Sulfolobus acidocaldarius was first
isolated from acidic hot springs of the Yellowstone National Park. Its optimum
temperature is between 70 and 75 ° C, the pH optimum of 2-3. Transmission
electron microscope 130,000:1 (at 12x12cm)
The baker's yeast is able to ferment a
variety of sugars (e.g. glucose, sucrose, maltose, raffinose, galactose) to
ethanol (alcoholic fermentation).
Scanning electron microscope, 12,500:1 (at 15x12cm)
This kind of Rhodobacter are photothrophic
(obtaining energy from light) bacteria, they oxidize Fe(II) - to Fe(III). Such
organisms have probably played an important role in the deposition of the
world's biggest iron ore deposits 3.8 to 2.5 billion years ago.
Scanning Electron Microscope 6000:1 (at
The bacterium Streptococcus mutans (yellow)
attaches itself to the surface of teeth and may cause tooth decay.
Lactobacillus paracasei (green) is also a bacterium. It attaches to the
streptococci and while inactivating them forms clusters with these unwanted
pathogens. SEM, 7000:1 (at
Legionella pneumophila are gram-negative,
flagellated rod-shaped bacteria. They can cause an inflammatory reaction
(pneumonia) in the lungs called legionellosis.
Transmission EM (TEM) 15,000:1 (at 15x12cm)
Lactobacillus and Helicobacter
Here you can see a cluster of Helicobacter
pylori (green) and Lactobacillus fermentum (lactic acid bacteria). H. pylori
can cause inflammation of the stomach lining. The lactic acid bacteria can
attach to Helicobacter and disable it.
7500:1 (at 15x12cm)
The bacterium Bacillus anthracis is the disease
causing agent of anthrax. Primarily, it is a disease of sheep, goats, cattle,
but is transferable to humans. In the Middle Ages anthrax was used in military
5000:1 (at 12x10cm)
Borreliosis (Lyme disease) is a bacterial
disease that is caused by the bacterium Borrelia burgdorferi. Ticks are the
vectors of this bacteria.
Scanning electron microscope, 5000:1 (at
Helicobacter pylori is the disease causing
agent of chronic active gastritis and duodenal ulcer. The bacteria are
helically wound and have up to 7 flagella.
Scanning electron microscope, 16,000:1 (at 15x12cm)
Listeria are widely common as soil
bacteria. They cause intestinal cramps and diarrhea. Listeria are able to enter
and to proliferate in the cytoplasm of many body cells.
Transmission electron microscope (TEM), 25,000:1 (at 15x12cm)
The picture shows different bacteria from a
stool sample. The different types are colored differently for better
differentiation. The human intestine contains hundreds of different bacteria
Scanning electron microscope, 25,000:1 (at
The bacteria Clostridium botulinum usually
is found in soil. In canned meat, the spores can germinate and produce their toxin.
The botulinum toxin is also known as Botox. As such, it is injected under the
face skin to paralyze muscles and thus to smooth out wrinkles.
Scanning electron microscope, 30,000:1 (at
The yeast Candida albicans can occur on
mucosa and moist skin as a white layer. Symptoms of infection are redness and
SEM, 1450:1 (at 12x8 cm)
The rod-shaped bacteria Bacillus sphaericus
can be found in water, soil, and on leaf surfaces. Their spores are highly
resistant to heat, irradiation, and many toxic chemicals.
Scanning electron microscope, 1600:1 (at
The mold Aspergillus fumigatus is
widespread in nature. On glucose agar it forms smoke-gray colonies at 37 ° Celsius,
at low temperatures it is green. It is one of the most common Aspergillus species. Scanning electron microscope, 1300:1 (at 12x12cm)
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