Seronegative and septic arthritis Quiz: Ace Your Exams

Get ready to dominate your medical and nursing exams by using our dynamic quizzes to elevate your knowledge and increase your confidence. Whether you're gearing up for the USMLE®, COMLEX®, or your next in-class assessment, Osmosis quizzes tackle key topics in pathology, diagnostics, and treatment approaches. By honing in on clinical readiness and decision-making, we make sure the knowledge you gain empowers you both in the classroom and in real-world practice. Jump in and supercharge your exam prep!

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A 20-year-old man presents to the emergency department for evaluation of severe right knee pain and swelling. The pain has been making it difficult for him to bear weight on his right leg. He also endorses new exertional dyspnea, stating he becomes short of breath after climbing a flight of stairs. His temperature is 38°C (100.4°F), pulse is 95/minute, respirations are 22/minute, and blood pressure is 130/80 mmHg. Physical examination shows a thin, lean emaciated man with track marks on his forearms. The right knee is red, swollen and tender. Cardiac auscultation reveals a holosystolic murmur over the left lower sternal border. Arthrocentesis is performed and demonstrates a leukocyte count of 160,000/mm3 with 92% neutrophils. Which of the following is most likely to be observed on gram stain of synovial fluid?  

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