1. © Oxford University Press 2009 2.3 Avoiding microbes Slide 1

2. © Oxford University Press 2009 Where might you find most microbes? 2.3 How clean is it? Slide 2

3. © Oxford University Press 2009 Sneezes are an obvious source of microbes but where else can you pick them up? Picking up microbes 2.3 Avoiding microbes Slide 3

4. © Oxford University Press 2009 Whenever new homes are built, pipes like this are used to connect them to sewers. Sewers take human wastes away so diseases have less chance to spread. Removing microbes 2.3 Avoiding microbes Slide 4

5. © Oxford University Press 2009 Microbes reproduce fast when they have a good source of food… …and what’s food for us is food for them too. Growing your own 2.3 Avoiding microbes Slide 5

6. © Oxford University Press 2009 Many foods are stamped with dates to show when they should be eaten by. Often that’s just before the microbes in them have made the food smell rotten. Use by dates 2.3 Avoiding microbes Slide 6

7. © Oxford University Press 2009 Find out which sorts of food have the closest use-by dates. Out of date? 2.3 Avoiding microbes Slide 7

8. © Oxford University Press 2009 It’s hard to avoid colds, or know who passed you the virus. The microbes that cause STI’s (sexually transmitted infections) only survive for a few seconds outside the body… …so it’s easier to protect yourself. 2.3 Staying safe Slide 8

9. © Oxford University Press 2009 During sex, body fluids mix. Condoms stop body fluids mixing during sex. STI transmission 2.3 Staying safe Slide 9

10. © Oxford University Press 2009 2.3 Match up Match the hazardous microbe to a method that will stop it spreading. 1.Chlamydia 2.Salmonella 3.Cold virus 4.E. coli from faeces Good sewers Wash hands often Use a condom Cook food well, don’t keep it warm Show answers Slide 10

11. © Oxford University Press 2009 2.3 Match up Match the hazardous microbe to a method that will stop it spreading. 1.Chlamydia 2.Salmonella 3.Cold virus 4.E. coli from faeces Good sewers Wash hands often Use a condom Cook food well, don’t keep it warm Slide 11

12. © Oxford University Press 2009 Slide 12

13. © Oxford University Press 2009 Questions to answer Slide 13

14. © Oxford University Press 2009 Questions to answer Slide 14

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20. © Oxford University Press 2009 Slide 20

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23. © Oxford University Press 2009 Q10. List four sources of microbes. Slide 23

24. © Oxford University Press 2009 Q11. Why is it good to keep sewers in a good state of repair? Sewers take human wastes away so diseases have less chance to spread. Slide 24

25. © Oxford University Press 2009 Q12. Use by dates on food are only a rough guide. Explain why. Many foods are stamped with dates to show when they should be eaten by. Often that’s just before the microbes in them have made the food smell rotten. Slide 25

26. © Oxford University Press 2009 2.3 Match up 1.Chlamydia 2.Salmonella 3.Cold virus 4.E. coli from faeces Good sewers Wash hands often Use a condom Cook food well, don’t keep it warm Show answers Q13. Match the hazardous microbe to a method that will stop it spreading. Slide 26

27. © Oxford University Press 2009 Q14. Describe four ways of cutting the number of infections you get Slide 27

28. © Oxford University Press 2009