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WHAT IS DISEASE?




Single factor diseases ­ single cause such as an infective agent e.g. malaria

Multifactorial diseases ­ cardiovascular disease that has many causes, depend on lifestyle

Communicable diseases ­ are infectious and caused by infection with another organism such as bacteria,
viruses and fungi. Can be passed from…

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WHAT IS DISEASE?




and foreign particles), stomach acid (pH 12 destroys most bacteria and toxins due to acid from gastric
glands), bladder and skin.

The immune system:

nonspecific response: present from birth, effective against specific pathogens
specific response: slow, only effective against specific pathogens, response faster after reinfection
white blood…

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WHAT IS DISEASE?




antigens. These do not correspond to memory cells from any previous infections, the body reacts to the
organism as though it is a new infection and produces a primary response = slower, symptoms develop

Antibodies proteins synthesised by B cells, they react and bind with them precisely…

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WHAT IS DISEASE?












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