Most common cause of plague. Unlimited potential.

Plague Type:


Special Ability:

Bacterial Resilience

Release date:

May 23, 2012, Version 1.0

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. It is also the plague required to unlock the Insane Bolt achievement.

In real lifeEdit

Bacteria can be helpful or cause harm. The good bacteria help the human body in a multitude of ways, but the dangerous ones (which in this case, are the one in this game) can make people very sick, causing maladies such as food poisoning, gastritis, ulcers, gonorrhoea, botulism, meningitis, etc. Most bacteria (but not viruses that mutate all the time) can be killed by antibiotics which interfere with its life processes, but some bacteria can obtain DNA that makes it antibiotic-resistant.

Bacteria were among the first life forms to appear on Earth, and are present in most of its organisms and habitats.

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