[EMERGING]Emerging
Chemical marker analysis used to detect microbial colonization in water-damaged building materials
A method study reported that 3-hydroxy fatty acid markers of gram-negative bacteria remained detectable in building materials for weeks after water damage.
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This library reports what studies found. An entry describes a study's design, its findings in its own terms, and its limits. Nothing here is a claim about what a Sage Co. home does, delivers, or prevents.
Last reviewed August 30, 2026.
What they studied
- Building material samples from water-damaged and reference buildings.
- Gas chromatography–mass spectrometry analysis of 3-hydroxy fatty acids as endotoxin markers.
- Repeat measurement over a period of weeks after wetting.
What they found
- The authors reported that the chemical markers reliably distinguished colonized from reference materials.
- Marker levels were reported to persist for at least six weeks after the water event.
- The method was reported to detect bacterial contamination that culture methods missed.
What this study does not establish
- A method-development study on a limited sample set.
- Marker persistence in material is not a measure of airborne exposure.
- No health outcomes were measured.
- This entry reports the study. It is not a statement about any building Sage Co. designs or constructs.
Source
Szponar B, Larsson L (2000). Determination of microbial colonisation in water-damaged buildings using chemical marker analysis by gas chromatography–mass spectrometry. Indoor Air 10(1):13–18.
endotoxinsampling methodsGC-MS
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