CD64联合C-反应蛋白及降钙素原检测在新生儿败血症的临床研究

目的 研究CD64联合C-反应蛋白(C-reactive protein,CRP)及降钙素原(procalcitonin, PCT)检测对新生儿败血症临床诊断的意义.方法 选取福建医科大学附属福州市第一医院儿科2015年3月至2016年6月收治的经临床确诊为新生儿败血症的70例患儿为败血症组、35例非感染性疾病患儿为非感染组、40例健康新生儿为健康对照组.通过流式细胞仪检测各组新生儿血液CD64,全自动生化分析仪检测血清CRP和PCT,并进行对比分析.结果 败血症组新生儿全血CD64、血清CRP和PCT均显著高于非感染组和健康对照组新生儿(P<0.05);CD64、CRP和PCT联合诊断败血症的敏感性和特异性分别为97.14%和96.00%,均高于3项指标单独诊断新生儿败血症的敏感性和特异性.结论 联合检测CD64、CRP和PCT可以提高新生儿败血症诊断的特异性,为临床早期诊断提供依据.     

败血症新生儿血中性粒细胞CD64表达的意义

目的 探讨中性粒细胞CD64对新生儿败血症早期诊断、病情判断、预后分析的价值.方法 败血症组36例在入院初及恢复期采空腹静脉血,应用流式细胞术测定中性粒细胞CD64,同时行外周血CRP测定;非感染组22例和健康对照组26例一次性采血,采用同样方法测定其血CD64和CRP.结果 败血症组CD64水平为(60.37±22.70)MFI,显著高于非感染组[(27.91±4.91)MFI]和对照组[(23.14±5.10)MFI](Pa＜0.01),恢复期水平下降.以CD64≥35 MFI为阳性标准,中性粒细胞CD64对新生儿败血症诊断的敏感度95.7%、特异度95.8%,均优于CRP.结论 中性粒细胞CD64可作为新生儿败血症早期诊断、病情判断的可靠指标.     

������ϸ��CD����64����CD����11b������ڪ���������Ѫ֢����еļ�ֵ

目的 探讨中性粒细胞CD11b、CD64在新生儿败血症诊断中的价值.方法 2005年1月至2005年12月检测河北医科大学第一医院儿科36例败血症新生儿及26名健康新生儿中性粒细胞CD64、CD11b的表达水平和CRP质量浓度,比较各指标对诊断新生儿败血症的灵敏度、特异度、阳性预测值、阴性预测值和约登指数,评价它们对诊断该病的价值.结果 (1)败血症组CD64、CD11b水平均明显高于对照组(P＜0.01);(2)以CD64≥35MFI,CD11b≥1300MFI,CRP≥8mg/L为阳性标准,三指标对诊断败血症的灵敏度分别为95.7%、82.6%、69.6%,CD64的特异度95.8%、阳性预测值95.6%、阴性预测值95.4%、约登指数91.5%;(3)CD11b、CD64水平在治疗前后差异有显著意义,P均＜0.01.结论 中性粒细胞CD11b、CD64可作为新生儿败血症早期诊断、判断病情的可靠指标.     

CD64、降钙素原在新生儿败血症诊断中的价值

目的探讨CD64、血清降钙素原(PCT)在新生儿败血症诊断中的价值。方法败血症组36例在入院初及恢复期采空腹静脉血,应用流式细胞术测定CD64、应用固相免疫色谱法测定PCT,同时行外周血C-反应蛋白(CRP)测定,并在入院接受抗生素治疗前作血培养。非感染组22例和健康对照组26例一次性采血测定CD64、PCT和CRP。结果败血症组CD64水平为(60.37±22.70)平均荧光强度(MFI),明显高于对照组的(23.14±5.10)MFI(P<0.01);败血症组PCT水平为(24.12±20.37)μg/L,明显高于对照组的(0.30±0.19)μg/L(P<0.01);恢复期CD64、PCT水平均明显下降(P均<0.01)。以CD64≥35 MFI、PCT≥0.5μg/L、CRP≥8 mg/L为阳性标准,三项指标对诊断新生儿败血症的敏感度分别为95.7%、94.4%、69.6%,特异度分别为95.8%、84.6%、75.0%。结论 CD64、PCT可作为新生儿败血症早期诊断、判断病情的重要指标。     

