1
|
Chauhan R, Tall BD, Gopinath G, Azmi W, Goel G. Environmental risk factors associated with the survival, persistence, and thermal tolerance of Cronobacter sakazakii during the manufacture of powdered infant formula. Crit Rev Food Sci Nutr 2023; 63:12224-12239. [PMID: 35838158 DOI: 10.1080/10408398.2022.2099809] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Cronobacter sakazakii is an opportunistic foodborne pathogen of concern for foods having low water activity such as powdered infant formula (PIF). Its survival under desiccated stress can be attributed to its ability to adapt effectively to many different environmental stresses. Due to the high risk to neonates and its sporadic outbreaks in PIF, C. sakazakii received great attention among the scientific community, food industry and health care providers. There are many extrinsic and intrinsic factors that affect C. sakazakii survival in low-moisture foods. Moreover, short- or long-term pre-exposure to sub-lethal physiological stresses which are commonly encountered in food processing environments are reported to affect the thermal resistance of C. sakazakii. Additionally, acclimation to these stresses may render C. sakazakii resistance to antibiotics and other antimicrobial agents. This article reviews the factors and the strategies responsible for the survival and persistence of C. sakazakii in PIF. Particularly, studies focused on the influence of various factors on thermal resistance, antibiotic or antimicrobial resistance, virulence potential and stress-associated gene expression are reviewed.
Collapse
Affiliation(s)
- Rajni Chauhan
- Department of Biotechnology, Himachal Pradesh University, Shimla, India
| | | | - Gopal Gopinath
- Center for Food Safety and Applied Nutrition, U. S. Food and Drug Administration, Laurel, MD, USA
| | - Wamik Azmi
- Department of Biotechnology, Himachal Pradesh University, Shimla, India
| | - Gunjan Goel
- Department of Microbiology, School of Interdisciplinary and Applied Sciences, Central University of Haryana, Mahindra, India
| |
Collapse
|
2
|
Wang H, Li Y, Li Z, Ma R, Bai X, Zhan X, Luo K, Su R, Li X, Xia X, Shi C. Inhibition of Cronobacter sakazakii by Litsea cubeba Essential Oil and the Antibacterial Mechanism. Foods 2022; 11:foods11233900. [PMID: 36496708 PMCID: PMC9736361 DOI: 10.3390/foods11233900] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Revised: 11/16/2022] [Accepted: 11/17/2022] [Indexed: 12/12/2022] Open
Abstract
Litsea cubeba essential oil (LC-EO) has anti-insecticidal, antioxidant, and anticancer proper-ties; however, its antimicrobial activity toward Cronobacter sakazakii has not yet been researched extensively. The objective of this study was to investigate the antimicrobial and antibiofilm effects of LC-EO toward C. sakazakii, along with the underlying mechanisms. The minimum inhibitory concentrations of LC-EO toward eight different C. sakazakii strains ranged from 1.5 to 4.0 μL/mL, and LC-EO exposure showed a longer lag phase and lower specific growth compared to untreated bacteria. LC-EO increased reactive oxygen species production, decreased the integrity of the cell membrane, caused cell membrane depolarization, and decreased the ATP concentration in the cell, showing that LC-EO caused cellular damage associated with membrane permeability. LC-EO induced morphological changes in the cells. LC-EO inhibited C. sakazakii in reconstituted infant milk formula at 50 °C, and showed effective inactivation of C. sakazakii biofilms on stainless steel surfaces. Confocal laser scanning and attenuated total reflection-Fourier-transform infrared spectrometry indicated that the biofilms were disrupted by LC-EO. These findings suggest a potential for applying LC-EO in the prevention and control of C. sakazakii in the dairy industry as a natural antimicrobial and antibiofilm agent.
Collapse
Affiliation(s)
- Haoran Wang
- College of Food Science and Engineering, Northwest A&F University, Xianyang 712100, China
| | - Yulu Li
- College of Food Science and Engineering, Northwest A&F University, Xianyang 712100, China
| | - Zhuo Li
- College of Food Science and Engineering, Northwest A&F University, Xianyang 712100, China
| | - Run Ma
- College of Food Science and Engineering, Northwest A&F University, Xianyang 712100, China
| | - Xiangyang Bai
- College of Food Science and Engineering, Northwest A&F University, Xianyang 712100, China
| | - Xiangjun Zhan
- College of Food Science and Engineering, Northwest A&F University, Xianyang 712100, China
| | - Kunyao Luo
- College of Food Science and Engineering, Northwest A&F University, Xianyang 712100, China
| | - Ruiying Su
- College of Food Science and Engineering, Northwest A&F University, Xianyang 712100, China
| | - Xuejiao Li
- College of Food Science and Engineering, Northwest A&F University, Xianyang 712100, China
| | - Xiaodong Xia
- National Engineering Research Center of Seafood, School of Food Science and Technology, Dalian Polytechnic University, Dalian 116304, China
| | - Chao Shi
- College of Food Science and Engineering, Northwest A&F University, Xianyang 712100, China
- Correspondence: ; Tel.: +86-29-87092486; Fax: +86-29-87091391
| |
Collapse
|
3
|
Antibacterial Activity and Components of the Methanol-Phase Extract from Rhizomes of Pharmacophagous Plant Alpinia officinarum Hance. Molecules 2022; 27:molecules27134308. [PMID: 35807553 PMCID: PMC9268307 DOI: 10.3390/molecules27134308] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Revised: 06/26/2022] [Accepted: 06/28/2022] [Indexed: 12/02/2022] Open
Abstract
The rhizomes of Alpinia officinarum Hance (known as the smaller galangal) have been used as a traditional medicine for over 1000 years. Nevertheless, little research is available on the bacteriostatic activity of the herb rhizomes. In this study, we employed, for the first time, a chloroform and methanol extraction method to investigate the antibacterial activity and components of the rhizomes of A. officinarum Hance. The results showed that the growth of five species of pathogenic bacteria was significantly inhibited by the galangal methanol-phase extract (GMPE) (p < 0.05). The GMPE treatment changed the bacterial cell surface hydrophobicity, membrane fluidity and/or permeability. Comparative transcriptomic analyses revealed approximately eleven and ten significantly altered metabolic pathways in representative Gram-positive Staphylococcus aureus and Gram-negative Enterobacter sakazakii pathogens, respectively (p < 0.05), demonstrating different antibacterial action modes. The GMPE was separated further using a preparative high-performance liquid chromatography (Prep-HPLC) technique, and approximately 46 and 45 different compounds in two major component fractions (Fractions 1 and 4, respectively) were identified using ultra-HPLC combined with mass spectrometry (UHPLC-MS) techniques. o-Methoxy cinnamaldehyde (40.12%) and p-octopamine (62.64%) were the most abundant compounds in Fractions 1 and 4, respectively. The results of this study provide data for developing natural products from galangal rhizomes against common pathogenic bacteria.
