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Description Most common cause of plague. Unlimited potential.
Special Ability Bacterial Resilience

Bacteria is a standard plague. It is the first plague available to the player. It is a very simple plague as it possesses all normal abilities, symptoms and transmissions, has no special trait and doesn't have any directly impressive special abilities. It is also the plague required to unlock the Insane Bolt achievement.

In real lifeEdit

Bacteria are good and bad. Good bacteria helps the human body, but bad bacteria (Which in this case, are the one in this game) can make people very sick, causing maladies like food poisoning, gastritis, ulcers, gonorrhea, meningitis, etc. Bacteria are the most common living thing on Earth because they have been around billions of years on Earth, as well as being the first living thing on Earth.

Special AbilityEdit

The special ability for Bacteria is Bacterial Resilience, which raises its survivability and effectiveness in all climates. Do note that while it does give a noticeable boost in effectiveness, it gives less than even the lowest tiers of Heat Resistance and Cold Resistance abilities give individually. It is also worth noting that Bacterial resilience does not give any resistance against medicines like Drug Resistance does.


Please see Bacteria Strategy Guides.

Trivia Edit

  • The Bacteria was one of the 3 plagues from Pandemic, the spiritual predecessor to Plague Inc, alongside Virus and Parasite.

Stages of Evolution Edit


Standard Plague Types


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