CD64在新生儿败血症中的诊断价值

目的 探讨外周血中性粒细胞CD64表达水平对新生儿败血症的诊断价值.方法 2008年10月至2012年8月本院新生儿病房收治的新生儿败血症患儿42例,另设对照组45例,其中正常新生儿17例,为阴性对照组;非感染组16例,其中吸入性肺炎3例,颅内出血4例,高胆红素血症4例,新生儿窒息5例;局部感染组12例,均为肺部感染.检测4组患儿外周血中性粒细胞CD64、C反应蛋白、白细胞及降钙素原的表达水平.结果 败血症组外周血中性粒细胞CD64表达为89.23±19.45(平均荧光强度),显著高于局部感染组和阴性对照组(P＜0.01);败血症组恢复期CD64表达水平下降,但仍高于对照组.CD64取临界值为40.96平均荧光强度,诊断败血症的敏感度为94.6％,特异度为86.7％.结论 CD64测定有助于早期诊断新生儿败血症,判断病情、评价疗效和估计预后.     

中性粒细胞CD64在新生儿败血症诊断中的价值

目的探讨外周血中性粒细胞CD64表达水平在新生儿败血症早期诊断中的价值。方法败血症患儿36例,根据病史、临床表现、实验室检查确定诊断;另设对照组26例。应用流式细胞仪检测两组外周血中性粒细胞CD64表达水平。结果败血症组外周血中性粒细胞CD64表达为(60.37±22.70)[平均荧光强度(MFI)],显著高于对照组(23.14±5.10)MFI(P<0.001);败血症组恢复期CD64表达水平下降,但仍高于对照组。中性粒细胞CD64对新生儿败血症诊断的敏感性为95.7%,特异性95.8%,阳性预测值95.6%,阴性预测值为95.4%。结论外周血中性粒细胞CD64测定有助于早期诊断新生儿败血症,判断病情、评价疗效和估计预后。     

败血症新生儿外周血中性粒细胞CD64表达的意义

目的检测败血症新生儿外周血中性粒细胞表面CD64（Fcγ-RⅠ）表达水平,探讨CD64对新生儿败血症的诊断价值。方法将60例败血症新生儿和20例无感染症状的新生儿进行外周血中性粒细胞CD64及血清CRP检测。根据血培养结果分为血培养阳性组（24例）、血培养阴性组（36例）。结果血培养阳性组CD64为（6681.95&#177;2074.89）分子数/细胞,血培养阴性组为（3306.89&#177;962.43）分子数/细胞,非感染组为（2065.45&#177;841.68）分子数/细胞,血培养阳性组CD64水平显著高于血培养阴性组和非感染组,3组比较有极显著性差异（P〈0.001）。当CD64取临界值为5141分子数/细胞,其诊断新生儿败血症的敏感度为92%,特异度为97%。血培养阳性组CRP为（34.06&#177;19.60）mg/L,血培养阴性组为（13.24&#177;7.95）mg/L,非感染组为（7.44&#177;2.62）mg/L,血培养阳性组CRP水平显著高于血培养阴性组和非感染组,3组比较有极显著性差异（P〈0.001）。当CRP取临界值为17.1 mg/L时,其诊断新生儿败血症的敏感度为88%,特异度为81%。结论败血症新生儿外周血中性粒细胞表面CD64表达及血清CRP水平均显著增加,可作为早期诊断新生儿败血症的实验室指标,且中性粒细胞表面CD64表达较血清CRP有更高的敏感度和特异度。     

