how clean are you
TRANSCRIPT
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How Clean Are Your Hands?
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Take an agar plate
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Press your fingers on the agar
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Incubate the plate for a few days...for a few days...
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Aargh! BACTERIA
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More BACTERIA
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Bacteria colonies from your hands!
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BBaacctteerriiaaThe colourful world of
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Bacteria are grouped according to their shapes.
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The most common shape is the rod shape.
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Pseudomonas fluorescens - soil bacteria
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Haemophilus influenzae (yellow) - causes flu
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Anthrax bacteria (green), used as weapons by terrorists
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Listeria monocytogenes (purple), infecting human brain cells.
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Escherichia coli (E. coli)The most common bacteria in the human intestines.
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Then there are the spheres.
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Streptococcus bacteria (orange) - attaching to human throat cells
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Streptococcus pyogenes - in a chain.
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MRSA - Methicillin Resistant Staphylococcus aureus infects thousands... in hospitals!
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A bunch of grapes? It’s the deadly staphylococcus again!
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Bacteria ejected out in a sneeze at speeds up to 160 km/h.
So cover your mouth and nose when you sneeze!So cover your mouth and nose when you sneeze!
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Some look like noodles!
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Leptospira - causes fever, headache, muscle ache, vomiting, jaundice, red eyes, diarrhoea, and abdominal pains.
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Luckily, we have white blood cells, our body’s soldiers.
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Mycobacterium tuberculosis (green) - causes TB, being eaten up by white blood cell (brown).
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Shigella (orange), trapped in white blood cells.
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Some have flagella to help them move.
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Helicobacter pylori (with flagella) - causes gastrointestinal diseases.
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Helicobacter
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Some stay in the most harsh environment.
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Bacillus infernus, found deep below earth’s surface.
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Here are some infamous viruses, which are smaller than bacteria.
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H5N1 (brown) - Bird Flu
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HIV = AIDS
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Bacteria, they’re everywhere.
Wash your hands with soap before you eat.