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Matrix Type Influences the Levels of Soluble Immune Checkpoints 基质类型影响可溶性免疫检查点的水平。
IF 2.9 4区 医学 Q2 MEDICAL LABORATORY TECHNOLOGY Pub Date : 2025-12-29 DOI: 10.1002/jcla.70153
Veronica Buia, Martina Bonacini, Cecilia Catellani, Alessandro Rossi, Francesco Muratore, Carlo Salvarani, Alessandro Zerbini, Stefania Croci

Background

Soluble immune checkpoints (sICs) are emerging as possible serum and plasma biomarkers in cancer and immune-mediated diseases, but little is known about the impact of the matrix type in sIC detection. This study aimed to assess whether sIC measurements are comparable between serum and EDTA-plasma samples.

Methods

A cohort of 38 healthy subjects was enrolled. A multiplex bead-based assay was used to evaluate a panel of 17 sICs (CD137, 4-1BBL, CD27, CTLA4/CD152, CD80, CD40, CD40L, GITR, GITRL, ICOSL, IDO, LAG3, PD-1, PD-L1, PD-L2, TIM3, and VISTA) in paired serum and plasma-EDTA samples. The detection frequencies, concentrations, and correlations of each sIC were analyzed by comparing the two matrices.

Results

Soluble CD137, CD152, CD40, and LAG3 were detected more frequently in plasma, while soluble CD40L was detected predominantly in serum. The concentrations of soluble 4-1BBL, CD27, PD-1, VISTA were higher in plasma, while the concentrations of soluble PD-L2 were higher in serum. The concentrations of soluble CD80, GITR, GITRL, ICOSL, IDO, and TIM3 were comparable between serum and plasma. Soluble CD27, CD80, GITRL showed a significant positive, slight correlation between plasmatic and serum concentrations.

Conclusion

Except for soluble CD80, the detection of the other sICs by the bead-based assay was influenced by the matrix type. The evaluation of the best matrix for sICs should be considered before starting clinical studies.

背景:可溶性免疫检查点(sICs)正在成为癌症和免疫介导疾病的可能的血清和血浆生物标志物,但对基质类型在sIC检测中的影响知之甚少。本研究旨在评估血清和edta血浆样品之间的sIC测量是否具有可比性。方法:选取38名健康受试者。采用基于多重头的检测方法评估配对血清和血浆edta样本中的17种化学物质(CD137、4-1BBL、CD27、CTLA4/CD152、CD80、CD40、CD40L、GITR、GITRL、ICOSL、IDO、LAG3、PD-1、PD-L1、PD-L2、TIM3和VISTA)。通过比较两种基质,分析了每种sIC的检测频率、浓度和相关性。结果:血浆中以可溶性CD137、CD152、CD40和LAG3的检出率较高,血清中以可溶性CD40L的检出率较高。血浆中可溶性4-1BBL、CD27、PD-1、VISTA浓度较高,血清中可溶性PD-L2浓度较高。血清和血浆中可溶性CD80、GITR、GITRL、ICOSL、IDO和TIM3的浓度具有可比性。可溶性CD27、CD80、GITRL与血浆和血清浓度呈显著正相关。结论:除可溶性CD80外,其他可溶性CD80的检测均受基质类型的影响。在开始临床研究之前,应该考虑评估最佳基质。
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引用次数: 0
Analytical Comparison of Three Commercial Lysing Reagents for Full-Spectrum Flow Cytometric Immunophenotyping 三种商用全谱流式细胞免疫分型裂解试剂的分析比较。
IF 2.9 4区 医学 Q2 MEDICAL LABORATORY TECHNOLOGY Pub Date : 2025-12-28 DOI: 10.1002/jcla.70140
Elizabeth Huamanyalli-Villar, Julia Moya-Naranjo, Billy Sanchez-Jacinto, Julio Espíritu-Antezano, Jaime Rosales-Rimache

Introduction

Flow cytometry (FC) enables rapid identification of cell lineages based on their fluorescent and light-scattering properties, playing a critical role in diagnosing and monitoring oncohematological diseases. Standardization of procedures in spectral FC is essential for method validation studies.

Methods

We designed a comparative study using 21 blood samples from healthy donors. Three commercial lysing solutions used in spectral FC immunophenotyping were evaluated. Samples were stained with a panel of eight antibody-conjugated fluorochromes and aliquoted for assessment with each lysing solution (Excellyse I, Excellyse Easy, and Tombo RBC Lysis Buffer), following the manufacturers' protocols. Data acquisition was performed using a full-spectrum flow cytometer.

