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Synergistic effects of combined ultrasound and peroxyacetic acid treatments against Cronobacter sakazakii biofilms on fresh cucumber. Lebensm Wiss Technol 2017. [DOI: 10.1016/j.lwt.2017.05.037] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Ogrodzki P, Forsythe SJ. DNA-Sequence Based Typing of the Cronobacter Genus Using MLST, CRISPR- cas Array and Capsular Profiling. Front Microbiol 2017; 8:1875. [PMID: 29033918 PMCID: PMC5626840 DOI: 10.3389/fmicb.2017.01875] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Accepted: 09/13/2017] [Indexed: 11/13/2022] Open
Abstract
The Cronobacter genus is composed of seven species, within which a number of pathovars have been described. The most notable infections by Cronobacter spp. are of infants through the consumption of contaminated infant formula. The description of the genus has greatly improved in recent years through DNA sequencing techniques, and this has led to a robust means of identification. However some species are highly clonal and this limits the ability to discriminate between unrelated strains by some methods of genotyping. This article updates the application of three genotyping methods across the Cronobacter genus. The three genotyping methods were multilocus sequence typing (MLST), capsular profiling of the K-antigen and colanic acid (CA) biosynthesis regions, and CRISPR-cas array profiling. A total of 1654 MLST profiled and 286 whole genome sequenced strains, available by open access at the PubMLST Cronobacter database, were used this analysis. The predominance of C. sakazakii and C. malonaticus in clinical infections was confirmed. The majority of clinical strains being in the C. sakazakii clonal complexes (CC) 1 and 4, sequence types (ST) 8 and 12 and C. malonaticus ST7. The capsular profile K2:CA2, previously proposed as being strongly associated with C. sakazakii and C. malonaticus isolates from severe neonatal infections, was also found in C. turicensis, C. dublinensis and C. universalis. The majority of CRISPR-cas types across the genus was the I-E (Ecoli) type. Some strains of C. dublinensis and C. muytjensii encoded the I-F (Ypseudo) type, and others lacked the cas gene loci. The significance of the expanding profiling will be of benefit to researchers as well as governmental and industrial risk assessors.
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Affiliation(s)
- Pauline Ogrodzki
- School of Science and Technology, Nottingham Trent University, Nottingham, United Kingdom
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Gao JX, Li P, Du XJ, Han ZH, Xue R, Liang B, Wang S. A Negative Regulator of Cellulose Biosynthesis, bcsR, Affects Biofilm Formation, and Adhesion/Invasion Ability of Cronobacter sakazakii. Front Microbiol 2017; 8:1839. [PMID: 29085341 PMCID: PMC5649176 DOI: 10.3389/fmicb.2017.01839] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Accepted: 09/08/2017] [Indexed: 12/17/2022] Open
Abstract
Cronobacter sakazakii is an important foodborne pathogen that causes neonatal meningitis and sepsis, with high mortality in neonates. However, very little information is available regarding the pathogenesis of C. sakazakii at the genetic level. In our previous study, a cellulose biosynthesis-related gene (bcsR) was shown to be involved in C. sakazakii adhesion/invasion into epithelial cells. In this study, the detailed functions of this gene were investigated using a gene knockout technique. A bcsR knockout mutant (ΔbcsR) of C. sakazakii ATCC BAA-894 showed decreased adhesion/invasion (3.9-fold) in human epithelial cell line HCT-8. Biofilm formation by the mutant was reduced to 50% of that exhibited by the wild-type (WT) strain. Raman spectrometry was used to detect variations in biofilm components caused by bcsR knockout, and certain components, including carotenoids, fatty acids, and amides, were significantly reduced. However, another biofilm component, cellulose, was increased in ΔbcsR, suggesting that bcsR negatively affects cellulose biosynthesis. This result was also verified via RT-PCR, which demonstrated up-regulation of five crucial cellulose synthesis genes (bcsA, B, C, E, Q) in ΔbcsR. Furthermore, the expression of other virulence or biofilm-related genes, including flagellar assembly genes (fliA, C, D) and toxicity-related genes (ompA, ompX, hfq), was studied. The expression of fliC and ompA in the ΔbcsR mutant was found to be remarkably reduced compared with that in the wild-type and the others were also affected excepted ompX. In summary, bcsR is a negative regulator of cellulose biosynthesis but positively regulates biofilm formation and the adhesion/invasion ability of C. sakazakii.
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Affiliation(s)
- Jian-Xin Gao
- Key Laboratory of Food Nutrition and Safety, Ministry of Education, Tianjin University of Science and Technology, Tianjin, China
| | - Ping Li
- Key Laboratory of Food Nutrition and Safety, Ministry of Education, Tianjin University of Science and Technology, Tianjin, China
| | - Xin-Jun Du
- Key Laboratory of Food Nutrition and Safety, Ministry of Education, Tianjin University of Science and Technology, Tianjin, China
| | - Zhong-Hui Han
- Key Laboratory of Food Nutrition and Safety, Ministry of Education, Tianjin University of Science and Technology, Tianjin, China
| | - Rui Xue
- Key Laboratory of Food Nutrition and Safety, Ministry of Education, Tianjin University of Science and Technology, Tianjin, China
| | - Bin Liang
- Key Laboratory of Food Nutrition and Safety, Ministry of Education, Tianjin University of Science and Technology, Tianjin, China
| | - Shuo Wang
- Key Laboratory of Food Nutrition and Safety, Ministry of Education, Tianjin University of Science and Technology, Tianjin, China.,Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Technology and Business University, Beijing, China
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Dalkilic‐Kaya G, Heperkan D, Juneja VK, Heperkan HA. Thermal resistance ofCronobacter sakazakiiisolated from baby food ingredients of dairy origin in liquid medium. J FOOD PROCESS PRES 2017. [DOI: 10.1111/jfpp.13463] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Gozde Dalkilic‐Kaya
- Faculty of Chemical and Metallurgical Engineering, Department of Food EngineeringIstanbul Technical UniversityMaslak, Istanbul 34469 Turkey
| | - Dilek Heperkan
- Faculty of Chemical and Metallurgical Engineering, Department of Food EngineeringIstanbul Technical UniversityMaslak, Istanbul 34469 Turkey
| | - Vijay K. Juneja
- U.S. Department of AgricultureAgricultural Research Service, Eastern Regional Research Center, 600 East Mermaid LaneWyndmoor, Pennsylvania 19038
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Berthold-Pluta A, Garbowska M, Stefańska I, Pluta A. Microbiological quality of selected ready-to-eat leaf vegetables, sprouts and non-pasteurized fresh fruit-vegetable juices including the presence of Cronobacter spp. Food Microbiol 2017; 65:221-230. [DOI: 10.1016/j.fm.2017.03.005] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2016] [Revised: 02/19/2017] [Accepted: 03/06/2017] [Indexed: 10/20/2022]
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Investigating the biocontrol and anti-biofilm potential of a three phage cocktail against Cronobacter sakazakii in different brands of infant formula. Int J Food Microbiol 2017; 253:1-11. [DOI: 10.1016/j.ijfoodmicro.2017.04.009] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2017] [Revised: 04/13/2017] [Accepted: 04/18/2017] [Indexed: 11/15/2022]
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Zhang H, Hou P, Lv H, Chen Y, Li X, Ren Y, Wang M, Tan H, Bi Z. Surveillance and molecular typing of Cronobacter spp. in commercial powdered infant formula and follow-up formula from 2011 to 2013 in Shandong Province, China. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2017; 97:2141-2146. [PMID: 27594404 DOI: 10.1002/jsfa.8021] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2016] [Revised: 07/21/2016] [Accepted: 08/29/2016] [Indexed: 06/06/2023]
Abstract
BACKGROUND Infection with Cronobacter spp. leads to neonatal meningitis, necrotizing enterocolitis and bacteremia. Cronobacter spp. are reported to comprise an important pathogen contaminating powdered infant formula (PIF) and follow-up formula (FUF), although little is known about the contamination level of Cronobacter spp. in PIFs and FUFs in China. RESULTS In total, 1032 samples were collected between 2011 and 2013. Forty-two samples were positive, including 1.6% in PIFs and 6.5% in FUFs. The strains were susceptible to most antibiotics except for cefoxitin. Pulsed-field gel electrophoresis after XbaI digestion produced a total of 36 banding patterns. The 38 strains were found in 27 sequence types (STs), of which nine types (ST454 to ST462) had not been reported in other countries. The clinically relevant strains obtained from the 38 isolates in the present study comprised three ST3, two ST4, two ST8 and one ST1. CONCLUSION The contamination rate in the PIF and FUF has stayed at a relatively high level. The contamination rate of PIF was significantly lower than FUF. The isolates had high susceptibility to the antibiotics tested, except cefoxitin. There were polymorphisms between the Cronobacter spp. as indicated by pulsed-field gel electrophoresis and multilocus sequence typing. Therefore, contamination with Cronobacter spp. remains a current issue for commercial infant formulas in China. © 2016 Society of Chemical Industry.
