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The distribution of gram negative bacteria and endotoxin on raw cotton components.

Authors
Fischer-JJ; Morey-PR; Foarde-KK
Source
Am Ind Hyg Assoc J 1986 Jul; 47(7):421-426
NIOSHTIC No.
00163369
Abstract
Botanical and microbial analyses on 70 raw cottons from seven U.S. cotton growing regions or subregions were performed. All trash particles greater than 50 micrometers were removed manually and were identified microscopically. Endotoxins in plant components were estimated by a modified microtiter technique for the Limulus polyphemus amoebocyte lysate test. Cottons from poorer grades contained greater amounts of bract leaf, total botanical trash, and stained leaf than higher grade cottons. The average number of gram negative bacteria (GNB) in bract leaf, stem, seed, bark, stained lint and clean lint was 6.38, 5.65, 5.83, 6.14, 6.30, and 4.92 log N/gram, and the average endotoxin for these components was 3.67, 3.52, 3.29, 3.97, 4.01 and 2.97 log nanogram/gram. Bract leaf, seed, and cleaned lint from strict middling cotton contained significantly less endotoxin than poorer grades. Cotton components from the far west contained lesser amounts of endotoxin than those from other regions. There was no significant difference in botanical trash and stained lint between different regions. The authors conclude that the regional differences could not be ascribed to botanical composition and that climatic variables and harvesting time may be the cause of GNB and endotoxin variation.
Keywords
NIOSH-Author; Cotton-dust; Cotton-harvesting; Plant-substances; Toxins; Bacterial-dusts; Bacterial-cultures; Microscopic-analysis; Dust-sampling
CODEN
AIHAAP
Publication Date
19860701
Document Type
Journal Article
Fiscal Year
1986
NTIS Accession No.
NTIS Price
Issue of Publication
7
ISSN
0002-8894
Source Name
American Industrial Hygiene Association Journal
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