Results

An average cell loss of 31.4% was observed, with no statistically significant differences between lysing solutions, although Excellyse I showed lower cell loss under the no-wash protocol. This reagent also achieved superior resolution in distinguishing lymphocytes from debris. It demonstrated the lowest coefficients of variation in both scatter and fluorescence parameters of leukocyte populations, highlighting its ability to preserve the optical characteristics of stained cells. RBC-T performed well in specific channels such as APC and PE-Cy7, whereas Excellyse Easy produced a resolution comparable to Excellyse I, albeit with greater signal dispersion.

Conclusion

Excellyse I demonstrated the best overall performance, with greater cell preservation, clearer population resolution, and lower variability in scatter and fluorescence. Nonetheless, Excellyse Easy may still be considered a viable alternative.

导语:流式细胞术(FC)能够根据细胞的荧光和光散射特性快速鉴定细胞谱系,在血液肿瘤疾病的诊断和监测中发挥着关键作用。光谱FC过程的标准化对于方法验证研究至关重要。方法:我们设计了一项比较研究,使用21份健康献血者的血液样本。评估了光谱FC免疫分型中使用的三种商业裂解液。样品用八种抗体偶联荧光染料染色,并按照制造商的方案,用每种裂解溶液(Excellyse I、Excellyse Easy和Tombo RBC Lysis Buffer)进行评估。使用全谱流式细胞仪进行数据采集。结果:平均细胞损失率为31.4%,尽管在无洗涤方案下,Excellyse I的细胞损失率较低,但在裂解液之间没有统计学差异。该试剂在区分淋巴细胞和碎片方面也取得了优异的分辨率。它证明了最低的变异系数在散射和白细胞群体的荧光参数,突出其能力,以保持染色细胞的光学特性。RBC-T在APC和PE-Cy7等特定通道中表现良好,而Excellyse Easy的分辨率与Excellyse I相当,尽管信号色散更大。结论:Excellyse I表现出最佳的综合性能,具有更好的细胞保存,更清晰的群体分辨率,散射和荧光变异性更低。尽管如此,Excellyse Easy可能仍然被认为是一个可行的选择。
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引用次数: 0
The Application Value of Bronchoalveolar Lavage Fluid Metagenomic Next-Generation Sequencing in Moderate-to-Severe Bronchiectasis 支气管肺泡灌洗液宏基因组新一代测序在中重度支气管扩张中的应用价值。
IF 2.9 4区 医学 Q2 MEDICAL LABORATORY TECHNOLOGY Pub Date : 2025-12-28 DOI: 10.1002/jcla.70156
Jiachun Li, Qiuping Quan, Junshan Chen, Xiaoyun Jian, Weijie Zhan, Jingmin Wang, Rongbin Jiang

Background

Bronchiectasis, a leading chronic airway disease, often worsens due to infections, making rapid pathogen detection crucial. This study aims to evaluate the diagnostic value of bronchoalveolar lavage fluid (BALF) metagenomic next-generation sequencing (mNGS) in identifying pathogens in moderate-to-severe bronchiectasis and compare its advantages to conventional methods.

Methods

Fifty-two hospitalized patients initially diagnosed with moderate-to-severe bronchiectasis at Foshan Hospital of Traditional Chinese Medicine from May 2022 to March 2024 were enrolled. Clinical data and BALF samples were collected and subjected to both mNGS and conventional pathogen detection methods. The differences and concordance in pathogen distribution between mNGS and conventional methods, as well as their diagnostic performance, were compared.

Results

The positive detection rate of pathogens by mNGS was significantly higher than that by conventional methods (p < 0.01). Both methods predominantly identified bacterial pathogens, with Pseudomonas aeruginosa being the most common bacterium and Aspergillus fumigatus the most frequent fungus. However, mNGS detected a broader range of pathogens and demonstrated superior sensitivity in identifying mixed infections (p < 0.01). The sensitivity of mNGS was 66% higher than that of conventional methods (p < 0.01), and the complete concordance rate between the two methods in double-positive cases was 41.18%. Additionally, mNGS-guided anti-infection treatment significantly improves patient symptoms, reduces hospital stays, and lowers costs (p < 0.05).

Conclusions

Compared with conventional methods, BALF mNGS demonstrates higher sensitivity, a greater positive detection rate, superior capability in identifying mixed infections, improved diagnostic performance, and a better guiding effect on anti-infection treatment in moderate-to-severe bronchiectasis.

