A total of twenty eight HSV isolates from the patients were typed by using HSV typespecific monoclonal antibodies (McAb). Comparison of typing results with McAb in three Sero-lminunological methods with molecular hybridization indicated 100% concordance in the results. But the typing rates were quite different among the various methods (ELISA 64%, IFA and EIA 82%, Hybridization 100%). The results demonstrate that the molecular hybrydization with HSV type-specific probes was highly sensitive and specific, and the method of EIA with HSV type-specific McAb was accurate, cheap, rapid and practical.

Objective To investigate the change of leptin,nitric oxide (NO) and interleukin-6 (IL- 6) levels in serum of children with Kawasaki disease (KD) and the possible relationship between leptin,NO and IL-6 levels,explore the role of leptin,NO and IL-6 in the pathogenesis of KD.Methods Fourty-five children with KD were studied.Twelve of them had coronary artery lesions and 33 had non-coronary artery lesions;thirty healthy children and 18 children with juvenile idiopathic arthritis or Henoch-Scholeion purpuru were enrolled as control subjects.Serum was collected from each patients during acute stage of KD and remission.Leptin,NO and IL-6 contents were detected by radioimmuno-assay and spectrophotometry and enzyme-linked immunoserbent assay.Meanwhile,C-reactive protein (CRP) were examined.Results ① The concentrations of serum leptin,NO,IL-6 and CRP in children with KD were significantly higher in the acute stage of KD than those at clinical remission and those of the normal control group (q=26.24,25.23; 21.38,31.30;35.37,33.68;16.32,15.66;P＜0.01,respectively).No significant differences in serum leptin, IL-6 and CRP were found between the clinical remission group and the normal control group (q=1.02,1.04, 0.61,P＞0.05,respectively);The concentrations of serum NO were significantly higher at clinical remission group than those of the normal control group (q=11.31,P＜0.01).② There was no significant difference in the concentrations of serum leptin,IL-6 and CRP at the acute stage of KD than those in patients with and without coronary artery lesions (q=1.17,1.92,1.60,P＞0.05).The concentrations of serum NO were significantly higher at the acute stage of KD with coronary artery lesions than those of KD without coronary artery lesions (q=6.91,P＜0.01).③ The concentrations of serum leptin in children with juvenile idiopathic arthritis or Henoch-Scholeion purpura were signifietantly higher than those of the normal control group (t=13.26,P＜ 0.01).No significant differences in serum leptin were found between children with juvenile idiopathic arthritis or Henoch-Seholeion purpura and children with KD (t=1.28,P＞0.05).④ Correlation was found between serum leptin values and levels of the following parameters (P＜0.01);NO (r=0.69),IL-6 (r=0.55),CRP (r=0.42).However,there were no associations between leptin and leukocytes (r=0.21,P＞0.05) or serum albumin level (r=-0.24,P＞0.05).Association was found between serum NO and IL-6 (r=0.45,P＜0.01)or CRP(r=0.49,P＜0.01).Conclusion These results suggest that leptin,NO and IL-6 may have a role in the immunoinflammatory process of KD,especially in the acute phase.Further in vivo and in vitro studies are needed to establish the roles of leptin,NO and IL-6 in the pathogenesis of KD.

Objective To develop a multidimensional self-report health measurement scale for accurate evaluation of health status in Chinese adults. Methods Delphi method was used to select health measurements. Item database was set up based on available questionnaires. A total of 1858 individuals from Beijing, Hebei ,Tianjin, Shanxi and other provinces of China received field pretest. Results A self-report health assessment tool with 90 items was developed, Cronbach a coefficient of which was 0. 669 to 0. 917,split-half reliability 0. 572 to 0. 877, and test-retest reliability 0. 693 to 0. 896. Six factors from exploratory factor analysis accounted for 71.732% total variance,with the common factor＞0.4. Confirmatory factor analysis showed good fit index and construct validity. Conclusion The newly developed self-rated health measurement scale ,which involves six dimensions and 90 items ,shows good reliability and validity.

Objective To compare the yield and speed of detection of Salmonella subsp, enterica serotypo Paratyphi A from the blood of patients with suspected paratyphoid fever A. Methods With the BacT/ALERT 3D system and paired aerobic and anaerobic bottles (AEB, ANB) that were each filled with 5 ml of blood, the blood culture of 13 500 suspected paratyphoid fever A patients were performed. Results A total of 4 060 isolates were detected. About 3 149 were detected from both AEB and ANB. Four hundred and sixty-one isolates were detected only from the AEB and 450 were only from the ANB. The detection rates of the AEB and ANB were all 26.7% (χ<'2>=0.023, P=0.880). The increased detection rate attributed to the additional blood volume in the AEB and ANB were 11.3% and 11.1%, respectively. The detection speed differed between the two medium formulations. The time to detection was (23.66±15.89) h and (25.48±16.92) h for3 149 isolates, respectively (t=7.007, P<0.01).The mean time to detection was 31.80±20. 97 for 461 isolates discovered with AEB and (33.45±20.72) h for 450 isolates discovered with ANB. Conclusion The blood volume is an important factor in determining the detection rate of blood culture. Although no statistical difference for positive rate was found between the AEB and ANB, more isolates was detected earlier in AEB.

