Definition:

A disease that is spread from one living organism to another or through the environment.

communicable diseases

VIRUSES

A piece of genetic material surrounded by a protein coat

ANTIBIOTICS: NO

BACTERIA

Single-celled microorganisms

TOXINS in diseases

ANTIBIOTICS: YES**

HOW THEY DEVELOP

FUNGI

Plantlike - diseases in lungs, mucus membrane, and skin

1: PATHOGENS enter the body

2: INFECTION results