Collapse
|
4
|
Yemiş GP, Yemiş O, Drover JC, Delaquis P. Antibacterial activity of a polyphenol-rich haskap (Lonicera caerulea L.) extract and tannic acid against Cronobacter spp. Food Control 2022. [DOI: 10.1016/j.foodcont.2022.109120] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
5
|
Kimminau E, Karnezos T, Berghaus R, Jones M, Baxter J, Hofacre C. Addition of medium chain fatty acid blend impacts Salmonella enteritidis infection in layer hens. J APPL POULTRY RES 2022. [DOI: 10.1016/j.japr.2021.100222] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
|
6
|
Shi C, Knøchel S. Inhibitory effects of binary combinations of microbial metabolites on the growth of tolerant Penicillium roqueforti and Mucor circinelloides. Lebensm Wiss Technol 2021. [DOI: 10.1016/j.lwt.2021.112039] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
7
|
Ma Y, Zhang Y, Chen K, Zhang L, Zhang Y, Wang X, Xia X. The role of PhoP/PhoQ two component system in regulating stress adaptation in Cronobacter sakazakii. Food Microbiol 2021; 100:103851. [PMID: 34416955 DOI: 10.1016/j.fm.2021.103851] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2020] [Revised: 05/30/2021] [Accepted: 06/03/2021] [Indexed: 01/06/2023]
Abstract
Cronobacter sakazakii is an opportunistic foodborne bacterial pathogen that shows resistance to multiple stress conditions. The PhoP/PhoQ two component system is a key regulatory mechanism of stress response and virulence in various bacteria, but its role in C. sakazakii has not been thoroughly studied. In this study, we found the PhoP/PhoQ system in C. sakazakii ATCC BAA-894 enhanced bacterial growth in conditions with low Mg2+, acid pH, and the presence of polymyxin B. Moreover, the ΔphoPQ strain significantly reduced survival following exposure to heat, high osmotic pressure, oxidative or bile salts compared with WT strain. Furthermore, the RNA-seq analysis indicated that 1029 genes were upregulated and 979 genes were downregulated in ΔphoPQ strain. The bacterial secretion system, flagella assembly, beta-Lactam resistance and two-component system pathways were significantly downregulated, while the ABC transporters and microbial metabolism in diverse environments pathways were upregulated. qRT-PCR analysis further confirmed that twelve genes associated with stress tolerance were positively regulated by the PhoP/PhoQ system. Therefore, these findings suggest that the PhoP/PhoQ system is an important regulatory mechanism for C. sakazakii to resist various environmental stress.
Collapse
Affiliation(s)
- Yan Ma
- College of Food Science and Engineering, Sino-US Joint Research Center, Northwest A&F University, Shaanxi, 712100, China
| | - Yingying Zhang
- College of Food Science and Engineering, Sino-US Joint Research Center, Northwest A&F University, Shaanxi, 712100, China
| | - Ke Chen
- College of Food Science and Engineering, Sino-US Joint Research Center, Northwest A&F University, Shaanxi, 712100, China
| | - Lingzhu Zhang
- College of Food Science and Engineering, Sino-US Joint Research Center, Northwest A&F University, Shaanxi, 712100, China
| | - Yibei Zhang
- College of Food Science and Engineering, Sino-US Joint Research Center, Northwest A&F University, Shaanxi, 712100, China
| | - Xin Wang
- College of Food Science and Engineering, Sino-US Joint Research Center, Northwest A&F University, Shaanxi, 712100, China
| | - Xiaodong Xia
- College of Food Science and Engineering, Sino-US Joint Research Center, Northwest A&F University, Shaanxi, 712100, China; School of Food Science and Technology, National Engineering Research Center of Seafood, Dalian Polytechnic University, 1 Qinggongyuan, Ganjingzi District, Dalian, Liaoning, 116034, China.
| |
Collapse
|
8
|
Yang Z, Ma X, Li Y, Xu H, Han X, Wang R, Zhao P, Li Z, Shi C. Antimicrobial Activity and Antibiofilm Potential of Coenzyme Q 0 against Salmonella Typhimurium. Foods 2021; 10:foods10061211. [PMID: 34071975 PMCID: PMC8230291 DOI: 10.3390/foods10061211] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Revised: 05/19/2021] [Accepted: 05/24/2021] [Indexed: 12/11/2022] Open
Abstract
Coenzyme Q0 (CoQ0) has anti-inflammatory and anti-tumor effects; however, the antimicrobial and antibiofilm activities of CoQ0 against Salmonella enterica serovar Typhimurium are unknown. Thus, we investigated the bacteriostatic and antibiofilm activities, along with the underlying mechanism, of CoQ0 against S. Typhimurium. The minimum inhibitory concentration (MIC) of CoQ0 against S. enterica serovars Typhimurium was 0.1–0.2 mg/mL (549–1098 µM), and CoQ0 at MIC and 2MIC decreased viable S. Typhimurium counts below detectable limits within 6 and 4 h, respectively. CoQ0 at 20MIC (4 mg/mL) reduced S. Typhimurium on raw chicken by 1.5 log CFU/cm3 within 6 h. CoQ0 effectively disrupted cell membrane integrity and induced morphological changes in the cell, resulting in hyperpolarization, decreased intracellular ATP concentrations, and cellular constituents leakage. Biofilm-associated S. Typhimurium cells were killed by CoQ0 treatment. These findings suggest that CoQ0 could be applied as a natural antibacterial substance for use against S. Typhimurium by the food industry.
