What are bacteria Bacteria are living organisms They are so small you need a microscope to see them They come in different shapes and sizes They can be found everywhere How big are bacteria ID: 933241
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Slide1
Balloon Bugs
Make your own balloon bacterium
Slide2What are bacteria?
Bacteria are living organisms.
They are so small you need a microscope to see them.
They come in different shapes and sizes.They can be found everywhere!
Slide3How big are bacteria?
Bacteria are tiny! Millions can fit on a single pin head.
Images: Genome Research Limited
Slide4What shape are bacteria?
There are three main shapes of bacteria:
Spirals (Spirochetes)
e.g.
Campylobacter sp.
Rods
(Bacilli)
e.g.
Citrobacter
sp.
Balls
(
Cocci
)
e.g.
Staphylococcus sp.
Images: Sharon Peacock, Oxford University; David
Goulding
,
Wellcome
Trust Sanger Institute; De Wood,
Pooley
, USDA, ARS, EMU
Slide5How do bacteria move?
Some bacteria have special structures that help them move. These are called flagella.
Images: David
Goulding,
Wellcome
Trust Sanger Institute; De Wood,
Pooley
, USDA, ARS, EMU
flagella
flagellum
Slide6Some bacteria can make us feel ill
Campylobacter
jejuni
Causes food
poisoning
Salmonella
Typhimurium
Causes food poisoning
Streptococcus
pneumoniae
Causes a sore throat and pneumonia
Images: Rocky Mountain Laboratories, NIAID, NID; David
Goulding
,
Wellcome
Trust Sanger Institute; De Wood,
Pooley
, USDA, ARS, EMU
Slide7Are there “good” bacteria?
Not all bacteria are harmful. There are some bacteria that are used in producing cheese and yogurt. This is called
Lactobacillus.
Images: Genome Research Limited
Slide8Can you make a balloon bacterium?
Choose from the three bacteria below
Campylobacter
jejuni
Salmonella
Typhimurium
Streptococcus
pneumoniae
Images: Rocky Mountain Laboratories, NIAID, NID; David
Goulding
,
Wellcome
Trust Sanger Institute; B Wren, London School of Hygiene and
T
ropical Medicine