Infection and response (1)

Created by

Lorelie

Cards (62)

What are pathogens
microorganisms that cause disease
What diseases do pathogens cause
communicable diseases
What can be infected by pathogens
Plants and animals
What are bacteria
Very small cells that can reproduce rapidly inside your body
How do bacteria make you feel ill
by producing toxins that damage your cells and tissues
What are viruses
Not cells, that reproduce rapidly inside your body
What do viruses do
Replicate themselves using body cells machinery
The cell ill burst releasing the viruses
How do viruses make you feel ill
cell damage
What are protists
single celled eukaryotes
What are parasites
Protists that live in or inside other organisms and cause damage. They are transferred by a vector
How does fungi cause disease
Hyphae grow and penetrate human skin or the surface of plants
The hyphae can produce spores and spread to their animals and plants
How can pathogens be spread
Water, air and direct contact
How are pathogens spread through water
Drinking or bathing in dirty water
Cholera is transferees by drinking water contaminated with diarrhoea
How are pathogens spread in air
Droplets produced from people coughing or sneezing can be breathed in
For example influenza
How are pathogens spread by direct contact
Touching contaminated surfaces, touching shower floors or towels that the contaminated person touched
What is Measels?
A viral desease
How is measles spread?
By droplets from an infected person's sneeze or cough
What are symptoms of measles
Fever and a red skin rash
Why is measles dangerous
It can lead to pneumonia or a brain infection
How is measles prevented
Most people are vaccinated against measles when they're young
What is HIV
A virus spread by sexual contact
How is HIV spread?
Sexual contact, or exchange of body fluids such as blood when drug users share needles.
What's the initial symptoms of HIV
Flu like symptoms for a few weeks then no symptoms for years
How can HIV be controlled
Antiretroviral drugs which stop the virus replicating
What happens if HIV isn't controlled
The virus attacks immune cells and the body can't cope with other infections or cancers
What is TMV
A virus that affects many species of plants
What does TMV cause?
Discoloured mosaic patern
How does TMV effect the plant
Discolouration means the plant can't carry out photosynthesis as well and it effects its growth
What is rose black spot
A fungus
What does rose black spot cause
Purple or black spots on the leaves, the leaves can turn yellow and drop off
How does rose black spot effect the plant
Less photosynthesis can happen and it effects the growth of the plant
How does rose black spot spread?
Through the environment in water or by the wind
How can gardeners treat rose black spot?
By using fungicides and by stripping the plant of its affected leaves. These leaves then need to be destroyed so that the fungus can't spread to other rose plants.
What is malaria
A disease caused by a protist
How is malaria spread
Mosquitos are vectors
They pick up the malarial protist when they feed off and infected animal
Every time it feeds on another animal it inserts he protist into the animals blood vessels
What are symptoms of malaria
Repeating episodes of fever- it can be fatal
How can the spread of malaria be reduced
Stopping mosquitos from breeding
Using insecticides or mosquito nets
What is Salmonella
A type of bacteria that causes food poisoning
What are the symptoms of salmonella
Fever, stomach cramps, vomiting and diarrhoea
How are the symptoms caused
Toxins from the bacteria