Objective To evaluate the effect of various sampling errors on ELISA test results. Methods Standard sample volume,standard sample volume reducing 1,2,3,4 μL or adding 1, 2,3 μL were respectively pipetted into the wells of a microplate,follwed by routine operation of ELISA test. Then the influence of various sampling errors was analyzed on ELISA test results of HBsAg, HCV and TP. Results S/CO value was increased with the increase of sample volume. The statistical difference of mean S/CO value of HBsAg and TP was only found between sample volume adding 3 μL group and control group(P<0.05). For HCV result, there were significant differences between standard sample volume adding 2,3μL or reducing 3,4μL groups and control group(P<0.05), while no obvious differences were found in the other groups(P>0.05). The difference of mean positive rate between ex-perimental groups and control group showed an increasing tendency with the reduction of sample vol-ume,and significant differences in HBsAg, HCV and TP results were also found between sample vol-ume increase groups and reduction groups(P<0.05). Conclusion Various sampling errors influence ELISA test results to different degrees,and the extent increases with the reduction of standard sample volume.

Objective To describe the clinical characteristics and etiology diagnosis of an outbreak of acute respiratory tract infection in a military camp. Methods Two hundred and twenty-five cases were investigated using unified epidemiological questionnaires to describe the epidemiological characteristics. The etiological tests of 30 pharynx swab specimen were performed. The serum neutralized antibodies of 52 patients in acute and convalescence phases were detected by neutralization test. The patients and their close contacts were isolated. Air, stuffs and ground were all disinfected. Results Two hundred and twenty-five cases were distributed all the camp with obvious dormitory aggregation and the aggregation rate was 44. 9%. Among the 225 cases, all cases had fever and 161 (71.6%) had cough, 111 (49.3%) had pharyngalgia, 102 (45.3%) had headache, 31 (13.8%) had chest stuffy and 4(1. 8%) had dyspnea. Twenty (66. 7%) phargnxswab specimens turned to be adenorirus gene positive by polymerase chain reaction. Pharynx swab specimens were cultured in HepG2, Hela, RD and Vero cells, and 16 (53. 3%) presented with cytopathic changes. IgM antibody screening demonstrated that 24 cases were infected with Adenovirus, and neutralization test showed that antibodies increased ≥4 folds in paired sera from 28 cases. During 10 days after patient isolation and general disinfection, there was no new case of Adenovirus infection. Conclusions This outbreak of acute respiratory tract infection in a military camp was caused by Adenovirus, Timely andreasonable preventing measures can control the epidemic quickly.

Abstract: Objective　Quantitative assessment of risk factors of clonorchiasis can provide prevention for clonorchiasis. Methods　Articles were retrieved in Chinese and English electronic databases from January 1, 2000 to December 31, 2020, including Wanfang Data, CNKI, PubMed, Web of Science, Embase. All studies were screened based on inclusion and exclusion criteria, and the quality of all enrolled literatures was evaluated. The software RevMan version 5.3 was used for Meta-analysis. The heterogeneity, sensitivity and publication bias of all included studies were analyzed. Results　A total of 95 articles were retrieved, and 6 were included in this Meta-analysis which were case-control studies. There were 5 articles in Chinese and 1 in English. There was no single literature with a large impact on the results, and the results of this study were relatively stable. There were 1 170 cases of clonorchiasis in total and 1 291 cases in control. Most of the cases were from hospital patients and community residents, and the floating population was small. Meta-analysis showed that there were three independent risk factors: raw or semi-raw fish, raw or semi-raw shrimp, mix raw and cooked cutting boards, with a combined OR (95%CI) of 2.32(1.86, 2.88), 3.99(2.42, 6.58), 2.18(1.51, 3.14), respectively, with low heterogeneity consistent with the results of the total sample study: I2 values for risk factors were 30%, 12%, 27%, respectively. The results of bias tests showed no publication bias (P=0.731, 0.725, 0.334, P>0.05). Conclusions　The key risk factors of clonorchiasis are raw or semi-raw fish, raw or semi-raw shrimp, mix raw and cooked cutting boards. Guidance and health education should be strengthened. It is necessary to strengthen the surveillance of clonorchiasis in the floating population, such as traveler, businessman and student.

Aged ; Female ; Fibroma ; pathology ; Fibroma, Ossifying ; pathology ; Gingival Neoplasms ; pathology ; Humans

OBJECTIVETo evaluate clinical efficacy of suture anchors in treating acute injuries of medial collateral ligament (MCL) of knee at degree III.

METHODSTwenty-seven patients with degree III acute MCL injuries of knee were treated with suture anchors from January 2007 to June 2011. There were 15 males and 12 females, aged from 19 to 56 (averaged 32.6) years old. The time from injury to operation was 3 to 10 days, averaged 6 days. Symptoms and physical signs before and after treatment were observed, Lysholm scoring were used to evluated clinical efficacy.

RESULTSAll patients were followed up from 16 to 30 months with an average of 21.6 months. The stability of knee joints was good in all patients. Abduction stress test was negative when the knee joint was straightened at 0 degrees and flexed at 30 degrees. The average degree of flexed knee (67.00 +/- 5.80) degrees preoperatively was lower than that of postoperatively (136.50 +/- 6.30) degrees at 1 year. According to Lysholm scoring, preoperative scores ranged from 30 to 43 points, averaged 36.46 +/- 1.48; 1 year after operation ranged from 87 to 100 with an average of 91.50 +/- 3.80 and higher than postoperative. Twenty patients got an excellent results, 5 good and 2 fair.

CONCLUSIONSuture anchors in treating acute injuries of medial collateral ligament of knee at degree III has following advantages: small range of tissue dissection, easy to operate, reliable fixation and less complications.

