Upper respiratory tract infection 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 2-year-old girl is brought to the emergency department by her parents for evaluation of increased work of breathing. According to her parents, the patient began experiencing ongoing sneezing, runny nose, and watery eyes around three-days ago. This morning, she developed a cough and difficulty breathing. The patient was born prematurely at 34-weeks, but past medical history is otherwise noncontributory. Temperature is 37.5°C (99.5°F), blood pressure is 92/60 mmHg, and pulse is 110/min. Physical examination is notable for a barking cough, inspiratory stridor, and accessory muscle use during respiration. A neck radiograph is obtained and demonstrates the following finding:


An X-ray shows an upper torso, primarily focusing on the neck and clavicles. A large white letter 'R' marks the left side of the image, indicating the right side of the patient.
Image reproduced from Radiopedia

Which of the following pathogens is most likely responsible for this patient’s disease process? 

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