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...
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.
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.