Coagulation test, in principle, is an immunodiagnostics technique, in which immunoglobuline G of antibody is bound to protein A from Staphylococcus aureus. The aim of study is to develop a rapid test kit for detecting...Coagulation test, in principle, is an immunodiagnostics technique, in which immunoglobuline G of antibody is bound to protein A from Staphylococcus aureus. The aim of study is to develop a rapid test kit for detecting iridovirus infection in fish. Method was summarized as follows： （1） vaccine of iridovirus was injected to rabbit four times with a dosage as 0.5 mL, 1 mL, 2mL, 3 mL each week. Serum was collected at the fifth week as a coagglutination test kit; （2） through the positif polymerase chain reaction （PCR） test, the kidney and spleen sample infected with iridovirus are homogenized by using the phosphate buffered saline （PBS） solution of pH 7.2 with ratio 1：2 （WN）; （3） the supernatant material is collected after centrifugation at 8,000 rpm for 15 min; （4） filtrate/supernatant from sample was dropped on a slide an added with coagglutination test kit with the same volume （l：l）; （5） the agglutination observation is done after the 30, 60 and 90 min incubate at room temperature. The coagglutination test gave positive result in 25% of the test samples.展开更多
Objective To evaluate the efficacy of homodimer neutrophil gelatinase-associated lipocalin(H-NGAL)rapid test kit in diagnosing peritoneal dialysis(PD)-associated peritonitis(PDAP).Methods It was a multicenter prospect...Objective To evaluate the efficacy of homodimer neutrophil gelatinase-associated lipocalin(H-NGAL)rapid test kit in diagnosing peritoneal dialysis(PD)-associated peritonitis(PDAP).Methods It was a multicenter prospective observational study.The PD patients from the nephrology clinics or wards at four hospitals,i.e.,the First Affiliated Hospital of Nanchang University,the Third Hospital of Hebei Medical University,Taian Central Hospital,and Weifang People's Hospital from December 27,2021,and July 18,2022 were enrolled.The patients were categorized into PDAP and non-PDAP groups based on whether PDAP occurred at the time of enrollment.PD effluent sampleswerecollected,andH-NGAL test was performed.The patients or their families used cassette type,strip-type,and pen-type H-NGAL test kits to detect H-NGAL.Healthcare professionals only used the cassette-type H-NGAL kit to detect H-NGAL.All participants completed a questionnaire regarding the instructions for use of H-NGAL kit before testing,and a summaryof patient experienceandevaluation questionnaires after testing.The sensitivity,specificity,compliance rate,and 95%confidence interval(CI)of H-NGAL rapid test kit for diagnosing PDAP were calculated using clinical diagnosis as the standard.Kappa test was used to assess the consistency between HNGAL detection results and clinical diagnoses.Results A total of 221 PD patients were enrolled,with 42 PDAP patients and 179 non-PDAP patients.The sensitivity and specificity of H-NGAL rapid test kit for diagnosing PDAP were 100%(95%CI 91.62%-100%)and 99.44%(95%CI 96.90%-99.90%),respectively,with accuracy rate of 99.55%(95%CI 97.48%-99.92%).The positive agreement rate was 97.67%(95%CI 87.94%-99.59%),and the negative agreement rate was 100%(95%CI 97.89%-100%).The consistency evaluation results showed that kappa value was 0.985(95%CI 0.956-1.000).The results obtained by patients and their families using the H-NGAL rapid test kits were consistent across all three methods(cassette,strip,and pen-type H-NGAL test kits),and the results obtained by using the H-NGAL rapid test kits were also consistent between nonhealthcare professionals and healthcare professionals.The kit instruction questionnaire and the experience and evaluation questionnaireshowed that theoverall satisfaction of patients with the H-NGAL rapid test kits was very good.Conclusion H-NGAL rapid test kit exhibits high sensitivity and specificity in diagnosing PDAP and can serve as a rapid diagnostic method for PDAP.展开更多
