Document Detail

Biological control of mosquitoes by the larvicidal activity of Bacillus thuringiensis var. israelensis delta endotoxin.
MedLine Citation:
PMID:  2436447     Owner:  NLM     Status:  MEDLINE    
Bacillus thuringiensis var. israelensis (B.t.i.) is a promising, safe toxic agent for control of mosquitoes, but the rapid disappearance of its toxicity makes its use in practice economically unattractive. The lack of evidence for B.t.i. multiplication in water also makes the natural ecology of B.t.i. puzzling. The observation that mosquito larvae readily cannibalize carcasses of B.t.i.-killed larvae, and that the carcasses become toxic to scavenging larvae provides a possible solution to this puzzle. Several experimental techniques have been developed to study these phenomena (e.g., quantitative determination of spore numbers despite aggregation, protocols for following toxicity development, etc.). Results suggest a cycle involving larval poisoning and death due to delta-endotoxin of ca. 1,000 spores, germination, vegetative growth and sporulation (with toxin production) of B.t.i. after multiplication to several million in the carcass. Implications of these results for the ecology of B.t.i., and for practical applications in mosquito control, are discussed.
A Zaritsky; K Khawaled; Z Barak; D M Chipman; T Rabi
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Acta microbiologica Polonica     Volume:  35     ISSN:  0137-1320     ISO Abbreviation:  Acta Microbiol. Pol.     Publication Date:  1986  
Date Detail:
Created Date:  1987-05-14     Completed Date:  1987-05-14     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  7610362     Medline TA:  Acta Microbiol Pol     Country:  POLAND    
Other Details:
Languages:  eng     Pagination:  207-14     Citation Subset:  IM    
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MeSH Terms
Bacillus thuringiensis*
Bacterial Proteins*
Bacterial Toxins*
Culture Media
Hemolysin Proteins
Pest Control, Biological*
Spores, Bacterial
Reg. No./Substance:
0/Bacterial Proteins; 0/Bacterial Toxins; 0/Culture Media; 0/Endotoxins; 0/Hemolysin Proteins; 0/insecticidal crystal protein, Bacillus Thuringiensis

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

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