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Affiliation(s)
- Huaning Zhang
- Shandong Center for Disease Control and Prevention, Jinan, China
- Academy of Preventive Medicine, Shandong University, Jinan, China
- Shandong Provincial Key Laboratory of Infectious Disease Control and Prevention, Jinan, China
| | - Peibin Hou
- Shandong Center for Disease Control and Prevention, Jinan, China
- Academy of Preventive Medicine, Shandong University, Jinan, China
- Shandong Provincial Key Laboratory of Infectious Disease Control and Prevention, Jinan, China
| | - Hui Lv
- Shandong Center for Disease Control and Prevention, Jinan, China
- Academy of Preventive Medicine, Shandong University, Jinan, China
- Shandong Provincial Key Laboratory of Infectious Disease Control and Prevention, Jinan, China
| | - Yuzhen Chen
- Shandong Center for Disease Control and Prevention, Jinan, China
- Academy of Preventive Medicine, Shandong University, Jinan, China
- Shandong Provincial Key Laboratory of Infectious Disease Control and Prevention, Jinan, China
| | - Xinpeng Li
- Shandong Center for Disease Control and Prevention, Jinan, China
- Academy of Preventive Medicine, Shandong University, Jinan, China
- Shandong Provincial Key Laboratory of Infectious Disease Control and Prevention, Jinan, China
| | - Yanyan Ren
- Shandong Center for Disease Control and Prevention, Jinan, China
- Academy of Preventive Medicine, Shandong University, Jinan, China
- Shandong Provincial Key Laboratory of Infectious Disease Control and Prevention, Jinan, China
| | - Mei Wang
- Shandong Center for Disease Control and Prevention, Jinan, China
- Academy of Preventive Medicine, Shandong University, Jinan, China
- Shandong Provincial Key Laboratory of Infectious Disease Control and Prevention, Jinan, China
| | - Hailian Tan
- Shandong Center for Disease Control and Prevention, Jinan, China
- Academy of Preventive Medicine, Shandong University, Jinan, China
- Shandong Provincial Key Laboratory of Infectious Disease Control and Prevention, Jinan, China
| | - Zhenwang Bi
- Shandong Center for Disease Control and Prevention, Jinan, China
- Academy of Preventive Medicine, Shandong University, Jinan, China
- Shandong Provincial Key Laboratory of Infectious Disease Control and Prevention, Jinan, China
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58
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Fei P, Jiang Y, Feng J, Forsythe SJ, Li R, Zhou Y, Man C. Antibiotic and Desiccation Resistance of Cronobacter sakazakii and C. malonaticus Isolates from Powdered Infant Formula and Processing Environments. Front Microbiol 2017; 8:316. [PMID: 28303125 PMCID: PMC5332417 DOI: 10.3389/fmicb.2017.00316] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2016] [Accepted: 02/15/2017] [Indexed: 11/20/2022] Open
Abstract
This study evaluated the antimicrobial and desiccation resistance of Cronobacter sakazakii and Cronobacter malonaticus isolates from powdered infant formula and processing environments. The antimicrobial susceptibility tests showed that the 70 Cronobacter strains, representing 19 sequence types, were susceptible to the most of the antibiotics except for amoxicillin-clavulanate, ampicillin, and cefazolin. Furthermore, the growth of six C. sakazakii and two C. malonaticus strains from different sequence types (STs) in hyperosmotic media was measured. The growth of the two C. sakazakii strains (CE1 and CE13) from the neonatal pathovars ST4 and ST8, were significantly higher (p < 0.05) than that of other strains. C. malonaticus strain CM35 (ST201) was the slowest grower in all strains, and most could not grow in more than 8% NaCl solution. Also the survival of these strains under desiccation conditions was followed for 1 year. The viable count of Cronobacter spp. under desiccation conditions was reduced on average by 3.02 log cycles during 1 year, with CE13 (ST8) being the most desiccation resistant strain. These results will improve our understanding of the persistence of the two closely related species C. sakazakii and C. malonaticus which are of concern for neonatal and adult health.
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Affiliation(s)
- Peng Fei
- Key Laboratory of Dairy Science, Ministry of Education, College of Food Science, Northeast Agricultural UniversityHarbin, China
| | - Yujun Jiang
- Key Laboratory of Dairy Science, Ministry of Education, College of Food Science, Northeast Agricultural UniversityHarbin, China
- National Research Center of Dairy Engineering and Technology, Northeast Agricultural UniversityHarbin, China
| | - Jing Feng
- Key Laboratory of Dairy Science, Ministry of Education, College of Food Science, Northeast Agricultural UniversityHarbin, China
| | - Stephen J. Forsythe
- Pathogen Research Group, School of Science and Technology, Nottingham Trent UniversityNottingham, UK
| | - Ran Li
- Key Laboratory of Dairy Science, Ministry of Education, College of Food Science, Northeast Agricultural UniversityHarbin, China
| | - Yanhong Zhou
- Key Laboratory of Dairy Science, Ministry of Education, College of Food Science, Northeast Agricultural UniversityHarbin, China
| | - Chaoxin Man
- Key Laboratory of Dairy Science, Ministry of Education, College of Food Science, Northeast Agricultural UniversityHarbin, China
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Hoeflinger JL, Miller MJ. Cronobacter sakazakii ATCC 29544 Autoaggregation Requires FliC Flagellation, Not Motility. Front Microbiol 2017; 8:301. [PMID: 28293226 PMCID: PMC5328975 DOI: 10.3389/fmicb.2017.00301] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2016] [Accepted: 02/14/2017] [Indexed: 01/06/2023] Open
Abstract
Cronobacter sakazakii is an opportunistic nosocomial and foodborne pathogen that causes severe infections with high morbidity and mortality rates in neonates, the elderly, and immunocompromised individuals. Little is known about the pathogenesis mechanism of this pathogen and if there are any consequences of C. sakazakii colonization in healthy individuals. In this study, we characterized the mechanisms of autoaggregation in C. sakazakii ATCC 29544 (CS29544). Autoaggregation in CS29544 occurred rapidly, within 30 min, and proceeded to a maximum of 70%. Frameshift mutations in two flagellum proteins (FlhA and FliG) were identified in two nonautoaggregating CS29544 clonal variant isolates. Strategic gene knockouts were generated to determine if structurally intact and functional flagella were required for autoaggregation in CS29544. All structural knockouts (ΔflhA, ΔfliG, and ΔfliC) abolished autoaggregation, whereas the functional knockout (ΔmotAB) did not prevent autoaggregation. Complementation with FliC (ΔfliC/cfliC) restored autoaggregation. Autoaggregation was also disrupted by the addition of exogenous wild-type CS29544 filaments in a dose-dependent manner. Finally, filament supercoils tethering neighboring wild-type CS29544 cells together were observed by transmission electron microscopy. In silico analyses suggest that direct interactions of neighboring CS29544 FliC filaments proceed by hydrophobic bonding between the externally exposed hypervariable regions of the CS29544 FliC flagellin protein. Further research is needed to confirm if flagella-mediated autoaggregation plays a prominent role in C. sakazakii pathogenesis.
