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Table 2 Diagnostic criteria and 28S-ITS2 qPCR results for invasive aspergillosis

From: Establishment and application of real-time quantitative PCR for diagnosing invasive Aspergillosis via the blood in hematological patients: targeting a specific sequence of Aspergillus 28S-ITS2

Diagnostic criteria

IA category

Total (%) (n=41)

 

Proven (%) (n=4)

Probable (%) (n=18)

Possible (%) (n=19)

 

Host factors

    

  Neutropenia

4 (100)

6 (33.3)

3 (15.8)

13 (31.7)

  T > 38°C with

    

  Prolonged neutropenia

4 (100)

11 (61.1)

6 (31.6)

21 (51.2)

  Immunosuppressant

1 (25)

9 (50)

9 (47.4)

19 (46.3)

  Previous IFI

0 (0)

4 (22.2)

3 (15.8)

7 (17.1)

  With AIDS

0 (0)

0 (0)

0 (0)

0 (0)

  GVHD

0 (0)

3 (16.7)

2 (10.5)

5 (12.2)

  Corticosteroids

3 (75)

4 (22.2)

7 (36.8)

14 (34.1)

Clinical criteria

    

  Halo sign

3 (75)

17 (94.4)

12 (63.1)

32 (78)

  Air-crescent sign

2 (50)

1 (5.6)

2 (10.5)

5 (12.2)

  Cavity

1 (25)

3 (16.7)

0 (0)

4 (9.8)

  Symptoms of LRI

3 (75)

8 (44.4)

13 (68.4)

24 (58.5)

  Permanent fever

2 (50)

7 (38.9)

13 (68.4)

22 (53.7)

Mycological criteria

    

  Positive sputum microscopy

0(0)

6 (33.3)

0 (0)

6 (14.6)

  Positive sputum culture

1 (25)

5 (27.8)

0 (0)

6 (14.6)

  G test positive

1 (25)

8 (44.4)

1 (5.3)

10 (24.4)

  No bacterial positive

0 (0)

6 (33.3)

3 (15.8)

9 (22)

Histology

    

  Biopsy specimen of the lung

4 (100)

0 (0)

0 (0)

4 (9.8)

qPCR results (copies/μL) (median, range)

123.47

43.65

16.15

28.12

 

(25.96–266.95)

(0–549.5)

(0–98.76)

(0–549.5)

  1. qPCR, real-time qualitative polymerase chain reaction; IA, invasive aspergillosis; IFI, invasive fungal infections; AIDS, acquired immune deficiency syndrome; GVHD, graft versus host disease; LRI, lower respiratory infections.