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BIO2073: Microbiology Lab

Differential Tests II – Group Activity

Part A: Litmus Milk

Review the results in the PowerPoint file “Litmus Milk Data” and answer the following questions:

1. Based on the Day 2 results, give your best interpretation for each sample:

Sample	Litmus Color	Ferments Lactose?
A
B
C
D
E
F
G
H

2. Based on the Day 7 Results, give your best interpretation for each sample.

Sample	Clot formation?	Gas Production?	Reduction of Litmus?
A
B
C
D
E
F
G
H

Part B. EnteroPluri Data

For each sample, give your best interpretation of the results and generate a 5-digit Biocode. Then use the “EnteroPluri” PDF file to look up your number and determine the identify of your organism. Indole results have been provided for you.

Sample 1:

Sample 2:

Sample 3:

Sample 4: