Pathogenic microorganism definition

Pathogenic microorganism means water borne pathogens as determined by the director to be either a:
Pathogenic microorganism means any harmful microorganism to human, animal and plant health, without prejudice to this definition, any microorganism that causes devastating to other beneficial microorganism is also included.
Pathogenic microorganism means a microorganism that causes disease in a human being, animal or plant; the term shall also include a microorganism that destroys a useful microorganism, by whatever means;