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Affiliation(s)
- Jennifer L Hoeflinger
- Department of Food Science and Human Nutrition, University of Illinois at Urbana Champaign Urbana, IL, USA
| | - Michael J Miller
- Department of Food Science and Human Nutrition, University of Illinois at Urbana Champaign Urbana, IL, USA
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Ripollés D, Harouna S, Parrón JA, Arenales I, Calvo M, Pérez MD, Sánchez L. Inhibition of Cronobacter sakazakii Adhesion to Caco-2 Cells by Commercial Dairy Powders and Raw Buttermilk. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2017; 65:1043-1050. [PMID: 28092156 DOI: 10.1021/acs.jafc.6b04971] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Cronobacter sakazakii is a foodborne pathogen that has been associated with severe infections, mainly in neonates. The binding of this bacterium to host cell surfaces represents the first step in the pathogenesis of disease. An ELISA-based assay has been developed using a polyclonal antiserum against C. sakazakii to determine its adhesion to Caco-2 cells. The antiserum used recognized many of the outer membrane proteins of C. sakazakii. A positive correlation was found between the absorbance values obtained by ELISA and the number of bacteria adhered to cells determined by plate counting. The inhibitory effect on bacterial adhesion to cells observed with some dairy products was concentration-dependent. Commercial buttermilk caused the maximal reduction of the adhesion percentage (33.0 ± 5.07) at the highest concentration assayed (20 mg/mL), followed by butter serum (31.9 ± 5.36), skim milk (30.4 ± 5.07), and raw buttermilk (25.6 ± 3.80). In some cases, significant differences (p < 0.05) were found in the inhibition exerted by the different products evaluated. The results obtained in this study demonstrate that dairy products contain some components with the ability to inhibit the adhesion of C. sakazakii to Caco-2 cells.
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Affiliation(s)
- Daniel Ripollés
- Departamento de Producción Animal y Ciencia de los Alimentos, Facultad de Veterinaria, Instituto Agroalimentario de Aragón (IA2), Universidad de Zaragoza-CITA , Zaragoza, Spain
| | - Saidou Harouna
- Departamento de Producción Animal y Ciencia de los Alimentos, Facultad de Veterinaria, Instituto Agroalimentario de Aragón (IA2), Universidad de Zaragoza-CITA , Zaragoza, Spain
| | - José A Parrón
- Departamento de Producción Animal y Ciencia de los Alimentos, Facultad de Veterinaria, Instituto Agroalimentario de Aragón (IA2), Universidad de Zaragoza-CITA , Zaragoza, Spain
| | - Irene Arenales
- Departamento de Ingenierı́a Agroindustrial, Universidad Autónoma de Chapingo , Texcoco, México
| | - Miguel Calvo
- Departamento de Producción Animal y Ciencia de los Alimentos, Facultad de Veterinaria, Instituto Agroalimentario de Aragón (IA2), Universidad de Zaragoza-CITA , Zaragoza, Spain
| | - María D Pérez
- Departamento de Producción Animal y Ciencia de los Alimentos, Facultad de Veterinaria, Instituto Agroalimentario de Aragón (IA2), Universidad de Zaragoza-CITA , Zaragoza, Spain
| | - Lourdes Sánchez
- Departamento de Producción Animal y Ciencia de los Alimentos, Facultad de Veterinaria, Instituto Agroalimentario de Aragón (IA2), Universidad de Zaragoza-CITA , Zaragoza, Spain
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Pathogens of Food Animals: Sources, Characteristics, Human Risk, and Methods of Detection. ADVANCES IN FOOD AND NUTRITION RESEARCH 2017; 82:277-365. [PMID: 28427535 DOI: 10.1016/bs.afnr.2016.12.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Pathogens associated with food production (livestock) animals come in many forms causing a multitude of disease for humans. For the purpose of this review, these infectious agents can be divided into three broad categories: those that are associated with bacterial disease, those that are associated with viruses, and those that are parasitic in nature. The goal of this chapter is to provide the reader with an overview of the most common pathogens that cause disease in humans through exposure via the food chain and the consequence of this exposure as well as risk and detection methods. We have also included a collection of unusual pathogens that although rare have still caused disease, and their recognition is warranted in light of emerging and reemerging diseases. These provide the reader an understanding of where the next big outbreak could occur. The influence of the global economy, the movement of people, and food makes understanding production animal-associated disease paramount to being able to address new diseases as they arise.
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Abusheliabi A, Al-Rumaithi HO, Olaimat AN, Al-Nabulsi AA, Osaili T, Shaker R, Ayyash MM. Inhibitory effect of camel milk on Cronobacter sakazakii. J Food Saf 2017. [DOI: 10.1111/jfs.12343] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Aisha Abusheliabi
- Food Science Department, College of Food and Agriculture; United Arab Emirates University; Al Ain United Arab Emirates
| | - Hind O. Al-Rumaithi
- Food Control Division, Abu Dhabi Food Control Authority (AFDCA); Abu Dhabi United Arab Emirates
| | - Amin N. Olaimat
- Department of Clinical Nutrition and Dietetics; Hashemite University; Zarqa Jordan
| | - Anas A. Al-Nabulsi
- Department of Nutrition and Food Technology; Jordan University of Science and Technology; Irbid Jordan
| | - Tareq Osaili
- Department of Nutrition and Food Technology; Jordan University of Science and Technology; Irbid Jordan
| | - Reyad Shaker
- Department of Clinical Nutrition and Dietetics; University of Sharjah; Sharjah United Arab Emirates
| | - Mutamed M. Ayyash
- Food Science Department, College of Food and Agriculture; United Arab Emirates University; Al Ain United Arab Emirates
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63
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Heperkan D, Dalkilic-Kaya G, Juneja VK. Cronobacter sakazakii in baby foods and baby food ingredients of dairy origin and microbiological profile of positive samples. Lebensm Wiss Technol 2017. [DOI: 10.1016/j.lwt.2016.09.013] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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64
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Transcriptome analysis of Cronobacter sakazakii ATCC BAA-894 after interaction with human intestinal epithelial cell line HCT-8. Appl Microbiol Biotechnol 2016; 100:311-22. [PMID: 26481623 DOI: 10.1007/s00253-015-7053-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2015] [Revised: 09/20/2015] [Accepted: 09/30/2015] [Indexed: 10/22/2022]
Abstract
Cronobacter spp. are opportunistic pathogens that are responsible for infections including severe meningitis, septicemia, and necrotizing enterocolitis in neonates and infants. To date, questions still remain regarding the mechanisms of pathogenicity and virulence determinants for each bacterial strain. In this study, we established an in vitro model for Cronobacter sakazakii ATCC BAA-894 infection of HCT-8 human colorectal epithelial cells. The transcriptome profile of C. sakazakii ATCC BAA-894 after interaction with HCT-8 cells was determined using high-throughput whole-transcriptome sequencing (RNA sequencing (RNA-seq)). Gene expression profiles indicated that 139 genes were upregulated and 72 genes were downregulated in the adherent C. sakazakii ATCC BAA-894 strain on HCT-8 cells compared to the cultured bacteria in the cell-free medium. Expressions of some flagella genes and virulence factors involved in adherence were upregulated. High osmolarity and osmotic stress-associated genes were highly upregulated, as well as genes responsible for the synthesis of lipopolysaccharides and outer membrane proteins, iron acquisition systems, and glycerol and glycerophospholipid metabolism. In sum, our study provides further insight into the mechanisms underlying C. sakazakii pathogenesis in the human gastrointestinal tract.
