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Chapter 28 : Galactomannan and Anti- Antibody Detection for the Diagnosis of Invasive Aspergillosis

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Galactomannan and Anti- Antibody Detection for the Diagnosis of Invasive Aspergillosis, Page 1 of 2

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Abstract:

The detection of circulating fungal antigens, such as galactomannan, might help in early diagnosis of invasive aspergillosis. As with galactomannan detection in serum, treatment of patients with mold-active antifungal agents decreases the performance of galactomannan detection in bronchoalveolar lavage . In one study galactomannan could not be detected in patients with invasive aspergillosis after 3 days of therapy. In other patient groups, such as solid organ transplant recipients, the detection of anti- antibodies might be useful for the diagnosis and management of invasive aspergillosis. An alternative approach could be to combine the detection of antigen and antibody for the diagnosis of invasive aspergillosis. An autopsy-controlled, nonrandomized pilot study evaluated the feasibility of combining the detection of circulating galactomannan and high-resolution CT for the management of invasive aspergillosis. Interestingly, the costs per patient in the preemptive group and the empiric group were not significantly different, which suggests that the costs saved in withholding antifungal therapy are similar to the increased costs of diagnostic tests and procedures in the preemptive group. Based on this study there appears to be no benefit of either strategy, although further studies are required to confirm this finding. In the past decades more insight has been obtained with respect to the performance of the galactomannan enzyme immunoassay (EIA) in different clinical specimens and in expanding patient populations. New assays have become available that could be combined with galactomannan detection, and the detection of anti- antibodies might become more important in the management of high-risk patients.

Citation: Verweij P. 2009. Galactomannan and Anti- Antibody Detection for the Diagnosis of Invasive Aspergillosis, p 363-372. In Latgé J, Steinbach W (ed), and Aspergillosis. ASM Press, Washington, DC. doi: 10.1128/9781555815523.ch28
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Figures

Image of Figure 1.
Figure 1.

Distribution of galactomannan index in 3,691 serum samples from control samples from patients with hematological malignancy (Maertens et al., 2007).

Citation: Verweij P. 2009. Galactomannan and Anti- Antibody Detection for the Diagnosis of Invasive Aspergillosis, p 363-372. In Latgé J, Steinbach W (ed), and Aspergillosis. ASM Press, Washington, DC. doi: 10.1128/9781555815523.ch28
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Image of Figure 2.
Figure 2.

Levels of β-glucan and galactomannan in consecutive plasma samples obtained from a patient with proven invasive aspergillosis due to β-Glucan was detected first, 9 days before the galactomannan test became positive.

Citation: Verweij P. 2009. Galactomannan and Anti- Antibody Detection for the Diagnosis of Invasive Aspergillosis, p 363-372. In Latgé J, Steinbach W (ed), and Aspergillosis. ASM Press, Washington, DC. doi: 10.1128/9781555815523.ch28
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Tables

Generic image for table
Table 1.

Phases in the development of invasive aspergillosis and diagnostic tools that might be used in each phase

Citation: Verweij P. 2009. Galactomannan and Anti- Antibody Detection for the Diagnosis of Invasive Aspergillosis, p 363-372. In Latgé J, Steinbach W (ed), and Aspergillosis. ASM Press, Washington, DC. doi: 10.1128/9781555815523.ch28
Generic image for table
Table 2.

Comparison of empiric and preemptive treatment strategies

Citation: Verweij P. 2009. Galactomannan and Anti- Antibody Detection for the Diagnosis of Invasive Aspergillosis, p 363-372. In Latgé J, Steinbach W (ed), and Aspergillosis. ASM Press, Washington, DC. doi: 10.1128/9781555815523.ch28

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