How will i know if i have mrsa in my bloodstream?

You'll know...: Mrsa bloodstream infections are serious, so your immune system will be on overdrive to fight the infection- early on, it may manifest flu- like symptoms. This may be followed by fever, low bp, sweating, others. Typically, you will look and feel really crappy. The exception is if you are on drugs for immunosuppression (transplant, rheum athritis, etc). Blood cultures will secure the diagnosis.

Fever: Bacteria in the blood causes fever.