Objective: To demonstrate the effects of symbiotic bacteria from lettuce on inactivation of norovirus（NV）. Methods: Symbiotic bacteria were isolated from the lettuces sampled from farmlands and supermarkets. NV mixed with symbiotic bacteria was set as the experimental group,without symbiotic bacteria as the control group. After the inactivation by high temperature,ultraviolet light（UV）and chlorine dioxide,the ratio of NV amount in the experimental group and the control group was calculated to evaluate the effects of symbiotic bacteria. The mechanism of symbiotic bacteria was revealed by detecting their effects on the protection of viral capsid protein from UV and on the adsorption of NV. Results: Eleven symbiotic bacteria were identified from lettuces,all of which were bacilli,mainly Pseudomonas. Ten symbiotic bacteria could improve the heat-resistant ability of NV,with Microbacterium oryzae,Cupriavidus taiwanensis（SC061204）,Pseudomonas furukawaii,Enterobacter tabaci and Pseudomonas resinovorans（SC061211）more significant. Eleven symbiotic bacteria could improve anti-UV ability of NV,with Pseudomonas putida,Microbacterium oryzae and Enterobacter tabaci more significant. Only one strain of Pseudomonas putida could improve anti-chlorine dioxide ability of NV（Class I hazard）. Pseudomonas putida,Microbacterium oryzae and Enterobacter tabaci could significantly reduce the damage of NV capsid protein. Nine symbiotic bacteria could promote NV adsorption into lettuces,with the promotion rates ranged from 1.04% to 46.73%;while Pseudomonas putida and Pseudomonas resinovorans（SC061211） could restrain NV absorption,with the promotion rates of -6.50% and -19.85%. Conclusion Symbiotic bacteria from lettuce may enhance the anti-inactivation of NV by protecting capsid protein and promoting adsorption of NV. It is recommended to control the presence of symbiotic bacteria in the process of inactivating NV.

Objective To investigate the risk factors associated with clinical stage in patients with non-small cell lung cancer(NSCLC).Methods The clinical data of 182 patients with non-small cell lung cancer admitted from July 2019 to March 2023 were retrospectively analyzed,and they were divided into stage Ⅰ,stage Ⅱ group(n=73)and stage Ⅲ,stage Ⅳ group(n=109)according to the clinical stage.Inter-group comparison and Logistic regression analysis were used to screen the risk factors affecting the clinical stage of patients,and receiver operating characteristic(ROC)curve was used to analyze the diagnostic value of these risk factors.Results Antinuclear antibody(ANA),fibrinogen(FIB)and cytokeratin 19 fragment(CYFRA21-1)were independent risk factors affecting the clinical stage of NSCLC patients.The optimal cut-off values of FIB and CYFRA21-1 were 4.07g/L and 7.07μg/L,respectively.The area under curve(AUC)of the combined diagnosis of clinical stage was 0.859,the sensitivity was 64.2％,and the specificity was 95.9％.Conclusion ANA,FIB and CYFRA21-1 are independent risk factors for the progression of clinical stage of NSCLC patients.The combined detection of the three indicators has certain reference value for the diagnosis of clinical stage in NSCLC patients.

OBJECTIVETo evaluate the application of multidisciplinary treatment (MDT) in patients with liver metastasis of colorectal cancer(CLM).

METHODSClinical data of 118 patients with liver metastasis of colorectal cancer, including 32 patients with MDT (MDT group) and 86 patients without MDT (control group), from February 2014 to April 2015 in PLA General Hospital were analyzed retrospectively. Compliance of preoperative examination and adjuvant therapy, and efficacy-associated indexes were compared between the two groups.

RESULTS(1) As compared to control group, statistically significant increase in imaging examination ratio was found in MDT group: chest CT [87.5%(28/32) vs. 40.7%(35/86), P=0.0000], abdominal MRI [84.4%(27/32) vs.61.6%(53/86), P=0.019], pelvic MRI [63.7%(7/11) vs. 24.3%(8/33), P=0.017]. The preoperative assessment of TNM staging was also higher in MDT group [100%(32/32) vs. 20.9%(18/86), P=0.0000], while there was no significant difference in accuracy rate of TNM staging between the two groups [81.3%(26/32) vs. 66.7%(12/18), P=0.2465]. (2) Rates of preoperative chemotherapy and chemotherapy completion were also higher in MDT group than those in control group [90.6%(29/32) vs. 62.8%(54/86), P=0.0033; 82.8% (24/29) vs. 57.4% (31/54), P=0.000], but conversion rate of unresectable CLM showed no significant difference [24.0% (6/25) vs. 14.3% (7/49), P=0.299 ]. (3) Rate of one-stage resection or ablation was higher in MDT group compared to control group [76.9%(10/13) vs. 36.0%(9/25), P=0.038], and resection rate of metastasis nidus was also higher in MDT group [77.0%(20/26) vs. 44.9%(13/29), P=0.015]. No significant differences were observed in rates of R0 resection, positive surgical margin, lymph node clearance, ablation of metastasis nidus, pathological complete response, postoperative chemotherapy or postoperative complications (all P>0.05).

CONCLUSIONMDT has the advantages on standardization of preoperative examination and perioperative chemotherapy, and can improve the rate of one-stage resection or ablation, as well as resection of metastasis nidus.

Aged ; Colorectal Neoplasms ; pathology ; Combined Modality Therapy ; Female ; Hepatectomy ; Humans ; Liver Neoplasms ; secondary ; therapy ; Lymph Nodes ; Male ; Middle Aged ; Neoplasm Staging ; Postoperative Complications ; Retrospective Studies ; Tomography, X-Ray Computed ; Treatment Outcome