Human Microbe Symbionts
Name:
Partner:
Date:
Colony Description
Colony
Cell Type
Diameter
(mm)
Form
Margin
Elevation
Color
Number
Cell Shape*
Gram +/ŠA
B
C
D
E
F
G
*Indicate ND (not determined) if you
did not do a smear with this colony
Class Totals
# of Colonies that tested:
Gram positive
Gram negative
Cocci
Bacilli
General Biology and Lab II – BIO196
Name:
Date:
Human Microbe Symbionts
Partner:
Questions
1. Why were there bacteria under your fingernails or in your hair? What symbiotic relationship do you
think these bacteria have with you?
2. Did you observe any fuzzy colonies? If there were fuzzy colonies on your plate what type of
organisms do you think they were or would be if you had them?
3. What are the most common colony shapes, colony margins, and colony color found in the species
you observed?
4. Based on your observations, comment on the reliability of colony morphology in the identification of
a given bacterial species.
5. Based on the total class counts what was the most dominant bacterial type found under fingernails or
in hair. What explanation can you give for this observation?
6. When a surgeon scrubs for an operation he or she uses a brush under the nails for a significant period
of time. Do you think this procedure removes all of the bacteria? Explain.
7. What is the difference between sterile and sanitized?
Human Microbe Symbionts
Name:
Partner:
Date:
Colony Description
Cell Type
Colony
Diameter
(mm)
Form
Margin
Elevation
Color
Number
Cell Shape*
Gram +/ŠA
1
smooth
wavy
aerial
pink
1
triangle
+
B
0.1
wrinkled
smooth
flat
cream
2
round
+
C
D
E
F
G
*Indicate ND (not determined) if you
did not do a smear with this colony
Class Totals
# of Colonies that tested:
Cocci
Gram positive
+
Gram negative
Bacilli
+

Purchase answer to see full
attachment