<prompt> An infant presented to OPD with features of respiratory distress. The X-ray is shown below. The most probable organism isS. aureusS. pyogenesKlebsiellaE.coli  <response>: Staphylococcus aureus is the most dangerous of all of the many commonstaphylococcal bacteria. ... These bacteria are spread by having direct contact with an infected person, by using a contaminated object, or by inhaling infected droplets dispersed by sneezing or coughing. Ref essential paediatrics :op ghai 9e 