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Occurrence and characterization of toxigenic Bacillus cereus in dairy products with an inactivation trial using D-Tryptophan and ascorbic acid in the rice pudding
Faculty
Veterinary Medicine
Year:
2023
Type of Publication:
ZU Hosted
Pages:
Authors:
Eman Abd Alhamed Abd Alfatah
Staff Zu Site
Abstract In Staff Site
Journal:
LWT - Food Science and Technology Elsevier
Volume:
Keywords :
Occurrence , characterization , toxigenic Bacillus cereus , dairy
Abstract:
Bacillus cereus is one of the foodborne pathogens that is incriminated in several outbreaks worldwide. The objectives of the current study were first to determine the prevalence of B. cereus-contaminated milk and dairy products retailed in Egypt. Secondly, the antimicrobial resistance profiling and virulence-associated genes of the recovered B. cereus isolates were assessed. Finally, natural and ecofriendly natural additives such as D-tryptophan and L-ascorbic acid were used for controlling the viability of Bacillus cereus spores. A total of 200 samples including market raw milk, Ultra-Heat Treated (UHT) milk, Kariesh cheese, soft white cheese (Damietta), and rice pudding, 50 of each were examined. The results of our study indicated that 31% of the examined dairy samples were contaminated with B. cereus. Surprisingly, 90% of the isolates showed multidrug- resistance against ampicillin, amoxicillin, oxacillin, and streptomycin. The molecular characterization revealed that 15 isolates harbored both hemolytic and nonhemolytic enterotoxin genes. Cotreatment of B. cereus spores-contaminated rice pudding with D-tryptophan at a concentration of 40 mM and L-ascorbic acid at a concentration of 3% revealed a significant reduction (P < 0.05) in the spore growth. Therefore, D-tryptophan and L-ascorbic acid are considered promising eco-friendly food preservatives with anti-B. cereus effects in the dairy industry.
Author Related Publications
Eman Abd Alhamed Abd Alfatah, "Dietary Parsley Seed Mitigates Methomyl-Induced Impaired Growth Performance, Hemato-Immune Suppression, Oxidative Stress, Hepato-Renal Damage, and Pseudomonas aeruginosa Susceptibility in Oreochromis niloticus", MDPI, 2022
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Eman Abd Alhamed Abd Alfatah, "Dietary black cumin (Nigella sativa) improved hemato-biochemical, oxidative stress, gene expression, and immunological response of Nile tilapia (Oreochromis niloticus) infected by Burkholderia cepacia", Elsevier, 2021
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Eman Abd Alhamed Abd Alfatah, "Novel In Vivo Assessment of Antimicrobial Efficacy of Ciprofloxacin Loaded Mesoporous Silica Nanoparticles against Salmonella typhimurium Infection", MDPI, 2022
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Eman Abd Alhamed Abd Alfatah, "Antibacterial and anti-biofilm activities of probiotic Lactobacillus plantarum against Listeria monocytogenes isolated from milk, chicken and pregnant women", FRONTIERS, 2023
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Department Related Publications
Ahlaam Abd Al Aziz Gharieb Ibrahim, "Association of Plasmid-Mediated Quinolone Resistance with AmpC- Beta-Lactamase Producing E. coli strains from Different Sources", Zagazig Univerisity, 2014
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Iman Ibrahim Attia Sweilem, "The presence of toxin genes of Clostridium perfringens isolated from camels and humans in Egypt. تواجد جينات السموم في المطثية الحاطمة المعزولة من الإبل والآدميين بمصر", كلية الطب البيطرى كرواتيا, 2010
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Iman Ibrahim Attia Sweilem, "Isolation of Staphylococcus aureus from milk and human with reference to its survival on surfaces. عزل المكور العنقودى الذهبى من الحليب والآدميين مع الإشارة لبقائها على الأسطح.", كلية الطب البيطرى - جامعة الزقازيق, 2013
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Lamia Mohammad Reza Mohammad Noman, "Studies on Antibiotic Resistance of Escherichia coli isolated from poultry and children", Sues Canal Vet. Med. J, accepted for publication (2013), 2013
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Lamia Mohammad Reza Mohammad Noman, "Bacteriological studies of Salmonella typhimurium isolated from cow calves and lambs", Assiut Vet. Med. J. Vol. 60 No. 140 January 2014, 2014
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