背景:支气管扩张是一种主要的慢性气道疾病,经常因感染而恶化,因此快速检测病原体至关重要。本研究旨在评估支气管肺泡灌洗液(BALF)宏基因组新一代测序(mNGS)对中重度支气管扩张病原体的诊断价值,并比较其与传统方法的优势。方法:选取2022年5月至2024年3月佛山市中医院首发诊断为中重度支气管扩张的住院患者52例。收集临床资料和BALF样本,并采用mNGS和常规病原体检测方法进行检测。比较了mNGS与常规方法病原菌分布的差异性和一致性,并对其诊断效果进行了比较。结果:mNGS对病原菌的阳性检出率明显高于常规方法(p)。结论:与常规方法相比,BALF mNGS具有更高的敏感性、更高的阳性检出率、更强的混合感染识别能力,提高了诊断效能,对中重度支气管扩张的抗感染治疗具有更好的指导作用。
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引用次数: 0
Frequency and Associated Factors of Clotted and Hemolyzed Samples in South Gonder Hospitals, Ethiopia: A Multicenter Cross-Sectional Study, 2023 埃塞俄比亚南贡德医院凝血和溶血样本的频率及相关因素:一项多中心横断面研究,2023。
IF 2.9 4区 医学 Q2 MEDICAL LABORATORY TECHNOLOGY Pub Date : 2025-12-27 DOI: 10.1002/jcla.70148
Birhanemaskal Malkamu, Getaneh Atikilt Yemata, Andargachew Almaw, Ayenew Assefa, Birhanu Getie, Teklehaimanot Kiros, Mulat Erkihun, Shewaneh Damtie, Tegenaw Tiruneh, Berhanu Abebaw Mekonnen, Meron Asmamaw Alemayehu, Abraham Teym, Abathun Temesgen, Gashaw Melkie Bayeh, Almaw Genet Yeshiwas, Rahel Mulatie Anteneh, Melkamu Aderajew Zemene, Tesfaneh Shimels, Chalachew Yenew, Wolde Melese Ayele, Ahmed Fentaw Ahmed, Assefa Andargie Kassa, Tilahun Degu Tsega, Chalachew Abiyu Ayalew, Sintayehu Simie Tsega, Zeamanuel Anteneh Yigzaw, Amare Genetu Ejigu, Wondimnew Desalegn Addis, Getasew Yirdaw, Kalaab Esubalew Sharew, Daniel Adane, Samuel Berihun Dagnew, Gebyaw Arega, Habitamu Mekonen

Background

Accurate hematological analysis relies heavily on the integrity of blood samples, which can be compromised by pre-analytical errors such as hemolysis and clotting. This study aimed to determine the frequency and associated factors of clotted and hemolyzed samples in selected hospitals in South Gonder, Ethiopia.

Methods

This institutionally based cross-sectional study was conducted from September to December 2023 in northwestern Ethiopia at the medical hematology laboratories of selected South Gonder Zone hospitals. Debre Tabor's specialized referral hospital was selected. Addis Zemen and Nefas Mewcha primary hospitals were chosen at random.

Results

Among the 2331 test samples, 829 (35.6%) were clotted, and 269 (11.5%) were hemolyzed. We found a significant association of clotting with contamination, inadequate sample volume, puncture site other than the median cubital region, more than three attempts to collect blood, and the use of a partially filled collection tube when attempting another vein puncture.

Conclusion

On the basis of our observations, the findings presented here have a significant impact on patient diagnosis and treatment, leading to delayed or inaccurate diagnoses, inappropriate treatment decisions, increased risk of adverse events, and increased healthcare costs.

背景:准确的血液学分析在很大程度上依赖于血液样本的完整性,而血液样本的完整性可能会因分析前错误(如溶血和凝血)而受到损害。本研究旨在确定埃塞俄比亚南贡德尔选定医院中凝血和溶血样品的频率和相关因素。方法:这项基于机构的横断面研究于2023年9月至12月在埃塞俄比亚西北部选定的南贡德尔区医院的医学血液学实验室进行。选择了Debre Tabor的专科转诊医院。随机选择亚的斯亚贝门和内法斯-梅查两所初级医院。结果:2331份检测标本中,凝血829份(35.6%),溶血269份(11.5%)。我们发现凝血与污染、样本量不足、除肘正中区以外的穿刺位置、超过三次尝试采血以及在尝试另一次静脉穿刺时使用部分填充的收集管有显著关联。结论:根据我们的观察,本文的研究结果对患者的诊断和治疗有重大影响,导致延迟或不准确的诊断,不适当的治疗决策,不良事件风险增加,医疗费用增加。
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引用次数: 0
Evaluation of a Six Sigma-Based Dynamic Quality Control Strategy for Hematology Analysis: A Multicenter Study 血液学分析中基于六西格玛的动态质量控制策略的评价:一项多中心研究。
IF 2.9 4区 医学 Q2 MEDICAL LABORATORY TECHNOLOGY Pub Date : 2025-12-21 DOI: 10.1002/jcla.70138
Bo Liu, Zhaodong Sun, Kaiyong Chen, Na Wang, Jibao Qin, Dengli Feng, Fumeng Yang, Jiaping Wang, Huiyi Wu, Ming Hu

