After observing the results from your blood agar plates, MSA plates and BCP-suga

Question

After observing the results from your blood agar plates, MSA plates and BCP-sugar tubes, determine the bacterium which formed each colony. If you cannot determine the bacterium, state that it is still unknown

Bacterium B Gram positive a-hemolytic Bacterium C Gram positive y-he molytic Bacterium D Bacterium E Gram negtive Gram negative Gram negative -hemolytic Bacterium F Bacterium A Gram positive a-hemolytic ? hemolytic y-hemolytic facultative anaerobe obligate anaerobe obligate aerobe obligate aerobe obligate aerobe facultative anaerobe ferments glucose, ferments glucose, ferments glucose ferments glucose ferments glucose ferments glucose sucrose and lactose sucrose and lactose only acid) only (acid) and sucrose and sucrose acid & gas)(acid & gas) ferments mannitol ferments mannitol does not fermentdoes not ferment acid) (acid& gas) does not ferment does not ferment (acid) (acid) mannitol mannitol mannitol mannitol

Explanation / Answer

Bacterium A- According to the results the organism can be related to species of Streptococcus being gram positive in nature and showing ?-hemolysis by isolating on blood agar. It also ferments sugars such as glucose, sucrose and is a positive indicator for mannitol fermentation.

Bacterium B- Similarly for these results, the organism is a Streptococci as they as obligate anaerobes as well and show ?-hemolysis.

Bacterium C- The organism could be Staphylococcus aureus. Being gram-positive in nature and showing similar characteristics as bacterium a and b but does not ferment mannitol and shows yellow-colored colonies.

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