Download Bacteria

 One square inch of skin contains more than a
half a million bacteria
Lactobacillus acidophilis
lacto = milk
bacillus = rod shaped
philus= love of
Streptococcus pyogenes
strepto = in chains
coccus = round shaped
Streptococcus pyogenes
Bacteria
Number of cells:
Unicellular
Nucleus:
No
Reproduction:
Fission- a form of asexual
reproduction
Sexual
Virus
No cells; not living
No because it has no cells
Invades a host cell and takes
over the cell causing it to
make copies of the viral
DNA. Destroys the host cell
releasing new viruses.
Can cause disease?:
Yes
Yes
Size:
Larger (1000 nanometer)
1 nm = one billionth of m
Smaller (20 – 400 nm)
Antibiotics
Vaccines prevent the spread
and antiviral medications
help to slow reproduction but
can not stop it completely.
How is it treated?:
Shape:
Bacterial Infections
Viral Diseases
Pneumonia
Polio
Strept throat [chains]
Measles
Staph Infection [clusters]
Rabies
Food Poisoning
Chicken Pox
Scarlet/Rheumatic fever
Common Cold/Sinus discomfort
Flu/Cold Sore
Tetanus
Hepatitis
Tuberculosis
HIV
The virus is about to
attack the bacterium.
Ebola
The virus injects its
genetic material
into the bacterium.
The bacterium explodes
after it is forced to make
copies of the virus!
http://www.youtube.com/watch?v=Rpj0emEGShQ
400 x- cocci shaped
400 x- cocci shaped but
in a sheath causing them
appear rod shaped
- Produce food in lakes and ponds
- In large amounts can cause death to life in lake due to consuming all oxygen
 99% of Bacteria are helpful: help with digestion, used to make food,
break down oil spills, purify water at
sewage treatment plants
 90% of the cells in/on your body are bacteria.
 Scientists estimate bacteria produce nearly ½ of oxygen found in
atmosphere
 One square inch of skin contains more than a half a million bacteria