Background

Quality control (QC) is critical for ensuring the accuracy and reliability of hematology testing. Traditional QC strategies, however, are often limited in their ability to provide timely detection of analytical errors and to adapt to complex, real-world laboratory conditions.

Methods

In this multicenter study, we applied the Six Sigma quality management framework to systematically evaluate the performance of five hematology parameters (Hb, WBC, RBC, HCT, and PLT). To enhance QC monitoring, we established a dynamic quality control strategy that integrates moving average (MA) monitoring with a long short-term memory (LSTM) predictive model. Patient sample data were incorporated alongside routine QC data to validate clinical adaptability.

Results

Sigma metrics revealed marked performance differences among the parameters, with Hb and WBC achieving world-class or excellent performance (σ ≥ 6), while PLT showed relatively lower stability. The combined MA–LSTM approach significantly improved sensitivity for error detection while reducing false positives compared with conventional rule-based QC. The dynamic model demonstrated robust predictive ability, enabling real-time QC monitoring across multiple laboratory sites.

Conclusion

By combining Six Sigma evaluation, MA monitoring, and LSTM modeling, we propose a dynamic QC strategy that overcomes key limitations of conventional quality control methods. This approach provides laboratories with an intelligent, proactive, and clinically adaptable solution for improving the reliability of hematology testing and ensuring higher quality patient care.

背景:质量控制(QC)是确保血液学检测的准确性和可靠性的关键。然而,传统的质量控制策略在提供及时检测分析错误和适应复杂的真实实验室条件方面往往受到限制。方法:在这项多中心研究中,我们应用六西格玛质量管理框架系统评估五项血液学参数(Hb、WBC、RBC、HCT和PLT)的表现。为了加强质量控制,我们建立了一种动态质量控制策略,将移动平均(MA)监测与长短期记忆(LSTM)预测模型相结合。将患者样本数据与常规QC数据合并以验证临床适应性。结果:Sigma指标显示各参数的性能差异显著,Hb和WBC达到世界级或优秀(σ≥6),而PLT的稳定性相对较低。与传统的基于规则的QC相比,结合MA-LSTM方法显着提高了错误检测的灵敏度,同时减少了误报。动态模型显示了强大的预测能力,可以实现跨多个实验室站点的实时QC监控。结论:通过将六西格玛评价、MA监测和LSTM建模相结合,我们提出了一种动态质量控制策略,克服了传统质量控制方法的主要局限性。这种方法为实验室提供了一种智能的、主动的、临床适应性强的解决方案,以提高血液学检测的可靠性,并确保更高质量的患者护理。
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引用次数: 0
A Rapid Colorimetric Method for Determining Calcium, Inorganic Phosphorus, and Zinc in Human Milk Using Clinical Laboratory Reagents 用临床实验室试剂快速测定人乳中钙、无机磷和锌的比色法。
IF 2.9 4区 医学 Q2 MEDICAL LABORATORY TECHNOLOGY Pub Date : 2025-12-21 DOI: 10.1002/jcla.70146
Miori Tanaka, Misaki Mochida, Midori Date, Katsumi Mizuno

Background

Calcium (Ca), inorganic phosphorus (IP), and zinc (Zn) are essential minerals in human milk for infant growth and health. Current methods for determining minerals in human milk, including inductively coupled plasma atomic emission spectroscopy (ICP-AES), are time-consuming and laborious. This study aimed to measure Ca, IP, and Zn in human milk by a rapid, simple, and accurate method using clinical laboratory reagents based on a colorimetric assay.

Methods

71 pooled donor human milk (DHM) samples were collected after Holder pasteurization. The only pretreatment required was dilution, and samples were diluted 5-fold. Ca, IP, and Zn concentrations were measured by colorimetric assay using an automated analyzer. The results were validated in terms of repeatability, recovery, and comparison with ICP-AES.

