But the genes of disease-causing organisms can be altered by nature or human beings.

Vaccine: a substance that produces an immune response to a disease-causing organism.

Now I had to worry about disease-causing organisms on the loose in the lab.

This could "drastically reduce concentrations" of disease-causing organisms, the report said.

In general, hygiene mostly means practices that prevent spread of disease-causing organisms.

Boiling water will kill most types of disease-causing organisms that may be present.

Bleach will kill some, but not all, types of disease-causing organisms that may be in the water.

If so, these practices should be stopped to help determine whether a specific disease-causing organism is present.

Not only are house flies a nuisance, but they can also transport disease-causing organisms.

Then, you can boil the water for one minute to kill most disease-causing organisms.