My ca15-3 was 13 last year and is 17 yesterday, i have a general infection, could this be the cause of elevation?

Unlikely: You may bave hyperparathyroidism. Have it checked out.

CA15.3: Why do you check CA 15.3? It is a tumor antigen used to monitor treatment response in advanced breast cancer. It is sensitive but not specific. It can be elevated in non-breast cancers as well as in some benign conditions (liver disease, chronic inflammation, etc). There is no direct association with infections. Value