Results

The coefficients of variation for intra-assay precision were 0.7%–1.9% for Ca, 1.5%–2.1% for IP, and 0.8%–7.4% for Zn. The recovery rates ranged from 104.1% to 104.9% for Ca, 96.3%–103.4% for IP, and 94.5%–103.2% for Zn with high, medium, and low concentrations. There were significant correlations between Ca, IP, and Zn levels determined by colorimetric assay and Ca, total P, and Zn levels determined by ICP-AES (Ca: r = 0.944, IP: r = 0.463, and Zn: r = 0.949, p < 0.001, n = 58).

Conclusion

These results confirm the precision and accuracy of the colorimetric assay using clinical laboratory reagents for determining Ca, IP, and Zn levels in human milk. Its use may contribute to the rapid and easy provision of appropriate DHM to preterm infants.

背景:钙(Ca)、无机磷(IP)和锌(Zn)是母乳中对婴儿生长和健康至关重要的矿物质。目前测定母乳中矿物质的方法,包括电感耦合等离子体原子发射光谱(ICP-AES),耗时且费力。本研究旨在利用临床实验室试剂基于比色法快速、简单、准确地测定人乳中的钙、IP和锌。方法:收集71份经霍尔德巴氏消毒后的供乳样本。唯一需要的预处理是稀释,样品被稀释5倍。Ca, IP和Zn浓度采用自动分析仪比色法测定。结果在重复性、回收率以及与ICP-AES的比较方面得到了验证。结果:Ca、IP、Zn的测定内精密度变异系数分别为0.7% ~ 1.9%、1.5% ~ 2.1%和0.8% ~ 7.4%。在高、中、低浓度条件下,Ca回收率为104.1% ~ 104.9%,IP回收率为96.3% ~ 103.4%,Zn回收率为94.5% ~ 103.2%。比色法测定的Ca、IP、Zn含量与ICP-AES测定的Ca、总P、Zn含量存在显著相关性(Ca: r = 0.944, IP: r = 0.463, Zn: r = 0.949, P)。结论:采用临床实验室试剂进行比色法测定人乳中Ca、IP、Zn含量具有较好的精密度和准确性。它的使用可能有助于快速和容易地提供适当的DHM给早产儿。
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引用次数: 0
Identification of a De Novo MAGEL2 Pathogenic Variant in Schaaf–Yang Syndrome and the Importance of Paternal Allele Confirmation Schaaf-Yang综合征一个新生MAGEL2致病变异的鉴定及父本等位基因确认的重要性。
IF 2.9 4区 医学 Q2 MEDICAL LABORATORY TECHNOLOGY Pub Date : 2025-12-21 DOI: 10.1002/jcla.70152
Youn-Ji Hong, Misun Yang, Hyeon Jeong Kwon, Jooyoung Cha, Ja-Hyun Jang, Sung Eun Wang, Eun Sun Lee, Mi-Ae Jang

Background

Schaaf–Yang syndrome (SYS) is a rare genetic disorder caused by pathogenic variants in MAGEL2, a paternally expressed and maternally imprinted gene on 15q11.2. Genetic diagnosis of SYS is challenging due to clinical features that overlap with those of other rare syndromic disorders and limited clinician awareness regarding the diagnosis of imprinting disorders.

Methods

We present a neonate presenting with respiratory distress and joint contractures, diagnosed with SYS through comprehensive genetic testing. Whole-exome sequencing identified a heterozygous de novo nonsense variant in MAGEL2 c.2092G>T [p.(Gly698Ter)]. To confirm the paternal origin of this variant, methylation-sensitive restriction enzyme digestion followed by long-range PCR, nested PCR, and Sanger sequencing was performed.

Results

The MAGEL2 c.2092G>T was absent in both parents, indicating a de novo mutation. Methylation analysis confirmed that the variant resided on the paternal allele, establishing its pathogenicity. A proband diagnostic approach integrating sequence analysis, parental testing, and methylation assays effectively delineates MAGEL2 variants and their inheritance patterns.

Conclusion

Our study underscores the importance of combining genomic sequencing with methylation assay to accurately diagnose SYS, especially for de novo variants. The proposed diagnostic workflow facilitates reliable identification of pathogenic MAGEL2 mutations and their parental origin, improving diagnostic precision in clinical settings. Further research is needed to elucidate the molecular mechanisms underlying MAGEL2-related disorders and develop targeted therapies.

