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Image #   210640A
Name:   Bacillus thuringiensis - spore forming, soil bacterium
Copyright:   Copyright 2010 Dennis Kunkel Microscopy, Inc.
Description:   Caption: Bacillus thuringiensis ? Gram-positive, spore forming, soil bacterium (prokaryote). Bacillus thuringiensis is a natural soil bacterium that produces a toxin called, Cry toxin. The bacterium itself can be used as a biological control agent or the isolated toxin can be used as a commercial insecticide. B. thuringiensis was first used in Germany in 1911 as a bacterial pathogen for flour moths in the province of Thuringia. Spraying or dusting plants with spores of this bacterium appear to be an environmentally safe way to attack such pests as the gypsy moth, the tent caterpillar, and the tobacco / tomato hornworm. B. thuringiensis is considered safe to humans. When Bacillus thuringiensis produces spores it also creates the toxic protein crystals (Cry toxin). The bacteria kill larvae when they ingest the bacterium and thus the toxin they produce. Other strains of B. thuringiensis have been developed to control specific insects, such as mosquitoes and potato beetles.
Magnification*: x4,000
Type: SEM
    *(Magnifications are based on a 35mm slide image of 24mm in the narrow dimension.)
Keywords:   210640A 10.01.10 bacteria bacterium soil bacteria soil bacterium gram positive gram positive bacteria gram positive bacterium biological control insecticide pesticide rod rod-shaped rod bacterium rod bacteria Bacillus thuringiensis Bacillus SEM Eubacteria Firmicutes bacilli Bacillales Bacillaceae gram-positive spore forming spore forming bacteria spore forming bacterium spore-forming spore-forming bacteria spore-forming bacterium rod shaped rod shaped bacteria rod shaped bacterium rod-shaped bacteria rod-shaped bacterium rods Cry toxin bacteria toxin bacteria toxins bacterial toxin bacterial toxins bacterium toxin bacterium toxins biological control agent soil microbe soil microbes soil microorganism soil microorganisms toxin bacterial pathogen bacteria pathogen bacterium pathogen commercial insecticide commercial insecticides insecticides gypsy moth tent caterpillar tobacco hornworm tomato hornworm biological insecticide biological insecticides crystal insecticidal protein crystal insecticidal proteins crystal insecticide protein crystal insecticide proteins crystalline insecticidal protein crystalline insecticidal proteins crystalline insecticide protein crystalline insecticide proteins Bt toxin Bt toxins prokaryote bacteria biological control bacterial biological control bacterium biological control insect pathogen insect pathogens prokaryotes crystal toxin crystal toxins biological pesticide biological pesticides

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