I'm confused. Did your doctor mean that your previous port has increased your risk for staph infections? I am not sure I understand how having a port would increase your risk for staph, or more specifically MRSA, which is the staph nasty staph that is a concern in the hospital. The port itself, while foreign to your body, should have been sterile on insertion, and accessing it is a sterile procedure, so (in my very tired and maybe not fully functioning mind) so it really shouldn't increase your risk of infection. Your body could certainly not tolerate your port, just like anything foreign that is added to your body, which could result in an immune response, but that wouldn't necessarily be a result of staph, unless the surgical procedure or accessing it breaks sterile technique.
I think that we are more at risk of picking up a drug resistant staph simply because we are at the doctors and hospitals more. I have worked in the ER for 7 years, we don't isolate our MRSA patients in the ER, so no yellow gowns for us. I am a MRSA carrier in my nose, diagnosed before I had any surgeries for my cancer, so not a result of the port. I have never had an infection or abscess resulting from it.
I do agree, though, that any infection should be treated by a doctor, because staph is nothing to mess with.