Bacillus cereus

Sat, 10/05/2019 - 03:33
This study investigated the combined effects of different doses of UV‐C light at 260 nm (0–1,800 mWs/cm2) and ethanol (0–70%) on the reduction of Escherichia coli and Bacillus cereus in experimentally contaminated Gwamegi (semidried Pacific saury). After combined treatment of 4,800 mWs/cm2 of UV‐C and 70% ethanol, E. coli and B. cereus were reduced by 3.03 and 2.73 log CFU/g, respectively....
Mon, 09/30/2019 - 17:10
Bacillus cereus, a Gram-positive bacterium, is an agent of food poisoning. B. cereus is closely related to Bacillus anthracis, a deadly pathogen for humans, and Bacillus thuringenesis, an insect pathogen. Due to the growing prevalence of antibiotic resistance in bacteria, alternative antimicrobials are needed. One such alternative is peptidoglycan hydrolase enzymes, which can lyse Gram-positive...
Mon, 09/30/2019 - 17:10
For the past few decades, there has been limited progress in the development of novel antibacterials. Previously, we postulated that the gut microbiota of animals residing in polluted environments are a forthcoming supply of antibacterials. Among various species, the water monitor lizard is an interesting species that feeds on organic waste and the carcass of wild animals. Gut microbiota of the...
Wed, 09/18/2019 - 03:32
The spoVA2mob operon confers heat resistance to Bacillus spp., and the resistance correlates to the copy number of the operon. Bacillus endospores also exhibit a strong variation in resistance to pressure, but the underlying mechanisms of endospore resistance to pressure are not fully understood. We determined the effects of multiple spoVA2mob operons on high-pressure resistance in Bacillus...
Tue, 09/17/2019 - 11:00
The spoVA2mob operon confers heat resistance to Bacillus spp., and the resistance correlates to the copy number of the operon. Bacillus endospores also exhibit a strong variation in resistance to pressure, but the underlying mechanisms of endospore resistance to pressure are not fully understood. We determined the effects of multiple spoVA2mob operons on high-pressure resistance in Bacillus...
Tue, 09/17/2019 - 11:00
Bacterial consortia are among the most basic units in the biodegradation of environmental pollutants. Pollutant-degrading strains frequently encounter different types of environmental stresses and must be able to survive with other bacteria present in the polluted environments. In this study, we proposed a noncontact interaction mode between a tetrahydrofuran (THF)-degrading strain, Rhodococcus...
Sun, 09/15/2019 - 03:35
Author(s): Martin D. Webb, Gary C. Barker, Kaarin E. Goodburn, Michael W. PeckAbstractBackgroundSpores of psychrotrophic Bacillus cereus may survive the mild heat treatments given to minimally processed chilled foods. Subsequent germination and cell multiplication during refrigerated storage may lead to bacterial concentrations that are hazardous to health.Scope and ApproachThis review is...
Sun, 09/15/2019 - 03:28
Okra mucilage powder was revealed its phenolic compounds, antioxidant and antibacterial mode of action, which may be used as a novel functional ingredient. Summary Okra mucilage powder (OMP) was firstly reported its antibacterial mode of action observed by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The reconstituted OMP or okra mucilage solution (OMS) with the...
Sun, 09/15/2019 - 03:27
BACKGROUND The scarcity of irrigation water is severely affecting global crop production. In this context, biostimulants are increasingly used as alternatives means against abiotic stress conditions. In this study, phenolic compounds composition and bioactive properties of common bean (Phaseolus vulgaris L.) plants grown under water stress conditions and biostimulants application were...
Sun, 09/15/2019 - 03:27
SYJ15 is a highly pathogenic Gram-positive Bacillus sp. with top bud spore newly isolated from dying soft shell turtle. 16SrDNA sequencing showed that it is highly homologous to B. cereus, B. thuringiensis and B. anthracis. Biochemical examinations showed that it belongs to B. cereus. To further study the new pathogen, we conducted whole-genome sequencing based on single-molecular sequencing...