Collapse
Affiliation(s)
- Zhuokai Yang
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, China; (Z.Y.); (X.M.); (X.H.); (R.W.); (P.Z.)
| | - Xiaoyu Ma
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, China; (Z.Y.); (X.M.); (X.H.); (R.W.); (P.Z.)
| | - Yan Li
- College of Innovation and Experiment, Northwest A&F University, Yangling 712100, China; (Y.L.); (H.X.); (Z.L.)
| | - Huidong Xu
- College of Innovation and Experiment, Northwest A&F University, Yangling 712100, China; (Y.L.); (H.X.); (Z.L.)
| | - Xinyi Han
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, China; (Z.Y.); (X.M.); (X.H.); (R.W.); (P.Z.)
| | - Ruixia Wang
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, China; (Z.Y.); (X.M.); (X.H.); (R.W.); (P.Z.)
| | - Pengyu Zhao
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, China; (Z.Y.); (X.M.); (X.H.); (R.W.); (P.Z.)
| | - Ziyi Li
- College of Innovation and Experiment, Northwest A&F University, Yangling 712100, China; (Y.L.); (H.X.); (Z.L.)
| | - Chao Shi
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, China; (Z.Y.); (X.M.); (X.H.); (R.W.); (P.Z.)
- Correspondence: ; Tel.: +86-29-8709-2486; Fax: +86-29-8709-1391
| |
Collapse
|
9
|
Polat Yemiş G, Delaquis P. Natural Compounds With Antibacterial Activity Against Cronobacter spp. in Powdered Infant Formula: A Review. Front Nutr 2020; 7:595964. [PMID: 33330595 PMCID: PMC7731913 DOI: 10.3389/fnut.2020.595964] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Accepted: 10/08/2020] [Indexed: 12/15/2022] Open
Abstract
Bacteria from the genus Cronobacter are opportunistic foodborne pathogens capable of causing severe infections in neonates, the elderly and immunocompromised adults. The majority of neonatal infections have been linked epidemiologically to dehydrated powdered infant formulas (PIFs), the majority of which are manufactured using processes that do not ensure commercial sterility. Unfortunately, the osmotolerance, desiccation resistance, mild thermotolerance and wide-ranging minimum, optimum and maximum growth temperatures of Cronobacter spp. are conducive to survival and/or growth during the processing, reconstitution and storage of reconstituted PIFs. Consequently, considerable research has been directed at the development of alternative strategies for the control of Cronobacter spp. in PIFs, including approaches that employ antimicrobial compounds derived from natural sources. The latter include a range of phytochemicals ranging from crude extracts or essential oils derived from various plants (e.g., thyme, cinnamon, clove, marjoram, cumin, mint, fennel), to complex polyphenolic extracts (e.g., muscadine seed, pomegranate peel, olive oil, and cocoa powder extracts), purified simple phenolic compounds (e.g., carvacrol, citral, thymol, eugenol, diacetyl, vanillin, cinnamic acid, trans-cinnamaldehyde, ferulic acid), and medium chain fatty acids (monocaprylin, caprylic acid). Antimicrobials derived from microbial sources (e.g., nisin, other antibacterial peptides, organic acids, coenzyme Q0) and animal sources (e.g., chitosan, lactoferrin, antibacterial peptides from milk) have also been shown to exhibit antibacterial activity against the species. The selection of antimicrobials for the control of Cronobacter spp. requires an understanding of activity at different temperatures, knowledge about their mode of action, and careful consideration for toxicological and nutritional effects on neonates. Consequently, the purpose of the present review is to provide a comprehensive summary of currently available data pertaining to the antibacterial effects of natural antimicrobial compounds against Cronobacter spp. with a view to provide information needed to inform the selection of compounds suitable for control of the pathogen during the manufacture or preparation of PIFs by end users.
Collapse
Affiliation(s)
- Gökçe Polat Yemiş
- Department of Food Engineering, Sakarya University, Serdivan, Turkey
| | - Pascal Delaquis
- Summerland Research and Development Research Centre, Agriculture and AgriFood Canada, Summerland, BC, Canada
| |
Collapse
|
10
|
Chauhan R, Singh N, Pal GK, Goel G. Trending biocontrol strategies against Cronobacter sakazakii: A recent updated review. Food Res Int 2020; 137:109385. [DOI: 10.1016/j.foodres.2020.109385] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2020] [Revised: 05/27/2020] [Accepted: 06/02/2020] [Indexed: 12/29/2022]
|
11
|
Zhang S, Xiong J, Lou W, Ning Z, Zhang D, Yang J. Inhibition of Cronobacter sakazakii in reconstituted infant formula using triglycerol monolaurate and its effect on the sensory properties of infant formula. Int J Food Microbiol 2020; 320:108518. [DOI: 10.1016/j.ijfoodmicro.2020.108518] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2019] [Revised: 01/05/2020] [Accepted: 01/09/2020] [Indexed: 11/24/2022]
|
12
|
Guo D, Wang S, Li J, Bai F, Yang Y, Xu Y, Liang S, Xia X, Wang X, Shi C. The antimicrobial activity of coenzyme Q 0 against planktonic and biofilm forms of Cronobacter sakazakii. Food Microbiol 2019; 86:103337. [PMID: 31703870 DOI: 10.1016/j.fm.2019.103337] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Revised: 07/31/2019] [Accepted: 09/17/2019] [Indexed: 10/26/2022]
Abstract
Coenzyme Q0 (CoQ0) has demonstrated antitumor, anti-inflammatory, and anti-angiogenic activities. Cronobacter sakazakii is an opportunistic foodborne pathogen associated with high mortality in neonates. In this study, the antimicrobial activity and possible antimicrobial mechanism of CoQ0 against C. sakazakii were investigated. Moreover, the inactivation effect of CoQ0 on C. sakazakii in biofilms was also evaluated. The minimum inhibitory concentration (MIC) of CoQ0 against C. sakazakii strains ranged from 0.1 to 0.2 mg/mL. Treatment caused cell membrane dysfunction, as evidenced by cell membrane hyperpolarization, decreased intracellular ATP concentration and cell membrane integrity, and changes in cellular morphology. CoQ0 combined with mild heat treatment (45, 50, or 55 °C) decreased the number of viable non-desiccated and desiccated C. sakazakii cells in a time- and dose-dependent manner in reconstituted infant milk. Furthermore, CoQ0 showed effective inactivation activity against C. sakazakii in biofilms on stainless steel, reducing the number of viable cells and damaging the structure of the biofilm. These findings suggest that CoQ0 has a strong inactivate effect on C. sakazakii and could be used in food production environments to effectively control C. sakazakii and reduce the number of illnesses associated with it.
