Hi Damien,
Welcome to healthcare magic!
STD Related
septic arthritis is a lethal problem because it has a component of systemic
sepsis,
If the infection is no more then PICC line should be also taken out because it can be per se a source of infection.
You need a physical examination by your physician and get base line investigations like Chest
X Ray, Electrocardiogram, Complete Blood Counts, Renal Function Test,
Liver Function Test,
Ultrasound Abdomen, Urine Compete Examination.
This work up is expected to detect the any remnant problem so a definite treatment could be provided if needed.
I hope this advise would be helpful for you.
Still if you have any queries or doubts, please write me back,
I would be happy to solve them.
Wish you a great health!