Tsetse Flies
Tsetse flies are often located in the sub-Saharan region of Africa and contain trypanosomes—a type of organism that’s transmitted through their bite and leads to sleeping sickness. This type of sickness is the second stage of the infection. People who have succumbed to this condition will experience insomnia at night and bouts of sleep during the day. If the condition isn’t properly treated, the person will have a few short years to live.