Collapse
Affiliation(s)
- Du Guo
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Shuo Wang
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Jiahui Li
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Fangting Bai
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Yanpeng Yang
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Yunfeng Xu
- College of Food and Bioengineering, Henan University of Science and Technology, Luoyang, Henan, 471023, China
| | - Sen Liang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Technology and Business University, Beijing, 100048, China
| | - Xiaodong Xia
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Xin Wang
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Chao Shi
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, 712100, China.
| |
Collapse
|
13
|
|
14
|
Song W, Kim Y, Kang D. Effect of gamma irradiation on inactivation ofEscherichia coliO157:H7,SalmonellaTyphimurium andListeria monocytogeneson pistachios. Lett Appl Microbiol 2018; 68:96-102. [DOI: 10.1111/lam.13095] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Revised: 10/24/2018] [Accepted: 10/25/2018] [Indexed: 10/27/2022]
Affiliation(s)
- W.‐J. Song
- Department of Agricultural Biotechnology Center for Food and Bioconvergence Center for Food Safety and Toxicology and Research Institute for Agricultural and Life Sciences Seoul National University Seoul Korea
- Institutes of Green Bio Science & Technology Seoul National University Pyeongchang‐gun Gangwon‐do Korea
| | - Y.‐H. Kim
- Department of Agricultural Biotechnology Center for Food and Bioconvergence Center for Food Safety and Toxicology and Research Institute for Agricultural and Life Sciences Seoul National University Seoul Korea
- Institutes of Green Bio Science & Technology Seoul National University Pyeongchang‐gun Gangwon‐do Korea
| | - D.‐H. Kang
- Department of Agricultural Biotechnology Center for Food and Bioconvergence Center for Food Safety and Toxicology and Research Institute for Agricultural and Life Sciences Seoul National University Seoul Korea
- Institutes of Green Bio Science & Technology Seoul National University Pyeongchang‐gun Gangwon‐do Korea
| |
Collapse
|
15
|
|
16
|
Shi C, Jia Z, Sun Y, Chen Y, Guo D, Liu Z, Wen Q, Guo X, Ma L, Yang B, Baloch AB, Xia X. Inactivation of Nondesiccated and Desiccated Cronobacter sakazakii in Reconstituted Infant Formula by Combination of Citral and Mild Heat. J Food Prot 2017; 80:1193-1197. [PMID: 28621584 DOI: 10.4315/0362-028x.jfp-16-451] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The objective of this study was to evaluate the combined effect of citral plus mild heat on nondesiccated and desiccated Cronobacter sakazakii in reconstituted infant formula. Various concentrations of citral (0, 0.3, 0.6, and 0.9%) combined with various temperatures (25, 45, 50, and 55°C) were applied to nondesiccated and desiccated cocktails of three C. sakazakii strains (approximately 6.0 log CFU mL-1) in reconstituted infant formula, and the bacterial populations were assayed periodically. The combined treatments had marked antimicrobial effects on C. sakazakii compared with the control. Desiccated cells were more susceptible to citral than were nondesiccated cells in reconstituted infant formula. These findings suggest there is a potential application of citral in combination with mild heat to control C. sakazakii during preparation of reconstituted infant formula.
Collapse
Affiliation(s)
- Chao Shi
- 1 College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, People's Republic of China
| | - Zhenyu Jia
- 1 College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, People's Republic of China
| | - Yi Sun
- 1 College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, People's Republic of China
| | - Yifei Chen
- 1 College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, People's Republic of China
| | - Du Guo
- 1 College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, People's Republic of China
| | - Zhiyuan Liu
- 1 College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, People's Republic of China
| | - Qiwu Wen
- 1 College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, People's Republic of China
| | - Xiao Guo
- 1 College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, People's Republic of China
| | - Linlin Ma
- 2 Xi'An Yurun Agricultural Products Global Sourcing Co., Ltd., Shangyuan Road, Economic Development Zone, Xi'an, Shaanxi 710000, People's Republic of China; and
| | - Baowei Yang
- 1 College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, People's Republic of China
| | - Allah Bux Baloch
- 1 College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, People's Republic of China
| | - Xiaodong Xia
- 1 College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, People's Republic of China.,3 Sino-U.S. Joint Research Center for Food Safety, Yangling, Shaanxi, 712100 People's Republic of China
| |
Collapse
|
17
|
Comparative proteomic analysis of Cronobacter sakazakii by iTRAQ provides insights into response to desiccation. Food Res Int 2017; 100:631-639. [PMID: 28873731 DOI: 10.1016/j.foodres.2017.06.051] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2016] [Revised: 06/18/2017] [Accepted: 06/20/2017] [Indexed: 11/21/2022]
Abstract
Cronobacter sakazakii is a foodborne pathogen throughout the world and survives extremely desiccation stress. However, the molecular basis involved in desiccation resistance of C. sakazakii is still unknown. In this study, the potential desiccation resistance factors of C. sakazakii ATCC 29544 were determined using iTRAQ-based quantitative proteomic analysis. A total of 2775 proteins were identified by iTRAQ, of which 233 showed a different protein expression between control group and desiccation stress group. Among these 233 proteins identified as desiccation resistance proteins, there were 146 proteins downregulated and 87 proteins upregulated. According to the comprehensive proteome coverage analysis, C. sakazakii increased its resistance to desiccation by reducing the gene involved with unnecessary survival functions such as those used for virulence, adhesion, invasion and flagella assembly, while increasing gene expression of genes used in withstanding osmotic stress such as those genes involved in trehalose and betaine uptake. However, the mechanism involved in amino acid metabolism in an osmotic stress response, including the producing of γ-aminobutyric acid in C. sakazakii is still uncertain. This is the first report to determine the potential desiccation resistant factors of C. sakazakii at the proteomic levels.
