Any infectious agent that can cause disease is called a
The first layer of the body against pathogens is the
Causes Mad Cow Disease
A single-celled, prokaryotic microorganism
Any of a large group of nonliving, submicroscopic infective agents that typically comprise an RNA or DNA core of genetic material surrounded by a protein coat
Causes the Flu, Covid-19, common cold
Causes whooping cough, TB, strep throat
Any of various infectious proteins that are abnormal forms of normal cellular proteins
A large, eukaryotic, multicellular, parasitic worm
An example is a tapeworm that can live and feed in human intestines
Any eukaryotic protist of the phylum or subkingdom Protozoa
Examples are amoebas, algae; can cause malaria
Saprophytic and parasitic spore-producing eukaryotic organisms that lack chlorophyll
Can cause ringworm, valley fever, athletes foot
Prions
Viruses
Bacteria
Protists
Helminths
Fungi
All pathogens are living organisms
Pathogens can be visible with the naked eye or with a microscope