It is the need of time that oil palm farmers must perform the spatially planned soil analysis to know about the fertilizer sufficient and deficient zones of land.Colorimetric method is a suitable and fast solution of ...It is the need of time that oil palm farmers must perform the spatially planned soil analysis to know about the fertilizer sufficient and deficient zones of land.Colorimetric method is a suitable and fast solution of soil analysis for NPK determination using the digital soil test kit.NPK determination procedure with a digital soil test kit was undefined for oil palm.Furthermore,the digital soil test kit determines the passage of light through an opaque medium of soil solution with a specified reagent.Therefore,environmental light may interfere leading to wrong results of NPK measurement.Likewise,this equipment was non-incorporable with the controller of any VRT fertilizer applicator.In this research,these issues were addressed and the NPK measurement procedure was defined for oil palm plantation by modifying the‘soil to water’ratio in sample soil solution with an optimum environmental light range of 18-23 W/m^(2).‘Soil to water’ratios were found for nitrogen,phosphorus and potassium as 0.31 to 5.00,1.00 to 5.00 and 4.50 to 5.00,respectively to fit the requirement of NPK for oil palm in the prescribed range of the equipment.Validation study of modified digital soil test kit showed that 91.7%N,89.6%P and 93.8%K results of modified digital soil test kit were matched with analytical laboratory method.Thus,the reliability of NPK results using digital soil test kit was enhanced,making the kit incorporable with the controller of variable rate fertilizer applicator through remote monitoring based data acquisition system.The outcome of this research can be used in the development of an IoT network data fusion for dynamic assessment of the NPK variation in the soil and nutrient management in oil palm plantations.展开更多
Mixed anhydride(MA)was used to conjugate ractopamine(RAC)to BSA and obtained artificial antigen BSA-RAC identified by UV and SDS-PAGE.Balb/c mice were immunized with BSA-RAC and hybridoma lines that secrete RAC monocl...Mixed anhydride(MA)was used to conjugate ractopamine(RAC)to BSA and obtained artificial antigen BSA-RAC identified by UV and SDS-PAGE.Balb/c mice were immunized with BSA-RAC and hybridoma lines that secrete RAC monoclonal antibody(mAb)were generated with cell fusion.A ciELISA kit for detection of RAC(RAC-Kit)was developed with RAC mAb and its performance were tested.The results indicated that BSA-RAC was successfully synthesized and its conjugation ratio of RAC to BSA was about 24.5∶1.Three hybridoma lines were filtered and the best one was 4D8-3E11,its affinity constant(Ka)was 1.65×1010 L/mol.The limit of detection of RAC-Kit was 0.5 ng/ml and its detection range was 0.5-184 ng/ml.The mean recoveries of RAC spiked in feed were 85.6% and in swine urine were 88.6%.The precision and accuracy of the assay as determined by inter-assay and intra-assay coefficient variation were below 15%.It had 9.4% cross-reactivity(CR%)to dobutamine and little or no CR to other compounds.The validity of RAC-Kit in 4 ℃ was in 180 d.展开更多
