Modelling the number of viable vegetative cells of Bacillus cereus passing through the stomach

Journal of Applied Microbiology
L M WijnandsF M van Leusden

Abstract

Model the number of viable vegetative cells of B. cereus surviving the gastric passage after experiments in simulated gastric conditions. The inactivation of stationary and exponential phase vegetative cells of twelve different strains of Bacillus cereus, both mesophilic and psychrotrophic strains isolated from food and faeces from healthy and ill individuals, in simulated gastric conditions was determined using decimal reduction times at low pH (D(pH)). Subsequently inactivation rates were calculated. Inclusion of the inactivation rates into models describing the course of the gastric pH after the consumption of meal of solid food and the transfer of food from the stomach to the small intestine resulted in numbers of viable Bacillus cereus vegetative cells able to pass the stomach. According to the model, 3-26% of the ingested vegetative cells from Bacillus cereus may survive the gastric passage, dependent on the growth phase of the vegetative cells, the type of strains, and the age of the consumer. Vegetative cells of Bacillus cereus may be involved in the onset of diarrhoeal disease to a greater extent than expected since up to 26% of the ingested cells survive simulated gastric conditions.

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Citations

Oct 17, 2013·International Journal of Food Microbiology·Andreja RajkovicMieke Uyttendaele
Sep 19, 2014·Journal of Medical Microbiology·Ivanna S RolnyPablo F Pérez
Sep 14, 2013·International Journal of Food Microbiology·Jeff DaelmanMieke Uyttendaele
Mar 5, 2016·Annual Review of Food Science and Technology·Marjon H J Wells-BennikTjakko Abee
Oct 27, 2015·Applied and Environmental Microbiology·Varvara TsiliaTom Van de Wiele
Apr 11, 2012·Journal of Food Protection·Siele CeuppensTom Van de Wiele
Oct 21, 2016·Frontiers in Microbiology·Catherine DuportPhilippe Schmitt
Apr 28, 2017·Frontiers in Microbiology·Nadja JeßbergerErwin Märtlbauer
Sep 8, 2018·Frontiers in Microbiology·Sophia JohlerMonika Ehling-Schulz
Sep 4, 2018·Frontiers in Microbiology·Claudia Da RiolNadja Jessberger
Nov 11, 2020·Toxins·Nadja JessbergerErwin Märtlbauer
Aug 20, 2019·Food Microbiology·Nadja JessbergerErwin Märtlbauer
May 7, 2021·Microbial Biotechnology·María Luisa Antequera-GómezDiego Romero
Jun 24, 2021·Comprehensive Reviews in Food Science and Food Safety·Jelena JovanovicAndreja Rajkovic

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