黄曲霉毒素B1金标检测体系建立过程中的影响因素

详细研究了纳米金标记免疫检测体系建立过程中的影响因素，包括检测带的信号强度、封闭试剂，纳米金探针的浓度、包被试剂A和B的浓度、纳米金溶胶的颗粒尺寸，及检测过程中的化学体系等。通过参数优化，确立了建立快速、简易的金标试剂条检测方法的最佳条件。探针溶液中加入保护试剂K后，试剂条的稳定性有明显的提高，常温下试剂条保存期可达120d（信噪比保留70％以上）。     

产程中阴道检查代替肛门检查的临床观察

目的 探讨在产程的观察过程中使用碘伏消毒行阴道检查替代肛门检查的临产观察.方法 在产程观察过程中使用使用-山东利尔康碘伏消毒液,其有效碘含量在4.5~5.5/15%的碘伏消毒会阴部行阴道检查(以下用5%的碘伏或碘伏表示).结果 310例产妇无一人感染,可靠率100%.结论 在产程观察过程中,使用5%的碘伏消毒会阴部行阴道检查替代肛门检查在临产上是可以使用的.     

Effectiveness of 2 Pretreatment Methods in Antifogging of Goggles in a COVID-19 Isolation Ward: A Randomized Controlled Trial

IntroductionThis study aimed to compare the effectiveness of the pretreatment of goggles with iodophor solution and antibacterial hand sanitizer to reduce the fogging of goggles.MethodsA total of 90 health care workers were divided into a control group (n = 30), an iodophor solution group (n = 30), and an antibacterial hand sanitizer group (n = 30). This study evaluated the degree of fogging of goggles and the light transmission, comfort, eye irritation, and the impact of goggles on the medical work of staff.ResultsThe antibacterial hand sanitizer group had the lowest amount of goggle fogging and the most transparent view. Participants in the control group reported the worst light transmission and comfort level, followed by the iodophor solution group. In contrast, the goggles in the antibacterial hand sanitizer group had the best light transmission and comfort level. The iodophor solution group participants reported more eye irritation. Participants in the control group reported that the goggles severely impacted their medical work, with a less severe impact reported by the iodophor solution group. The antibacterial hand sanitizer group did not report any impact on their medical work.DiscussionWhen the goggles were internally coated with antibacterial hand sanitizer solution (diluted 1:1 with distilled water), the antifog effect was significant. Moreover, the goggles treated with antibacterial hand sanitizer had a clearer field of vision, were reported as non-irritating to the eyes, and significantly improved the efficiency of COVID-19 health care workers, including emergency nurses and providers.     

Serum vitamin D status in type 2 diabetic patients from Gaza Strip

ObjectiveTo assess serum vitamin D status and its relations to other biochemical parameters in type 2 diabetic patients from Gaza Strip.Materials and methodsThis case-control study included 58 type 2 diabetic patients as well as 58 non-diabetic controls. Patients and controls were matched for age and gender. Data were obtained from questionnaire interview, and biochemical analysis of blood samples.ResultsSerum vitamin D was significantly lower in diabetic patients compared to non-diabetic controls (25.9 ± 11.0 versus 34.6 ± 13.8 ng/dl, % difference = 28.8%, P < 0.001). The number of patients having vitamin D deficient, insufficient and sufficient were 6 (10.4%), 35 (60.3%) and 17 (29.3%) compared to controls of 3 (5.2%), 16 (27.6%) and 39 (67.2%), respectively (χ² = 14.672, P < 0.001). Serum glucose, glycated hemoglobin (HbA1c), serum alanine aminotransferase (ALT), aspartate aminotransferase (AST) and triglycerides were significantly higher in patients than in controls whereas serum insulin, high density lipoprotein cholesterol (HDL-C) and calcium were significantly lower in patients. Serum vitamin D showed significant negative correlations with HbA1c (r = ? 0.186, P = 0.046), ALT (r = ? 192, P = 0.040) and AST (r = ? 0.188, P = 0.044) whereas significant positive correlations were found with HDL-C (r = 0.188, P = 0.044) and calcium (r = 0.239, P = 0.010).ConclusionThe significant negative and positive correlations of vitamin D with HbA1c and calcium, respectively suggests that vitamin D supplementation would be of potential therapeutic value in clinical settings for controlling of type 2 diabetes and more importantly its complications. However, a well-designed clinical trials are needed to define the contribution of vitamin D status and therapy in the global diabetes problem.     

