The effect of selected factors on the survival of Bacillus cereus in the human gastrointestinal tract

Microbial Pathogenesis
Anna Berthold-PlutaMonika Garbowska

Abstract

Bacillus cereus is a Gram-positive bacterium widely distributed in soil and vegetation. This bacterial species can also contaminate raw or processed foods. Pathogenic B. cereus strains can cause a range of infections in humans, as well as food poisoning of an emetic (intoxication) or diarrheal type (toxico-infection). Toxico-infections are due to the action of the Hbl toxin, Nhe toxin, and cytotoxin K produced by the microorganism in the gastrointestinal tract. This occurs once the spores or vegetative B. cereus cells survive the pH barrier of the stomach and reach the small intestine where they produce toxins in sufficient amounts. This article discusses the effect of various factors on the survival of B. cereus in the gastrointestinal tract, including low pH and the presence of digestive enzymes in the stomach, bile salts in the small intestine, and indigenous microflora in the lower parts of the gastrointestinal tract. Additional aspects also reported to affect B. cereus survival and virulence in the gastrointestinal tract include the interaction of the spores and vegetative cells with enterocytes. In vitro studies revealed that both vegetative B. cereus and spores can survive in the gastrointestinal tract suggesting that th...Continue Reading

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Oct 20, 2015·Materials Science & Engineering. C, Materials for Biological Applications·Eric Reyes CervantesRogelio Rodríguez Talavera
Oct 21, 2016·Cellular Microbiology·Xiaoye LiuKui Zhu
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May 7, 2021·Microbial Biotechnology·María Luisa Antequera-GómezDiego Romero
Oct 9, 2021·Critical Reviews in Microbiology·Svetoslav Dimitrov TodorovMichael Leonidas Chikindas

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