In this study, the investigators will dynamically detect the expression of an immune regulator- T cell Ig and mucin domain protein 3 (Tim-3) in patient with sepsis.

In this study, we will collect the peripheral blood of 1,3,5,7,10,14 day after diagnose of sepsis.All the patients rolled in this study will be divided into three groups which is sepsis, severe sepsis and septic shock group according their severity. Then,the flow cytometry will be used to detect the express of Tim-3 on monocyte and ELISA will be used to exam the plasm soluble Tim-3.IL-6,IL-10,IL-12 and TNF-αin the peripheral blood will also be detected. We would like to find a new marker to predict the severity and prognosis of sepsis patients.

Inclusion Criteria:

• More than one of the following:

clinical manifestations: (1) a body temperature greater than 38℃ or less than 36℃; (2) a heart rate greater than 90 beats/minute; (3)tachypnea, manifested by a respiratory rate greater than 20 breaths per minute, or hyperventilation, as indicated by a PaCO2 of less than 32 mmHg; and (4)an alteration in the white blood cell count, such as a count greater than 12×10^9/L, a count less than 4×10^9/L, or the presence of more than 10 percent immature neutrophils

Exclusion Criteria:

• (1)patients younger than 18 years of age; (2)agranulocytosis (granulocyte counts,0.5×10^9/L); (3) those discharged within 24 h; (4) those diagnosed with HIV infection or cancer; and (5) patients who refused to participate.

patients with sepsis