新生儿败血症外周血中性粒细胞CD64的表达及其意义

目的探讨外周血中性粒细胞CD64表达在新生儿败血症早期诊断中的价值.方法89例疑似败血症患儿,通过临床表现、血培养及5项非特异性指标白细胞、血小板、血浆C反应蛋白、微量血沉和未成熟中性粒细胞与中性粒细胞总数比值,分为败血症组39例和非败血症感染组50例.另设对照组19例.采用流式细胞仪检测外周血中性粒细胞CD64表达.结果败血症组患儿外周血中性粒细胞CD64表达率为(75.6±8.9)% ,显著高于非败血症感染组(29.1±6.2)%和对照组(5.1±1.1)%(P均<0.05) ,非败血症感染组与对照组比较差异也有统计学意义(P<0.05);革兰阴性菌败血症患儿CD64表达率(79.5 ±3.5)%高于革兰阳性菌败血症(76.4±4.6)%,但二者差异无统计学意义(P>0.05) ;败血症组经抗感染治疗后CD64表达水平下降.中性粒细胞CD64对新生儿败血症诊断的敏感性97.4%,特异性84.0%,阳性预测值82.6%,阴性预测值分别为97.6%.CD64检测阳性率62.9%(56/89)高于血培养19.1%(17/89)和5项非特异性指标29.2%(26/89)(P均<0.05).结论外周血中性粒细胞CD64测定可作为新生儿败血症早期诊断的指标,并可以判断疗效.     

中性粒细胞CD64在儿童社区获得性肺炎诊断中的价值

目的：探讨外周血中性粒细胞CD64的表达在儿童社区获得性肺炎（CAP）诊断中的价值。方法：依据病原体不同将98例社区获得性肺炎患儿分为细菌感染组（48例）、病毒感染组（29例）以及支原体感染组（21例）;另设健康对照组（20例）。细菌感染组依据患儿的入院情况分为轻症感染组（36例）和重症感染组（12例）。采用流式细胞术检测外周血中性粒细胞CD64的表达,同时免疫比浊法检测外周血C反应蛋白（CRP）的水平。结果：治疗前细菌感染组CD64指数和CRP水平显著高于其他3组,差异有统计学意义（P<0.05）。重症组CD64指数和CRP水平较轻症组显著增高,差异有统计学意义（P<0.05）。细菌感染组经过有效的抗菌治疗后,CD64表达水平下降,和治疗前相比差异有统计学意义（P<0.05）。相关分析结果显示CD64指数与CRP呈正相关（r=0.545,P＜0.01）。 ROC曲线分析结果显示CD64、CRP最佳临界值分别为2.8和8 mg/L,CD64指数的特异性（90%）远高于CRP（74%）。结论：外周血中性粒细胞CD64测定有助于肺部细菌感染的早期诊断,并可以判断病情的严重程度及疗效。     

CD64在新生儿感染诊断中的价值

目的探讨中性粒细胞表面标志物CD64在新生儿感染诊断中的价值。方法将2004年10月~2005年7月新生儿科(包括NICU住院)患儿96例,分重症感染组39例、一般感染组30例和非感染组27例3组进行CD64水平测定,并与C反应蛋白(CRP)及白介素-6(IL-6)进行比较。结果重症感染组CD64为(6156.21±3643.32)分子数/细胞,一般感染组为(3618.24±1397.14)分子数/细胞,非感染组为(2176.19±946.32)分子数/细胞,重症感染组CD64水平明显高于其他两组,3组间CD64值差异有极显著意义(P<0.001)。CD64诊断感染的最佳临界值为2587分子数/细胞,其敏感度为87.19%,特异度为71.55%;对所有感染的诊断敏感度为68.84%,特异度为88.48%。结论细菌感染时CD64水平明显升高,全身性细菌感染时升高尤为明显,与CRP、IL-6相比诊断优越性更明显,特别对新生儿重症感染如败血症等诊断更有价值,可以作为早期诊断新生儿感染的实验室依据。     

