A 76-year-old male presents to the hospital with a hot, swollen, and painful right knee that appears to have an effusion. After
your examination, you decide to perform an arthrocentesis. The fluid aspirate is turbid, cloudy, and most definitely looks like it is infectious material. Based on this clinical scenario, what would be the most likely bacterial organism present in an elderly septic arthritis? (A) Hemophilus influenzae
(B) Neisseria gonorrhoeae
(C) Pseudomonas aeruginosa
(D) Staphylococcus aureus
(E) Streptococcus pneumonia
Septic arthritis is the joint infection that caused by foreign bodies or bodies such as virus, mycobacteria, bacteria and fungi but staphylococcus aureus is most common organism to infect in old person.
All options are true because of septic arthritis but in respect of a 76 year old the only correct answer is option c.