Sun, 09/15/2019 - 03:26
The presence of very high concentrations of organic pollutants, phenols, tannins and heavy metals mainly chromium in wastewater discharged from leather industries, tags it as one of the most polluting industries. The phenolic syntans discharged from tanning units have an adverse effect on living organisms and cause serious environmental pollution, thereby making it very imperative to remove it....
Sat, 09/14/2019 - 01:03
LWT
Publication date: December 2019Source: LWT, Volume 116Author(s): Mohammad Shakhawat Hussain, Minyeong Kwon, Eun-ji Park, Kajla Seheli, Roksana Huque, Deog-Hwan OhAbstractThis study aims to examine the disinfection kinetics of slightly acidic electrolyzed water (SAEW) with mild heat and ultrasound on Bacillus cereus biofilms on green leaf surfaces. Biofilms of two B. cereus reference strains (ATCC...
Thu, 09/05/2019 - 01:05
LWT
Publication date: December 2019Source: LWT, Volume 116Author(s): Saerom Lee, Misook KimAbstractHere, the multi-functional properties of Leuconostoc mesenteroides MKSR (MKSR), newly isolated from the Korean fermented vegetable product, kimchi, were evaluated. The survival rate of MKSR was 98% in 0.1% pepsin solution (pH 2.0) after 3 h, and 93% in 0.1% bile salt solution after 4 h. MKSR possessed...
Fri, 08/23/2019 - 20:00
Despite the importance of the B. cereus group as major foodborne pathogens that may cause diarrheal and/or emetic syndrome(s), no study in Tunisia has been conducted in order to characterize the pathogenic potent...
Thu, 08/15/2019 - 01:05
Available online 14 August 2019 Author(s): L.A.A. Menezes, M.L. Savo Sardaro, R.T.D. Duarte, R.R. Mazzon, E. Neviani, M. Gatti, J. De Dea LindnerAbstractThis study dealt with the influence of the temperature on the bacterial dynamics of two spontaneously fermented wheat sourdoughs, propagated at 21 ± 1 °C (SD1) and 30 ± 1 °C (SD2), during nine backslopping steps (BS1 to BS9). Proteobacteria was...
Wed, 08/14/2019 - 01:05
LWT
Publication date: Available online 12 August 2019Source: LWTAuthor(s): Saritha Gopal Pandit, Krishna-Prashanth Ramesh Mekala, Mohankumari H. Puttananjaiah, Mohan Appasaheb DhaleAbstractFungus producing red pigment was identified as Talaromyces purpureogenus CFRM02. Agriculture by-product, bengal gram husk (BegH) was used as substrate for fermentation. Red pigment characteristics were confirmed by...
Tue, 08/13/2019 - 08:26
This study evaluated the inactivation effect of the ultrasonic treatment combined with acidic electrolyzed water (AEW) on Bacillus cereus. Ultrasound treatment for 10 min induced 0.69 log CFU/ml reduction of B. cereus in sterile saline, while AEW treatment resulted in 1.05 log CFU/ml for the same time. Simultaneous ultrasound and AEW treatment reduced 1.98 log CFU/mL which had synergistic effect...
Mon, 08/12/2019 - 20:00
Heavy metal accumulation in mesquite trees (Prosopis laevigata) growing in aluminum, titanium, chromium and zirconium-polluted soils (Al up to 61800 mg/kg) of a semi-arid region in Mexico was investigated using wavelength dispersive X-ray fluorescence analysis. The results showed that P. laevigata trees can hyperaccumulate up to 4100 mg/kg of Al, 14000 mg/kg of Fe, 1600 mg/kg of Ti, 2500 mg/kg of...
Fri, 08/09/2019 - 17:00
Jie Jiang, Meizhen Tang, Junfeng Chen, Yuewei Yang The bacterial strain WD-2, which was capable of efficiently degrading prochloraz-manganese, was isolated from soil contaminated with prochloraz-manganese, selected through enrichment culturing and identified as Bacillus cereus. Test results indicated that the optimal temperature and pH for bacterial growth were 35–40°C and 7.0–8.0, respectively...
