Biology B3 - Viral, Fungal & Protist diseases

What is Measels?

a disease caused by a virus

how is measels spread

droplets from an infected person's sneeze or cough

State the symptoms of measels

-red skin rash

-fever

Can measels be serious

yes, can also be fatal if there are complications

Give an infection measels can lead to in some cases

pneumonia

How does the government try prevent high cases of measels

MMR vaccine when people are young

What is HIV?

a virus

how is HIV spread

Sexual contact, or exchange of body fluids such as blood when drug users share needles.

What are the symptoms of HIV?

Initially, flu-like symptoms

how can HIV be controlled

with antiretroviral drugs which stop the virus replicating

What cells does the virus attack

immune cells

What happens if the body develops AIDs from HIV

the body can't cope with other infections or cancers.

what is tobbaco mosaic virus?

virus that affects plants such as tomatoes

What does TMV cause?

A mosaic pattern on the leaves of the plants - parts of the leaves become discoloured

Why is parts of the leaves being discoloured bad?

discolourations means the plant can't carry out photosynthesis as well, the virus affects growth

What is rose black spot

A fungal disease

What does rose black spot cause?

Purple or black spots develop on leaves of rose plants, which often turn yellow and drop early.

Why is this bad

less photosynethesis can happen, so the plant doesn't grow very well

How is rose black spot spread

It is spread through the environment by water or 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 plants.

What is malaria?

disease caused by a protist

what vector carries malaria?

mosquitoes

How is malaria spread by mosquitoes

they pick up the malarial protist when they feed on an infected animal

-everytime a mosquito feeds on another animal it infects it by inserting the protist into the animal's blood vessel

-HM animal also = humans

What does malaria cause?

Repeating episodes of fever. It can be fatal.

How can the spread of malaria be reduced?

● Using insecticides

● Using insect nets to avoid bites

● Prevent mosquito breeding by removing stagnant

water

● Antimalarial drugs