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Singh N, Patil A, Prabhune A, Goel G. Inhibition of quorum-sensing-mediated biofilm formation in Cronobacter sakazakii strains. Microbiology (Reading) 2016; 162:1708-1714. [DOI: 10.1099/mic.0.000342] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Affiliation(s)
- Niharika Singh
- Department of Biotechnology and Bioinformatics, Jaypee University of Information Technology, Waknaghat 173234, India
| | - Amrita Patil
- Biochemical Science Division, National Chemical Laboratory, Pune 411008, India
| | - Asmita Prabhune
- Biochemical Science Division, National Chemical Laboratory, Pune 411008, India
| | - Gunjan Goel
- Department of Biotechnology and Bioinformatics, Jaypee University of Information Technology, Waknaghat 173234, India
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AKSU F, SANDIKÇI ALTUNATMAZ S, ISSA G, ÖZMEN TOGAY S, AKSU H. Prevalence and identification by multiplex polymerase chain reaction patterns of Cronobacter spp. isolated from plant-based foods. FOOD SCIENCE AND TECHNOLOGY 2016. [DOI: 10.1590/1678-457x.16916] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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67
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Lim YC, Rajabalaya R, Lee SHF, Tennakoon KU, Le QV, Idris A, Zulkipli IN, Keasberry N, David SR. Parasitic Mistletoes of the Genera Scurrula and Viscum: From Bench to Bedside. Molecules 2016; 21:E1048. [PMID: 27548121 PMCID: PMC6273404 DOI: 10.3390/molecules21081048] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2016] [Revised: 07/31/2016] [Accepted: 08/04/2016] [Indexed: 01/16/2023] Open
Abstract
The mistletoes, stem hemiparasites of Asia and Europe, have been used as medicinal herbs for many years and possess sophisticated systems to obtain nutrients from their host plants. Although knowledge about ethnomedicinal uses of mistletoes is prevalent in Asia, systematic scientific study of these plants is still lacking, unlike its European counterparts. This review aims to evaluate the literature on Scurrula and Viscum mistletoes. Both mistletoes were found to have anticancer, antimicrobial, antioxidant and antihypertensive properties. Plants from the genus Scurrula were found to inhibit cancer growth due to presence of phytoconstituents such as quercetin and fatty acid chains. Similar to plants from the genus Viscum, Scurrula also possesses TNFα activity to strengthen the immune system to combat cancer. In line with its anticancer activity, both mistletoes are rich in antioxidants that confer protection against cancer as well as neurodegeneration. Extracts from plants of both genera showed evidence of vasodilation and thus, antihypertensive effects. Other therapeutic effects such as weight loss, postpartum and gastrointestinal healing from different plants of the genus Scurrula are documented. As the therapeutic effects of plants from Scurrula are still in exploration stage, there is currently no known clinical trial on these plants. However, there are few on-going clinical trials for Viscum album that demonstrate the functionalities of these mistletoes. Future work required for exploring the benefits of these plants and ways to develop both parasitic plants as a source of pharmacological drug are explained in this article.
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Affiliation(s)
- Ya Chee Lim
- Pengiran Anak Puteri Rashidah Sa'adatul Bolkiah Institute of Health Sciences, Universiti Brunei Darussalam, Jalan Tungku Link, BE 1410 Gadong, Brunei.
| | - Rajan Rajabalaya
- Pengiran Anak Puteri Rashidah Sa'adatul Bolkiah Institute of Health Sciences, Universiti Brunei Darussalam, Jalan Tungku Link, BE 1410 Gadong, Brunei.
| | - Shirley Huan Fang Lee
- Pengiran Anak Puteri Rashidah Sa'adatul Bolkiah Institute of Health Sciences, Universiti Brunei Darussalam, Jalan Tungku Link, BE 1410 Gadong, Brunei.
| | - Kushan U Tennakoon
- Institute for Biodiversity and Environmental Research (IBER), Universiti Brunei Darussalam, Jalan Tungku Link, BE 1410 Gadong, Brunei.
| | - Quang-Vuong Le
- Institute for Biodiversity and Environmental Research (IBER), Universiti Brunei Darussalam, Jalan Tungku Link, BE 1410 Gadong, Brunei.
- Biology Faculty, Vinh University, 182 Le Duan, 470000 Vinh City, Nghe An Province, Vietnam.
| | - Adi Idris
- Pengiran Anak Puteri Rashidah Sa'adatul Bolkiah Institute of Health Sciences, Universiti Brunei Darussalam, Jalan Tungku Link, BE 1410 Gadong, Brunei.
| | - Ihsan N Zulkipli
- Pengiran Anak Puteri Rashidah Sa'adatul Bolkiah Institute of Health Sciences, Universiti Brunei Darussalam, Jalan Tungku Link, BE 1410 Gadong, Brunei.
| | - Natasha Keasberry
- Faculty of Science, Universiti Brunei Darussalam, Jalan Tungku Link, BE 1410 Gadong, Brunei.
| | - Sheba R David
- Pengiran Anak Puteri Rashidah Sa'adatul Bolkiah Institute of Health Sciences, Universiti Brunei Darussalam, Jalan Tungku Link, BE 1410 Gadong, Brunei.
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Song X, Shukla S, Lee G, Park S, Kim M. Detection of Cronobacter Genus in Powdered Infant Formula by Enzyme-linked Immunosorbent Assay Using Anti-Cronobacter Antibody. Front Microbiol 2016; 7:1124. [PMID: 27493642 PMCID: PMC4955378 DOI: 10.3389/fmicb.2016.01124] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2016] [Accepted: 07/06/2016] [Indexed: 11/13/2022] Open
Abstract
Cronobacter species (Cronobacter spp.) are hazardous foodborne pathogens associated with baby food, powdered infant formula (PIF). To develop a rapid and sensitive method for simultaneous detection of seven Cronobacter spp. in PIF, an indirect non-competitive enzyme-linked immunosorbent assay (INC-ELISA) was developed based on a novel immunoglobulin G (IgG), anti-Cronobacter IgG. The developed INC-ELISA was able to detect seven Cronobacter spp. at concentrations ranging from (5.6 ± 0.30) × 10(3) to (2.1 ± 0.01) × 10(5) colony forming unit (CFU)/mL in pure culture. Further, INC-ELISA employing anti-Cronobacter IgG was applicable for analysis of PIF samples contaminated with less than <10 cells of Cronobacter spp. per 25 g of PIF in 36 h. The developed antibody showed slight cross-reactivity with Franconibacter pulveris (LMG 24057) at high concentration (10(8) CFU/mL). The INC-ELISA method displayed excellent specificity without compromising cross-reactivity with other foodborne pathogens. The INC-ELISA assay method developed in this study using a novel anti-Cronobacter IgG facilitated highly sensitive, efficient, and rapid detection of Cronobacter spp. in baby food.
