Q: Given a context passage, generate a question from the passage such that its answer is shortest continous span from the passage.
Clinical evidence for failure with beta-lactam therapy has been lacking for patients with borderline oxacillin-resistant Staphylococcus aureus (BORSA) infections. We describe a failure of cloxacillin for a patient with endocarditis due to BORSA. The isolate also had false-negative thermonuclease and coagulase test results.
A:
What is BORSA?