A mother brings her 12-year-old child complaining of a fever and a severe sore throat to see the physician. After examining the patient, the physician orders a rapid strep test, which comes back...

A mother brings her 12-year-old child complaining of a fever and a severe sore throat to see the physician. After examining the patient, the physician orders a rapid strep test, which comes back negative. The physician then orders a culture and sensitivity test and asks you to collect a throat swab to be sent to the laboratory for testing.

 1. Why did the physician order a culture and sensitivity after the rapid strep test was negative?

 2. Will the physician treat the illness differently based on the test results?