单纯机械性菌斑控制对学龄前儿童变形链球菌的短期影响

目的评价用牙刷和牙线进行机械性菌斑控制对学龄前儿童变形链球菌的影响。方法检查者单盲的随机对照临床研究。将54名唾液中检出变形链球菌的3岁学龄前儿童纳入该研究,随机分为实验组和对照组。菌斑染色后,口腔医学生给实验组儿童用牙刷和牙线彻底清洁牙面菌斑,不用牙膏,每天一次,共10次。用Dentocult SMStrip mutans(D-SM)监测唾液中变形链球菌的水平。结果 10次机械性菌斑控制结束后,实验组的D-SM值由基线的1.82下降到0.95(P<0.001),干预结束后2周D-SM值上升到1.62。对照组D-SM值的波动无统计学意义。结论连续、彻底的单纯机械性菌斑控制能降低学龄前儿童变形链球菌水平,干预结束后该作用消失。     

A convenient immunochromatographic test strip for rapid diagnosis of yellow head virus infection in shrimp

A simple yellow head virus (YHV) “strip test” was developed using monoclonal antibody Y19 (against the p20 structural protein) conjugated with colloidal gold as the detector antibody. Rabbit anti-recombinant p20 (rp20) protein antibody was used as a capture antibody at the test line (T) and goat anti-mouse IgG antibody (GAM) was used as the capture antibody at the control line (C). The ready-to-use strip was housed in a plastic case for convenient application and stored in the desiccated plastic bag. A sample volume of 100 μl of either haemolymph or gill or appendage homogenates in application buffer was applied to the sample chamber at one end of the strip and allowed to flow by chromatography through the nitrocellulose membrane to the other end. In test samples containing YHV, the virus would bind to colloidal gold conjugated monoclonal antibody and the resulting complex would be captured by the rabbit anti-rp20 antibody at the test line to give a reddish-purple band. Any unbound monoclonal antibody conjugated with colloidal gold moved across the test line to be captured by the GAM to form a band at the control line (C). In the sample without YHV or below the limit of detection for the kit, only the control line was demonstrated. This method was about 500 times less sensitive than that of one-step RT-PCR, but slightly more sensitive than dot blotting. Therefore, it could be used for primary screening of individual shrimp or pooled shrimp samples to confirm high levels of YHV infection or YHV disease outbreaks. This kit can be used to detect gill associated virus (GAV) infection as well since the monoclonal antibody used in this kit cross-reacted well with GAV. The beneficial features of this kit are that simple, convenient, and rapid results that can be obtained without the requirement of sophisticated tools or special skills.     

两种皮肤消毒液对青霉素皮试结果的影响

目的 观察0．5％碘伏与75％乙醇两种皮肤消毒方法对青霉素皮试结果的影响。方法 选择2004年6月-2006年6月内科住院患者500例，分组间对照组（n=250）及自身对照组（n=250）进行研究。观察0．5％碘伏和75％乙醇两种皮肤消毒液作青霉素皮试后出现的假阳性率。结果 组间对照组及自身对照组青霉素皮试假阳性率。75％乙醇消毒分别为10．8％和12％；0．5％碘伏消毒均为0．8％（P〈0．05）。结论 0．5％碘伏替代75％乙醇作青霉素皮试消毒液可减少青霉素皮试假阳性反应的发生，有助于更好地判断皮试结果。     

超声引导下经皮穿刺联合碘伏注射治疗肾囊肿的应用研究

目的探讨超声引导下经皮穿刺联合碘伏注射治疗肾囊肿的疗效及应用价值。方法选取143例肾囊肿患者,随机分为两组,分别行超声引导下经皮穿刺联合碘伏注射治疗肾囊肿(为试验组,70例),以及超声引导下经皮穿刺联合无水酒精注射治疗肾囊肿(为对照组,73例),并于术后1周、3月、12月对比观察两组的治疗效果及并发症。结果术后1周、3月、12月,两组总有效率对比均具有统计学意义(P<0.05)。结论超声引导下经皮穿刺联合碘伏注射治疗肾囊肿具有疗效好、创伤小、方便经济等优点,可以作为基层医院肾囊肿的首选治疗方法,值得临床推广应用。     

Accuracy of Reverse Dot-Blot PCR in Detection of Different β-Globin Gene Mutations

Prevention programs for β-thalassemia based on molecular diagnosis of heterozygous carriers and/or patients require the use of reliable mutation screening methods. The aim of this study was to compare between direct DNA sequencing, and reverse dot-blot PCR in detection of different β-globin gene mutations in Egyptian children with β-thalassemia. Forty children with β-thalassemia were subjected to mutation analysis, performed by both direct DNA sequencing and β-globin Strip Assay MED™ (based on reverse dot-blot PCR). The most frequent mutant alleles detected by reverse dot-blot PCR were; IVSI-110 G>A (31.25 %), IVS I-6 T > C (21.25 %), and IVS I-1 G>A (20 %). Relatively less frequent mutant alleles detected by reverse dot-blot PCR were “IVSII-1 G>A (5 %), IVSII-745 C>G (5 %), IVSII-848 C>A (2.5 %), IVSI-5 G>C (2.5 %), -87 C>G(2.5 %), and cd39 C>T (2.5 %)”, While the genotypes of three patients (6 alleles 7.5 %) were not detected by reverse dot-blot PCR. Mutant alleles detected by direct DNA sequencing were the same as reverse dot-blot PCR method except it revealed the genotypes of 3 undetected patients (one patient was homozygous IVSI-110 G>A, and two patients were homozygous IVS I-1 G>A. Sensitivity of the reverse dot-blot PCR was 92.5 % when compared to direct DNA sequencing for detecting β-thalassemia mutations. Our results therefore suggest that, direct DNA sequencing may be preferred over reverse dot-blot PCR in critical diagnostic situations like genetic counseling for prenatal diagnosis.