You are the doctor and are searching for the cure to help your patients fight of the deadly infection.  Bacteria will enter your screen from the left every 25 seconds and they are aiming to infect your patient.  Do not let too many bacteria go untreated or your patient will die.  In the Bacteria Tower Defense flash game you need to build a maze of antibiotic towers to slow and kill the dangerous bacteria.  Earn money to make upgrades to your towers.