Diseases spread by insects or livestock are known as vector-borne diseases. They are responsible for 17% of all infectious diseases worldwide. Any insect may spread a viral or bacterial disease by infected water, fruit, or even the air. The contagious microbe is injected into the body as certain insect vectors bite. Fleas, lice, mice, squirrels, and chiggers are all responsible for typhus fever.
- Typhus fevers are rickettsial infections.
- Fleas, lice, chiggers, mice, and squirrels are all infected with these bugs.
- Scratching the bitten surface after biting opens up the skin, allowing bacteria to penetrate more easily.