Communicable (infectious) disease Flashcards Preview

B6a GCSE Communicable disease > Communicable (infectious) disease > Flashcards

Flashcards in Communicable (infectious) disease Deck (36)
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1

What is a pathogen?

A microorganism that causes infectious disease

2

Name two diseases caused by bacteria

Gonorrhoea
Salmonella

3

Give the symptoms of Gonorrhoea

Thick yellow or green discharge from vagina or penis
Pain on urination

4

How is Gonorrhoea treated?

Antibiotics eg penicillin

5

How can the spread of gonorrhoea be reduced?

Use barrier methods of contraception eg condom

6

Give the symptoms of salmonella

Fever
Abdominal cramps
Vomiting
Diarrhoea

7

How do bacteria make you ill?

Damage cells
Produce toxins

8

How can you get infected by salmonella?

Spread by bacteria in food, especially chicken

9

How can the spread of salmonella be reduced?

Cook food to a high temperature - kills bacteria
Good hygiene eg wash hands/surfaces before preparing food
Vaccinate poultry against salmonella

10

Name the disease caused by salmonella

Food poisoning

11

Name the type of pathogen that causes rose black spot

Fungi

12

What are the symptoms of rose black spot?

Purple or black spots on leaves
Leaves turn yellow and drop off

13

How is rose black spot spread from plant to plant?

Water
Wind

14

How can rose black spot be treated?

Fungicides - kill fungi
Remove and destroy affected leaves

15

Why does rose black spot affect the plant?

Reduces photosynthesis
As less chlorophyll in leaves
Reduces amount of glucose made
Reduces growth of plant

16

Name three disease caused by viruses

Measles
HIV/AIDS
Tobacco mosaic disease

17

What are the symptoms of measles?

Fever
Red skin rash
Can be fatal

18

How is measles spread from person to person?

Inhalation of droplets from sneezes and coughs

19

How can the number of people who are infected be reduced?

Vaccination
Isolation of those infected

20

What are the symptoms of HIV/AIDS?

Flu like symptoms

21

Which cells do HIV viruses attack?

White blood cells

22

How is HIV transmitted between people?

Sexual contact
Exchange of body fluids eg used needles for injecting drugs

23

How can HIV be treated?

Antiretroviral drugs

24

What are the symptoms of tobacco mosaic virus (TMV)?

Decolouration of leaves (yellow and green patches)

25

Why are TMV infected plants shorter than uninfected plants?

Reduces photosynthesis
As less chlorophyll in leaves
Reduces amount of glucose made
Reduces growth of plant

26

Name a disease caused by a protist

Malaria

27

What are the symptoms of malaria?

Recurrent episodes of fever
Can be fatal

28

How does a person become infected with the malaria causing protist?

Protist spread by mosquito
Protist injected into human when mosquito bites

29

How can the spread of malaria be reduced?

Use mosquito nets
Use insecticides to kill mosquitos
Drain land as mosquitos breeding in water
Use insect repellent

30

Give three ways in which the spread of disease can e reduced

Good hygiene
isolation of infected individuals
Vaccination