Final answer:
Microbiologists use aseptic techniques to ensure that only the desired bacteria are cultured and that the cultures remain free from contamination. Specific laboratory rules are also followed for containment of microbial cultures for safety purposes.
Step-by-step explanation:
To ensure that accountable containers remain in a controlled environment, microbiologists use a set of strict aseptic techniques. These techniques protect cultures from contaminants in the environment and ensure that only the specific bacteria desired are cultured. In addition, specific laboratory rules must be followed for containment of microbial cultures in the laboratory. These practices are important for the safety of all involved.