What is sepsis?

Sepsis: There are now a set of 4 criteria that define sepsis. High or low WBC count, pulse of >90, respirations of 20 or greater and temperature elevation or hypothermia. Any 2 of these when infection is present constitutes "sepsis". There are further criteria for severe sepsis, septic shock and sepsis with multiorgan failure.

Clinical diagnosis: Sepsis is a clinical diagnosis - there is no lab test for sepsis. Lab tests are used to assist in the diagnosis of sepsis. Look at the SOFA score to see how clinical information is put together to determine if someone has sepsis https://en.wikipedia.org/wiki/SOFA_score The SOFA score uses vital signs, physical exam, and lab tests to help determine if someone has sepsis