B3 Pathogens and disease- 1 (Viral Disease (Viruses reproduce rapidly in…
B3 Pathogens and disease- 1
Pathogens and Deseases
They Damage cells and produce toxins which damage tissues
Salmonella= Food Poisoning in uncooked food and dirty
Secreted Toxins Cause Fever, cramps and diarrhoea
Chicken and can contain the bacteria therefore chickens in the uk are vaccinated
Gonorrhoea= is an STD caused by bacteria
Spread by sexual contact
Symps are Thick yellow or green from the vagina or penis
Used to be treated with penicillin, but many resistant strains have now appeared and can be reduced by Barrier method
Protists and Disease
Protists are single celled organisms but eukaryotic
Malaria is caused by a protist
The protist uses a mosquito as a vector
Passed when a person is bitten by mosquito
Causes severe fever, reoccurs and can be fatal
To prevent getting infected try not to get bitten
Rose Black Spot
Spread when spores are carried by the wind from plant 2 plant
Purple or black spots dvlp on leaves, which turn yellow and drop
The loss of leaves will stunt growth of the plant as photosynthesis is reduced
Can be treated by using fungicides and KO affected leaves
Measles- Caused by a virus.
Symps= Fever and Red Skin rash
Spread BY= by breathing in droplets from sneezes and coughs
Can be fatal therefore most children's get vaccinated.
HIV(Human immunodeficiency virus) causes aids
Spreads BY= Sexual Contact or exchange of body fluids
Symps= Flu-like illness at start, if untreated it attacks the bodys immune cells
can delay this by taking antiviral drugs
Late Stage HIV/AIDS is when KO immune system and other infections cannot be fought off.
Tobacco mosaic virus(TMV)= occurs in tobacco plants and many other species such as Tomatoes.
Mosaic pattern decreases the chlorophyll content on the leaves
It therefore affects photosynthesis and plant growth
Viruses reproduce rapidly in body cells causing damage to cells
Pathogens and Disease
Pathogens are microorganisms.
Can infect Plants and Animals
They can spread by direct contact, water or air, and vectors
Vectors are organisms that carry the disease but do not get infected and they can pass it on to others.
Spread can be reduced by- simple hygiene, KO vectors, isolating infected individuals and vaccination to who are at risk.