Lecture 7&8 Pathogenicity Flashcards

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1
Q

Define Commensalism

A

Where one pair of organism (usually the bacterium) benefits and the other is unaffected (e.g many skin bacteria)

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2
Q

Define Mutualism

A

Interdependent with both benefitting (e.g coli in the large intestine is provided with a warm and nutrient-rich environment but provides some vitamins)

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3
Q

Define Parasitic

A

Where one organism benefits and the other is affected negatively

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4
Q

Define Pathogenic

A

Disease-producing

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5
Q

Define Infection

A

Colonisation by pathogenic bacteria

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6
Q

Define Communicable

A

When it is spread from one host to another

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7
Q

Define Contagious

A

When easily spread from one host to another

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8
Q

Define Non-Communicable

A

Not transmitted between organisms (usually genetic)

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9
Q

List the 5 Requirements for Pathogenicity

A

1) Be transmitted from a reservoir
2) Enter into the body (via a portal of entry)
3) Invade target cells or organs
4) Produce molecules which deleteriously affect the host
5) Have a means of exit to transmit infection further

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10
Q

What does Biofilm do?

A

Bacteria growing on plastics obtain a substance called biofilm adds a protective outer film to the bacteria. This renders antibiotics ineffective.

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11
Q

Name the Three Reservoirs of Infection

A

1) Infected Individuals or carriers
2) Animal reservoirs
3) Non-living reservoirs e.g soil, water

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