Diagnosis and treatment of invasive aspergillosis
Methods for diagnosing, treating, and monitoring the treatment of invasive aspergillosis (IA) are described. The methods can include detecting the presence of one or more volatile organic compounds (VOCs) in the breath of subjects suspected of having IA.
1. A method for diagnosing a subject with invasive aspergillosis (IA), the method comprising:
obtaining a sample comprising breath of a subject;
detecting the presence in the sample of two or more volatile organic compounds (VOCs) produced by the Aspergillus species in the sample, wherein the VOCs are selected from the group consisting of α-trans-bergamotene, β-trans-bergamotene, and trans-geranylacetone; and
diagnosing a subject as having IA who has the two or more VOCs present in the sample.
2. The method of claim 1 , comprising:
(i) detecting the presence in the sample of α-trans-bergamotene, β-trans-bergamotene, and trans-geranylacetone; and
diagnosing a subject who has all three of α-trans-bergamotene, μ-trans-bergamotene, and trans-geranylacetone in the sample as having IA, wherein the sample is a sample of a subject's breath.
3. The method of claim 1 , comprising:
obtaining a sample comprising breath of a subject;
detecting the presence in the sample of two or more VOCs, wherein the VOCs are selected from the group consisting of α-trans-bergamotene, β-trans-bergamotene, and trans-geranylacetone; and
administering an antifungal treatment to a subject who has α-trans-bergamotene, β-trans-bergamotene, and trans-geranylacetone in their breath.
4. The method of claim 3 , wherein the treatment comprises administration of one or more doses of one or more antifungal compounds.
5. The method of claim 1 , wherein determining the presence of a VOC comprises assaying the sample to detect the presence the VOC.
6. The method of claim 5 , wherein assaying the sample to detect the presence the VOC comprises using a gas chromatography (GC) or spectrometry method.
7. The method of claim 6 , wherein the spectrophotometry method is mobility spectrometry (IMS) or differential mobility spectrometry (DMS).
8. The method of claim 1 , wherein the subject is a human.
9. The method of claim 5 , wherein the subject is a human.
10. The method of claim 4 , wherein the antifungal compound is an amphotericin B formulation; an azole antifungal compound; or an echinocandin antifungal compound.
11. A method comprising:
obtaining a sample comprising breath of a subject or headspace from a culture suspected of comprising Aspergillus isolated from a subject; and
detecting the presence in the sample of two or more volatile organic compounds (VOCs) produced by the Aspergillus species in the sample, wherein the two or more VOCs are selected from the group consisting of α-trans-bergamotene, β-trans-bergamotene, and trans-geranylacetone, and optionally detecting the presence in the sample of VOCs selected from the group consisting of camphene, α-pinene, β-pinene, and limonene.
12. The method of claim 11 , wherein determining the presence of a VOC comprises assaying the sample to detect the presence the VOC.
13. The method of claim 12 , wherein assaying the sample to detect the presence the VOC comprises using a gas chromatography (GC) or spectrometry method.
14. The method of claim 13 , wherein the spectrophotometry method is mobility spectrometry (IMS) or differential mobility spectrometry (DMS).