Mon, 08/05/2019 - 06:10
Summary Nearly 1400 Bacillus strains growing in the plant rhizosphere were sampled from different sites on the Qinghai–Tibetan Plateau. Forty‐five of the isolates, selected due to their biocontrol activity, were genome‐sequenced and their taxonomic identification revealed that they were representatives of the Bacillus subtilis species complex (20) and the Bacillus cereus group (9). Majority of...
Mon, 08/05/2019 - 01:05
Publication date: Available online 2 August 2019 Food and Chemical ToxicologyAuthor(s): Shruti Shukla, Jong Suk Lee, Vivek K. Bajpai, Imran Khan, Yun Suk Huh, Young-Kyu Han, Myunghee KimAbstractThe present study aimed to develop a consortium of nutritive fermented food products, supplemented with phytochemicals, with reduced toxicological contents. We developed new flavored Doenjang products (...
Sat, 08/03/2019 - 01:03
LWT
Publication date: Available online 2 August 2019Source: LWTAuthor(s): Ruiling Lv, Mingming Zou, Weijun Chen, Jianwei Zhou, Tian Ding, Xingqian Ye, Donghong LiuAbstractBecause of the hydrophobicity and formation of biofilm, Bacillus cereus spores are highly resistant and widespread in food industry. The outermost layer: exosporium of Bacillus cereus spore plays an important role in its surface...
Fri, 08/02/2019 - 01:03
LWT
Publication date: Available online 31 July 2019Source: LWTAuthor(s): Halil Ibrahim Kaya, Omer SimsekAbstractBacteriocins are the most important natural preservatives against pathogens, but their limited spectrum could not fully ensure food safety. In this study, bacteriocin producers showing specific-antimicrobial activity to foodborne pathogens were isolated and the success of the cocktail of...
Sat, 07/27/2019 - 01:03
Available online 26 July 2019 Author(s): Katia Rouzeau-Szynalski, Katharina Stollewerk, Ute Messelhäusser, Monika Ehling-SchulzAbstractCereulide, a potent toxin produced by Bacillus cereus, is a small, highly heat- and acid- resistant depsipeptide toxin, which confronts food industry with several challenges. Due to the ubiquitous presence of B. cereus in the environment, this opportunistic...
Wed, 07/24/2019 - 01:03
Available online 22 July 2019 Author(s): Nadja Jessberger, Markus Kranzler, Claudia Da Riol, Valerie Schwenk, Tanja Buchacher, Richard Dietrich, Monika Ehling-Schulz, Erwin MärtlbauerAbstractThe diarrheal type of food poisoning caused by enteropathogenic Bacillus cereus has been linked to various exotoxins. Best described are the non-hemolytic enterotoxin (Nhe), hemolysin BL (Hbl), and cytotoxin...
Sat, 07/20/2019 - 01:05
Publication date: November 2019 , Volume 125Author(s): Hyeon Woo Park, Won Byong YoonAbstractThe objective of this study was to develop quantitative microbial exposure assessment models for Bacillus cereus in packaged rice cakes (PRC). Probability distribution for growth of B. cereus in PRC was estimated and effects of thermal processing and acidification on extending the shelf-life of PRC were...
Tue, 07/16/2019 - 04:05
This study evaluated the antimicrobial activity (i.e., against Bacillus cereus and Staphylococcus aureus) and the antioxidant activity (i.e., ABTS, FRAP, and DPPH) of annatto seeds extract obtained by ultrasound-assisted extraction. A response surface design with three levels such as pH (2-11), solvent concentration (50-96 %), seed-to-solvent ratio (1:2–1:10), and treatment time (0-30 min) was...
Mon, 07/15/2019 - 01:05
Publication date: January 2020 , Volume 107Author(s): Irshaan Syed, Pratik Banerjee, Preetam SarkarAbstractApplication of plant-based essential oils as antimicrobial agents has received considerable attention. However, these antimicrobial compounds undergo quick depletion due to various factors such as volatile nature, low-water solubility, and interactions with lipophilic food components....
