How Clean Are You

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  • How Clean Are Your Hands?

  • Take an agar plate

  • Press your fingers on the agar

  • Incubate the plate for a few days...

  • Aargh! BACTERIA


  • Bacteria colonies from your hands!

  • BacteriaThe colourful world of

  • Bacteria are grouped according to their shapes.

  • The most common shape is the rod shape.

  • Pseudomonas fluorescens - soil bacteria

  • Haemophilus influenzae (yellow) - causes flu

  • Anthrax bacteria (green), used as weapons by terrorists

  • Listeria monocytogenes (purple), infecting human brain cells.

  • Escherichia coli (E. coli)The most common bacteria in the human intestines.

  • Then there are the spheres.

  • Streptococcus bacteria (orange) - attaching to human throat cells

  • Streptococcus pyogenes - in a chain.

  • MRSA - Methicillin Resistant Staphylococcus aureus infects thousands... in hospitals!

  • A bunch of grapes? Its the deadly staphylococcus again!

  • Bacteria ejected out in a sneeze at speeds up to 160 km/h. So cover your mouth and nose when you sneeze!

  • Some look like noodles!

  • Leptospira - causes fever, headache, muscle ache, vomiting, jaundice, red eyes, diarrhoea, and abdominal pains.

  • Luckily, we have white blood cells, our bodys soldiers.

  • Mycobacterium tuberculosis (green) - causes TB, being eaten up by white blood cell (brown).

  • Shigella (orange), trapped in white blood cells.

  • Some have flagella to help them move.

  • Helicobacter pylori (with flagella) - causes gastrointestinal diseases.

  • Helicobacter

  • Some stay in the most harsh environment.

  • Bacillus infernus, found deep below earths surface.

  • Here are some infamous viruses, which are smaller than bacteria.

  • H5N1 (brown) - Bird Flu

  • HIV = AIDS

  • Bacteria, theyre everywhere.Wash your hands with soap before you eat.