Insects as Carriers of Disease

Insects as Carriers of Disease is a 1945 Disney animated short film. It is a non-theatrical governmental short produced for the Coordinator of Inter-American Affairs.

Synopsis
Careless Charlie is shrunk to the size of an insect to learn to his horror how household pests such as flies, mosquitoes, and lice are not "basically harmless" as he thought, but really monsters which carry dangerous diseases, which cleanliness of food, body, and living conditions can prevent.