Collapse
|
18
|
|
19
|
Shi C, Jia Z, Chen Y, Yang M, Liu X, Sun Y, Zheng Z, Zhang X, Song K, Cui L, Baloch AB, Xia X. Inactivation of Cronobacter sakazakii in reconstituted infant formula by combination of thymoquinone and mild heat. J Appl Microbiol 2016; 119:1700-6. [PMID: 26440735 DOI: 10.1111/jam.12964] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2015] [Revised: 09/26/2015] [Accepted: 09/28/2015] [Indexed: 11/26/2022]
Abstract
AIMS The objective of this study was to determine the combined effect of thymoquinone (TQ) and mild heat on Cronobacter sakazakii in reconstituted infant formula. METHODS AND RESULTS Reconstituted infant formula samples inoculated with a mixture of four C. sakazakii strains (approx. 6·5 log CFU ml(-1) ) were prepared with various concentrations of TQ (0, 5, 10, 20 and 30 mmol l(-1) ) and were heated to 45, 50 and 55°C for 0, 10, 20, 30, 60 and 120 min, and the surviving populations of C. sakazakii at each sampling time were enumerated. To elucidate the mode of action of TQ, membrane integrity and changes in cell morphology were examined by LIVE/DEAD(®) BacLight(™) bacterial viability kit and field emission scanning electron microscope respectively. TQ at 30 mmol l(-1) reduced the pathogen to undetectable level in between 60 and 120 min at 45°C, 60 min at 50°C and 10 min at 55°C respectively. CONCLUSIONS Our results demonstrated that the combined treatments significantly reduced (P < 0·05) the population of C. sakazakii, compared to the control. Cronobacter sakazakii numbers were reduced much more rapidly with higher temperatures and increased concentrations of TQ. And combined treatment inactivated pathogen partly by causing cell membrane disruption. SIGNIFICANCE AND IMPACT OF THE STUDY These findings suggested that TQ, together with mild heat, may have potential application in infant formula to control C. sakazakii before consumption and therefore is a possible way to prevent infections associated with C. sakazakii in infant formula.
Collapse
Affiliation(s)
- C Shi
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, China
| | - Z Jia
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, China
| | - Y Chen
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, China
| | - M Yang
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, China
| | - X Liu
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, China
| | - Y Sun
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, China
| | - Z Zheng
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, China
| | - X Zhang
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, China
| | - K Song
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, China
| | - L Cui
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, China
| | - A B Baloch
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, China
| | - X Xia
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, China
| |
Collapse
|
20
|
Kim NH, Rhee MS. Phytic Acid and Sodium Chloride Show Marked Synergistic Bactericidal Effects against Nonadapted and Acid-Adapted Escherichia coli O157:H7 Strains. Appl Environ Microbiol 2016; 82:1040-1049. [PMID: 26637600 PMCID: PMC4751840 DOI: 10.1128/aem.03307-15] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2015] [Accepted: 11/20/2015] [Indexed: 02/06/2023] Open
Abstract
The synergistic antimicrobial effects of phytic acid (PA), a natural extract from rice bran, plus sodium chloride against Escherichia coli O157:H7 were examined. Exposure to NaCl alone at concentrations up to 36% (wt/wt) for 5 min did not reduce bacterial populations. The bactericidal effects of PA alone were much greater than those of other organic acids (acetic, citric, lactic, and malic acids) under the same experimental conditions (P < 0.05). Combining PA and NaCl under conditions that yielded negligible effects when each was used alone led to marked synergistic effects. For example, whereas 0.4% PA or 3 or 4% NaCl alone had little or no effect on cell viability, combining the two completely inactivated both nonadapted and acid-adapted cells, reducing their numbers to unrecoverable levels (>7-log CFU/ml reduction). Flow cytometry confirmed that PA disrupted the cell membrane to a greater extent than did other organic acids, although the cells remained viable. The combination of PA and NaCl induced complete disintegration of the cell membrane. By comparison, none of the other organic acids acted synergistically with NaCl, and neither did NaCl-HCl solutions at the same pH values as the test solutions of PA plus NaCl. These results suggest that PA has great potential as an effective bacterial membrane-permeabilizing agent, and we show that the combination is a promising alternative to conventional chemical disinfectants. These findings provide new insight into the utility of natural compounds as novel antimicrobial agents and increase our understanding of the mechanisms underlying the antibacterial activity of PA.
