused by Plasmodium species, which are transmitted to humans through the bites of infected Anopheles mosquitoes. African sleeping sickness, or trypanosomiasis, is caused by the Trypanosoma brucei parasite, which is spread by the tsetse fly. Trichomoniasis, on the other hand, is caused by Trichomonas vaginalis and is spread through sexual contact.

Protozoa are known for their ability to multiply within a host, which can lead to significant health issues. They often have complex life cycles that can involve multiple hosts and transmission methods, further highlighting their distinct role as pathogens in causing the diseases listed.

In contrast, bacteria, viruses, and fungi are other types of pathogens that cause different diseases but do not encompass these specific illnesses. Each group of pathogens has unique characteristics, modes of transmission, and forms of treatment, making it essential to correctly identify them for effective management and prevention.