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2. HSC Biology
• Module 3: The Search For Better Health
Students Learn to:
1. • Explain why cleanliness in food, water and
personal hygiene practices assist in control
of disease
1. Over 3000 years ago
the Chinese and
Hebrews were
advocating cleanliness
in food, water and
personal hygiene
1.2.

3. 5 Star
Cleanliness rating
1. Must wash hands
2. Must have a cleanliness
and food hygiene
certificate before any
food can be served

4. Sick Employee NOT wash
Hands
Contaminated
food
Sick Customer

5. Sick Employee NOT wash
Hands
Contaminated
food
Sick Customer
Why cleanliness in food will assist the
control of disease

6. Cleanliness in:
Food

7. Pathogens and microorganisms are absolutely everywhere.

8. Food
Air
Water
Pathogens and microorganisms are absolutely everywhere.

9. Bacteria
Fungi
Virus

10. - Nausea
- Vomiting
- Headaches
- Fever
- Fatigue
- Diarrhoea
Food Poisoning

11. How can we tell
when food has
been spoiled?

12. How can we tell
when food has
been spoiled?
1. The bad smell
2. Appearance
3. Slimy texture

13. How can we prevent, delay, or reduce contamination
from occurring in the first place?

14. How can we prevent, delay, or reduce contamination
from occurring in the first place?
1. FIFO - Food that is first
purchased is consumed first
2. Keeping raw foods and ready
to eat foods separate
FIFO

15. How can we prevent, delay, or reduce contamination
from occurring in the first place?
1. FIFO - Food that is first
purchased is consumed first
2. Keeping raw foods and ready
to eat foods separate
3. Ensure that leftover food is
placed in a fridge
Raw Ready

16. How can we prevent, delay, or reduce contamination
from occurring in the first place?
1. FIFO - Food that is first
purchased is consumed first
2. Keeping raw foods and ready
to eat foods separate
3. Ensure that leftover food is
placed in a fridge

17. How can we prevent, delay, or reduce contamination
from occurring in the first place?
1. FIFO - Food that is first
purchased is consumed first
2. Keeping raw foods and ready
to eat foods separate
3. Ensure that leftover food is
placed in a fridge
4. Always cook food thoroughly

18. Cleanliness in food is of utter
most importance for controlling
disease and for out own health

19. Clean Water
Cleanliness in:
Food

21. Boil any drinking water
first as this will kill any
existing microorganisms
and pathogens

22. The lack of clean water, poor
sanitation and lack of sewage
and proper water treatment is a
big public health issue.
Unclean water is the
primary cause
approximately 700,000
child deaths in the world

23. Contaminated Water

24. Contaminated Water
Adenovirus
Cholera
Giardiasis
Salmonellosis
Hepatitis A

25. In developing countries, about
80% of illnesses are linked to
poor water and sanitation
conditions.
80%
20%
Contaminated Water

26. In developing countries, about
80% of illnesses are linked to
poor water and sanitation
conditions.
80%
20%
Contaminated Water
Sadly, 1 out of
every 5 death for
children under the
age of 5 is due to
a water related
disease.

27. Good Personal Hygiene
Clean Water
Cleanliness in:
Food

28. Good Personal Hygiene
Completing different activities that help reduce the chances of
pathogens from entering the body and causing sickness.
Taking a shower and washing the
body often, preferably every day
1

29. Good Personal Hygiene
Completing different activities that help reduce the chances of
pathogens from entering the body and causing sickness.
Taking a shower and washing the
body often, preferably every day
1
Brushing and cleaning your teeth.2

30. Good Personal Hygiene
Completing different activities that help reduce the chances of
pathogens from entering the body and causing sickness.
Taking a shower and washing the
body often, preferably every day
1
Brushing and cleaning your teeth.2
Washing your hair at least once a week.3

31. Good Personal Hygiene
Completing different activities that help reduce the chances of
pathogens from entering the body and causing sickness.
Washing your hands with soap after
going to the toilet.
4

32. Good Personal Hygiene
Completing different activities that help reduce the chances of
pathogens from entering the body and causing sickness.
Washing your hands with soap after
going to the toilet.
4
5
Washing hands with soap before
you eat or prepare food.

33. Good Personal Hygiene
Completing different activities that help reduce the chances of
pathogens from entering the body and causing sickness.
Washing your hands with soap after
going to the toilet.
4
5
Washing hands with soap before
you eat or prepare food.
6 Changing into clean clothes.

34. Good Personal Hygiene
Completing different activities that help reduce the chances of
pathogens from entering the body and causing sickness.
Hanging clothes in the sun.7

35. Good Personal Hygiene
Completing different activities that help reduce the chances of
pathogens from entering the body and causing sickness.
Hanging clothes in the sun.7
8
Covering your mouth and turning
away when you cough or sneeze.

36. How does having good personal hygiene reduce the
incidence of disease?
Good Personal Hygiene

37. Showers do more than
get rid of body odour
Good Personal Hygiene
• Although you can’t see them, there
are microorganisms all over skin.
Some are good, some are neutral,
• When we take a shower, we’re
simply washing a lot of them away.
The longer we don’t take a shower,
the more they build-up on our skin,
and the worse we will smell.

38. Brushing our teeth can
also do the trick.
Good Personal Hygiene
• When we regularly brush our teeth,
we remove all that yellow plaque. It’s
that furry feeling we get on our teeth
after a long day or large meals.
• With all the things we use our mouth
for, it is a place where millions of
bacteria live. Some are harmless
whilst others look for the opportunity
to attack the teeth and gums.

39. Cleanliness in food, water and
personal hygiene is very important
in controlling the spread of disease.

40. Poor Countries

41. Some places around the
world don’t have access to
clean water whilst the lack of
education means that people
won’t understand how
diseases are spread, and
why simple practices for food,
water, and personal hygiene
need to be adopted
Poor Countries

42. That’s why it’s important that the
relevant government agencies set
up public health programs in order
to educate people on controlling
disease.
Just a simple bit of knowledge on
clean food, clean water, and taking
a shower everyday can make a
large difference in the lives of those
less fortunate than us.
Poor Countries