Types of Pathogens

The descriptions of the pathogens have been taken from senecalearning.

The descriptions of the diseases have been paraphrased from the AQA GCSE Biology Specification.

Hope they're helpful!

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  • Created by: Aimee_T03
  • Created on: 02-01-19 17:16
Bacteria
Small living cells that either attack cells directly or produce toxins. They reproduce rapidly in warm and moist environments which have a good supply of oxygen. Eg. Gonorrohea, Salmonella
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Fungi
Unicellular or multicellular organisms that each have bodies made up of hyphae. The hyphae grow and are able to penetrate tissues (such as human skin). They also produce spores which can spread to other organisms, thus, infecting them as well.
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Protists
Single-celled eukaryotic organisms. Most are parasites (they live on or in other organisms). They are often transferred via a vector. Eg. Malaria (by mosquitoes)
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Viruses
Non-living pathogens which invade host cells and replicate. Once new viruses have been made, the cell bursts, thus, releasing them. It is the cell damage which makes us feel ill. Eg. HIV, TMV, Measles
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Measles
Viral disease: Symptoms of fever & red skin rash. Spread by inhaling droplets from sneezes & coughs. Serious illness which can be fatal, therefore, young children should be vaccinated against this disease.
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HIV
Viral disease: Causes flu-like illness. Unless controlled with antiretroviral drugs, the virus attacks immune cells. Spread by sexual contact or bodily fluids. Can lead to AIDS where the body's immune system cannot deal with other infections.
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TMV (Tobacco Mosaic Virus)
Viral disease: Widespread plant pathogen which affects many plant species. It gives the plant a distinctive 'mosaic' pattern of discolouration on leaves which affects growth due to lack of photosynthesis.
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Salmonella
Bacterial disease: Spread via bacteria ingested in food, or on food prepared in unhygienic conditions. Fever, cramps, vomiting, & diarrhoea are caused by the bacteria & the toxins secreted. In the UK, poultry are vaccinated to control the spread.
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Gonorrhoea
Bacterial disease: An STD with symptoms of thick yellow/green discharge from genitalia & pain when urinating. Spread can be controlled by antibiotic treatment & barrier method of contraception. Easily treatable until drug-resistant strains appeared
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Rose Black Spot
Fungal disease: Purple/black spots develop on leaves, which often turn yellow & drop early. Affects plant growth as photosynthesis is reduced. Spread via the wind & water. Treated using fungicides & removing & destroying infected leaves
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Malaria
Protist disease: The malarial protist has a life cycle that includes the mosquito. Malaria causes recurrent fever & can be fatal. The spread of malaria is controlled from preventing mosquitoes from breeding & using mosquito nets to avoid being bitten
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Other cards in this set

Card 2

Front

Unicellular or multicellular organisms that each have bodies made up of hyphae. The hyphae grow and are able to penetrate tissues (such as human skin). They also produce spores which can spread to other organisms, thus, infecting them as well.

Back

Fungi

Card 3

Front

Single-celled eukaryotic organisms. Most are parasites (they live on or in other organisms). They are often transferred via a vector. Eg. Malaria (by mosquitoes)

Back

Preview of the back of card 3

Card 4

Front

Non-living pathogens which invade host cells and replicate. Once new viruses have been made, the cell bursts, thus, releasing them. It is the cell damage which makes us feel ill. Eg. HIV, TMV, Measles

Back

Preview of the back of card 4

Card 5

Front

Viral disease: Symptoms of fever & red skin rash. Spread by inhaling droplets from sneezes & coughs. Serious illness which can be fatal, therefore, young children should be vaccinated against this disease.

Back

Preview of the back of card 5
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