Unit 20
1.1 Identify the differences between bacteria, viruses, fungi and parasites
1.2 Identify common illnesses and infections caused by bacteria, viruses,
Fungi and parasites
1.3 Describe what is meant by ‘infection’ and ‘colonisation’
1.4 Explain what is meant by ‘systemic infection’ and ‘localised infection’
1.5 Identify poor practices that may lead to the spread of infection
2.1 Explain the conditions needed for the growth of micro-organisms
2.2 Explain the ways an infective agent might enter the body
2.3 Identify common sources of infection
2.4 Explain how infective agents can be transmitted to a person
2.5 Identify the key factors that will make it more likely that infection will
Occur
1; 1 the difference between bacteria, viruses, fungi and parasites are: Viruses are coated genetic material that invade cells and use the cell's apparatus for reproduction. Bacteria are single celled organisms. Some classify them as a separate (fourth) kingdom Bacteria are single celled organisms. Some classify them as a separate (fourth) kingdom on the tree of life.
Fungi are multi-celled organisms that form a third Kingdom of life, along with the plant kingdom and the animal kingdom.
Parasites are plants or animals that derive benefit from the metabolism of other plants or animals at the expense of the host and without providing some benefit to the host in return.
Bacteria is found in ever were and is able to adapt to its environment there is around 40 million bacteria in a gram of soil an d can live in either a symbiotic or parasitic relationship , and the human body controls bacteria by the use of anti-bodies in the blood system which makes the majority of bacteria harmless to use .
A virus is a small infectious agent that replicates only inside the living cells of other organisms. Viruses can infect all types of life forms, from animals and plants to microorganisms, including bacteria and archaea
Fungi can be single celled or very complex...