<prompt> A3 year old non-vaccinated child presented with fever and fast breathing. His mother told that he has recently developed measles rash. CXR shown below is indicative of which infection?Staphylococcus aureusStaphylococcus AlbusStreptococcal pneumoniaeStreptococcal viridans  <response>: Ans. a Staphylococcus AureusThe Chest X Ray shows a cystic cavity in right upper zone indicative of infection with a virulent organism. In setting of recovery from measles the organism responsible is Staphylococcus Aureus. 