LabWork

How Big is a Bug ?

Sample:Before Filtration:After Filtration:
S.epidermidis colonies:

871

0
Phage plaques (10-4 dilution):

85

83

Interpretation of Results:

Click on what you think is the correct interpretation of these results:
  1. Bacteria are killed by filtration, viruses are not

  2. Bacteria (in this case, S.epidermidis) are smaller than viruses (such as bacteriophage l)

  3. Bacteria (in this case, S.epidermidis) are larger than viruses (such as bacteriophage l)

  4. Viruses are too small to see

  5. Viruses and bacteria are about the same size

DISCLAIMER          © AJC 2002.