Question

What is the difference between pathogenic and non-pathogenic bacteria?

Answer 1

Microorganisms are present everywhere in the Biosphere. There are two types of Harmful and Beneficial bacteria present in the environment. The distinction between the two bacteria is based on the Koch postulates.

Complete answer:
The Pathogenic bacteria is a biological agent that causes disease to the host. They are often referred to as Infectious agents, so they have a capability to invade inside the host cells. Non- pathogenic bacteria inhabit the gut environment. These microbes are referred to as gut flora, they live outside the body cells.
Let us discuss the difference between the two types of bacteria.

PATHOGENIC BACTERIA:	NON-PATHOGENIC BACTERIA:
Pathogenic bacteria play an important role in spreading disease. Example: Streptococcus.	The Non- pathogenic bacteria are non -disease causing agents. Example: Lactobacillus.
They spread through air, water, soil, food, and through physical contact.	Non pathogenic Bacteria are used in manufacturing of foods, Antibiotics, probiotics, and fermented foods and bio fertilizers.
The pathogenic microorganisms are Versatile and they are found in a wide range of environments (Soil, water, hospitals, sewage, plants, animals and humans).They are Harmful to humans and they cause disease under certain conditions (skin via cut).	They live on the surface of animals as normal flora. hey survive through Symbiotic Relationship with host and provide various benefits to human body.
It has an ability to produce toxins, immunosuppression to host, and cause disease to an organism.	They do not produce any toxins.

Note:
The pathogenicity of Microorganism is referred to as disease-causing ability of microorganism. The measure of pathogenicity of bacteria is known as Virulence. Bacteria can be Virulent or Avirulent. Virulent Bacteria are able infect the host cells whereas Avirulent bacteria protect from the harmful organism.