Collapse
Affiliation(s)
- Nam Hee Kim
- Department of Biotechnology, School of Life Sciences and Biotechnology, Korea University, Seoul, South Korea
| | - Min Suk Rhee
- Department of Biotechnology, School of Life Sciences and Biotechnology, Korea University, Seoul, South Korea
| |
Collapse
|
21
|
Kim S, Rhee M. Highly enhanced bactericidal effects of medium chain fatty acids (caprylic, capric, and lauric acid) combined with edible plant essential oils (carvacrol, eugenol, β-resorcylic acid, trans -cinnamaldehyde, thymol, and vanillin) against Escherichia coli O157:H7. Food Control 2016. [DOI: 10.1016/j.foodcont.2015.08.022] [Citation(s) in RCA: 80] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
|
22
|
Moon H, Rhee MS. Synergism between carvacrol or thymol increases the antimicrobial efficacy of soy sauce with no sensory impact. Int J Food Microbiol 2015; 217:35-41. [PMID: 26490647 DOI: 10.1016/j.ijfoodmicro.2015.10.009] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2015] [Revised: 10/07/2015] [Accepted: 10/10/2015] [Indexed: 11/15/2022]
Abstract
Here, we examined the antimicrobial effects of soy sauce containing essential oils (EOs) against Escherichia coli O157:H7, Salmonella Typhimurium, and Listeria monocytogenes at 22°C and 4°C. To screen a variety of combined effects, soy sauce was mixed with six different EOs (carvacrol, thymol, eugenol, trans-cinnamaldehyde, β-resorcylic acid, and vanillin), each at a concentration of 1mM for 10 min. None of the oils showed bactericidal activity when used alone. Soy sauce combined with carvacrol and thymol induced the greatest antibacterial activity against all tested bacteria; therefore, these oils were further tested at 0.25, 0.5, and 1mM (0.0039%, 0.0078%, and 0.0157%) for 1, 5, and 10 min at 4°C and 22°C. In addition, sensory evaluation of soy sauce containing each EO at 0.25, 0.5, 1, and 2mM was performed using the nine point hedonic test. Carvacrol or thymol (1mM) eliminated all the test bacteria (initial population, 7.0-7.5logCFU/ml) in 1-5 min at 22°C and within 10 min at 4°C. L. monocytogenes was slightly more tolerant at 4°C, which may be attributable to the ability of the cell membrane to adapt to low temperatures. The sensory scores for soy sauce containing EOs were not significantly different from that of soy sauce without EOs (P>0.05). The stability of EO efficacy in soy sauce was also verified. These results suggest that carvacrol and thymol act synergistically with other factors present in soy sauce to increase antimicrobial activity against major foodborne pathogens at both 4°C and 22°C. The synergism may be attributable to the combination of factors (mainly high salt concentration and low pH imparted by organic acids) present in soy sauce and the membrane attacking properties of carvacrol and thymol. This method will facilitate the production of microbiologically safe soy sauce, soy sauce-based marinades, and various marinated foods.
Collapse
Affiliation(s)
- Hyeree Moon
- Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul 02841, Republic of Korea
| | - Min Suk Rhee
- Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul 02841, Republic of Korea.
| |
Collapse
|
23
|
Ruiz-Rico M, Fuentes C, Pérez-Esteve É, Jiménez-Belenguer AI, Quiles A, Marcos MD, Martínez-Máñez R, Barat JM. Bactericidal activity of caprylic acid entrapped in mesoporous silica nanoparticles. Food Control 2015. [DOI: 10.1016/j.foodcont.2015.03.016] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
|
24
|
Cálix-Lara TF, Kirsch KR, Hardin MD, Castillo A, Smith SB, Taylor TM. Investigation into Formation of Lipid Hydroperoxides from Membrane Lipids in Escherichia coli O157:H7 following Exposure to Hot Water. J Food Prot 2015; 78:1197-202. [PMID: 26038913 DOI: 10.4315/0362-028x.jfp-14-394] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Although studies have shown antimicrobial treatments consisting of hot water sprays alone or paired with lactic acid rinses are effective for reducing Escherichia coli O157:H7 loads on beef carcass surfaces, the mechanisms by which these interventions inactivate bacterial pathogens are still poorly understood. It was hypothesized that E. coli O157:H7 exposure to hot water in vitro at rising temperatures for longer time periods would result in increasing deterioration of bacterial outer membrane lipids, sensitizing the pathogen to subsequent lactic acid application. Cocktails of E. coli O157:H7 strains were subjected to hot water at 25 (control) 65, 75, or 85 °C incrementally up to 60 s, after which surviving cells were enumerated by plating. Formation of lipid hydroperoxides from bacterial membranes and cytoplasmic accumulation of L-lactic acid was quantified spectrophotometrically. Inactivation of E. coli O157:H7 proceeded in a hot water exposure duration- and temperature-dependent manner, with populations being reduced to nondetectable numbers following heating of cells in 85 °C water for 30 and 60 s (P < 0.05). Lipid hydroperoxide formation was not observed to be dependent upon increasing water temperature or exposure period. The data suggest that hot water application prior to organic acid application may function to increase the sensitivity of E. coli O157:H7 cells by degrading membrane lipids.
Collapse
Affiliation(s)
- Thelma F Cálix-Lara
- Department of Nutrition and Food Science, Texas A&M University, College Station, Texas 77843-2253, USA
| | - Katie R Kirsch
- Department of Nutrition and Food Science, Texas A&M University, College Station, Texas 77843-2253, USA
| | - Margaret D Hardin
- Department of Animal Science, Texas A&M AgriLife Research, College Station, Texas 77843-2471, USA; IEH Laboratories and Consulting Group, 15300 Bothell Way N.E., Lake Forest Park, WA 98155, USA
| | - Alejandro Castillo
- Department of Animal Science, Texas A&M AgriLife Research, College Station, Texas 77843-2471, USA
| | - Stephen B Smith
- Department of Animal Science, Texas A&M AgriLife Research, College Station, Texas 77843-2471, USA
| | - Thomas M Taylor
- Department of Animal Science, Texas A&M AgriLife Research, College Station, Texas 77843-2471, USA.
| |
Collapse
|
25
|
Kim S, Rhee M. Predictive model and optimization of a combined treatment of caprylic acid and citric acid for the reduction of Escherichia coli O157:H7 using the response surface methodology. Int J Food Microbiol 2015; 197:9-14. [DOI: 10.1016/j.ijfoodmicro.2014.12.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2013] [Revised: 10/04/2014] [Accepted: 12/07/2014] [Indexed: 11/29/2022]
|
26
|
Kim SA, Rhee MS. Synergistic antimicrobial activity of caprylic acid in combination with citric acid against both Escherichia coli O157:H7 and indigenous microflora in carrot juice. Food Microbiol 2015; 49:166-72. [PMID: 25846927 DOI: 10.1016/j.fm.2015.02.009] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2013] [Revised: 02/06/2015] [Accepted: 02/09/2015] [Indexed: 10/24/2022]
Abstract
The identification of novel, effective, and non-thermal decontamination methods is imperative for the preservation of unpasteurized and fresh vegetable juices. The aim of this study was to examine the bactericidal effects of caprylic acid + citric acid against the virulent pathogen Escherichia coli O157:H7 and the endogenous microflora in unpasteurized fresh carrot juice. Carrot juice was treated with either caprylic acid, citric acid, or a combination of caprylic acid + citric acid at mild heating temperature (45 °C or 50 °C). The color of the treated carrot juice as well as microbial survival was examined over time. Combined treatment was more effective than individual treatment in terms of both color and microbial survival. Caprylic acid + citric acid treatment (each at 5.0 mM) at 50 °C for 5 min resulted in 7.46 and 3.07 log CFU/ml reductions in the E. coli O157:H7 and endogenous microflora populations, respectively. By contrast, there was no apparent reduction in either population following individual treatment. A validation assay using a low-density E. coli O157:H7 inoculum (3.31 log CFU/ml) showed that combined treatment with caprylic acid (5.0 mM) + citric acid (2.5 mM) at 50 °C for >5 min or with caprylic acid + citric acid (both at 5.0 mM) at either 45 °C or 50 °C for >5 min completely destroyed the bacteria. Combined treatment also increased the redness of the juice, which is a perceived indication of quality. Taken together, these results indicate that combined treatment with low concentrations of caprylic acid and citric acid, which are of biotic origin, can eliminate microorganisms from unpasteurized carrot juice.
