B1.1.2

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  • Created by: 12bj7709
  • Created on: 13-07-15 15:18
Pathogens
A mirco-organism which causes infectious disease
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Bacteria
May reproduce rapidly and release harmful toxins
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Virus
May reproduce rapidy, takes over normal human cells
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A wite blood cell can help defend against disease by...
*ingesting the pathogen *producing antibodies *producing antitoxins
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The immune system
Produces specific antibodies to kill a particular pathogen, this can lead to immunity from certain pathogens.
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Semmelweis
Recognised the importance of hand-washing and prevention of the spreading of infectious disease
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Some medicines eg. Painkillers help to...
relieve the symptoms of infectious disease but do not kill the pathogen.
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Anitbiotics eg. penicilin
help to cure bacterial disease by killing the infectious bacteria within the body. Each infection need its own antibiotics.
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Strains of bacteria eg. MRSA have...
become resistant to antibiotics due to natural selection, others become resistant due to over use.
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Mutations of pathogens can produce...
new strains of the pathogen which means the antibiotics and vaccinations may not be effective any more.
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New strains of disiese...
will spread quicker because no one is immune or cured.
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Antibiotics can only kill...
the infecious pathogens of the non-resistant strain. however, this increases the population of the resistant strain because they survive and reproduce.
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Mild Infections are not treated by antibiotics because...
it can increase the population of the resistasnt pathogen.
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Vaccines work by...
entering a small amount of the chosen dead or inactive pathogen.This allows the white blood cells to produce anbtibodies to defend against this disease. Then, if the person comes into contact with the real disease, antibodies can be produced rapdly
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Uncontaminated micro-organisms are...
required for investigating the effects of disinfectants and antibiotics.
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Cultures need to include...
*sterile petri dishes and media cultures *sterile innoculating loops, by passing them through a flame * lid of the petri dish secured with adhesive tape
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Temperature of culture inncubator
25 degrees celcius in schools and much higher in industrial use
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Other cards in this set

Card 2

Front

May reproduce rapidly and release harmful toxins

Back

Bacteria

Card 3

Front

May reproduce rapidy, takes over normal human cells

Back

Preview of the back of card 3

Card 4

Front

*ingesting the pathogen *producing antibodies *producing antitoxins

Back

Preview of the back of card 4

Card 5

Front

Produces specific antibodies to kill a particular pathogen, this can lead to immunity from certain pathogens.

Back

Preview of the back of card 5
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