Download Virus Vs. Bacteria!

Virus vs.
Bacteria!
What's the
difference?
By the end of today's class you will be
able to...
Compare and contrast microbes:
·Size, shape, structure
·Whether they are living cells
Virus Vs. Bacteria!
NOTES!
Viruses and Bacteria BOTH are microbes that have DNA
Bacteria AND viruses BOTH can cause
diseases!
DIFFERENCES
Cellular or Noncellular?
Bacteria:
Single cell
Virus: NOT a CELL!
http://www.brainpop.com/health/diseasesinjuriesandconditions/viruses/
DIFFERENCES
Living or Non-living?
Bacteria: Living!
·Can reproduce at very high rates
·Are found everywhere!
Virus: NON-living!
·Viruses are not living cells…they can’t move, eat, or reproduce by themselv
·BUT, if a virus can get inside a living cell, it can reproduce!
·SO viruses are always trying to invade living cells!
DIFFERENCES
Structure?
Bacteria: cell wall, cytoplasm, DNA (NOT in a
nucleus!)
Virus: Protein shell surrounding DNA
DIFFERENCES
Size?
Bacteria: Very small, but
bigger than virus
Viruses!
Bacteria!
Virus: Very small, but smaller
than bacteria
DIFFERENCES
Shape?
Bacteria: sphere, rod-shaped, spiral
Virus: round, rod, bullet
Bacteria AND viruses can BOTH cause disea
Diseases
Bacteria!
-food poisoning
-Lyme disease
-strep throat
-pneumonia
-tuberculosis
-typhoid fever
Virus!
-influenza (the flu)
-chicken pox
-malaria
-HIV/ AIDS
-measles
-common cold
How do we treat the diseases?
Bacteria!
-Antibiotics
-kills or slows
the growth of
the bacteria
Virus!
-Vaccines
-we use vaccines to
try to prevent us from
getting the virus
Using antimicrobial solutions
·Kills 99% of germs?
·What about that 1% of germs that lives?
·They are immune to the solution
·They reproduce more microbes that are immune to the solution
·So what do you end up with? A huge population of harmful microbes that
are not affected by the antimicrobial solution!
Are bacteria good or bad?
·They can be both!
·Bacteria cause diseases such as tuberculosis, food poisoning,
Lyme disease.
·Others eat harmful materials and release good vitamins and
nutrients.
Case Studies!
-Look and each picture and read the case
study
-In your notebook, answer the questions for
each case study. Label each: Ex. "Case study 1"
-You will have two minutes at each station!
Which statement below correctly identifies the
reason why viruses are not considered alive?
A
B
C
D
They have DNA or RNA.
They have a protein coat.
They are really small.
They can only reproduce inside cells
How do bacteria not help humans?
A
B
C
D
They cause diseases.
They make food products.
They help digest foods.
They eat harmful microbes.
What do viruses and bacteria have in common?
A They both cause disease.
B They are both living.
C They are both harmful to the
environment.
D They are both a cell.