Hello dear, Thank you for your contact to health care magic. I read and understand your concern. I am Dr Arun Tank answering your concern. This septicemia is post operative infection. I suggest you to do blood culture and sensitivity. Septicemia will show organisms in the blood, antibiotics sensitive to the bacteria should be taken. This will cure the infection at earliest. E. coli is the bacteria which is present in the gastro intestinal tract and infection may occur following postoperative infection. Your current approach is to take the antibiotics appropriatly. Maintain good hygiene locally that consist of good cleaning and dressing. Dressing should be done with the good antispectic solution with dettol and betadine. After application of polysporin is also advised. Avoid injury to the site of wound. Please give complete rest to the infected joint. I will be happy to answer your further concern on bit.ly/DrArun. Thank you, Dr Arun Tank Infectious diseases specialist, HCM.