Sat, 07/13/2019 - 01:05
Publication date: Available online 11 July 2019Source: Author(s): Yoshiaki Ohkubo, Kazuhiro Komori, Kenji Uchida, Hidemasa Motoshima, Naoya KatanoAbstractBacillus cereus is a spore-forming bacterium that adversely affects the quality of high-temperature short-time (HTST) pasteurised milk. Using a membrane filtration method, we investigated B. cereus spore levels in raw milk from dairy plants in...
Mon, 07/01/2019 - 11:00
Bacterial adaptation is characterized by a lag phase during which cells do not multiply or modify their physiology to cope with the constraints of their environment. Our aim was to determine a sequence of events during the lag phase of growth at low temperature and pH for three Bacillus cereus strains. The onsets of expression of two genes, one of which is essential for stress adaptation (cshA,...
Thu, 06/27/2019 - 01:07
Publication date: Available online 26 June 2019 Innovative Food Science & Emerging TechnologiesAuthor(s): Hee-Jeong Hwang, Ji-Hyun Seo, Chanmin Jeong, Chan-Ick Cheigh, Myong-Soo ChungAbstractThe objective of this study was to measure the inactivation efficiencies of intense pulsed light (IPL) on six types of bacteria and determine how the efficiency values are related to the spectral...
Thu, 06/27/2019 - 00:00
Bacillus cereus sensu lato is one of the most harmful bacterial groups affecting the quality and safety of powdered infant formula (PIF). In this study, samples were collected from the raw materials and processing environments of PIF. A total of 84 isolates were identified as Bacillus cereus sensu stricto (B. cereus s. s.) by 16S rRNA analysis, molecular typing technology, and physiological and...
Thu, 06/20/2019 - 01:06
LWT
Publication date: Available online 10 June 2019Source: LWTAuthor(s): Sujogya Kumar Panda, Yugal Kishore Mohanta, Laxmipriya Padhi, Walter LuytenAbstractThe anti-microbial activity of crude extracts (hexane, acetone, ethanol, and aqueous) of 46 edible plants from Odisha, India, was studied using a broth microdilution assay against 8 common food-borne pathogens (Gram-positive: Bacillus cereus...
Sat, 06/15/2019 - 01:07
Available online 14 June 2019 Author(s): Qin Shu, Yongwu Niu, Wenjun Zhao, Qihe ChenAbstractThis study aimed to investigate the antibacterial activity and underlying mechanism of mannosylerythritol lipids (MELs) against vegetative cells and spores of Gram-positive Bacillus cereus. The minimum inhibitory concentration and minimum bactericidal concentration of MELs was 1.25 mg/mL and 2.50 mg/mL,...
Sun, 06/02/2019 - 01:11
Available online 1 June 2019 Author(s): Shunshan Jiao, Hangjin Zhang, Sizhuo Hu, Yanyun ZhaoAbstractThis study investigated the effect of RF heating on inactivation of Bacillus cereus spores in red pepper powder, evaluated the influence of sample initial water activity and built a corresponding inactivation model. The inactivation effect during come-up time was also considered and Log-linear...
Wed, 05/29/2019 - 09:08
Pediococcus acidilactici strain is a suitable starter for lupine protein biodegradation, lowering the molecular weight of the protein (peptides from 10 to 20 kDa) in SMF and SSF samples. Also, enhanced protein digestibility of SSF (7.7%) and SMF protein isolates (11.2%), respectively, can be obtained, compared to nonfermented samples. The biodegradation of lupine protein endows new features to...
Sun, 05/26/2019 - 01:12
Available online 24 May 2019 Author(s): Panayiota Xylia, George Botsaris, Antonios Chrysargyris, Panagiotis Skandamis, Nikos TzortzakisAbstractFresh vegetables are important components of an everyday balanced diet making ready to-eat-salads (RTE) a commodity widely consumed. However, in the past few years these products have been linked with outbreaks of salmonellosis and listeriosis; thus the...
Wed, 05/22/2019 - 12:03
Abstract Brazil is home to a wide variety of flora, including several lesser known species, such as araçá that were processed in this study using two green technologies consecutively: supercritical fluid extraction (SFE) for nonpolar fraction and pressurized liquid extraction. For polar fraction, the experiments followed a central composite design involving ethanol as solvent, with temperature...
