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Microbiology of the fiber and airborne dust from washed cotton.

Authors
Olenchock-SA; Millner-PD; Fischer-JJ; Perkins-HH Jr.; Jacobs-RR
Source
NIOSH 1986 Oct; :52-74
Link
NIOSHTIC No.
00203902
Abstract
Samples of unwashed and washed lints and of airborne dusts were collected when cottons washed on four washing system were carded. These samples were evaluated for different microbiological characteristics including total bacteria, gram negative bacteria, fungi, actinomycetes, and endotoxins. The findings showed that water washing of raw cottons before carding was an effective method for reducing the endotoxin content in the lint and subsequently card generated airborne dust, regardless of the source or condition of the cotton. Variations in the washing treatments affected the efficacy of endotoxin removal. Endotoxin analyses offered a simple, reproducible, and reliable method for monitoring the cleanliness of the airborne cotton dust. For all systems tested, washing substantially reduced the levels of gram negative bacteria (GNB) and endotoxin on the washed fiber. GNB counts and endotoxin were generally reduced by more than 90% from unwashed controls. The reductions in contamination were due to both the washing treatments and the high temperatures needed for drying the fiber. In general, the more rigorous the washing treatment, the greater the reduction in contamination of the fiber.
Keywords
NIOSH-Author; Cotton-dust; Textiles-industry; Dust-exposure; Airborne-dusts; Toxins; Plant-dusts; Bacterial-dusts; Dust-control; Cotton-fibers
Publication Date
19861001
Document Type
Conference/Symposia Proceedings
Editors
Wakelyn-PJ; Jacobs-RR; Kirk-IW
Fiscal Year
1987
NTIS Accession No.
NTIS Price
Source Name
Washed Cotton: Washing Techniques, Processing Characteristics, and Health Effects
State
LA
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