AIM: To investigate whether differences in the rapidity of a positive result for Helicobacter pylori can save res ources, by comparing two commercially available urease kits. METHODS: One hundred and eighty-five adult...AIM: To investigate whether differences in the rapidity of a positive result for Helicobacter pylori can save res ources, by comparing two commercially available urease kits. METHODS: One hundred and eighty-five adults (130 outpatients, 55 inpatients) undergoing gastroscopy were entered prospectively. Patients were divided into two groups: Group 1 (if they were not on PPIs, antibiotics, H2A, bismuth or sucralfate for up to 14 d prior to the endoscopy) and Group 2 (if they were on, or had been on, any of the above medication in the previous 14 d). At endoscopy two sets of biopsies, taken in random order, were placed in the wells of the Campylobacter-like organism (CLO) test (Kimberly-Clark, Utah, USA) and the Quick test (Biohit Plc, Helsinki, Finland). Five additional gastric biopsies were taken for histology/Giemsa and immunohistochemical study. The two urease test slides were read at 2 min, 30 min, 2 h and 24 h. Sensitivity and specif icity at 24 h were determined. RESULTS: At 24 h, for all patients, there was no difference in sensitivity (100% vs 97.5%), specificity (99.3%), positive (97.5%) and negative predictive values (100% vs 99.3%) between the CLO and Quick tests, respectively. There was a positive result at 30 min in 17/41 (41.5%) CLO tests, and in 28/40 (70%) Quick tests, P = 0.05. Quick test enabled the prescription of eradication therapy before discharge in all 28/40 patients. Only 12 (30%) follow-up appointments were needed. If the CLO test had been used alone, only 17 (41.5%) prescriptions would have been possible prior to discharge and 24 (58%) follow-up appointments would be needed (P = 0.001). Of 2000 gastroscopies performed annually at our unit, a saving of 123 follow-up appointments (total: 8856 Euros or 11 808 USD) would be achieved if we switched to the Quick test. CONCLUSION: Direct comparison of locally available urease test kits is worthwhile, since the appropriate choice results in a significant saving of resources. Local costs and follow-up protocols will determine the magnitude of these savings.展开更多
目的探讨AmpFlSTRIdentifiler Plus Kit PCR Reagents混合液使用时间和温度的影响因素。方法试剂盒PCR混合液依次在4℃、室温、-20℃下保存1周、2周至15周不等,用于样品STR分型检验。结果4℃保存的PCR混合液在15周之内可以检验出标...目的探讨AmpFlSTRIdentifiler Plus Kit PCR Reagents混合液使用时间和温度的影响因素。方法试剂盒PCR混合液依次在4℃、室温、-20℃下保存1周、2周至15周不等,用于样品STR分型检验。结果4℃保存的PCR混合液在15周之内可以检验出标准品9947A的STR分型;室温保存在6周之内可以检出;-20℃保存至少在15周内可以检出。结论由AmpFlSTR Identifiler Plus Kit PCR Reagents试剂盒各组分组成的试剂盒PCR混合液在一定的保存条件下使用是可行的,符合法庭科学人类荧光标记STR技术要求。展开更多
目的评估Latex Test BL-2 P-FDP纤维蛋白(原)降解产物试剂盒分别在Sysmex CA7000和CS5100全自动凝血仪上的性能。方法根据美国临床实验室标准化研究所(CLSI)系列文件和其他相关文献的实验方案,对两套系统的不精密度、准确度、线性范围...目的评估Latex Test BL-2 P-FDP纤维蛋白(原)降解产物试剂盒分别在Sysmex CA7000和CS5100全自动凝血仪上的性能。方法根据美国临床实验室标准化研究所(CLSI)系列文件和其他相关文献的实验方案,对两套系统的不精密度、准确度、线性范围、携带污染率、参考范围、检测下限和抗干扰试验、方法学比对等性能进行验证分析。结果不精密度与准确度均在允许范围内,表明验证通过。线性验证实测均值与预测值偏离均<15%,符合要求。CA7000和CS5100 2台仪器检测FDP的携带污染率均为0%,符合要求。CA7000和CS5100分析FDP的检测下限结果分别为(2.63±0.28)μg/ml、(2.64±0.07)μg/ml,均在2μg/ml^3μg/ml,符合要求。对Latex Test BL-2 P-FDP试剂盒在CA7000和CS5100 2套检测系统的检测结果进行相关回归分析,y=0.881x+1.811,r=0.987(P>0.05),2个检测系统间结果一致性较好。结论 Latex Test BL-2 P-FDP试剂盒应用在Sysmex CA7000和CS5100全自动凝血仪测定时的主要性能指标,已达到临床检测需求。展开更多
文摘Coagulation test, in principle, is an immunodiagnostics technique, in which immunoglobuline G of antibody is bound to protein A from Staphylococcus aureus. The aim of study is to develop a rapid test kit for detecting iridovirus infection in fish. Method was summarized as follows： （1） vaccine of iridovirus was injected to rabbit four times with a dosage as 0.5 mL, 1 mL, 2mL, 3 mL each week. Serum was collected at the fifth week as a coagglutination test kit; （2） through the positif polymerase chain reaction （PCR） test, the kidney and spleen sample infected with iridovirus are homogenized by using the phosphate buffered saline （PBS） solution of pH 7.2 with ratio 1：2 （WN）; （3） the supernatant material is collected after centrifugation at 8,000 rpm for 15 min; （4） filtrate/supernatant from sample was dropped on a slide an added with coagglutination test kit with the same volume （l：l）; （5） the agglutination observation is done after the 30, 60 and 90 min incubate at room temperature. The coagglutination test gave positive result in 25% of the test samples.