Tue, 05/21/2019 - 01:13
LWT
Publication date: Available online 20 May 2019Source: LWTAuthor(s): Debasish Kumar Dey, Bon Gyo Koo, Chanchal Sharma, Sun Chul KangAbstractFoodborne pathogenic bacteria like, Escherichia coli O157:H7, Bacillus cereus and Salmonella typhimurium are the biggest threat to food industries. Their growth in the environment and transmission of deadly diseases has become a challenge. The present study...
Mon, 05/20/2019 - 17:00
Francesco Celandroni, Alessandra Vecchione, Alice Cara, Diletta Mazzantini, Antonella Lupetti, Emilia Ghelardi Spores of several Bacillus species have long history of consumption and safe use as probiotics and a variety of formulations containing these organisms are available in the global market. Considering the difficulties in the identification of Bacillus species and the poor microbiological...
Mon, 05/20/2019 - 00:00
Toxins, Vol. 11, Pages 281: Binding to The Target Cell Surface Is The Crucial Step in Pore Formation of Hemolysin BL from Bacillus cereus Toxins doi: 10.3390/toxins11050281 Authors: Nadja Jessberger Richard Dietrich Stefanie Schwemmer Franziska Tausch Valerie Schwenk Andrea Didier Erwin Märtlbauer A major virulence factor involved in Bacillus cereus food poisoning is the three...
Fri, 05/17/2019 - 01:12
Available online 15 May 2019 Author(s): Ziyu Huang, Yingying Lin, Fazheng Ren, Sijia Song, Huiyuan GuoAbstractBacillus cereus is a common foodborne pathogen in dairy environment, which is hard to remove for its strong biofilm forming ability. In our study, Clean-in-place (CIP) regime and benzalkonium bromide (BK) were used in combination to enhance biofilm removal effectiveness. The CIP regime (1...
Thu, 05/16/2019 - 01:08
LWT
Publication date: Available online 14 May 2019Source: LWTAuthor(s): Ana Paula M. Pereira, Henrique A. Stelari, Frédéric Carlin, Anderson S. Sant’AnaAbstractBacillus cereus and Geobacillus stearothermophilus are spore-forming bacteria of concern for the quality and safety of cocoa-based foods, because of their frequent occurrence in raw materials and the capability of spores to withstand heat...
Mon, 05/13/2019 - 01:11
Available online 11 May 2019 Author(s): Lyddia Wilson, Kanwal Mohammad Iqbal, Terrie Simmons-Ehrhardt, Massimo F. Bertino, Muhammed Raza Shah, Vamsi K. Yadavalli, Christopher J. EhrhardtAbstractGaps in our understanding of the natural ecology and survival mechanisms of pathogenic bacteria in complex microenvironments such as soil typically occur due to the difficulty in characterizing biochemical...
Sun, 05/12/2019 - 01:13
Available online 11 May 2019 Author(s): Maricarmen Iñiguez-Moreno, Melesio Gutiérrez-Lomelí, María Guadalupe Avila-NovoaAbstractPathogens and spoilage microorganisms can develop multispecies biofilms on food contact surfaces; however, few studies have been focused on evaluated mixed biofilms of these microorganisms. Therefore this study investigated the biofilm development by pathogenic (Bacillus...
Sat, 05/11/2019 - 10:03
The signaling peptide NprX orchestrates the development of B. thuringiensis during the stationary phase. In the absence of NprX, NprR inhibits sporulation by impairing the phosphorylation of Spo0F‐P; in the presence of NprX, NprR–NprX ensures the survival of the bacteria in the insect cadaver. We show that NprX is imported in the bacteria by two olipeptide permease systems: Opp, known to be...
Thu, 05/02/2019 - 11:02
Spore-forming bacteria are natural contaminants of food raw materials, and sporulation can occur in many environments from farm to fork. In order to characterize and to predict spore formation over time, we developed a model that describes both the kinetics of growth and the differentiation of vegetative cells into spores. The model is based on a classical growth model and enables description of...

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