Communicable Diseases (fact)

Question 1

FACT on measles

Answer 1

A disease caused by a virus
Symptoms: fever, red skin rash
Spread: air-born (droplets)
Prevention: vaccination of early childhood

Question 2

FACT on AIDS

Answer 2

disease caused by HIV virus
Symptoms: flu like symptoms, attacks immune cells to the point they cant fight
Spread: STD or exchange of bodily fluids
Prevention: antiretroviral drugs control it

Question 3

FACT on Tobacco mosaic virus (TMV) - plant disease

Answer 3

Disease caused by virus
Symptoms: Mosaic pattern of discolouring on leave (effect photosynthesis and growth)
Spread: contact between plants or contaminated tools
Prevention: removing infected plants, disinfecting tools and TMV resistance crops

Question 4

FACT on Salmonella

Answer 4

Disease caused by a bacteria
Symptoms: food poisoning, fever, cramps
Spread: food in unhygienic conditions
Prevention: vaccination to control spread

Question 5

FACT on Gonorrhoea

Answer 5

Disease caused by Bacteria
Symptoms: Thick yellow/green discharge from genitals, pain when urinating
Spread: STD
Prevention: penicillin (antibiotic)

Question 6

FACT on Rose black spot

Answer 6

Disease caused by Fungi
Symptoms: purple/black spots developing on plant, effects photosynthesis
Spread: water, wind
Prevention: fungicides

Question 7

FACT on Maleria

Answer 7

Disease spread by Protist
Symptoms: recurrent fever, can be fatal
Spread: vector - mosquitos
Prevention: vector prevention (nets) or prevention of breeding

Question 8

Scientists produce a TMV resistance gene. Suggest how scientists can use this plant to produce many plants with the same gene

Answer 8

By taking cuttings from the plant (such as a stem or leaf) scientists can grow a new identical plant

Question 9

Explain why a plant with TVM might have stunted growth

Answer 9

Plants with TMV have leaf discolouration. This means that the chlorophyll cannot take in the light from the sun effectively which will lead to a lack of photosynthesis taking place. As plants use photosynthesis to convert sunlight, water, and carbon dioxide into glucose and oxygen, which provide energy for growth, these essential functions cannot be carried out. This means that the plant does not have sufficient nutrients to grow efficiently which is why it will have stunted growth

Question 10

How can we prevent vectors from spreading illness apart from netw

Answer 10

Destroying still water pond
Repellants
Not going out in evening

Question 11

How does Salmonella cause symptoms of vomiting and diarrhoea

Answer 11

Reproduce in large amounts so the body cant destroy them all so they are forced to release