Objective To understand the elonal expansion and genetic diversity of Salmonella en-terica semtype Paratyphi A (SPA) and to construct a typing method to determine the epidemic clones of the isolates. Methods Antimicrobial susceptibility testing was performed with 3980 SPA isolates by the cen-trolled Kirby-Bauer disc diffusion technique on Muller-Hinton agar plates. A total of 15 SPA with nalidixie acid resistance for mutations in gyrA, gyrB, gyrC and gyrE genes within the quinolone-resistant determina-tion region (QRDR) were examined. Subtyping of 121 isolates of SPA from seven counties in Yuxi were studied using pulsed-field gel eleetrophoresis (PFGE) analysis following digestion of chromosomal DNA with restriction endanucleases Spe Ⅰ and Xba Ⅰ. PFGE patterns were analyzed by duster analysis. Results The nalidixic acid-susceptible isolates predominated in 1999 but was replaced by nalidixic acid -resistant (NAR) isolates after 2000. Amplification by PCR and sequencing of the genes with subsets of 15 NAR strains re-vealed that the resistance mechanisms had resulted from single point mutations in the gyrA gene. Spe Ⅰ and Xba Ⅰ digestion of 121 isolates gave five and four different PFGE patterns with the predominance of the Spe Ⅰ 01 and Spe Ⅰ 02 (or the Xba Ⅰ 01) epidemic patterns, respectively. Spe Ⅰ 01 and Spe Ⅰ 02 consisted of 37.2% and 57.9% of isolates, respectively, or Xba Ⅰ 01 consisted of 95.0% of isolates. Conclusion The incidence of resistance to nalidixic acid of the isolates increased during the study period. PFGE patterns Spe Ⅰ 01 and Spe Ⅰ 02 (or Xba Ⅰ 01), the main clones of the epidemics, are highly prevalent in Yuxi. PFGE with Spe Ⅰ and Xba Ⅰ is a useful technique to differentiate SPA.

BACKGROUND:Bone marrow mesenchymal stem cel s transplantation can inhibit experimental emphysema inflammatory reaction and apoptosis, and has been experimental y confirmed to treat severe lung function impairment. OBJECTIVE:To explore the inhibitory effects of bone marrow mesenchymal stem cel s transplantation via different ways on inflammatory reaction and apoptosis due to experimental emphysema. METHODS:Female Wistar rats were randomly divided into control group, intravenous group and endotracheal group fol owing model establishment using fumigation plus intratracheal instil ation of porcine pancreatic elastase. In the latter two groups, bone marrow mesenchymal stem cel s from male rats were injected via the tail vein and the trachea, respectively. In the control group, rats were given PBS via he tail vein and trachea. At 14 days after transplantation, pathological changes of rat lung tissues were observed, cel apoptotic index in alveolar wal cel s and tumor necrosis factorαlevel in the bronchoalveolar lavage fluid were detected. RESULTS AND CONCLUSION:Compared with the control group, in the intravenous and endotracheal groups,the pathological changes of lung tissues were relieved, tumor necrosis factorαlevel and apoptosis index were reduced significantly (P<0.01);but there were no differences between the intravenous and endotracheal groups (P>0.05). These findings indicate that bone marrow mesenchymal stem cel s transplantation via the tail vein and trachea both can exert obvious therapeutic effects on emphysema. Moreover, cel transplantation via the tail vein is more convenient and easier than that via the trachea in the treatment of emphysema.