Collapse
Affiliation(s)
- S A Kim
- Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul 136-713, Republic of Korea
| | - M S Rhee
- Department of Food Bioscience and Technology, College of Life-Sciences and Biotechnology, Korea University, Seoul 136-713, Republic of Korea.
| |
Collapse
|
27
|
Nonthermal Inactivation ofCronobacter sakazakiiin Infant Formula Milk: A Review. Crit Rev Food Sci Nutr 2015; 56:1620-9. [DOI: 10.1080/10408398.2013.781991] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
28
|
Miao Y, Chen C, Ma Q, Wang Y, Zhang X, Guo F, Li W, Yong B. Effects of Soaking with Natural Additives in Combinations with Vacuum or Modified Atmosphere Packaging on Microbial Populations and Shelf Life of Fresh Truffles (ChineseTuber Indicum). J Food Sci 2014; 79:M2040-7. [DOI: 10.1111/1750-3841.12651] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2014] [Accepted: 06/18/2014] [Indexed: 11/28/2022]
Affiliation(s)
- Yuzhi Miao
- College of Life Sciences; Sichuan Normal Univ; Chengdu 610101 P.R. China
| | - Cuiping Chen
- College of Resource and Environment; Sichuan Agricultural Univ; Chengdu 611130 P.R. China
| | - Qinqin Ma
- College of Life Sciences; Sichuan Normal Univ; Chengdu 610101 P.R. China
| | - Yiding Wang
- College of Life Sciences; Sichuan Normal Univ; Chengdu 610101 P.R. China
| | - Xiaoyu Zhang
- College of Life Sciences; Sichuan Normal Univ; Chengdu 610101 P.R. China
| | - Fanglan Guo
- College of Life Sciences; Sichuan Normal Univ; Chengdu 610101 P.R. China
| | - Wei Li
- College of Life Sciences; Sichuan Normal Univ; Chengdu 610101 P.R. China
| | - Bin Yong
- College of Life Sciences; Sichuan Normal Univ; Chengdu 610101 P.R. China
| |
Collapse
|
29
|
Joshi SS, Howell AB, D'Souza DH. Cronobacter sakazakii reduction by blueberry proanthocyanidins. Food Microbiol 2014; 39:127-31. [DOI: 10.1016/j.fm.2013.11.002] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2013] [Revised: 10/28/2013] [Accepted: 11/02/2013] [Indexed: 11/28/2022]
|
30
|
Choi M, Kim S, Lee N, Rhee M. New decontamination method based on caprylic acid in combination with citric acid or vanillin for eliminating Cronobacter sakazakii and Salmonella enterica serovar Typhimurium in reconstituted infant formula. Int J Food Microbiol 2013; 166:499-507. [DOI: 10.1016/j.ijfoodmicro.2013.08.016] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2013] [Revised: 08/19/2013] [Accepted: 08/20/2013] [Indexed: 10/26/2022]
|
31
|
Chaveriat L, Gosselin I, Machut C, Martin P. Synthesis, surface tension properties and antibacterial activities of amphiphilic d -galactopyranose derivatives. Eur J Med Chem 2013; 62:177-86. [DOI: 10.1016/j.ejmech.2012.12.032] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2012] [Revised: 12/11/2012] [Accepted: 12/16/2012] [Indexed: 11/26/2022]
|
32
|
Pina-Pérez MC, Benlloch-Tinoco M, Rodrigo D, Martinez A. Cronobacter sakazakii Inactivation by Microwave Processing. FOOD BIOPROCESS TECH 2013. [DOI: 10.1007/s11947-013-1063-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
33
|
Huang CH, Huang L. Differentiation of Cronobacter sakazakii and related taxa using direct sequencing, species-specific PCR, and mini-sequencing assays. Eur Food Res Technol 2012. [DOI: 10.1007/s00217-012-1884-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
34
|
Species of Cronobacter – A review of recent advances in the genus and their significance in infant formula milk. Int Dairy J 2012. [DOI: 10.1016/j.idairyj.2012.06.005] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
35
|
Huang CH, Chang MT, Huang L. Use of novel species-specific PCR primers targeted to DNA gyrase subunit B (gyrB) gene for species identification of the Cronobacter sakazakii and Cronobacter dublinensis. Mol Cell Probes 2012; 27:15-8. [PMID: 22963906 DOI: 10.1016/j.mcp.2012.08.004] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2012] [Revised: 08/07/2012] [Accepted: 08/10/2012] [Indexed: 11/18/2022]
Abstract
Cronobacter sakazakii and its phylogenetically closest species are considered to be an opportunistic pathogens associated with food-borne disease in neonates and infants. Neither phenotypic nor genotypic (16S ribosomal DNA sequence analysis) techniques can provide sufficient resolutions for accurately and rapidly identification of these species. The objective of this study was to develop species-specific PCR based on the gyrB gene sequence for direct species identification of the C. sakazakii and Cronobacter dublinensis within the C. sakazakii group. Two pair of species-specific primers were designed and used to specifically identify C. sakazakii and C. dublinensis, but none of the other C. sakazakii group strains. Our data indicate that the novel species-specific primers could be used to rapidly and accurately identify the species of C. sakazakii and C. dublinensis from C. sakazakii group by the PCR based assays.