文摘Objective To evaluate the efficacy of homodimer neutrophil gelatinase-associated lipocalin(H-NGAL)rapid test kit in diagnosing peritoneal dialysis(PD)-associated peritonitis(PDAP).Methods It was a multicenter prospective observational study.The PD patients from the nephrology clinics or wards at four hospitals,i.e.,the First Affiliated Hospital of Nanchang University,the Third Hospital of Hebei Medical University,Taian Central Hospital,and Weifang People's Hospital from December 27,2021,and July 18,2022 were enrolled.The patients were categorized into PDAP and non-PDAP groups based on whether PDAP occurred at the time of enrollment.PD effluent sampleswerecollected,andH-NGAL test was performed.The patients or their families used cassette type,strip-type,and pen-type H-NGAL test kits to detect H-NGAL.Healthcare professionals only used the cassette-type H-NGAL kit to detect H-NGAL.All participants completed a questionnaire regarding the instructions for use of H-NGAL kit before testing,and a summaryof patient experienceandevaluation questionnaires after testing.The sensitivity,specificity,compliance rate,and 95%confidence interval(CI)of H-NGAL rapid test kit for diagnosing PDAP were calculated using clinical diagnosis as the standard.Kappa test was used to assess the consistency between HNGAL detection results and clinical diagnoses.Results A total of 221 PD patients were enrolled,with 42 PDAP patients and 179 non-PDAP patients.The sensitivity and specificity of H-NGAL rapid test kit for diagnosing PDAP were 100%(95%CI 91.62%-100%)and 99.44%(95%CI 96.90%-99.90%),respectively,with accuracy rate of 99.55%(95%CI 97.48%-99.92%).The positive agreement rate was 97.67%(95%CI 87.94%-99.59%),and the negative agreement rate was 100%(95%CI 97.89%-100%).The consistency evaluation results showed that kappa value was 0.985(95%CI 0.956-1.000).The results obtained by patients and their families using the H-NGAL rapid test kits were consistent across all three methods(cassette,strip,and pen-type H-NGAL test kits),and the results obtained by using the H-NGAL rapid test kits were also consistent between nonhealthcare professionals and healthcare professionals.The kit instruction questionnaire and the experience and evaluation questionnaireshowed that theoverall satisfaction of patients with the H-NGAL rapid test kits was very good.Conclusion H-NGAL rapid test kit exhibits high sensitivity and specificity in diagnosing PDAP and can serve as a rapid diagnostic method for PDAP.
基金This research was supported by Universiti Putra Malaysia in coordination of United Melaka Bhd.(UMB).
文摘It is the need of time that oil palm farmers must perform the spatially planned soil analysis to know about the fertilizer sufficient and deficient zones of land.Colorimetric method is a suitable and fast solution of soil analysis for NPK determination using the digital soil test kit.NPK determination procedure with a digital soil test kit was undefined for oil palm.Furthermore,the digital soil test kit determines the passage of light through an opaque medium of soil solution with a specified reagent.Therefore,environmental light may interfere leading to wrong results of NPK measurement.Likewise,this equipment was non-incorporable with the controller of any VRT fertilizer applicator.In this research,these issues were addressed and the NPK measurement procedure was defined for oil palm plantation by modifying the‘soil to water’ratio in sample soil solution with an optimum environmental light range of 18-23 W/m^(2).‘Soil to water’ratios were found for nitrogen,phosphorus and potassium as 0.31 to 5.00,1.00 to 5.00 and 4.50 to 5.00,respectively to fit the requirement of NPK for oil palm in the prescribed range of the equipment.Validation study of modified digital soil test kit showed that 91.7%N,89.6%P and 93.8%K results of modified digital soil test kit were matched with analytical laboratory method.Thus,the reliability of NPK results using digital soil test kit was enhanced,making the kit incorporable with the controller of variable rate fertilizer applicator through remote monitoring based data acquisition system.The outcome of this research can be used in the development of an IoT network data fusion for dynamic assessment of the NPK variation in the soil and nutrient management in oil palm plantations.
基金Supported by the Key Project of National Science and Technology Surporting Plan during 11th-Five-Year of China(2006BAK02A21/1)~~
文摘Mixed anhydride(MA)was used to conjugate ractopamine(RAC)to BSA and obtained artificial antigen BSA-RAC identified by UV and SDS-PAGE.Balb/c mice were immunized with BSA-RAC and hybridoma lines that secrete RAC monoclonal antibody(mAb)were generated with cell fusion.A ciELISA kit for detection of RAC(RAC-Kit)was developed with RAC mAb and its performance were tested.The results indicated that BSA-RAC was successfully synthesized and its conjugation ratio of RAC to BSA was about 24.5∶1.Three hybridoma lines were filtered and the best one was 4D8-3E11,its affinity constant(Ka)was 1.65×1010 L/mol.The limit of detection of RAC-Kit was 0.5 ng/ml and its detection range was 0.5-184 ng/ml.The mean recoveries of RAC spiked in feed were 85.6% and in swine urine were 88.6%.The precision and accuracy of the assay as determined by inter-assay and intra-assay coefficient variation were below 15%.It had 9.4% cross-reactivity(CR%)to dobutamine and little or no CR to other compounds.The validity of RAC-Kit in 4 ℃ was in 180 d.
