Test
Picture
Description
Result
Blood agar
Metabolic reaction: positive for complete hemolysis(alpha)because there is bacterial growth.
Color: White
Reaction: Negative
Ph: none
EMB
Metabolic reaction: Positive for fast lactose and low ph due to acid production.
Color: Green
Reaction: Positive
Ph: Acidic
MacConkey
Metabolic Reaction: positive for lactose fermentation, pink it’s also gram negative
Color: pink
Reaction: Positive
Ph: Acidic
MSA
Metabolic Reaction: Positive because its yellow it’s a halophile
Color: Green
Reaction: Positive
Ph: Acidic
MR_48hr
Metabolic Reaction: Positive because glucose was fermented.
Color: pink
Reaction: Positive
Ph: Acidic
MR
Metabolic Reaction: Positive because glucose was fermented.
Color: pink
Reaction: Positive
Ph: Acidic
VP
Metabolic Reaction: Negative because there was no glucose fermented.
Color: yellow
Reaction: Negative
Ph: Acidic
Part 1
I would perform Hektoen Enteric Agar to Isolate the samples for gram negative bacteria. After placing the sample on a hektoen enteric agar only gram negative would grow. The purpose to find why one strain is gram negative is to check if its safe to handle or handle with care because gram negative is more dangerous due to that make treating them more difficult unlike gram positive bacteria.
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