背景:Schaaf-Yang综合征(SYS)是一种罕见的遗传性疾病,由15q11.2上父亲表达和母亲印迹的基因MAGEL2致病变异引起。由于与其他罕见综合征的临床特征重叠以及临床医生对印迹疾病诊断的认识有限,SYS的遗传诊断具有挑战性。方法:我们报告了一名以呼吸窘迫和关节挛缩为表现的新生儿,通过综合基因检测诊断为SYS。全外显子组测序鉴定出MAGEL2 c.2092G>T的杂合从头无义变异[p.(Gly698Ter)]。为了确认该变异的父系起源,进行了甲基化敏感限制性内切酶酶切,随后进行了远程PCR、巢式PCR和Sanger测序。结果:MAGEL2 c.2092G>T基因在父母双方均缺失,提示为新生突变。甲基化分析证实该变异位于父本等位基因上,确定了其致病性。先证者诊断方法整合了序列分析、亲代检测和甲基化分析,有效地描述了MAGEL2变异及其遗传模式。结论:我们的研究强调了结合基因组测序和甲基化测定来准确诊断SYS的重要性,特别是对于新生变异。提出的诊断工作流程有助于可靠地识别致病性MAGEL2突变及其亲本来源,提高临床诊断的准确性。需要进一步的研究来阐明magel2相关疾病的分子机制并开发靶向治疗。
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引用次数: 0
Modeling Factors Associated With Diarrhea Caused by Cryptosporidium Species Using Machine Learning Methods 使用机器学习方法建模隐孢子虫引起的腹泻相关因素。
IF 2.9 4区 医学 Q2 MEDICAL LABORATORY TECHNOLOGY Pub Date : 2025-12-17 DOI: 10.1002/jcla.70150
Türkan Mutlu Yar, Zeynep Küçükakçali, Ülkü Karaman

Objective

Cryptosporidium spp. is an important pathogen responsible for severe diarrheal illness, especially in children, and is transmitted by various modes. The present work is aimed at categorizing Cryptosporidium spp. infection and determining associated risk factors by ML on a known dataset of diarrhea among children.

Materials and Methods

For classification, we used random forest and bagging CART trees. Model discrimination was measured by accuracy, balanced accuracy, sensitivity, specificity, positive predictive value, negative predictive value, and F1-score. Then, a 5-fold cross-validation method was used to verify the reliability of the model. Importance values were also calculated to identify the most important risk factors for infection.

Results

The bagged CART model emerged as the best among the models applied, with slightly better classification. For this model, performance metrics were: accuracy (87.2%), balanced accuracy (56.3%), sensitivity (97.2%), specificity (15.4%), positive predictive value (89.3%), negative predictive value (42.9%), F1-score (93.0%). As shown by the variable importance analysis, the strongest risk factor was the number of people in the household (people ≥ 5), which represented a higher risk of infection in crowded housings. Sources of water also came up as an important environmental factor; plain tap water and pipe-line water appeared to be major causes of transmission.

Conclusion

Such results indicate that waterborne transmission is the main route of Cryptosporidium spp. infection. These findings underscore the importance of water quality improvements, including efforts to address water disinfection, particularly in areas with household crowding and inadequate sanitation access.

目的:隐孢子虫是引起严重腹泻病,尤其是儿童腹泻病的重要病原体,其传播途径多种多样。目前的工作旨在对隐孢子虫感染进行分类,并在儿童腹泻的已知数据集上通过ML确定相关的危险因素。材料和方法:我们使用随机森林和袋装CART树进行分类。通过准确性、平衡准确性、敏感性、特异性、阳性预测值、阴性预测值和f1评分来衡量模型判别性。然后,采用5重交叉验证法对模型的可靠性进行验证。还计算了重要值,以确定最重要的感染危险因素。结果:袋装CART模型在应用的模型中表现最好,分类稍好。该模型的性能指标为:准确性(87.2%)、平衡准确性(56.3%)、敏感性(97.2%)、特异性(15.4%)、阳性预测值(89.3%)、阴性预测值(42.9%)、f1评分(93.0%)。变量重要性分析显示,最强的危险因素是家庭人数(人数≥5人),这表明在拥挤的住房中感染的风险更高。水源也是一个重要的环境因素;普通自来水和管道水似乎是传播的主要原因。结论:这些结果表明水传播是隐孢子虫感染的主要途径。这些发现强调了改善水质的重要性,包括努力解决水消毒问题,特别是在家庭拥挤和卫生设施不足的地区。
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引用次数: 0
Predictive Role of Hematological Biomarkers in Chronic Kidney Disease Progression 血液学生物标志物在慢性肾脏疾病进展中的预测作用
IF 2.9 4区 医学 Q2 MEDICAL LABORATORY TECHNOLOGY Pub Date : 2025-12-17 DOI: 10.1002/jcla.70142
Collince Odiwuor Ogolla, Lucy W. Karani, Stanslaus Musyoki, Phidelis Maruti

Background

Chronic kidney disease is a progressive disorder of the body with high morbidity. Hematological biomarkers can predict CKD progression.

