GSCE AQA Biology Chapter 5: Communicable diseases

What are communicable diseases?

Caused by pathogens and can be passed down from one person to another

What are Measels?

A viral disease showing symptoms of a red skin tone and a fever. It can be fatal, so children are typically vaccinated against it. It is transmitted by droplets of sneezes or coughs.

What is HIV/AIDS?

Initially a flu-like illness that can be controlled by antiretroviral drugs. If this does not occur, the virus attacks the body’s immune cells, which eventually leads to AIDS, in which the body’s immune system is so damaged that it can no longer fight off any infections or cancers. It is transmitted through sexual contact and the exchange of body fluids. There is no cure for either.

What is Tobacco Mosaic Virus?

A Widespread plant pathogen that gives a mosaic pattern of discolouration, which affects plants growth due to lack of photosynthesis. It is spread by contact and vectors. There is no cure.

What is salmonella?

• bacteria ingested in food

• prepared in unhygenic conditions

• fever, vomiting, diarrhoea

• vaccination

• raw chicken kept away from uncooked food

What is Gonorrhoea

• STD

• yellow / green discharge

• penicillin

• resistance

• contraception

What is Rose Black Spot?

• Fungal

• Purple/black spots

• yellow/droop easily leaves

• reduces growth

• photosynthesis

• fungicides

• removing/destroying

What is malaria?

• mosquitoes

• fever

• can be fatal

• protists reproduction

• pregnant female mosquitoes

• circulatory system

• drugs

• nets

• insecitides

What are three skin defences?

• platelets + scabbing

• antimicrobial secretions

• micro-organisms

How does the body internally fight off pathogens?

• Phagocytes

• Antibodies

• Antitoxins