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Today in Microbiology Lab we checked what we had previously inoculated test tubes filled with glucose, sucrose, lactose, and TSI with our unknown "S".
Sucrose
The yellow color indicates a positive
Lactose
This is a slight positive test since there is some color change.
TSI
Since the slant is partly red this indicates that S hydrolyzes glucose to come extent and uses sucrose. Therefore S is preferential for glucose.
The yellow butt indicates that S produces acid.
Glucose
The yellow color indicates a positive test; therefore, S digests glucose.
Then we inoculated tubes with indole, urea, nitrate, methyl-red, citrate, and oxidase. Come back next time to see the results of these tests!
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