降钙素原及C-反应蛋白联合检测在新生儿院内感染早期诊断中的意义

目的：新生儿败血症的早期缺乏特异的临床表现,极易误诊和漏诊,本文通过对新生儿血清降钙素原(procaicltonin,PCT)和C-反应蛋白(C-reactive protein,CRP)水平进行动态监测,阐明联合应用PCT及CRP检测在新生儿院内感染早期诊断中的临床价值。方法采用回顾性分析方法,选取2013年6月至2014年8月中国医科大学附属盛京医院第一新生儿科收治的患儿111例,其中确诊败血症组37例,临床败血症组42例,对照组32例(同期住院的非感染患儿)。败血症组在感染发生时(抗生素治疗前),感染发生(抗生素治疗后)12h、24h,感染控制后3d、7d,对照组在入院后应用抗生素前分别采集血清,采用酶联荧光分析法定量测定PCT、免疫比浊法测定CRP水平。结果与对照组比较, PCT、CRP含量在确诊败血症组和临床败血症组于抗生素治疗前均明显增高(P﹤0.01)。在确诊败血症组和临床败血症组,PCT 于感染发生后12h 达峰值[分别为(15.00±15.51)ng/ml 和(17.93±13.44)ng/ml],感染控制后3d降至正常[分别为(0.49±0.47)ng/ml和(0.42±0.34)ng/ml],CRP于感染发生24h后达峰值[分别为(37.53±30.29)mg/L和(32.41±29.33)mg/L],7d后降至正常[分别为(5.72±2.98)mg/L和(5.06±3.07)mg/L]。当PCT﹥2ng/ml、CRP﹥10mg/L时准确性最好(约登指数分别为76.11%,59.45%),其敏感性分别为88.61%,75.70%;特异性分别为87.5%,83.75%;阳性预测值分别为94.59%,95.65%;阴性预测值分别为75.68%,46.15%。联合检测PCT与CRP时,各诊断效率指标均明显改善。二者受试者工作特征曲线下面积分别为0.964,0.887。结论在感染早期时,CRP和PCT均升高,当CRP﹥10mg/L,PCT﹥2ng/ml时诊断准确性好。但前者在感染后24h达峰值,7d降至正常,而后者在感染后12h达峰值,感染控制后3d恢复正常,联合检测PCT及CRP可提高检测的敏感度、特异度,准确性最佳。     

CD15s is a potential biomarker of serious bacterial infection in infants admitted to hospital

Early recognition of serious bacterial infection (SBI) in children is essential for better treatment outcome. Flow cytometry analysis of neutrophil surface molecules has been more frequently utilized as a tool for diagnosis of infection. The infants (n?=?105) under 6 months of age presenting to the pediatric emergency department with fever without apparent source who were hospitalized with suspicion of having SBI were enrolled in this prospective study. Sixty-nine infants were included into the training pool and were classified into bacterial or viral infection group. Validation pool consisted of 36 infants. The values of white blood cells counts, absolute neutrophil count (ANC), C-reactive protein (CRP), procalcitonin (PCT), neutrophil CD11b, CD15s and CD64 expression, and the percentage (%CD15s+) and absolute count (AC-CD15s+) of CD15s+ neutrophils were determined. In infants with SBI, %CD15s+ was 10.5 times more likely to be higher than the cut-off value. ANC, CRP, PCT, CD64, and AC-CD15s+ were also found as useful biomarkers for differentiation between bacterial and viral infection. The best fit multivariate logistic regression model included CRP, PCT, and %CD15s+ as strong predictors of SBI. The model's sensitivity (87 %) and specificity (83 %) indicated high model's accuracy. After validation on independent dataset, model's accuracy maintained high: 86 % sensitivity and 93 % specificity, confirming its reliability and supporting CRP, PCT, and %CD15s+ as real predictors. The findings of this study support assumption made in the literature on significance of CD15s in inflammation processes. Also, this study demonstrated for the first time that CD15s is potentially valuable biomarker of SBI in infants.     