文摘AIM: To investigate whether differences in the rapidity of a positive result for Helicobacter pylori can save res ources, by comparing two commercially available urease kits. METHODS: One hundred and eighty-five adults (130 outpatients, 55 inpatients) undergoing gastroscopy were entered prospectively. Patients were divided into two groups: Group 1 (if they were not on PPIs, antibiotics, H2A, bismuth or sucralfate for up to 14 d prior to the endoscopy) and Group 2 (if they were on, or had been on, any of the above medication in the previous 14 d). At endoscopy two sets of biopsies, taken in random order, were placed in the wells of the Campylobacter-like organism (CLO) test (Kimberly-Clark, Utah, USA) and the Quick test (Biohit Plc, Helsinki, Finland). Five additional gastric biopsies were taken for histology/Giemsa and immunohistochemical study. The two urease test slides were read at 2 min, 30 min, 2 h and 24 h. Sensitivity and specif icity at 24 h were determined. RESULTS: At 24 h, for all patients, there was no difference in sensitivity (100% vs 97.5%), specificity (99.3%), positive (97.5%) and negative predictive values (100% vs 99.3%) between the CLO and Quick tests, respectively. There was a positive result at 30 min in 17/41 (41.5%) CLO tests, and in 28/40 (70%) Quick tests, P = 0.05. Quick test enabled the prescription of eradication therapy before discharge in all 28/40 patients. Only 12 (30%) follow-up appointments were needed. If the CLO test had been used alone, only 17 (41.5%) prescriptions would have been possible prior to discharge and 24 (58%) follow-up appointments would be needed (P = 0.001). Of 2000 gastroscopies performed annually at our unit, a saving of 123 follow-up appointments (total: 8856 Euros or 11 808 USD) would be achieved if we switched to the Quick test. CONCLUSION: Direct comparison of locally available urease test kits is worthwhile, since the appropriate choice results in a significant saving of resources. Local costs and follow-up protocols will determine the magnitude of these savings.
文摘目的探讨AmpFlSTRIdentifiler Plus Kit PCR Reagents混合液使用时间和温度的影响因素。方法试剂盒PCR混合液依次在4℃、室温、-20℃下保存1周、2周至15周不等,用于样品STR分型检验。结果4℃保存的PCR混合液在15周之内可以检验出标准品9947A的STR分型;室温保存在6周之内可以检出;-20℃保存至少在15周内可以检出。结论由AmpFlSTR Identifiler Plus Kit PCR Reagents试剂盒各组分组成的试剂盒PCR混合液在一定的保存条件下使用是可行的,符合法庭科学人类荧光标记STR技术要求。
文摘目的评估Latex Test BL-2 P-FDP纤维蛋白(原)降解产物试剂盒分别在Sysmex CA7000和CS5100全自动凝血仪上的性能。方法根据美国临床实验室标准化研究所(CLSI)系列文件和其他相关文献的实验方案,对两套系统的不精密度、准确度、线性范围、携带污染率、参考范围、检测下限和抗干扰试验、方法学比对等性能进行验证分析。结果不精密度与准确度均在允许范围内,表明验证通过。线性验证实测均值与预测值偏离均<15%,符合要求。CA7000和CS5100 2台仪器检测FDP的携带污染率均为0%,符合要求。CA7000和CS5100分析FDP的检测下限结果分别为(2.63±0.28)μg/ml、(2.64±0.07)μg/ml,均在2μg/ml^3μg/ml,符合要求。对Latex Test BL-2 P-FDP试剂盒在CA7000和CS5100 2套检测系统的检测结果进行相关回归分析,y=0.881x+1.811,r=0.987(P>0.05),2个检测系统间结果一致性较好。结论 Latex Test BL-2 P-FDP试剂盒应用在Sysmex CA7000和CS5100全自动凝血仪测定时的主要性能指标,已达到临床检测需求。
