<prompt> Most common organism causing both ASOM CSOM includesStreptococcus pneumoniaeStaphylococcusH. influenzaMoraxella  <response>: A Streptococcus pneumoniae ASOM: Most common organisms in infants and young children are Streptococcus pneumonia 30, Haemophilus influenzae 20 and Morexella catarrhalis 12. Other organisms include streptococcus pyogenes, staphylococcus aureus and sometimes pseudomas aeroginosa. In about 18-20, no growth is seen. Many of the strains of H. influenzae and Morexella catarrhalis are 3-lactamase producing. CSOM: Pus culture in both types of aerobic and anaerobic CSOM may show multiple organisms. Common aerobic organisms are PS aeruginosa, Proteus, Esch. coli Staph, aureus, while anaerobes include Bacteroides fragilis and anaerobic streptococci. 