Pathogen Definition

Pathogens are referred to any tiny organism, like virus or bacterium that can cause diseases in a host.

A pathogen is simply defined as a tiny living organism that is a carrier of diseases in a host. Pathogens need a host body for surviving and when it enters a host, it avoids the immune responses of the host. Instead, the pathogen utilizes the host body’s resources to replicate before exiting and spreading to a new host.

Pathogens have different types and can transmit through skin contact, body fluids, contact with contaminated faeces, airborne particles, and contact with the surface touched by an infected person. The most common types of pathogens are viruses, bacteria, fungi and parasites.

Diseases caused due to pathogens vary depending on the type of pathogen. For example, diseases caused by virus pathogens include common cold, yellow fever, flu, dengue fever etc.

Similarly, the diseases caused by bacteria pathogens are Urinary Tract Infection (UTI), tuberculosis, gonorrhoea etc. The diseases caused by fungi pathogens are thrush, ringworm etc.

Main article: What are Pathogens? An Overview of Pathogens and their Types

Frequently Asked Questions on Pathogen Definition

Define pathogen.

Pathogens are defined as any tiny organism that can cause disease in a host.

What are the five main pathogens?

The five primary types of pathogens are viruses, bacteria, fungi, protozoa and worms.

Further Reading:

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