GM、G试验及真菌培养鉴定对肺部侵袭性真菌感染的诊断价值

摘要

目的：检测疑诊为肺部侵袭性真菌感染（IFI）患者的支气管肺泡灌洗液（BALF）和血清半乳甘露聚糖（galacto-mannan，GM）、血清（1，3）-β-D葡聚糖[（1，3）-beta-D-glucan，G test]并对BALF进行真菌培养鉴定，评估上述实验诊断方法对临床深部真菌感染的诊断效率。方法回顾性分析148例IFI疑诊患者，总结血清／BALF GM、血清G试验和真菌培养结果，分别评估其敏感性、特异性、阳性预测值、阴性预测值和联合检测对IFI的诊断价值。结果148例病例中临床诊断为IFI有48例，临床排除100例，在48例IFI患者中，血清GM阳性3例，BALF GM阳性25例，G试验阳性31例，真菌培养阳性30例。联合检测敏感性91．6％、特异性70．0％、阳性预测值59．5％、阴性预测值94．6％，联合检测大幅度提高了其诊断敏感性。结论联合检测GM、G试验和真菌培养鉴定能提高IFI诊断敏感性，对肺部IFI具有较好的诊断价值。%Objective To evaluate the diagnostic efficiency of deep fungal infection by detecting the serum galactomannan ( GM) and bronchoalveolar lavage fluid ( BALF) GM, serum G test and fungal culture of BALF in patients with suspected invasive fungal infection ( IFI) in lungs.Methods A retrospective analysis was performed of the results of serum /BALF GM test ,serum G test and BALF culture from 148 patients with suspected pulmonary IFI .The indexes involved sensitivity , specificity , positive predictive value , negative predictive value , as well as diagnostic capacity for deep fungal infection with separated or combined tests .Results Among the 148 cases, 48 cases were clinically diagnosed with IFI and the rest were excluded.Among the 48 IFI cases, 3 cases were positive in serum GM test , 25 cases were positive in BALF GM test , 31 cases were positive in G test and 30 cases were positive in fungal culture .The combined detection showed a sensitivity of 91.6%,specificity of 70.0%, positive predictive value of 59.5% and negative predictive value of 94.6%.Conclusion The combination of GM/G tests and fungal culture can significantly improve the clinical diagnostic efficiency of pulmonary IFI .