A 28-year-old man presents to A&E with high fever (40°C), productive

purulent cough and low blood pressure. His mother reports a laboratory

confirmed influenza infection two weeks ago, and that he was rather well until

earlier this morning when he suddenly developed high fever. A chest CT scan

reveals lung abscesses with cavity formation. Sputum Gram stain reveals

abundant neutrophils along with Gram-positive cocci arranged in clusters, which

on culture isolates were coagulase and catalase-positive.

Which infectious agent and associated factor are most likely responsible

for this patient’s symptoms?