Microorganisms are responsible for infectious diseases.
Some organisms can reach maturity and divide in just ten to thirty minutes.
This capacity for rapid growth underscores the importance of effective prevention and treatment measures. Types of Germs Bacteria, viruses and parasites are three types of micro-organisms, or germs, that live in the environment and inside the human body. Germs that live inside the body do not cause illness if the body can keep them in balance by limiting their growth and if they remain in the part of the body that has developed the ability to manage them. They can even be beneficial. Germs that live inside the body and normally do not cause sickness may cause illness if they get into a part of the body that is not accustomed to dealing with them.