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Affiliation(s)
- Xinjie Song
- Department of Food Science and Technology, Yeungnam University Gyeongsan, South Korea
| | - Shruti Shukla
- Department of Food Science and Technology, Yeungnam University Gyeongsan, South Korea
| | - Gibaek Lee
- Department of Food Science and Technology, Yeungnam University Gyeongsan, South Korea
| | - Sunhyun Park
- Food Standard Research Center, Korea Food Research Institute Seongnam, South Korea
| | - Myunghee Kim
- Department of Food Science and Technology, Yeungnam University Gyeongsan, South Korea
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Parra-Flores J, Juneja V, Garcia de Fernando G, Aguirre J. Variability in Cell Response of Cronobacter sakazakii after Mild-Heat Treatments and Its Impact on Food Safety. Front Microbiol 2016; 7:535. [PMID: 27148223 PMCID: PMC4836016 DOI: 10.3389/fmicb.2016.00535] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2016] [Accepted: 04/01/2016] [Indexed: 12/05/2022] Open
Abstract
Cronobacter spp. have been responsible for severe infections in infants associated with consumption of powdered infant formula and follow-up formulae. Despite several risk assessments described in published studies, few approaches have considered the tremendous variability in cell response that small micropopulations or single cells can have in infant formula during storage, preparation or post process/preparation before the feeding of infants. Stochastic approaches can better describe microbial single cell response than deterministic models as we prove in this study. A large variability of lag phase was observed in single cell and micropopulations of ≤50 cells. This variability increased as the heat shock increased and growth temperature decreased. Obviously, variability of growth of individual Cronobacter sakazakii cell is affected by inoculum size, growth temperature and the probability of cells able to grow at the conditions imposed by the experimental conditions should be taken into account, especially when errors in bottle-preparation practices, such as improper holding temperatures, or manipulation, may lead to growth of the pathogen to a critical cell level. The mean probability of illness from initial inoculum size of 1 cell was below 0.2 in all the cases and for inoculum size of 50 cells the mean probability of illness, in most of the cases, was above 0.7.
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Affiliation(s)
- Julio Parra-Flores
- Departamento de Nutrición y Salud Pública, Universidad del Bío-BíoChillán, Chile
| | - Vijay Juneja
- Residue Chemistry and Predictive Microbiology Research Unit, Eastern Regional Research Center, Agricultural Research Service, United States Department of Agriculture, WyndmoorPA, USA
| | - Gonzalo Garcia de Fernando
- Laboratorio de Microbiología y Probióticos, Instituto de Nutrición y Tecnología de los Alimentos, Universidad de ChileSantiago, Chile
| | - Juan Aguirre
- Laboratorio de Microbiología y Probióticos, Instituto de Nutrición y Tecnología de los Alimentos, Universidad de ChileSantiago, Chile
- Departamento de Nutrición, Bromatología y Tecnología de los Alimentos, Facultad de Veterinaria, Universidad ComplutenseMadrid, Spain
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70
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Hörmansperger JT, Buchmann L, Merz S, Schmitt R, Beyrer M, Windhab EJ. Microbial decontamination of porous model food powders by Vacuum-Steam-Vacuum treatment. INNOV FOOD SCI EMERG 2016. [DOI: 10.1016/j.ifset.2015.12.027] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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71
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The response of foodborne pathogens to osmotic and desiccation stresses in the food chain. Int J Food Microbiol 2016; 221:37-53. [PMID: 26803272 DOI: 10.1016/j.ijfoodmicro.2015.12.014] [Citation(s) in RCA: 124] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2015] [Revised: 12/22/2015] [Accepted: 12/30/2015] [Indexed: 12/24/2022]
Abstract
In combination with other strategies, hyperosmolarity and desiccation are frequently used by the food processing industry as a means to prevent bacterial proliferation, and particularly that of foodborne pathogens, in food products. However, it is increasingly observed that bacteria, including human pathogens, encode mechanisms to survive and withstand these stresses. This review provides an overview of the mechanisms employed by Salmonella spp., Shiga toxin producing E. coli, Cronobacter spp., Listeria monocytogenes and Campylobacter spp. to tolerate osmotic and desiccation stresses and identifies gaps in knowledge which need to be addressed to ensure the safety of low water activity and desiccated food products.
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72
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Ye Y, Jiao R, Gao J, Li H, Ling N, Wu Q, Zhang J, Xu X. Proteins involved in responses to biofilm and planktonic modes in Cronobacter sakazakii. Lebensm Wiss Technol 2016. [DOI: 10.1016/j.lwt.2015.09.039] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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73
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Odeyemi OA, Sani NA. The prevention of Cronobacter infections in hospital neonatal intensive care units. J Infect Public Health 2016; 9:110-2. [DOI: 10.1016/j.jiph.2015.06.012] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2015] [Revised: 06/04/2015] [Accepted: 06/23/2015] [Indexed: 11/27/2022] Open
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Jason J. The Roles of Epidemiologists, Laboratorians, and Public Health Agencies in Preventing Invasive Cronobacter Infection. Front Pediatr 2015; 3:110. [PMID: 26734593 PMCID: PMC4689785 DOI: 10.3389/fped.2015.00110] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/24/2015] [Accepted: 12/04/2015] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Cronobacter can cause severe, invasive infection in very young infants. These bacteria can also colonize or cause insignificant infections in immunocompromised, elderly, and/or hospitalized adults. METHODS This editorial review highlights key points addressed in the Frontiers Research Topic on Cronobacter, discusses the clinical presentation and epidemiology of Cronobacter infections, and examines the responses of public health agencies to this problem. RESULTS Cronobacter is rarely isolated from hospitalized, immunocompromised and/or elderly adults and does not cause significant disease in those patients. Certain species and strains, especially of Cronobacter sakazakii, can cause invasive illness in previously healthy infants <2 months of age. Multilocus sequence type 4 and clonal complex 4 (ST4/MLST 4) C. sakazakii are the predominant cause of Cronobacter meningitis, which occurs only in infants. These infections and this strain type are strongly linked to powdered infant formulas (PIF), which can also be contaminated with other Cronobacter strains. End-product testing is not intended to guarantee the absence of these organisms. WHO has made recommendations that can help decrease but will not eliminate the risk of this infection. CONCLUSION To further define the spectrum of Cronobacter-associated disease, all isolates should be genetically typed using every currently available method, typing results should be linked to the associated epidemiologic and clinical data, and these data should be analyzed in a scientifically sound manner. Based on currently available information, more can be done now to prevent cause invasive infection in young infants. This includes encouragement of exclusive breastfeeding and/or use of commercially sterile ready-to-feed formulas in the first 2 months of life.
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Affiliation(s)
- Janine Jason
- Jason and Jarvis Associates, LLC, Hilton Head Island, SC, USA
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75
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Fang R, Wang Q, Yang B, Zhang J, Cao B, Geng W, Feng X, Yang J, Yang J, Ge W. Prevalence and subtyping of Cronobacter species in goat milk powder factories in Shaanxi province, China. J Dairy Sci 2015; 98:7552-9. [DOI: 10.3168/jds.2015-9661] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2015] [Accepted: 06/18/2015] [Indexed: 11/19/2022]
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Ogrodzki P, Forsythe S. Capsular profiling of the Cronobacter genus and the association of specific Cronobacter sakazakii and C. malonaticus capsule types with neonatal meningitis and necrotizing enterocolitis. BMC Genomics 2015; 16:758. [PMID: 26449318 PMCID: PMC4599207 DOI: 10.1186/s12864-015-1960-z] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2015] [Accepted: 09/29/2015] [Indexed: 12/21/2022] Open
Abstract
Background Cronobacter sakazakii and C. malonaticus can cause serious diseases especially in infants where they are associated with rare but fatal neonatal infections such as meningitis and necrotising enterocolitis. Methods This study used 104 whole genome sequenced strains, covering all seven species in the genus, to analyse capsule associated clusters of genes involved in the biosynthesis of the O-antigen, colanic acid, bacterial cellulose, enterobacterial common antigen (ECA), and a previously uncharacterised K-antigen. Results Phylogeny of the gnd and galF genes flanking the O-antigen region enabled the defining of 38 subgroups which are potential serotypes. Two variants of the colanic acid synthesis gene cluster (CA1 and CA2) were found which differed with the absence of galE in CA2. Cellulose (bcs genes) were present in all species, but were absent in C. sakazakii sequence type (ST) 13 and clonal complex (CC) 100 strains. The ECA locus was found in all strains. The K-antigen capsular polysaccharide Region 1 (kpsEDCS) and Region 3 (kpsMT) genes were found in all Cronobacter strains. The highly variable Region 2 genes were assigned to 2 homology groups (K1 and K2). C. sakazakii and C. malonaticus isolates with capsular type [K2:CA2:Cell+] were associated with neonatal meningitis and necrotizing enterocolitis. Other capsular types were less associated with clinical infections. Conclusion This study proposes a new capsular typing scheme which identifies a possible important virulence trait associated with severe neonatal infections. The various capsular polysaccharide structures warrant further investigation as they could be relevant to macrophage survival, desiccation resistance, environmental survival, and biofilm formation in the hospital environment, including neonatal enteral feeding tubes. Electronic supplementary material The online version of this article (doi:10.1186/s12864-015-1960-z) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- P Ogrodzki
- Pathogen Research Group, School of Science and Technology, Nottingham Trent University, Clifton Lane, NG11 8NS, Nottingham, UK
| | - S Forsythe
- Pathogen Research Group, School of Science and Technology, Nottingham Trent University, Clifton Lane, NG11 8NS, Nottingham, UK.