Acute Disease ; Adult ; Collateral Ligaments ; injuries ; surgery ; Female ; Humans ; Knee Injuries ; surgery ; Male ; Middle Aged ; Suture Anchors

Adult ; Bile Duct Neoplasms ; diagnosis ; metabolism ; pathology ; surgery ; Bile Ducts, Intrahepatic ; Carcinoma, Hepatocellular ; metabolism ; pathology ; Carcinoma, Squamous Cell ; diagnosis ; metabolism ; pathology ; surgery ; Cholangiocarcinoma ; diagnosis ; metabolism ; pathology ; surgery ; Cholecystectomy ; methods ; Diagnosis, Differential ; Hepatectomy ; methods ; Humans ; In Situ Hybridization ; Keratin-19 ; metabolism ; Keratin-7 ; metabolism ; Keratin-8 ; metabolism ; Magnetic Resonance Imaging ; Male ; RNA, Viral ; metabolism ; Tomography, X-Ray Computed

Background and Objective:B7-H1,a member of B7 family,is expressed in tumor cells and has emerged as an important immune modulator capable of suppressing host immunity by inhibiting T cells function.This study was to probe into the correlation between the expression level of B7-H1 protein in pancreatic carcinoma tissues and clinicopathological characteristics and prognosis.Methods:The expression of B7-H1 was measured in 40 cases of pancreatic carcinoma tissues and 10 cases of normal corresponding paracaroinoma tissues by immunohistochemistry.The relationship between the expression level of B7-H1 and clinicopathological characteristics and survival was analyzed.Results:The positive rate of B7-H1 was significantly higher in the tumor tissues [45.00%(18/40)]than in the normal corresponding paracarcinoma tissues[0(0/10)](P<0.05);moreover,B7-H1 expression was significantly associated with the staging of tumor and preoperative serum CA19-9 level(P<0.05).The multivariate cox proportional hazards regression analysis of prognostic factors for overall survival and relapse-free survivalshowed that the expression of B7-H1 was an independent factor for poor prognosis.Conclusion: B7-H1 protein was expressed in human pancreatic carcinoma tissues,and was associated with the prognosis.

Objective To investigate the relationship between marital status and prevalence of peripheral arterial disease (PAD) among Beijing residents.Methods From May to August 2007,10 054 residents were interviewed to collect demographic and biochemistry information.Generalized linear mixed model was used to determine the relationship between marital status and prevalence of PAD in terms of OR and corresponding 95％ confidence intervals.Results After adjusting the traditional risk factors including age,area,lipid,serum glucose,blood pressure,central obesity,smoking,drinking and physical activities for PAD,relationship between marital status and prevalence of PAD was found both at the female and male groups of those with 45 years or older.Compared with married men,OR and 95％ confidence interval of PAD for unmarried men were 1.56 (0.39 - 6.35 ) and 1.61 (0.77 - 3.35 ) for those with 45 years younger and older respectively,while compared with married women,OR and 95％ confidence interval of PAD for unmarried women were 0.75 ( 0.22 - 2.57 ) and 1.78 ( 1.23 - 2.58 ) for those with 45 years younger and older respectively.Significant differences ( all P ＜ 0.01 ) were found between married and unmarried women of 45 years or older in terms of age,waist circumstances,systolic blood pressure,fasting glucose,total cholesterol,low-density lipoprotein and smoking.Conclusions Peripheral arterial disease was related to marital status for women of 45 years or older among Beijing residents.Estrogen level and the distribution of other PAD risk factors might contribute to the observed finding.

OBJECTIVETo explore and identify the non-coding RNAs related to tumors.

METHODSWe used RT-PCR and Northern blot to analyze non-coding RNAs in tumor tissues and cell lines.

RESULTSTwo predicted non-coding RNAs were confirmed to be expressed in cancer tissues and cell lines by RT-PCR and DNA sequencing. We detected the expression of two non-coding RNA transcripts by Northern blot. The length of NC28 was about 1800 nt, and that of NC119 was about 1200nt.

CONCLUSIONSNC28 and NC119 have a tumor-associated expression pattern. The non-coding RNAs may play a role in the development of tumors.

Cell Line, Tumor ; Humans ; Neoplasms ; metabolism ; RNA, Untranslated ; biosynthesis

Objective To explore the relationship and interaction of elevated fasting glucose and hypertension on cardiocerebral vascular disease.Methods 10 054 males and females were recruited for our cross-sectional study during May 2007 to August 2007.Unconditional logistic regression was used to analysis the relationship between fasting glucose and hypertension on cardiocerebral vascular disease.A product of fasting glucose and hypertension was added to the logistic regression model to evaluate the multiplicative interaction and relative excess risk of interaction(RERI),attributable proportion(AP)of interaction and synergy index(S)was applied to evaluate the additive interaction of the two factors.Bootstrap was used to calculate 95％ confidence intervals(CI)of RERI,AP and S.Results After adjusting age,gender,smoking,drinking,body mass index(BMI)and region,the product of fasting glucose and hypertension was not statistically significant,which means there was no multiplicative interaction between the two.But the additive indexes RERI,AP and S with 95％ CI of diabetes and hypertension were 0.64(0.03,1.25),0.27(0.01,O.47)and 1.83(1.02,5.13)respectively,which means significant additive interaction was shown between the two on cardiovascular disease but not no stroke.And there were no additive interaction bmtween impaired fasting glucose on cardiovascular disease or stroke.Conclusions Hypertension was independently related to cardiovascular disease and stroke in Beijing citizens,and diabetes were independently related to stroke.There was additive interaction between diabetes and hypertension on cardiovascular disease.