Document Detail


Toxicology of methyl bromide.
MedLine Citation:
PMID:  7652197     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Methyl bromide is widely used as an insecticidal fumigant in food supplies, warehouses, barges, buildings, and furniture. Its popularity as a fumigant is largely attributable to its high toxicity to many pests, the variety of settings in which it can be applied, its ability to penetrate the fumigated substances, and its rapid dissipation following application. Because of its frequent use around humans and human-related activities and its high acute toxicity, methyl bromide-related fatal accidents have occurred. The primary route for human exposure to methyl bromide is inhalation. In California, the most frequent cause of death from methyl bromide exposure in recent years has been unauthorized entry into structures under fumigation. The most frequently reported lesions included pulmonary edema, congestion, and hemorrhage. In recent years, a great deal of effort has been given to the characterization of the toxicity of methyl bromide because of its commercial value and its direct and indirect economic importance. Methyl bromide is acutely very toxic. Subchronically and chronically, the principal target site for methyl bromide appears to be the central nervous system. However, there was no evidence for carcinogenic activity of methyl bromide following the normal environmental exposure routes of inhalation or oral intake through residue on foods. Methyl bromide is clearly genotoxic in vitro and in vivo, as evidenced by the positive results from various tests. The mechanism of toxicity for methyl bromide is currently uncertain, although its alkylating property as well as the possibility of forming a reactive intermediate through metabolic transformation remain attractive hypotheses.
Authors:
R S Yang; K L Witt; C J Alden; L G Cockerham
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Publication Detail:
Type:  Journal Article; Review    
Journal Detail:
Title:  Reviews of environmental contamination and toxicology     Volume:  142     ISSN:  0179-5953     ISO Abbreviation:  Rev Environ Contam Toxicol     Publication Date:  1995  
Date Detail:
Created Date:  1995-09-26     Completed Date:  1995-09-26     Revised Date:  2005-11-16    
Medline Journal Info:
Nlm Unique ID:  8703602     Medline TA:  Rev Environ Contam Toxicol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  65-85     Citation Subset:  IM    
Affiliation:
Department of Environmental Health, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins 80523, USA.
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MeSH Terms
Descriptor/Qualifier:
Alkylation
Animals
Central Nervous System / drug effects
DNA Damage
Food Contamination
Fumigation / adverse effects*
Gene Expression / drug effects
Humans
Hydrocarbons, Brominated / adverse effects*,  chemistry,  pharmacokinetics
Lung / drug effects
Chemical
Reg. No./Substance:
0/Hydrocarbons, Brominated; 74-83-9/methyl bromide

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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