Prospective comparison of (1,3)-beta-D-glucan detection using colorimetric and turbidimetric assays for diagnosing invasive fungal disease

被引:10
|
作者
Alanio, Alexandre [1 ,2 ,3 ]
Gits-Muselli, Maud [1 ,2 ]
Guigue, Nicolas [1 ]
Denis, Blandine [4 ]
Bergeron, Anne [5 ]
Touratier, Sophie [6 ]
Hamane, Samia [1 ]
Bretagne, Stephane [1 ,2 ,3 ]
机构
[1] Grp Hosp Lariboisiere, AP HP, Lab Parasitol Mycol, F-75010 Paris, France
[2] Univ Paris, F-75006 Paris, France
[3] Inst Pasteur, Unite Mycol Mol, CNRS UMR2000, F-75724 Paris, France
[4] Grp Hosp Lariboisiere, AP HP, Serv Malad Infect & Trop, F-75010 Paris, France
[5] Grp Hosp Lariboisiere, AP HP, Serv Pneumol, F-75010 Paris, France
[6] Grp Hosp Lariboisiere, AP HP, Fernand Widal, Pharm Cent, F-75010 Paris, France
关键词
(1 -> 3)-beta-D-glucan; colorimetric assay; turbidimetric assay; invasive fungal disease; PNEUMOCYSTIS-JIROVECII PNEUMONIA; BETA-D-GLUCAN; HEMATOLOGICAL MALIGNANCIES; CANDIDIASIS; ASPERGILLOSIS; INFECTIONS; 1,3-BETA-D-GLUCAN; PERFORMANCE; ACCURACY; LEUKEMIA;
D O I
10.1093/mmy/myab016
中图分类号
R51 [传染病];
学科分类号
100401 ;
摘要
Serum (1 -> 3)-beta-D-glucan (BDG), an pan fungal antigen, is detected in some invasive fungal diseases (IFDs). We compared two commercial kits, the Fungitell assay (FA) (colorimetric) and the Wako assay (WA) (turbidimetric) over a 4-month period to prospectively test 171 patients who mainly had hematological conditions (62%) and experienced episodes (n = 175) of suspected invasive fungal infection. Twenty-three episodes due to BDG-producing fungi were diagnosed (pneumocystosis, n = 12; invasive aspergillosis, n = 5; candidemia, n = 3; invasive fusariosis, n = 2; hepato-splenic candidiasis, n = 1). Both assays provided similar areas under the curves (AUC = 0.9). Using the optimized positivity thresholds (>= 120 pg/ml for FA and >= 4 pg/ml for WA), the sensitivity and specificity were 81.8% (CI95: 61.5-92.7), 94.8% (90.1-97.3) for FA and 81.8% (61.5-92.7), 95.4% (90.9-97.8) for WA. Negative predictive value was 97.3% (93.3-99.0) for both tests. If the manufacturer's positivity threshold (>= 11 pg/ml) was applied, the WA sensitivity decreased to 50%. Among 71 patients with bacterial infections, 21.1% were FA-positive and 5.6% were WA-positive (p < 10(-2)). The WA performed similarly as compared to the FA with an optimized cutoff value. The WA is a single sample test that is clinically relevant when a prompt therapeutic decision is required. Lay Summary Serum (1 -> 3)-beta-D-glucan testing is dominated by two kits including Fungitell colorimetric assay (FA) and the Wako turbidimetric assay (WA). We compared them prospectively and observed that they both perform similarly when selecting their optimal threshold (>= 120 pg/ml for FA and >= 4 pg/ml for WA).
引用
收藏
页码:882 / 889
页数:8
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