<prompt> Epiglottitis in a 2-year-old child occurs most commonly due to infection with:Influenza virusStaphylococcus aureusHaemophilus influenzaeRespiratory syncytial virus  <response>: Though the introduction of Hib vaccine has reduced the annual incidence of acute epiglottitis but still most of the pediatric cases seen today are due to haemophilus influenzae B. --Harrison 17thed p212 In adults it can be caused by group A streptococcus, S. pneumoniae, S. aureus and Klebsiella pneumoniae 