Objective:To investigate the development trend of physical examination volume and revenue in health-checkup institutions in China from 2010 to 2019.Methods:In this longitudinal study, the annual income, annual physical examination volume and other indicators reflecting institutional size were collected with questionnaire from 374 health-checkup institutions in the year of 2010, 2015 and 2019. The geometric mean method is used to calculate the compound annual growth rate (CAGR) of the annual physical examination volume, annual income, mean per capita cost from 2010 to 2015 and 2015 to 2019.Results:The annual physical examination volume of health-checkup institutions increased from 1.81 (1.00, 3.20) ×10 4 person times in 2010 to 5.08(3.50, 7.28)×10 4 person times in 2019; the CAGR of the physical examination volume from 2010 to 2015 was 14.04%(8.14%, 23.78%), and it was 9.49%(3.39%, 19.07%) from 2015 to 2019. The annual revenue increased from 768.73 (350.00, 1 623.75) ×10 4 yuan in 2010 to 3 500.00 (1 997.73, 6 818.54) ×10 4 yuan in 2019; the CAGR of annual revenue from 2010 to 2015 was 25.75% (15.17%, 35.09%), and it was 15.67% (8.78%, 26.11%) from 2015 to 2019. The mean per capita cost increased from 434.26 (278.82, 666.66) yuan in 2010 to 755.80 (506.90, 1 005.42) yuan in 2019; the CAGR of the mean per capita cost was 9.82% (1.71%, 17.10%) from 2010 to 2015, and it was 5.37% (0.95%, 10.46%) from 2015 to 2019. Conclusion:From 2010 to 2019, health-checkup institutions in China developed rapidly, and the CAGR of the annual physical examination volume, annual revenue, mean per capita cost are high.

Objective To compare the image quality of chest low dose CT (LDCT) using automatic exposure control (AEC) and constant current control (CCC) and explore a more reasonable scanning protocol. Methods Two hundred and eighty participants were examined with 64 CT scanner at 7 centers in China. All were divided into 4 groups. Two groups underwent LDCT using AEC with standard deviation set at 25 (A1) and 30 (A2) respectively and the tube current ranged from 10 mA to 80 mA. The other two groups underwent LDCT using CCC with tube current set at 40 mA (C1) and 50 mA (C2) respectively. The axial and MPR images were evaluated by two radiologists who were blinded to the scanning protocols.The radiation dose, noise and the image quality of the 4 groups were compared and analyzed statistically.Differences of radiation dose and noise among groups were determined with variance analysis and t test,image quality with Mann-Whitney test and the consistency of diagnosis with Kappa test. Results There was a significant lower DLP in AEC group than in CCC group [(82.62±40.31)vs ( 110.81±18.21) mGy·cm (F =56. 88 ,P ＜ 0. 01 )], whereas no significant difference was observed between group A2 and group A1 0. 05]. The noisy of AEC group was higher than that of CCC group both on lung window(41.50±9.58 vs 40.86±7.03) and mediastinum window (41.19±7.83 vs 40.92±9.89), but there was no significant difference( Flung =0.835, P=0.476, Fmediastinum =1.910, P=0.128).The quality score of axial image in AEC group was higher than that in CCC group (superior margin of the brachiocephalic vein level: 4.49±0.56 vs4.38±0.64,superior margin of the aortic arch: 4.86±0.23 vs 4.81±0.32,the right superior lobar bronchus Level:4.87±0.27 vs 4. 84 ± 0. 22, the right middle lobar bronchus Level: 4.90±0.25 vs 4.88±0.21) except on the right inferior pulmonary vein level(4. 92 ±0. 25 vs 4. 93 ±0. 17) and superior margin of the left diaphragmatic dome level (4. 91±0.27 vs 4.93±0.22) on lung window, but no significant differences (F=0.076-1.748, P＞0.05) were observed. A significant higher score in AEC group was observed on mediastinum window compared with CCC group on superior margin of brachiocephalic vein level (2.57±0.77 vs 2. 46 ± 0. 59, F = 8. 459, P ＜ 0. 05 ), however, the score of AEC group was lower than that of CCC group on other levels without significant differences (superior margin of the aortic arch:3.36 ±0. 63 vs 3.45 ±0. 60,the right superior lobar bronchus level: 3.94 ±0. 56 vs 3. 95 ±0. 51 ,the right middle lobar bronchus Level: 3.80 ±0. 58 vs 3. 87 ±0. 50,the right inferior pulmonary vein level: 3.72 ±0. 56 vs 3.78 ±0. 53, superior margin of the left diaphragmatic dome level: 3.58 ± 0.63 vs 3.68±0.56,F=0.083-3.380,P ＞ 0.05 ). The MPR image quality of AEC group was better than that of CCC group both on lung window and mediastinum window (Zlung =-2.258, Zmedlastinum=-1.330, P＞0.05). For all participants including the underweighted group, the normal group and the overweighted group, the image quality of A1 group was better than that of A2 group without significant differences (the underweighted group: Zlung=0.000, P=1.000, Zmedastinum= 0.000, P=1.000;the normal group: Zlung =-0.062, P=0.950, Zmediastinum =-0.746, P = 0.456; the overweighted group: Zlung = - 1.177, P = 0.239,Zmediastinum =-1.715, P=0.144) both on lung and mediastinum windows, and for the higher BMI participants, a better image quality was obtained in A1 group than in A2 group on the mediastinum window (Z = -1. 715, P = 0. 144). Conclusions The total radiation exposure dose of AEC group is significantly lower than that of CCC group, but no statistical significant differences are observed between both groups in image quality and noise level. The AEC technique is highly recommended in thoracic LDCT scan for screening program, and the SD25 ( SD value = 25) scan protocol is suggested for higher BMI population while the SD30 (SD value = 30) scan protocol for lower BMI population.