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77
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Inhibitory effects of d-tryptophan on biofilm development by the foodborne Cronobacter sakazakii. Int Dairy J 2015. [DOI: 10.1016/j.idairyj.2015.05.001] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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78
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Torlak E, Gökmen M, Aydemir S. Efficacy of disinfectants againstCronobacterbiofilm on plastic surfaces. QUALITY ASSURANCE AND SAFETY OF CROPS & FOODS 2015. [DOI: 10.3920/qas2014.0423] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- E. Torlak
- Necmettin Erbakan University, Faculty of Science, Department of Molecular Biology and Genetics, 42090 Konya, Turkey
| | - M. Gökmen
- Balıkesir University, Faculty of Veterinary, Department of Food Hygiene and Technology, 10145 Balıkesir, Turkey
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79
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Microbiological quality of selected spices and herbs including the presence of Cronobacter spp. Food Microbiol 2015; 49:1-5. [DOI: 10.1016/j.fm.2015.01.004] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2014] [Revised: 01/12/2015] [Accepted: 01/19/2015] [Indexed: 11/19/2022]
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Analysis of the cellulose synthase operon genes, bcsA, bcsB, and bcsC in Cronobacter species: Prevalence among species and their roles in biofilm formation and cell-cell aggregation. Food Microbiol 2015; 52:97-105. [PMID: 26338122 DOI: 10.1016/j.fm.2015.07.007] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2015] [Revised: 05/12/2015] [Accepted: 07/03/2015] [Indexed: 11/20/2022]
Abstract
Cronobacter species are emerging food-borne pathogens that cause severe sepsis, meningitis, and necrotizing entercolitis in neonates and infants. Bacterial pathogens such as Escherichia coli and Salmonella species produce extracellular cellulose which has been shown to be involved in rugosity, biofilm formation, and host colonization. In this study the distribution and prevalence of cellulose synthase operon genes (bcsABZC) were determined by polymerase chain reaction (PCR) analysis in 231 Cronobacter strains isolated from clinical, food, environmental, and unknown sources. Furthermore, bcsA and bcsB isogenic mutants were constructed in Cronobacter sakazakii BAA894 to determine their roles. In calcofluor binding assays bcsA and bcsB mutants did not produce cellulose, and their colonial morphotypes were different to that of the parent strain. Biofilm formation and bacterial cell-cell aggregation were significantly reduced in bcsA and bcsB mutants compared to the parental strain. bcsA or bcsAB PCR-negative strains of C. sakazakii did not bind calcofluor, and produced less biofilm and cell-cell aggregation compared to strains possessing bcsAB genes. These data indicated that Cronobacter bcsABZC were present in all clinical isolates and most of food and environmental isolates. bcsA and bcsB genes of Cronobacter were necessary to produce cellulose, and were involved in biofilm formation and cell-cell aggregation.
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81
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Ye Y, Ling N, Jiao R, Wu Q, Han Y, Gao J. Effects of culture conditions on the biofilm formation of Cronobacter sakazakii strains and distribution of genes involved in biofilm formation. Lebensm Wiss Technol 2015. [DOI: 10.1016/j.lwt.2015.01.035] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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82
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Singh N, Goel G, Raghav M. Insights into virulence factors determining the pathogenicity of Cronobacter sakazakii. Virulence 2015; 6:433-40. [PMID: 25950947 PMCID: PMC4601314 DOI: 10.1080/21505594.2015.1036217] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2015] [Revised: 03/25/2015] [Accepted: 03/26/2015] [Indexed: 02/07/2023] Open
Abstract
Cronobacter sakazakii is an opportunistic pathogen associated with outbreaks of life-threatening necrotizing enterocolitis, meningitis and sepsis in neonates and infants. The pathogen possesses an array of virulence factors which aid in tissue adhesion, invasion and host cell injury. Although the identification and validation of C. sakazakii virulence factors has been hindered by availability of suitable neonatal animal model, various studies has reported outer membrane protein A (ompA) as a potential virulence marker. Various other plasmid associated genes such as filamentous hemagglutinin (fhaBC), Cronobacter plasminogen activator (cpa) and genes responsible for iron acquisition (eitCBAD and iucABD/iutA) have been reported in different strains of C. sakazakii. Besides these proposed virulence factors, several biophysical growth factors such as formation of biofilms and resistance to various environmental stresses also contributes to the pathogenic potential of this pathogen. This review provides an update on virulence determinants associated with the pathogenesis of C. sakazakii. The potential reservoirs of the pathogen, mode of transmission and epidemiology are also discussed.
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Affiliation(s)
- Niharika Singh
- Department of Biotechnology and Bioinformatics; Jaypee University of Information Technology; Waknaghat, Solan, India
| | - Gunjan Goel
- Department of Biotechnology and Bioinformatics; Jaypee University of Information Technology; Waknaghat, Solan, India
| | - Mamta Raghav
- Department of Biotechnology and Bioinformatics; Jaypee University of Information Technology; Waknaghat, Solan, India
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83
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Ye Y, Ling N, Jiao R, Wu Q, Han Y, Gao J. Effects of Ca2+
and Mg2+
on the Biofilm Formation of Cronobacter Sakazakii
Strains from Powdered Infant Formula. J Food Saf 2015. [DOI: 10.1111/jfs.12190] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Yingwang Ye
- School of Biotechnology and Food Engineering; Hefei University of Technology; Hefei 230009 China
- State Key Laboratory of Applied Microbiology; South China (the Ministry-Province Joint Development); Guangdong Provincial Key Laboratory of Microbiology Culture Collection and Application; Guangdong Institute of Microbiology; Guangzhou 510070 China
| | - Na Ling
- School of Biotechnology and Food Engineering; Hefei University of Technology; Hefei 230009 China
| | - Rui Jiao
- School of Biotechnology and Food Engineering; Hefei University of Technology; Hefei 230009 China
| | - Qingping Wu
- State Key Laboratory of Applied Microbiology; South China (the Ministry-Province Joint Development); Guangdong Provincial Key Laboratory of Microbiology Culture Collection and Application; Guangdong Institute of Microbiology; Guangzhou 510070 China
| | - Yongjia Han
- School of Biotechnology and Food Engineering; Hefei University of Technology; Hefei 230009 China
| | - Jina Gao
- School of Biotechnology and Food Engineering; Hefei University of Technology; Hefei 230009 China
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Obaidat MM, Alu'Datt MH, Bani Salman AE, Obaidat HM, Al-Zyoud AA, Al-Saleh OK, Abu al'anaz B. Inactivation of nondesiccated and desiccated Cronobacter Sakazakii and Salmonella spp. at low and high inocula levels in reconstituted infant milk formula by vanillin. Food Control 2015. [DOI: 10.1016/j.foodcont.2014.10.035] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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85
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Novel approaches to improve the intrinsic microbiological safety of powdered infant milk formula. Nutrients 2015; 7:1217-44. [PMID: 25685987 PMCID: PMC4344585 DOI: 10.3390/nu7021217] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2014] [Accepted: 01/29/2015] [Indexed: 02/07/2023] Open
Abstract
Human milk is recognised as the best form of nutrition for infants. However; in instances where breast-feeding is not possible, unsuitable or inadequate, infant milk formulae are used as breast milk substitutes. These formulae are designed to provide infants with optimum nutrition for normal growth and development and are available in either powdered or liquid forms. Powdered infant formula is widely used for convenience and economic reasons. However; current manufacturing processes are not capable of producing a sterile powdered infant formula. Due to their immature immune systems and permeable gastro-intestinal tracts, infants can be more susceptible to infection via foodborne pathogenic bacteria than other age-groups. Consumption of powdered infant formula contaminated by pathogenic microbes can be a cause of serious illness. In this review paper, we discuss the current manufacturing practices present in the infant formula industry, the pathogens of greatest concern, Cronobacter and Salmonella and methods of improving the intrinsic safety of powdered infant formula via the addition of antimicrobials such as: bioactive peptides; organic acids; probiotics and prebiotics.
