Will sepsis affect my breast augmentation?

A prior history of sepsis with a known cause, like kidney infection,  does not preclude you from having breast augmentation.  If you have fully recovered, are in good health, and had no pre-disposing risk factors for developing an infection in the first place, then your risks are about the same as anyone else.  There are things that patients can do to reduce their risk of infection associated with surgery.  It is important to discuss these strategies with your surgeon as they do not apply to all  patients and all surgeries.  If you are diabetic, you should keep your blood sugar in a normal range.  If you are a smoker you should quit before and after surgery.  If you are a weight-loss patient you should be sure that your vitamin and protein levels are within acceptable limits.  For the average patient, one to three doses of antibiotics around the time of surgery is sufficient.  You can lower the bacterial count on your skin with a Hibiclens shower the night before and morning of surgery.  Avoid shaving the areas around the operative site for 72 hours before surgery as this increases bacteria on the skin.  There are also some surgical centers that now screen patients for elective surgery for MRSA or antibiotic resistant bacteria.  This is only necessary if you have a prior history, or a risk factor for carrying the bacteria. 

Your past history of an infection does not increase your risk of having a breast augmentation. Just make sure that you don't have a urinary tract infection going into this surgery.

You do not give enough specific information on the cause of your sepsis.  However, it sounds like it is resolved and should not cause any increased risk with breast implants.  It is probably not necessary to put you on oral antibiotics after surgery, but if your surgeon may suggest it just to be on the safe side.