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Health and disease (Animal disease (Treatment (Different pathogens are…
Health and disease
Animal disease
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Treatment
- Different pathogens are treated using different methods. Therefore scientists need to know the type of pathogen
2.Different transmission methods lead to different risks. Therefore the scientist needs to know the transmission method
- Knowing the symptom helps idenify target treatment and so the scientist needs to know and understand the symptoms of the disease
Health and disease
Heath- a state of physical, mental and social well-being without disease
Disease- condition affecting a body part/organ/system resulting from various causes e.g.- infection, genetic defect or environmental stress.
Communicable diseases
Non communicable
Not caused by a acute infection. They result in long term consequences and need long term treatment. e.g. diabetes, lung illnesses, cancer
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Causes of disease
Parasites
Organism that lives in or on a host organism. They take shelter and nutrients but do not give any benefit to the host.
Pathogen
Microorganisms eg. bacteria, fungus, protoctista and viruses that cause disease
Bacteria
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Modes of action
produce toxins that poison the host. Breakdown plasma membranes. Inactivate enzymes. Interfere with host cell genetic material meaning the cells cannot divide
Virus
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Invade living cells metabolism and use their genetic info to divide by inserting their DNA into the hosts DNA
Bacteriophages are viruses that infect bacteria and use them to replicate and then destroy them by bursting the cell
Protoctista
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Use vectors to transfer them to the hosts where they take over the cell and destroy it (CELL CONTENT NOT DNA)
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