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Microbes and Diseases
Microbes are Micro-organisms
These are tiny living things that can only be seen using microscope
There are 4 main groups of microbes that are of interest to human beings, these are:
Most micro-organisms are harmless e.g.
Pathogens- are microbes that cause disease (the harmful ones)
Structure- Bacteria are made of single cells. They have:
Reproduction: Bacteria reproduce by Cell division. Once a cell is big enough, it splits in two.
How they cause disease: Most bacteria produce toxins (poisons) which make us ill.
Structure- Fungi are made of cells, from single celled yeast (unicellular) to many cells (multicellular) in Bread mould and mushrooms.
The cells have:
How they cause disease
Examples of Fungal diseases: thrush, athletes foot, ringworm
Importance of Fungi
Viruses are the tiniest microbes
They live inside living cells only
Reproduction and how they cause disease
The way viruses reproduce is the way that they use to cause disease.
The nuisance of viruses
It is hard to treat viral diseases as:
Examples of viral diseases
Chicken pox, measles, Flu, AIDS
Protozoans are single celled, water-borne micro-organisms
They mainly cause diseases that are a result of drinking dirty water.
Micro = Tiny
Organism = Living thing
Scope = to see
Bacteria living on our skin and digestive systems is called our Microflora (more like a forest of bacteria)
Our microflora helps get rid of dead cells on our skin.
Scientists also think that these bacteria in our digestive system may help with our immune system and may possibly affect how we feel (our mood?) and think. Wow!
Ribosomes are tiny particles in a cell that make proteins.
Mitochondria carry out respiration. They release energy.
1. What are antibiotics? Which of these microbes do they kill?
2. Find out about bacteria and Antibiotic resistance. Why should we be very concerned about it?