Two types of bacteria were isolated from a patient’s throat swab and grown in pure culture on separate agar plates - HSC - SSCE Biology - Question 7 - 2019 - Paper 1
Question 7
Two types of bacteria were isolated from a patient’s throat swab and grown in pure culture on separate agar plates. On each plate there were FOUR different antibioti... show full transcript
Worked Solution & Example Answer:Two types of bacteria were isolated from a patient’s throat swab and grown in pure culture on separate agar plates - HSC - SSCE Biology - Question 7 - 2019 - Paper 1
Step 1
Identify Bacteria A and B
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Answer
Bacteria A shows resistance to antibiotics W, X, and Y, as there is significant bacterial growth around these discs, while there is a clear zone of inhibition around disc Z. Bacteria B shows resistance to antibiotics Y and Z, with visible growth around W and X.
Step 2
Determine the appropriate antibiotic
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Answer
Since Bacteria A is showing sensitivity to antibiotic Z (clear zone of inhibition) while it is resistant to others, Z is the antibiotic that should be used to treat the patient.
