Health, Disease and Infection

What does the World Health Organization define 'Health' as?
A state of complete physical, mental and social wellbeing.
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What is a communicable disease?
A disease that can be passed from one person to another.
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What is a non-communicable disease?
A disease that can't be passed between people.
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What is a pathogen and what does it do?
An organism that causes an infectious disease. They include bacteria, viruses, fungi and protists. When afew pathogens infect you they can reproduce very rapidly. Large numbers of pathogens make you ill.
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What is a bacterium and what does it do?
Bacteria are much smaller then human cells. They may release toxins (poisons) that make us feel ill. Some types of bacteria invade and destroy body cells.
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What is a virus and what does it do?
Viruses are much smaller then bacteria. Viruses take over a body cell's DNA, causing the cell to make toxins or causing dmage when new viruses are released from cells.
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What is fungi and what does it do?
Fungi are eukaryotic organsim.
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What is a protist and what does it do?
Protists are eukaryotic organisms. Many are free-living but some are pathogens.
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Name seven common infections.
Cholera, Malaria, HIV/AIDS, Tuberculosis (TB), Ebola, Stomach ulcers and Ash die-back Chalara
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What pathogen causes Cholera and what are it's symptoms?
Bacterium causes cholera. Symptom is watery, pale-coloured diarrhoea, often in large amounts.
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What pathogen causes Malaria and what are it's symptoms?
Protist causes Malaria and its symptoms are fever, wakness, chills and sweating.
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What pathogen causes HIV and AIDS and what are their symptoms?
Viruses causes HIV and AIDS. Their symptoms don't often show for a long time. Symtoms are mid-flu like and eventually repeated infections that would not be a problem if the immune system was working properly.
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What pathogen causes TB and what is it's symptoms?
Bacterium causes TB and it's symptoms are lung damage seen in blood-speckled mucus, weight loss, fever and night sweats.
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What pathogen causes Ebola and what is it's symptoms?
A virus causes Ebola. It's symptoms are internal bleeding, high fever, severe headache, muscle pain, vomiting and diarrhoea.
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What pathogen causes Stomach ulcers and what is it's symptoms?
Bacterium causes stomach ulcers and it's symptoms are inflammation in the tomach which causes pain and bleeding in the stomach.
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What pathogen causes ash die-back Chalara
Fungus causes this and symptoms are leaf loss, bark lesions and dieback of the top of the tree.
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What is a vector?
Vectors carry pathogens from one person to another. Vectors are one way that infectious diseases are spread.
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How do you prevent the spread of cholera?
Boil water before drinking it to kill the bacteria. Wash hands thoroughly after using the toilet to prevent the spread by touch.
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How do you prevent the spread of TB?
Ventillate buildings adequately to reduce the chnace of breathing in bacteria in droplets of mucus coughed out by an infected person. Diagnose infected people promptly and give antibiotics to kill TB bacteria. Isolate infected people.
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How to prevent malaria?
Prevent mosquito vectors biting people, by killing mosquitos or keeping them off the skin, e.g. by using a sleeping net.
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How to prevent stomach ulcers?
Cook food thoroughly to kill bacteria. Wash hands thoroughly before preparing food to avoid transfer.
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How to prevent Ebola?
Keep infected people isolated because the virus is easily spread. Wear fully protective clothing while working with infected people or dead bodies.
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How to prevent STI's?
Using a condom during sex. Screenig people including pregnant women. Screening blood transfusions. Supplying drug abusers with sterile needles. Treating infected people with antibiotics.
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Other cards in this set

Card 2

Front

What is a communicable disease?

Back

A disease that can be passed from one person to another.

Card 3

Front

What is a non-communicable disease?

Back

Preview of the front of card 3

Card 4

Front

What is a pathogen and what does it do?

Back

Preview of the front of card 4

Card 5

Front

What is a bacterium and what does it do?

Back

Preview of the front of card 5
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