Objective

This study examined the predictive role of hematological parameters among adult CKD patients.

Methods

The records of 120 adult patients with CKD were retrieved. CKD staging was according to KDIGO guidelines. Hematological parameters were hemoglobin, WBC, percentages of neutrophils and lymphocytes, NLR, platelet count, MCV, and RDW. Data were analyzed to assess associations between hematological markers and disease stage.

Results

Mean age was 56.4 ± 13.2 years, with 56.7% being male. Prevalence was 65.0% for hypertension and 38.3% for diabetes mellitus. There was a significant decrease in hemoglobin with CKD stage (13.4 ± 1.1 g/dL in Stage 1 to 8.5 ± 1.7 g/dL in Stage 5, p < 0.001), while NLR and RDW increased progressively with CKD stage (NLR: 1.55 ± 0.48 to 4.12 ± 1.02; RDW: 13.1% ± 0.8% to 16.0% ± 1.6%, both p < 0.001). Anemia and raised NLR were more frequent in the advanced stages of CKD. Logistic regression analysis identified hemoglobin (OR = 0.69, 95% CI: 0.58–0.82, p < 0.001), RDW (OR = 1.78, 95% CI: 1.33–2.39, p = 0.002), and NLR (OR = 1.91, 95% CI: 1.35–2.72, p = 0.001) as independent predictors of advanced CKD. These simple and inexpensive biomarkers are particularly valuable in resource-limited settings.

Conclusion

Hematological biomarkers, especially hemoglobin, NLR, and RDW, were effectively used to predict the progression of CKD.

背景:慢性肾脏疾病是一种发病率高的进行性疾病。血液学生物标志物可以预测CKD进展。目的:探讨血液学参数在成人CKD患者中的预测作用。方法:回顾性分析120例成人慢性肾病患者的临床资料。CKD分期根据KDIGO指南。血液学参数为血红蛋白、白细胞、中性粒细胞和淋巴细胞百分比、NLR、血小板计数、MCV和RDW。分析数据以评估血液学指标与疾病分期之间的关联。结果:平均年龄56.4±13.2岁,男性56.7%。高血压患病率为65.0%,糖尿病患病率为38.3%。CKD分期血红蛋白显著降低(1期为13.4±1.1 g/dL, 5期为8.5±1.7 g/dL)。结论:血液学生物标志物,特别是血红蛋白、NLR和RDW,可有效预测CKD的进展。
{"title":"Predictive Role of Hematological Biomarkers in Chronic Kidney Disease Progression","authors":"Collince Odiwuor Ogolla,&nbsp;Lucy W. Karani,&nbsp;Stanslaus Musyoki,&nbsp;Phidelis Maruti","doi":"10.1002/jcla.70142","DOIUrl":"10.1002/jcla.70142","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Background</h3>\u0000 \u0000 <p>Chronic kidney disease is a progressive disorder of the body with high morbidity. Hematological biomarkers can predict CKD progression.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Objective</h3>\u0000 \u0000 <p>This study examined the predictive role of hematological parameters among adult CKD patients.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>The records of 120 adult patients with CKD were retrieved. CKD staging was according to KDIGO guidelines. Hematological parameters were hemoglobin, WBC, percentages of neutrophils and lymphocytes, NLR, platelet count, MCV, and RDW. Data were analyzed to assess associations between hematological markers and disease stage.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>Mean age was 56.4 ± 13.2 years, with 56.7% being male. Prevalence was 65.0% for hypertension and 38.3% for diabetes mellitus. There was a significant decrease in hemoglobin with CKD stage (13.4 ± 1.1 g/dL in Stage 1 to 8.5 ± 1.7 g/dL in Stage 5, <i>p</i> &lt; 0.001), while NLR and RDW increased progressively with CKD stage (NLR: 1.55 ± 0.48 to 4.12 ± 1.02; RDW: 13.1% ± 0.8% to 16.0% ± 1.6%, both <i>p</i> &lt; 0.001). Anemia and raised NLR were more frequent in the advanced stages of CKD. Logistic regression analysis identified hemoglobin (OR = 0.69, 95% CI: 0.58–0.82, <i>p</i> &lt; 0.001), RDW (OR = 1.78, 95% CI: 1.33–2.39, <i>p</i> = 0.002), and NLR (OR = 1.91, 95% CI: 1.35–2.72, <i>p</i> = 0.001) as independent predictors of advanced CKD. These simple and inexpensive biomarkers are particularly valuable in resource-limited settings.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusion</h3>\u0000 \u0000 <p>Hematological biomarkers, especially hemoglobin, NLR, and RDW, were effectively used to predict the progression of CKD.</p>\u0000 </section>\u0000 </div>","PeriodicalId":15509,"journal":{"name":"Journal of Clinical Laboratory Analysis","volume":"40 2","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12853397/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145774831","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effects of Spectral Interfering Substances on Light Transmission Platelet Aggregation Using Infrared Based Aggregometer 光谱干扰物质对红外聚集仪光透射血小板聚集的影响。
IF 2.9 4区 医学 Q2 MEDICAL LABORATORY TECHNOLOGY Pub Date : 2025-12-16 DOI: 10.1002/jcla.70151
Manal Ibrahim-Kosta, Gaïa Zirka, Karine Carriere, Philippe Ohlmann, Marie-Christine Alessi