外周血中性粒细胞CD64表达在儿童社区获得性肺炎早期病原学鉴别诊断中的应用价值

目的 评价外周血中性粒细胞CD64表达在儿童社区获得性肺炎早期病原学鉴别诊断中的应用价值.方法 选取2014年6月至2015年6月就诊我院儿科的99例患儿,依据感染的病原体不同分为3组,细菌性肺炎组(41例)、非细菌性肺炎组(38例)及正常对照组(20例);非细菌性肺炎组又分为病毒性肺炎组(22例)和肺炎支原体肺炎组(16例).采用流式细胞术检测外周血中性粒细胞CD64的平均荧光强度(median fluorescence intensity,MFI),同时检测外周血C-反应蛋白(C-reactive protein,CRP)、WBC计数及中性粒细胞比例的水平.结果 细菌性肺炎组患儿中性粒细胞CD64表达水平、CRP值及WBC计数均较非细菌性肺炎组及正常对照组高,差异均有统计学意义(P均＜0.01);以ROC曲线确定CD64的最佳截断值为6 519 MFI,其诊断细菌性肺炎的敏感性及特异性分别为87.8％、89.7％;细菌性肺炎组CD64表达水平较病毒性肺炎组、肺炎支原体肺炎组及正常对照组明显增高,差异均有统计学意义(P均＜0.01).结论 儿童社区获得性肺炎细菌感染患儿,外周血中性粒细胞表面标志物CD64表达水平显著升高,可以作为小儿细菌性肺炎的早期诊断依据,用于指导临床是否使用抗生素的依据.     

Evaluation of C reactive protein and others immunologic markers in the diagnosis of neonatal sepsis

Neonatal sepsis occurs from 1 to 21 newborns out of 1 000 live births with mortality rates as high as 30% up to 69%. The most important risk factors are prematurity, low birth weight, invasive medical procedure and prolonged hospitalization in neonatal intensive care units. An aimed and restrictive antibiotic therapy has an outstanding importance to reduce both morbidity-mortality rates and multiple drug-resistance. Generally, preterm newborns present nonspecific clinical signs of infection. The use of high sensitivity infection markers and a negative predictive value (near 100%) are important to distinguish infected and noninfected patients before the culture results and to verify adequacy and duration of antibiotic therapy. This article reviews the immunologic function and practical use of C reactive protein (CRP) and other markers in the diagnosis of neonatal sepsis. While CRP is a specific late infection marker, cytokines, cell surface markers and procalcitonin (PCT) are early infection markers. The use of multiple markers as CRP, PCT, IL-6, IL-8, CD64, CD11b is useful both to early (24-48 h) diagnose of neonatal sepsis, and to monitorate the antibiotic treatment while waiting for the results of cultural examinations.     

Neutrophil CD64 is a sensitive diagnostic marker for early-onset neonatal infection

This prospective study aimed to evaluate the diagnostic utilities of neutrophil CD64 expression for the identification of early-onset clinical infection and pneumonia in term infants and to define the optimal cutoff value so that it may act as a reference with which future studies can be compared. Term newborns in whom infection was suspected when they were <72 h of age were recruited into the study. C-reactive protein (CRP) and expression of CD64 on neutrophils were measured at 0 h (at the time of sepsis evaluation) and 24 h. The sensitivity, specificity, positive predictive value, and negative predictive value (NPV) of CRP, CD64, and the combination of these two markers for predicting neonatal sepsis were determined. A total of 338 infants with suspected clinical sepsis were investigated, 115 of whom were found to be clinically infected. CRP and CD64 in infected infants were both significantly elevated at 0 and 24 h compared with noninfected infants (p < 0.001). The calculated optimal cutoff value for CD64 was 6136 antibody-phycoerythrin molecules bound/cell. CD64 has a very high sensitivity (96%) and NPV (97%) at 24 h. The addition of CRP only marginally enhanced the sensitivity and NPV (97 and 98%, respectively). In conclusion, neutrophil CD64 is a very sensitive diagnostic marker for the identification of early-onset clinical infection and pneumonia in term newborns. The results strongly suggest that measurement of neutrophil CD64 may allow neonatal clinicians to discontinue antibiotic treatment at 24 h in infants who are clinically stable and whose CD64 expressions are below the optimal cutoff level.