Communicable disease Flashcards

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1
Q

What is a pathogen?

A

A pathogen is a micro-organism that enters the body to cause disease.

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2
Q

Name the 4 main pathogens

A

Bacteria
Virus
Protist
Fungi

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3
Q

Bacteria :

A

They are very small cells
They reproduce rapidly and release toxins (poison) into the body.
This causes damage to cells and tissues in the body, causing people to feel ill.

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4
Q

Viruses:

A

They are not cells and are very tiny.
They reproduce rapidly in the body
They live inside the cells and use the cell’s machinery to replicate themselves a lot.
The cell eventually burst to release all the new viruses
The cell damage causes people to feel ill.

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5
Q

Protists:

A

They are eukaryotes and unicellular (single-celled)
A type of protest is a parasite
A parasite is a pathogen that lives on or inside an organism and causes damage.
Parasites are transferred through vectors.

A vector is an organism that carries the protest but doesn’t get the disease itself.

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6
Q

Fungi:

A

Pathogens that have bodies with thread-like substances called hyphae
The hyphae penetrate human skin and plant surfaces
Spores are created to help the fungi spread to other organisms.

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7
Q

What are the three ways pathogens can be spread?

A

Air
Water
Direct contact

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