OBJECTIVETo study the bone marrow microvessel density (MVD) and vascular endothelial growth factor (VEGF) expression and their clinical significance in patients with aplastic anemia (AA).

METHODSBone marrow biopsies in 51 newly diagnosed patients with AA were evaluated the MVD and VEGF expression by immunostaining with anti-factor VIII related antigen and VEGF monoclonal antibodies at regular time points after immunosuppressive therapy (IT).

RESULTSThe mean bone marrow MVD in AA group was 5.5 +/- 3.5, being significantly lower than that in normal control group (8.7 +/- 3.4, P < 0.05). MVDs of SAA and NSAA patients were 7.4 +/- 2.9 and 4.3 +/- 3.4, respectively, being significantly different (P < 0.01). The VEGF expression in AA group was significantly lower than that in control group [(6.7 +/- 8.4)% vs (14.7 +/- 6.1)%, P < 0.01], but there was no difference between SAA and NSAA. Bone marrow MVD and VEGF were significantly increased after IT in 22 responded AA patients.

CONCLUSIONBone marrow MVD and VEGF expression are low in AA patients which may be one of pathophysiologic mechanisms of bone marrow failure in AA. Proangiogenic and ameliorating microcirculation agents together with IT might accelerate the recovery of hematopoiesis in AA patients.

Adolescent ; Adult ; Anemia, Aplastic ; metabolism ; pathology ; Bone Marrow ; blood supply ; metabolism ; Child ; Female ; Humans ; Male ; Microvessels ; pathology ; Middle Aged ; Neovascularization, Pathologic ; Vascular Endothelial Growth Factor A ; metabolism

Objectives To screen the high-risk population of stroke in China using color Doppler flow imaging (CDFI)and to establish a stroke risk prediction model in Chinese population in order to prevent and treat stroke early. Methods Forty-one base hospitals and 715 286 people in the project areas of the first 6 provinces of China conducted routine physical examinations and investigated the related risk factors for cardiocerebrovascular diseases from July 2011 to April 2012 using a cross-sectional study,among them 61 860 patients underwent carotid CDFI screening,and 49 386 of them were high-risk population (exposed to≥3 risk factors). The bilateral common carotid interma-media thickness (IMT),the number of plaques and the degree of carotid stenosis were screened and documented. And whether carotid IMT thickening or not,with or without carotid plaques,and degree of carotid artery stenotic rate 0-49% and≥50% were performed by multivariate logistic regression analysis with the risk factors for stroke,respectively. Results (1)Logistic regression analysis showed that hypertension,atrial fibrillation,smoking,and lack of physical exercise were the independent risk factors for carotid IMT thickening (hypertension:OR,1. 17;95%CI 1. 12-1. 22;atrial fibrillation:OR,1. 15;95%CI 1. 09-1. 21;smoking:OR,1. 13;95%CI 1. 08-1. 17;and lack of physical exercise:OR,1. 12;95%CI 1.08-1. 16). (2)Hypertension,atrial fibrillation, smoking,and diabetes were the independent risk factors for carotid plaque and carotid artery stenosis rate≥50%(carotid plaque,hypertension:OR,1. 55;95%CI 1. 47-1. 62;atrial fibrillation:OR,1. 13;95%CI 1.06-1. 21;smoking:OR,1. 16;95%CI 1. 11-1. 22;and diabetes:OR,1. 30;95%CI 1. 24-1. 37). Carotid stenosis rate≥50%,hypertension:OR,1. 78;95%CI 1.55-2. 03;atrial fibrillation:OR,1. 59;95%CI 1. 39-1. 81;smoking:OR,1. 33;95%CI 1. 20-1. 48;and diabetes:OR,1. 30;95%CI 1. 17-1. 45. Simple obesity did not increase the incidences of carotid atherosclerotic plaque and carotid artery stenosis ≥50%(OR,0. 78, 0.83;95%CI 0. 75-0. 82 ,0. 75-0. 92,respectively). Conclusions Neck vascular ultrasound can be used as a valuable means for screening high-risk population and detecting risk factors of stroke. It has an important clinical significance for the early diagnosis and treatment of carotid atherosclerosis disease.