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A new cytotoxin from Bacillus cereus that may cause necrotic enteritis.
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A cytotoxin (CytK) has been isolated from a Bacillus cereus strain that caused a severe food poisoning outbreak killing three people. A protein of 34 kDa was highly cytotoxic, and the addition of other secreted proteins gave no synergistic effect. CytK was also necrotic and haemolytic. No known B.
CytK toxin of Bacillus cereus forms pores in planar lipid bilayers and is cytotoxic to intestinal epithelia.
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CytK is a cytotoxin isolated from a strain of Bacillus cereus cultured from cases of necrotic enteritis and the amino acid sequence of the protein suggests that it may belong to the family of beta-barrel pore-forming toxins. We show here in planar lipid bilayers the toxin is able to form pores which
[Clinico-epidemiologic characteristics of group illness caused by Bac. cereus food poisoning].
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The authors describe an outbreak of food poisoning caused by Bac. cereus embracing 80% of persons who catered at the same catering establishment. The poisoning occurred in the course of 15 hours after the moment of eating a sauce stored in warm place. In the majority of cases the course of the
Bacillus cereus infection outbreak in captive psittacines.
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This study reports an uncommon epizootic outbreak of Bacillus cereus that caused the sudden death of 12 psittacines belonging to the species Anodorhynchus hyacinthinus (1 individual), Diopsittaca nobilis (1 individual), Ara severa (1 individual) and Ara ararauna (9 individuals) in a Brazilian zoo.
Genetic and functional analysis of the cytK family of genes in Bacillus cereus.
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CytK is a pore-forming toxin of Bacillus cereus that has been linked to a case of necrotic enteritis. PCR products of the expected size were generated with cytK primers in 13 of 29 strains. Six strains were PCR-positive for the related gene hly-II, which encodes haemolysin II, a protein that is 37 %
Toxin production in a rare and genetically remote cluster of strains of the Bacillus cereus group.
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BACKGROUND
Three enterotoxins are implicated in diarrhoeal food poisoning due to Bacillus cereus: Haemolysin BL (Hbl), Non-haemolytic enterotoxin (Nhe), and Cytotoxin K (CytK). Toxin gene profiling and assays for detection of toxin-producing stains have been used in attempts to evaluate the
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