Aim

This study aims to investigate the nature and extent of hemolyzed, icteric, or lipemic (HIL) interference on platelet aggregation (PA) using the TA-8 V aggregometer (Diagnostica Stago, Asnière sur Seine) equipped with a near infrared light source outside the typical absorbance range of HIL.

Methods

Platelet-Rich-Plasma (PRP) samples were spiked with substances mimicking HIL interference: red blood cell hemolysate (RBCH; 0.3–20 g/L of hemoglobin), bilirubin (15–400 mg/L), and a fat emulsion (Intralipid 20%: 0.5–3 g/L). Maximal intensity (MaxInt) and velocity (Vel) were recorded in the basal state and in response to ADP 5 μmol/L and collagen 2 μg/mL. RBCH solution was treated with apyrase 0.1 U/mL.

Results

Spontaneous aggregation appeared above 0.6 g/L RBCH and significantly intensified with increased RBCH concentrations. The addition of apyrase to RBCH prevented spontaneous aggregation regardless of the RBCH concentration and led to reduced interindividual variability. In response to ADP and collagen, MaxInt and Vel significantly decreased as apyrase-treated RBCH concentrations increased. MaxInt and Vel in response to ADP or collagen were not affected by increasing concentrations of bilirubin. The presence of lipids significantly increases MaxInt in response to ADP or collagen starting at 0.5 g/L.

Conclusion

Our findings suggest that PA testing using the TA-8 V instrument is not significantly impacted by icterus and hyperlipidemia within the specified ranges in healthy individuals. However, it is crucial to reject grossly hemolysed samples (exceeding 0.6 g/L) to avoid interference with ADP released from red blood cells. Further research is needed to confirm these results in patients with platelet dysfunction.

目的:本研究旨在利用在典型吸光度范围外配备近红外光源的ta - 8v聚集仪(diagnostics, Stago, asni sur Seine),探讨溶血、黄疸或脂血症(HIL)干扰血小板聚集(PA)的性质和程度。方法:富血小板血浆(PRP)样品中加入模拟HIL干扰的物质:红细胞溶血物(RBCH; 0.3-20 g/L血红蛋白)、胆红素(15-400 mg/L)和脂肪乳(脂内20%:0.5-3 g/L)。在ADP为5 μmol/L、胶原为2 μmol/ mL时,记录细胞在基础状态下的最大强度(MaxInt)和速度(Vel)。用apyrase 0.1 U/mL处理RBCH溶液。结果:RBCH浓度大于0.6 g/L时出现自发聚集,随RBCH浓度的增加自发聚集明显增强。无论RBCH浓度如何,向RBCH中添加apyrase都能阻止自发聚集,并导致个体间变异性降低。在ADP和胶原的作用下,MaxInt和Vel随着apyase处理的RBCH浓度的增加而显著降低。MaxInt和Vel对ADP或胶原蛋白的反应不受胆红素浓度增加的影响。当ADP或胶原浓度为0.5 g/L时,脂质的存在显著增加了MaxInt。结论:我们的研究结果表明,在规定范围内,健康人使用ta - 8v仪检测PA不受黄疸和高脂血症的显著影响。然而,排斥严重溶血的样品(超过0.6 g/L)是至关重要的,以避免干扰从红细胞释放的ADP。在血小板功能障碍患者中证实这些结果还需要进一步的研究。
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引用次数: 0
期刊
Journal of Clinical Laboratory Analysis
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