Dickson, Daniel and Vincent solve the case of the Safari Goer With Watery Diarrhea, and explain how a microsporidian endosymbiont of Anopheles mosquitoes might impair the transmission of malaria.
The TWiP legends solve the case of Surfer Sans Septum, and discuss how two symbiotic bacteria in the tsetse fly might allow colonization with Trypanosoma brucei.
The TWiP professors solve the case of the Woman With Intracellular Ring Forms, and explore the role of Coxiella and Rickettsia endosymbionts in acquisition of Babesia by ticks.