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. 1984 Jan;43(1):206–212. doi: 10.1128/iai.43.1.206-212.1984

Bacterial endotoxin isolated from a water spray air humidification system as a putative agent of occupation-related lung disease.

D K Flaherty, F H Deck, J Cooper, K Bishop, P A Winzenburger, L R Smith, L Bynum, W B Witmer
PMCID: PMC263411  PMID: 6690401

Abstract

Outbreaks of hypersensitivity pneumonitis or humidifier fever were attributed to the inhalation of organic material aerosolized by a chilled-water spray humidification system. The purpose of this study was to isolate and characterize the serologically detectable antigen(s) present in extracts obtained from the humidification system. By using bicarbonate or phenol-water extractions or both, the antigen was isolated and characterized, using colorimetry, gas-liquid chromatography, reverse-phase high-performance liquid chromatography, and X-ray fluorescence. Carbohydrates, hexosamines, phosphorus, and even-numbered saturated and unsaturated fatty acids were constituents of the serologically detectable antigen. When tested in in vivo and in vitro assays, the antigen had demonstrable endotoxin activity. All subjects with biopsy-proven lung disease and a majority of subjects suspected of having lung disease had antibodies directed toward the purified endotoxin. The data strongly suggest that an aerosolized bacterial endotoxin is a putative agent inducing lung disease.

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Selected References

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