Psoriasis is a chronic,non-infective inflammatory dermatosis characterized by erythemas covered with scales.Psoriasis is considered as a systemic disease,and several studies have confirmed that it is associated with many other diseases,such as cardiovascular diseases,obesity,diabetes mellitus type Ⅱ,dyslipidemia,nonalcoholic fatty liver disease,anxiety disorder,depression and inflammatory bowel disease.The occurrence and development of psoriasis is closely related to the immune response,and the immune dysfunction of T lymphocytes induced by the infiltration and activation of inflammatory cells has been confirmed as the key step in the pathogenesis of psoriasis.Various kinds of cytokines in the local microenvironment can promote the activation and proliferation of T lymphocytes,and regulate the differentiation of T lymphocytes into different subsets,which take an important part in the occurrence of psoriasis.In recent years,researchers have found that local microbes also play an important role in this process.Thus,this review summarizes the progress in the roles of human skin and gut microbiota in psoriasis.

OBJECTIVETo investigate the incidence of surgical site infection (SSI) and risk factors in colorectal cancer surgery patients.

METHODSBetween October 2003 and October 2013, 1 381 consecutive patients with colorectal cancer managed surgically with primary anastomosis were included in the study. There were 762 male and 619 female patients with mean body mass index (BMI) was (27.7 ± 3.7) kg/m², aged from 20 to 90 years with a median of 67 years. Patients undergoing emergency surgery and requiring stoma creation were excluded. The patients' characteristics, surgical conditions and prognosis were recorded. Univariate and multiple logistic regression analysis were used to identify any variable predictive factors of SSI.

RESULTSOne hundred twenty-six (9.12%) cases developed incisional SSI. The occurrence time for SSI was from 2 to 20 days, mean (6.7 ± 2.9) days. According to multivariable logistic regression analysis, BMI (OR = 1.058, P = 0.030), intraoperative contamination (OR = 10.549, P = 0.000) and open operation as compared with a laparoscopic procedure (OR = 2.111, P = 0.001) were significant independent predictors of incisional SSI. There was a significant decrease in incisional SSI in wound protectors group (OR = 1.646, P = 0.012).

CONCLUSIONBMI and intraoperative contamination are independent predictors of incisional SSI, and wound protectors and laparoscopic surgery are associated with a lower incidence of incisional SSI following colorectal cancer surgery.

Adult ; Aged ; Aged, 80 and over ; Anastomosis, Surgical ; Body Mass Index ; Colorectal Neoplasms ; surgery ; Colorectal Surgery ; Female ; Humans ; Logistic Models ; Male ; Middle Aged ; Prognosis ; Retrospective Studies ; Risk Factors ; Surgical Wound Infection ; etiology ; Young Adult