What causes African sleeping sickness and giardiasis?

African sleeping sickness:

African sleeping sickness is caused by a parasite called Trypanosoma brucei. It is transmitted by the bite of an infected tsetse fly. Tsetse flies are found in sub-Saharan Africa. The parasite enters the bloodstream and multiplies. It can cause fever, headaches, fatigue, and weakness. If untreated, it can lead to coma and death.

Giardiasis:

Giardiasis is caused by a microscopic parasite called Giardia intestinalis. It is found in contaminated water or food. The parasite can cause diarrhea, abdominal cramps, bloating, and gas. It can also cause weight loss and malnutrition. Giardiasis is usually spread by drinking contaminated water or eating contaminated food. It can also be spread through contact with an infected person or animal.