Historically and Culturally:
* Rats: Famously linked to the bubonic plague ("Black Death") and other diseases.
* Bats: Carriers of rabies and other viruses, sometimes depicted as harbingers of misfortune.
* Snakes: Associated with venom and disease in many cultures.
* Flies: Carry bacteria and parasites, often associated with filth and decay.
* Worms: Represent parasites and internal illness.
Modern Symbolism:
* Viruses: Often depicted as microscopic monsters or alien invaders.
* Bacteria: Sometimes visualized as microscopic blobs or chains.
* Microbes: Frequently represented as small, abstract forms, symbolizing the unseen nature of disease.
It's important to note that associating animals with disease can perpetuate harmful stereotypes. While these animals may play a role in spreading some diseases, it's crucial to remember they are not inherently evil or synonymous with sickness.