Microbiology Pneumatocoele is most commonly caused by: September 2005, 2010 A Streptococcus pneumoniae B Klebsiella C Hemophilus influenzae D Staphylococcus aureus 💡 Explanation Pneumatocoele is most commonly caused by: September 2005, 2010 ✓ Correct Answer: D. Staphylococcus aureus