
Sometimes tampering can be motivated by a drug addict's desperation. In 1998, a cardiac intensive care unit in the United Arab Emirates saw an outbreak of Serratia Marcescens bacteria. Investigators traced the bacteria to vials of Fentanyl, a potent narcotic. A respiratory therapist addicted to the drug had extracted the Fentanyl for himself and replaced the liquid with water, which had been contaminated with the bacteria.