Are there treatments for sepsis?

Yes. There is not just one treatment for sepsis, there are many coordinated treatments. Antibiotics will treat the infection, but other supportive care is also necessary. Fluid resuscitation, and possible support of your heart, lungs and kidneys will be important. As of now, with xigris taken off the market, there is no specific treatment for the inflammation of sepsis.
Yes. Yes, high dose (often iv) antibiotics targeting the specific bug are usually key to the treatment. Other medications can be used to target the inflammation caused by the infection to keep the lungs and blood vessels open. Sometimes medications are also required to keep the blood pressures up and control sugars while the body fights the infection.