Ranking question

A 28 year old IV drug user presents to A&E with fever and back pain. He prepares his drugs using tap water and does not clean his skin prior to injecting. On examination, he was pyrexial at 40 degree Celsius, pan-systolic murmur on auscultation and tenderness over his thoracic spine on percussion.

Rank the following causative organisms given the above information, putting the MOST LIKELY organism first, and the least likely organism last.

A) Streptococcus pyogenes

B) Candida albicans

C) Escherichia coli

D) Staphylococcus aureus

E) Pseudomonas aeruginosa

Suggested answer: D, A, E, C, B