Bioassay of solubilized bacillus thuringiensis var. israelensis crystals by attachment to latex beads

Danny J. Schnell, Mary Ann Pfenstiel, Kenneth W. Nickerson

Research output: Contribution to journalArticle

42 Scopus citations

Abstract

Solubilized crystals of Bacillus thuringiensis var. israelensis were 7000 times less toxic to Aedes aegypti larvae than intact crystals, presumably because mosquito larvae are filter feeders and selectively concentrate particles while excluding water and soluble molecules. A procedure is described whereby soluble toxins are adsorbed to 0.8-micrometer latex beads, with retention of toxicity. The latex bead assay should make it possible to analyze the structure and mode of action of the mosquito toxin.

Original languageEnglish (US)
Pages (from-to)1193-1195
Number of pages3
JournalScience
Volume223
Issue number4641
DOIs
StatePublished - Jan 1 1984

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