SP A 4-year-old girl is rushed to the hospital with fever an…
SP A 4-year-old girl is rushed to the hospital with fever and a “barking” cough. She has had no childhood vaccines. Examination of her pharynx shows a “cherry-red” swollen epiglottis protruding into her airway. The etiolgoic agent is a coccobacillus. Which of the following bacteria is the most likely cause of this presentation?