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Xu YZ, Métris A, Stasinopoulos D, Forsythe S, Sutherland J. Effect of heat shock and recovery temperature on variability of single cell lag time of Cronobacter turicensis. Food Microbiol 2015; 45:195-204. [DOI: 10.1016/j.fm.2014.04.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2013] [Revised: 04/03/2014] [Accepted: 04/08/2014] [Indexed: 10/25/2022]
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87
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Prieto MA, Vazquez JA, Murado MA. A new and general model to describe, characterize, quantify and classify the interactive effects of temperature and pH on the activity of enzymes. Analyst 2015; 140:3587-602. [DOI: 10.1039/c4an02136c] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The common approachvs.the modern approach to analyze the effects of temperature and pH on the activity of enzymes.
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Affiliation(s)
- M. A. Prieto
- Superior de Investigaciones Científicas
- Instituto de Investigaciones Marinas (IIM-CSIC)
- Spain
| | - J. A. Vazquez
- Superior de Investigaciones Científicas
- Instituto de Investigaciones Marinas (IIM-CSIC)
- Spain
| | - M. A. Murado
- Superior de Investigaciones Científicas
- Instituto de Investigaciones Marinas (IIM-CSIC)
- Spain
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89
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Torlak E, Gökmen M, Aydemir S. Efficacy of disinfectants against <i>Cronobacter</i> biofilm on plastic surfaces. QUALITY ASSURANCE AND SAFETY OF CROPS & FOODS 2015. [DOI: 10.3920/qas2013.0423] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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90
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Michael M, Phebus R, Thippareddi H, Subbiah J, Birla S, Schmidt K. Validation of radio-frequency dielectric heating system for destruction of Cronobacter sakazakii and Salmonella species in nonfat dry milk. J Dairy Sci 2014; 97:7316-24. [DOI: 10.3168/jds.2013-7862] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2013] [Accepted: 08/19/2014] [Indexed: 11/19/2022]
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91
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Fakruddin M, Rahaman M, Ahmed MM, Hoque MM. Stress tolerant virulent strains of Cronobacter sakazakii from food. Biol Res 2014; 47:63. [PMID: 25723712 PMCID: PMC4335510 DOI: 10.1186/0717-6287-47-63] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2014] [Accepted: 11/10/2014] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Cronobacter sakazakii is considered as an emerging foodborne pathogen. The aim of this study was to isolate and characterize virulent strains of Cronobacter sakazakii from food samples of Bangladesh. RESULT Six (6) Cronobacter sakazakii was isolated and identified from 54 food samples on the basis of biochemical characteristics, sugar fermentation, SDS-PAGE of whole cell protein, plasmid profile and PCR of Cronobacter spp. specific genes (esak, gluA, zpx, ompA, ERIC, BOX-AIR) and sequencing. These strains were found to have moderately high antibiotic resistance against common antibiotics and some are ESBL producer. Most of the C. sakazakii isolates were capable of producing biofilm (strong biofilm producer), extracellular protease and siderophores, curli expression, haemolysin, haemagglutinin, mannose resistant haemagglutinin, had high cell surface hydrophobicity, significant resistance to human serum, can tolerate high concentration of salt, bile and DNase production. Most of them produced enterotoxins of different molecular weight. The isolates pose significant serological cross-reactivity with other gram negative pathogens such as serotypes of Salmonella spp., Shigella boydii, Shigella sonnei, Shigella flexneri and Vibrio cholerae. They had significant tolerance to high temperature, low pH, dryness and osmotic stress. CONCLUSION Special attention should be given in ensuring hygiene in production and post-processing to prevent contamination of food with such stress-tolerant virulent Cronobacter sakazakii.
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Affiliation(s)
- Md Fakruddin
- Industrial Microbiology Laboratory, Institute of Food Science and Technology (IFST), Bangladesh Council of Scientific and Industrial Research (BCSIR), Dhaka, Bangladesh.
| | - Mizanur Rahaman
- Department of Microbiology, University of Dhaka, Dhaka, Bangladesh.
| | - Monzur Morshed Ahmed
- Industrial Microbiology Laboratory, Institute of Food Science and Technology (IFST), Bangladesh Council of Scientific and Industrial Research (BCSIR), Dhaka, Bangladesh.
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92
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Larsen MH, Dalmasso M, Ingmer H, Langsrud S, Malakauskas M, Mader A, Møretrø T, Smole Možina S, Rychli K, Wagner M, John Wallace R, Zentek J, Jordan K. Persistence of foodborne pathogens and their control in primary and secondary food production chains. Food Control 2014. [DOI: 10.1016/j.foodcont.2014.03.039] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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93
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Fate of biofilm cells of Cronobacter sakazakii under modified atmosphere conditions. Lebensm Wiss Technol 2014. [DOI: 10.1016/j.lwt.2014.01.038] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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94
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Jaradat ZW, Al Mousa W, Elbetieha A, Al Nabulsi A, Tall BD. Cronobacter spp.--opportunistic food-borne pathogens. A review of their virulence and environmental-adaptive traits. J Med Microbiol 2014; 63:1023-1037. [PMID: 24878566 DOI: 10.1099/jmm.0.073742-0] [Citation(s) in RCA: 76] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
The genus Cronobacter consists of a diverse group of Gram-negative bacilli and comprises seven species: Cronobacter sakazakii, Cronobacter malonaticus, Cronobacter muytjensii, Cronobacter turicensis, Cronobacter dublinensis, Cronobacter universalis and Cronobacter condimenti. Cronobacter are regarded as opportunistic pathogens, and have been implicated in newborn and infant infections, causing meningitis, necrotizing enterocolitis and bacteraemia or sepsis. Cronobacter virulence is believed to be due to multiple factors. Some strains were found to produce diarrhoea or cause significant fluid accumulation in suckling mice. Two iron acquisition systems (eitCBAD and iucABCD/iutA), Cronobacter plasminogen activator gene (cpa), a 17 kb type VI secretion system (T6SS), and a 27 kb filamentous haemagglutinin gene (fhaBC) and associated putative adhesins locus are harboured on a family of RepFIB-related plasmids (pESA3 and pCTU1), suggesting that these are common virulence plasmids; 98% of 229 tested Cronobacter strains possessed these plasmids. Even though pESA3 and pCTU1 share a common backbone composed of the repA gene and eitCBAD and iucABCD/iutA gene clusters, the presence of cpa, T6SS and FHA loci depended on species, demonstrating a strong correlation with the presence of virulence traits, plasmid type and species. Other factors were observed, in that Cronobacter form biofilms, and show unusual resistance to heat, dry and acid stress growth conditions. The outer-membrane protein A is probably one of the best-characterized virulence markers of Cronobacter. Furthermore, it was reported that Cronobacter employ phosphatidylinositide 3-kinase/Akt signalling, which activates protein kinase C-α and impairs the host cell's mitogen-activated protein kinase pathway, in order to invade cells. Cronobacter can also use immature dendritic cells and macrophages to escape the immune response. This review addresses the various virulence and environmental-adaptive characteristics possessed by members of the genus Cronobacter.
