Multicellular, eukaryotic animals.  They generally possess digestive, circulatory, nervous, excretory, and reproductive systems.

Single-celled prokaryotic organisms that do not contain a nucleus and lack membrane-enclosed intracellular structures

Eukaryotic, single-celled microscopic organisms.  They possess at least one nucleus and numerous intracellular structures.

Eukaryotic organisms that possess a nucleus and intracellular structures.  They are important for the decomposition of organic matter.

Acellular entities that are composed of a nucleic acid and a few proteins.  They are very small and can't be seen with a light microscope.

Multicellular, eukaryotic animals.  They generally possess digestive, circulatory, nervous, excretory, and reproductive systems.

Single-celled prokaryotic organisms that do not contain a nucleus and lack membrane-enclosed intracellular structures

Eukaryotic, single-celled microscopic organisms.  They possess at least one nucleus and numerous intracellular structures.

Eukaryotic organisms that possess a nucleus and intracellular structures.  They are important for the decomposition of organic matter.

Acellular entities that are composed of a nucleic acid and a few proteins.  They are very small and can't be seen with a light microscope.

Multicellular, eukaryotic animals.  They generally possess digestive, circulatory, nervous, excretory, and reproductive systems.

Single-celled prokaryotic organisms that do not contain a nucleus and lack membrane-enclosed intracellular structures

Eukaryotic, single-celled microscopic organisms.  They possess at least one nucleus and numerous intracellular structures.

Eukaryotic organisms that possess a nucleus and intracellular structures.  They are important for the decomposition of organic matter.

Acellular entities that are composed of a nucleic acid and a few proteins.  They are very small and can't be seen with a light microscope.

incubation period

illness period

prodromal stage

convalescence

virulence refers to the overall ability of a microbe to cause disease, whereas pathogenicity refers to the ability of one microbe to cause disease relative to another

virulence only refers to pathogens, whereas pathogenicity refers to any microbe that can cause an infection

pathogenicity refers to the overall ability of a microbe to cause disease, whereas virulence refers to the ability of one microbe to cause disease relative to another

pathogenicity only refers to pathogens, whereas virulence refers to any microbe that can cause an infection

A virulence factor

the ability of a microorganism to establish infection

A measure of the degree of severity of a disease

A microorganism's ability to cause disease

The competitive relationship between two microorganisms

Any change from the general state of good health that is caused by microorganisms or their products

Any change from the general state of good health

The invasion or colonisation of the body by pathogenic microorganisms

A measure of the degree of severity of a disease

Any change from the general state of good health that is caused by a microorganism

Any change from the general state of good health

The invasion or colonisation of the body by pathogenic microorganisms