A 17-year-old male presents with severe right hip pain of several days duration. He reports that he felt a "pop" when playing basketball a few days prior, and the pain intensified. Over the past few weeks, he has had pain in both of his knees and elbows. He currently is having difficulty ambulating and is reporting a history of subjective fevers. Upon further questioning, he denies alcohol, smoking, or drug use. On physical examination, his leg is flexed and externally rotated. He also has a rash over his body. Current imaging is shown in Figures A and B. He is sent for ultrasonagrapy-guided aspiration. Which of the following is the most likely finding when the joint fluid is analyzed?