Collapse
Affiliation(s)
- Chien-Hsun Huang
- Bioresource Collection and Research Center, Food Industry Research and Development Institute, 331 Shih-Pin Road, Hsinchu 30062, Taiwan, ROC
| | | | | |
Collapse
|
36
|
Yemiş GP, Pagotto F, Bach S, Delaquis P. Thermal Tolerance and Survival ofCronobacter sakazakiiin Powdered Infant Formula Supplemented with Vanillin, Ethyl Vanillin, and Vanillic Acid. J Food Sci 2012; 77:M523-7. [DOI: 10.1111/j.1750-3841.2012.02834.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
37
|
Yemiş GP, Pagotto F, Bach S, Delaquis P. Effect of vanillin, ethyl vanillin, and vanillic acid on the growth and heat resistance of Cronobacter species. J Food Prot 2011; 74:2062-9. [PMID: 22186046 DOI: 10.4315/0362-028x.jfp-11-230] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Preservatives could be part of an effective intervention strategy for the control of Cronobacter species in foods, but few compounds with the desired antimicrobial properties have been identified to date. We examined the antibacterial activity of vanillin, ethyl vanillin, and vanillic acid against seven Cronobacter spp. in quarter-strength tryptic soy broth with 5 g/liter yeast extract (TSBYE) adjusted to pH 5.0, 6.0, and 7.0 at 10, 21, and 37°C. All compounds exhibited pH- and temperature-dependant bacteriostatic and bactericidal activity. MICs of vanillin and ethyl vanillin consistently increased with decreasing pH and temperature, but vanillic acid had little activity at pH values of 6.0 and 7.0. The MICs for all temperatures, pH values, and bacterial strains tested were 2 mg/ml ethyl vanillin, 3 mg/ml vanillin, and >8 mg/ml vanillic acid. MBCs also were influenced by pH, although significantly higher concentrations were needed to inactivate the bacteria at 21°C than at 10 or 37°C. Survivor curves for Cronobacter sakazakii strains at the MBCs of each compound revealed that all treatments resulted in immediate loss of cell viability at 37°C. Measurements of propidium iodide uptake indicated that the cell membranes were damaged by exposure to all three compounds. The thermal resistance of C. sakazakii was examined at 58°C in TSBYE supplemented with MBCs of each compound at pH 5.0 and 6.0. D-values at pH 5.0 were reduced from 14.56 ± 0.60 min to 0.93 ± 0.01, 0.63 ± 0.01, and 0.98 ± 0.02 min for vanillin, ethyl vanillin, and vanillic acid, respectively. These results suggest that vanillin, ethyl vanillin, and vanillic acid may be useful for the control of Cronobacter spp. in food during preparation and storage.
Collapse
Affiliation(s)
- Gökçe Polat Yemiş
- Department of Food Engineering, Ankara University, Diskapi Campus, Ankara, Turkey 06110
| | | | | | | |
Collapse
|
38
|
Kim S, Oh S, Lee Y, Imm J, Hwang I, Kang D, Rhee M. Microbial contamination of food products consumed by infants and babies in Korea. Lett Appl Microbiol 2011; 53:532-8. [DOI: 10.1111/j.1472-765x.2011.03142.x] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
39
|
Kim S, Rhee M. A new cost-effective, selective and differential medium for the isolation of Cronobacter spp. J Microbiol Methods 2011; 85:149-54. [DOI: 10.1016/j.mimet.2011.02.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2010] [Revised: 02/08/2011] [Accepted: 02/14/2011] [Indexed: 11/17/2022]
|
40
|
Kim SA, Kim OY, Rhee MS. Direct application of supercritical carbon dioxide for the reduction of Cronobacter spp. (Enterobacter sakazakii) in end products of dehydrated powdered infant formula. J Dairy Sci 2010; 93:1854-60. [PMID: 20412898 DOI: 10.3168/jds.2009-2738] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2009] [Accepted: 01/13/2010] [Indexed: 11/19/2022]
Abstract
The objective of this study was to develop a viable new method for inactivation of Cronobacter spp. that could be applied directly to dehydrated powdered infant formula (PIF) using supercritical carbon dioxide (SC-CO(2)). Samples inoculated with Cronobacter spp. were subjected to SC-CO(2) treatment under various conditions (temperature: 63, 68, and 73 degrees C; pressure: 15, 20, and 25 MPa; time: 10, 20, and 30 min). The survival of Cronobacter spp. was assayed, as were any changes in the quality of the treated PIF. Inactivation of Cronobacter spp. by SC-CO(2) was enhanced as temperature and pressure conditions increased (>6.32 log(10) cfu/g). In a validation assay using low-level inoculation (3.21 log(10) cfu/g), treatment at 73 degrees C and 15 MPa for 30 min, 20 MPa for 20 and 30 min, or 25 MPa for 20 and 30 min reduced Cronobacter spp. to undetectable levels, with no recovery of cell viability. There was no significant change in water activity, pH, and color of the treated PIF. Overall, the optimum conditions for elimination of Cronobacter spp. were determined to be 73 degrees C and 20 MPa for 20 min. These parameters for effective SC-CO(2) treatment are feasibly applicable to end product of dehydrated PIF. The results of our study may contribute to the development of an efficient method for improving the microbiological safety of PIF.
Collapse
Affiliation(s)
- S A Kim
- Division of Food Bioscience and Technology, College of Life Sciences and Biotechnology, Korea University, Seoul 136-713, South Korea
| | | | | |
Collapse
|
41
|
Kim SA, Lee YM, Oh SW, Gwak HS, Hwang IG, Kang DH, Woo GJ, Rhee MS. Biofilm Formation and Low pH Viability of Cronobacter spp. (Enterobacter sakazakii) Isolated from Powdered Infant Formula and Infant Foods in Korea. Korean J Food Sci Anim Resour 2009. [DOI: 10.5851/kosfa.2009.29.6.702] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
|