Presentation on theme: "8C MICROBES AND DISEASE. MICROBES What is a microbe? What are the three types of microbes? Give an example of each. What do we use microbes to make?"— Presentation transcript:
8C MICROBES AND DISEASE
MICROBES What is a microbe? What are the three types of microbes? Give an example of each. What do we use microbes to make?
Micro-organisms The word MICRO means very small. (So you need a Microscope to see it!) http://www.cellsalive.com/howbig.ht m Micro-organism Man!
Micro-organisms Micro-organisms 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
Microbe uses carousel You will be assessed in this activity for AF2
Seven wonders of the microbe world
Bread mould experiment You are going to look at mould growing on bread over 2 weeks.
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?
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
Bacteria can double in number every 20 minutes!
The motility (movement) of some bacteria in culture. Pseudomonas aeruginosa How fast!
Good bacteria Bacteria help to break down faeces (poo) in sewage works.
Bad bacteria in the mouth cause teeth to rot. Mouth bacteria Mouth bacterium
MRSA- the bacterial superbug! M ethicillin R esistant S taphylococcus a ureus Methicillin (an antibiotic) WON’T Work to cure this infection!
Bacteria Cytoplasm Circle of DNA Cell wall Cell membrane
Bacteria CytoplasmCircle of DNA Cell wall Cell membrane Sometimes has a TAIL to help it swim
Structure of viruses
How viruses replicate inside cells
Examples of viruses A T4 bacteriophage. This infects only bacterial cells, in this case only E. coli The HIV virus. This attacks T4 lymphocytes. It is responsible for AIDS.
One sneeze can transmit many cold virus particles
Bird flu virus
Measles virus Electron microscope picture of the measles virus Boy with measles
Viruses cause warts, cold sores and verucae
Foot and mouth disease is caused by a virus and is VERY infectious for cows To this From this
Treatment of viral infections
Virus Protein Coat Strand of DNA
Virus Protein Coat Strand of DNA SMALLEST microbe Also NOT technically alive…
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. Why did the mushroom want to go out with the toadstool? Because he was a Fungi to be with!
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 What type of microbe is yeast? What do we use yeast to make? What types of respiration does yeast do?
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
Aim: to observe yeast growth Time (mins)Height of bubbles (mm)
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?
Bread mould 2 week results
Match the defense mechanism to its use
The immune system What is the immune system? Which cells defend us against disease? How do they defend us?
Vaccination Which cells produce antibodies? How do these cells respond when the body is infected? Why do vaccinations stop you getting ill again?