Suggest Healing Time For Staphylococcus Infection In Knee

hi i am Merima, and i wanted to know what should-what is the best thingto do, a patient that has had a knee operation, because he has a staphylococcus in the knee- a genus dex (staphylococcus aureus) ulcus bulbi duodeni and he also has diabetes? i also wanted to know how long is the recovery from that ( month or two). I am from Bosnia and Herzegovina and here the docotors do not give directly ansewers or just advices?