Question

1. which species of protozoan causes the african sleeping sickness?

trypanosoma brucei gambiense
entamoeba hystolitica
plasmodium vivax
balantidium coli

Explanation:

African Sleeping Sickness (African trypanosomiasis) is caused by subspecies of Trypanosoma brucei. Trypanosoma brucei gambiense is one of the primary causative subspecies responsible for the chronic form of the disease. The other options cause different illnesses: Entamoeba histolytica causes amoebiasis, Plasmodium vivax causes malaria, and Balantidium coli causes balantidiasis.

Answer:

Trypanosoma brucei gambiense