Examine the data in Figures 1 and 2. Come to consensus within your group about the following questions:
What is the degree of genetic relatedness among each of the isolates in this experiment?
o which isolate is the isolate carried by Kayla most closely related?
Noting the differences in DNA banding patterns below, explain how these MRSA isolates can be susceptible to the
same antibiotics? o different antibiotics?
Figure 1. Description of Samples in Each Lane
Lanes and —Hospital-acquired MRSA isolates; both patients had multiple previous hospitalizations. Both were susceptible only to vancomycin.
Lanes–—MRSAisolatesobtainedfrompediatricpatients without any known risk factors for MRSA. Antibiotic susceptibility includes trimethoprimsulfamethoxazole, tetracycline, and vancomycin.
Lane —Isolate from Dr. Collin’s patient.
“Dr. Collins and the Case of the Mysterious Infection” by Lemons & Huber