An organism that lives in or on another living organism (it's host), benefiting at the expense of it's host
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What is a pathogen
An organism that causes disease
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What is the immune response
A response to an antigen which involves the action of lymphocytes
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What is an antigen?
A foreign molecule that causes an immune response
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what is an antibody
A protein molecule released by the immune system in response to an antigen which can neutralise antigens
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What are the causes of AIDs
Caused by HIV - when virus is active it attacks and destroys t helper cells, lowering immunity and allowing opportunistic diseases to take advantage
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How is AIDS transmitted
Unprotected sex, blood transfusion, sharing needles, breast feeding, across the placenta
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What are the causes of malaria?
Eukaryotic organism of the genus Plasmodium (e.g. Plasmodium falcipium)
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How is malaria transmitted?
Infected human in bitten, malaria gametes are in their blood, female mosquito takes up the gametes, they develop in the mosquito and migrate to the salivary glands, when the mosquito bites a person they are transmitted to a new host
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What are the causes of TB?
Bacteria - 2 types, Myocardium tuberculosis, M. Bolis
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How is TB transmitted?
Bacteria in moisture droplets when you cough more likely in: Overcrowded spaces, poor ventilation, poor health, poor diet, homelessness
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Other cards in this set
Card 2
Front
What is a parasite?
Back
An organism that lives in or on another living organism (it's host), benefiting at the expense of it's host
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