Airborne Mold and Endotoxin Levels in New Orleans After Flooding
Author Information
Author(s): Gina M. Solomon, Mervi Hjelmroos-Koski, Miriam Rotkin-Ellman, S. Katharine Hammond
Primary Institution: Natural Resources Defense Council
Hypothesis
This study aimed to assess potential human exposure to bioaerosols in New Orleans after the flooding of the city.
Conclusion
The high concentration of mold measured indoors and outdoors in the New Orleans area is likely to be a significant respiratory hazard that should be monitored over time.
Supporting Evidence
- 46% of randomly selected homes in the New Orleans area had visible mold growth.
- The mean outdoor spore concentration in flooded areas was roughly double that in nonflooded areas.
- The highest mold concentrations were found indoors, particularly in unremediated homes.
- Endotoxin levels did not vary significantly between flooded and nonflooded areas.
Takeaway
After the floods in New Orleans, there was a lot of mold in the air, which can make people sick, especially if they breathe it in.
Methodology
Continuous airborne sampling for mold spores and endotoxin was performed outdoors in flooded and nonflooded areas, and inside homes for periods of 5–24 hours.
Potential Biases
Potential bias due to the limited number of sampling sites and the variability in environmental conditions.
Limitations
The study only provides a snapshot of conditions shortly after the flooding and may not represent long-term trends.
Participant Demographics
Sampling included various residential neighborhoods in New Orleans, with homes categorized by flooding extent and remediation level.
Statistical Information
P-Value
p<0.05
Confidence Interval
95% CI, 17,664–30,006
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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