Presentation is loading. Please wait.

Presentation is loading. Please wait.


Similar presentations

Presentation on theme: "8C MICROBES AND DISEASE."— Presentation transcript:


2 MICROBES What is a microbe?
What are the three types of microbes? Give an example of each. What do we use microbes to make?

3 Top trumps

4  Micro-organisms Micro-organism Man! The word MICRO means very small.
(So you need a Microscope to see it!) Micro-organism Man!

5 Micro-organisms  Micro-organisms So Micro-organisms are very
Micro- very small Organism- a living thing. So Micro-organisms are very small living things! N.B Viruses are often classed as micro- organisms but technically they are NON-Living so call them Microbes instead! Micro- organism man

6 Microbe uses carousel You will be assessed in this activity for AF2

7 Seven wonders of the microbe world

8 Bread mould experiment
You are going to look at mould growing on bread over 2 weeks.

9 Diseases What is the scientific word for a microbe that causes disease? Name an example of a disease caused by a bacteria, virus and fungus?

10 Bacteria The good the bad and the ugly!
Bacteria The good the bad and the ugly! Bacteria are small living single celled organisms that can come in good (beneficial) forms and bad (pathogenic) forms that cause disease. Some different shapes of bacteria

11 Bacteria can double in number every 20 minutes!

12 The motility (movement) of some bacteria in culture.
How fast!  Pseudomonas aeruginosa  

13 Bacteria help to break down faeces (poo) in sewage works.
Good bacteria Bacteria help to break down faeces (poo) in sewage works.

14 Bad bacteria in the mouth cause teeth to rot.
Mouth bacteria Mouth bacterium

15 MRSA- the bacterial superbug
MRSA- the bacterial superbug! Methicillin Resistant Staphylococcus aureus Methicillin (an antibiotic) WON’T Work to cure this infection!


17 Bacteria Cell membrane Cell wall Cytoplasm Circle of DNA

18 Bacteria Sometimes has a TAIL to help it swim Cell membrane Cell wall
Cytoplasm Circle of DNA Sometimes has a TAIL to help it swim

19 Structure of viruses

20 How viruses replicate inside cells

21 Examples of viruses The HIV virus. This attacks T4 lymphocytes. It is responsible for AIDS. A T4 bacteriophage. This infects only bacterial cells, in this case only E. coli

22 One sneeze can transmit many cold virus particles

23 Bird flu virus

24 Measles virus Electron microscope picture of the measles virus
Boy with measles

25 Viruses cause warts, cold sores and verucae

26 Conjunctivitis

27 Foot and mouth disease is caused by a virus and is VERY infectious for cows
From this To this

28 Treatment of viral infections

29 Virus Protein Coat Strand of DNA

30 Virus SMALLEST microbe Also NOT technically alive… Protein Coat
Strand of DNA SMALLEST microbe Also NOT technically alive…

31 Fungi  Fungi are organisms that produce spores
Why did the mushroom want to go out with the toadstool? Because he was a Fungi to be with! Fungi Fungi are organisms that produce spores and come in the form of moulds, yeasts, mushrooms and toadstools. They also help things to rot and breakdown which is an essential process in the cycle of life.

32 Examples of fungi Mould growing a bread bun Yeast cells budding
There can be good forms of fungus (used to make bread/beer) and bad forms (Mould, Athletes foot and thrush). Yeast cells budding

33 Mould and fungus causes things to breakdown

34 Fungus taking over

35 Athletes foot

36 Oral thrush Thrush yeast cells

37 Fungi Cell membrane Cytoplasm Cell wall Nucleus Starch granule Vacuole

38 Fungi BIGGEST microorganism Cell wall Starch granule Vacuole Nucleus
Cytoplasm Cell membrane BIGGEST microorganism

39 Sort the cards into if they are caused by a bacteria, virus or fungus


41 Similarities and differences
What do bacteria and viruses have in common? How are viruses different to bacteria and fungi?

42 Mould What is mould? Why does food go mouldy?
Name 5 different methods of stopping mould growth and explain why they stop it.

43 Mould investigation Aim: To investigate how to stop mould growing in gravy Variables Independent: Dependent: Control: Prediction

44 nutrient-agar-home.html

45 Gravy experiment results and conclusion


47 Yeast What type of microbe is yeast? What do we use yeast to make?
What types of respiration does yeast do?

48 Plan an investigation into one factor that affects yeast growth
You are going to put yeast, sugar, a drop of washing up liquid and warm water in a measuring cylinder Choose one factor to change and investigate Write the Aim, prediction, and variables

49 Aim: to observe yeast growth
Time (mins) Height of bubbles (mm)

50 The first line of defense
How can diseases be passed from one person to another? What is the bodies’ first line of defense to stop microbes entering?

51 Bread mould 2 week results

52 Match the defense mechanism to its use

53 The immune system What is the immune system?
Which cells defend us against disease? How do they defend us?

54 Video

55 Vaccination Which cells produce antibodies?
How do these cells respond when the body is infected? Why do vaccinations stop you getting ill again?

56 Video





Similar presentations

Ads by Google