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Affiliation(s)
- Ziad W Jaradat
- Department of Biotechnology and Genetic Engineering, Jordan University of Science and Technology, PO Box 3030, Irbid 22110, Jordan
| | - Waseem Al Mousa
- Department of Biotechnology and Genetic Engineering, Jordan University of Science and Technology, PO Box 3030, Irbid 22110, Jordan
| | - Ahmed Elbetieha
- Department of Biotechnology and Genetic Engineering, Jordan University of Science and Technology, PO Box 3030, Irbid 22110, Jordan
| | - Anas Al Nabulsi
- Department of Nutrition and Food Technology, Jordan University of Science and Technology, PO Box 3030, Irbid 22110, Jordan
| | - Ben D Tall
- Food and Drug Administration, Center for Food Safety and Applied Nutrition, Division of Virulence Assessment, 8301 Muirkirk Road, Laurel, MD 20708, USA
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95
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96
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Holý O, Forsythe S. Cronobacter spp. as emerging causes of healthcare-associated infection. J Hosp Infect 2014; 86:169-77. [DOI: 10.1016/j.jhin.2013.09.011] [Citation(s) in RCA: 142] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2013] [Accepted: 09/19/2013] [Indexed: 11/27/2022]
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97
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Ha JW, Kang DH. Synergistic bactericidal effect of simultaneous near-infrared radiant heating and UV radiation against Cronobacter sakazakii in powdered infant formula. Appl Environ Microbiol 2014; 80:1858-63. [PMID: 24413596 PMCID: PMC3957628 DOI: 10.1128/aem.03825-13] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2013] [Accepted: 01/02/2014] [Indexed: 11/20/2022] Open
Abstract
The aim of this study was to investigate the synergistic bactericidal effects of the simultaneous application of near-infrared (NIR) heating and UV irradiation against Cronobacter sakazakii in powdered infant formula and to determine the effect on quality by measuring color changes and performing sensory evaluation. A cocktail of C. sakazakii strains was inoculated into powdered infant formula, followed by NIR, UV, and combined NIR-UV treatments. The sum of NIR and UV inactivation was lower than that obtained by the simultaneous application of both technologies due to their synergism. Simultaneous NIR-UV combined treatment for 7 min achieved a 2.79-log-unit CFU reduction of C. sakazakii. The underlying inactivation mechanisms of the combined NIR-UV treatment were evaluated by the propidium iodide (PI) uptake test, and we confirmed that disruption of the bacterial cell membrane was the main factor contributing to the synergistic lethal effect. The color values and sensory characteristics of simultaneously NIR-UV-treated infant formula powder were not significantly (P > 0.05) different from those of the control. The results of this study suggest that a NIR-UV decontaminating system can be applied as an alternative to other interventions in powdered weaning foods.
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Affiliation(s)
- Jae-Won Ha
- Department of Food and Animal Biotechnology, Department of Agricultural Biotechnology, Center for Food and Bioconvergence, and Institute of GreenBio Science and Technology, Seoul National University, Seoul, South Korea
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98
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Casalinuovo F, Rippa P, Battaglia L, Parisi N. Isolation of Cronobacter spp. (Enterobacter Sakazakii) from Artisanal Mozzarella. Ital J Food Saf 2014; 3:1526. [PMID: 27800308 PMCID: PMC5076658 DOI: 10.4081/ijfs.2014.1526] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2013] [Revised: 08/30/2013] [Accepted: 09/02/2013] [Indexed: 11/23/2022] Open
Abstract
Cronobacter spp. (Enterobacter sakazakii) is an opportunistic bacterial pathogen capable of causing disease and even fatalities in newborn infants within the first weeks of life if consumed as part of the diet. Premature and immunocompromised newborn infants are at particular risk. The microorganism has been isolated from a variety of foods including contaminated infant milk formula powder and milk powder substitute. The study aimed to evaluate the level of microbiological contamination in 47 samples of mozzarella cheese made with cow's milk collected from artisan cheese producers in Southern Italy. Samples were collected from commercial sales points and underwent qualitative and quantitative microbiological analyses to test for the bacterial contaminants most commonly found in milk and cheese products. The 47 samples underwent qualitative and quantitative microbiological tests according to ISO UNI EN standards. Analyses focused on Staphylococcus aures, Salmonella spp., Listeria monocytogenes, Pseudomonas spp., E. coli, Yersinia spp., total coliforms and Cronobacter sakazakii. The ISO/TS 22964:2006 method was used to investigate possible contamination by C. sakazakii. Biochemical identification was carried out using an automated system for identification and susceptibility tests. None of the samples examined resulted positive for Salmonella spp. or Listeria spp. Only one sample resulted positive for Staphylococcus aureus. Pseudomonas spp. was isolated in 10 (21%) of 47 samples. High levels of total coliforms were found in 10 of 47 samples. Cronobacter spp. (Enterobacter sakazakii) was isolated in one sample. This is the first study to confirm isolation of C. sakazakii in artisan mozzarella cheese made from cow's milk. The presence of C. sakazakii could be related to external contamination during the phases of production or to the use of contaminated milk. Since mozzarella is recommended in the diet of children and adults of all ages, this present study helps define it as a potential vehicle for C. sakazakii in subjects at particular risk.
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Affiliation(s)
- Francesco Casalinuovo
- Istituto Zooprofilattico Sperimentale del Mezzogiorno - Sezione di Catanzaro , Italy
| | - Paola Rippa
- Istituto Zooprofilattico Sperimentale del Mezzogiorno - Sezione di Catanzaro , Italy
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99
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Nurjanah S, T. Suhartono M, Dewanti-Hariyadi R, Estuningsih S. APLIKASI MUTAN BERFLUORESENS UNTUK MEMPELAJARI KETAHANAN HIDUP, KOLONISASI DAN PENETRASI ISOLAT Cronobacter sakazakii SELAMA PENGERINGAN JAGUNG. JURNAL TEKNOLOGI DAN INDUSTRI PANGAN 2013. [DOI: 10.6066/jtip.2013.24.2.184] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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100
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Nyenje ME, Green E, Ndip RN. Evaluation of the effect of different growth media and temperature on the suitability of biofilm formation by Enterobacter cloacae strains isolated from food samples in South Africa. Molecules 2013; 18:9582-93. [PMID: 23966079 PMCID: PMC6270404 DOI: 10.3390/molecules18089582] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2013] [Revised: 07/22/2013] [Accepted: 07/23/2013] [Indexed: 12/12/2022] Open
Abstract
This study evaluated the effects of growth medium, temperature, and incubation time on biofilm formation by Enterobacter cloacae strains. The ability to adhere to a surface was demonstrated using a microtiter plate adherence assay whereas the role of cell surface properties in biofilm formation was assessed using the coaggregation and autoaggregation assays. The architecture of the biofilms was examined under scanning electron microscope (SEM). All the strains adhered to the well of the microtiter plate when incubated for 48 h, irrespective of the growth medium and incubation temperature. It was also noted that 90% and 73% of strains prepared from nutrient broth and cultured in brain heart infusion (BHI) broth and tryptic soy broth (TSB), respectively, were able to form biofilms, in contrast to 73% and 60% strains from nutrient agar and cultured in BHI and TSB respectively grown under similar conditions. However, no statistically significant difference was observed when the two methods were compared. The coaggregation index ranged from 12% to 74%, with the best coaggregate activity observed when partnered with Streptococcus pyogenes (54%-74%). The study indicates the suitability of BHI and TSB medium for the cultivation of E. cloacae biofilms, however, temperature and incubation time significantly affect biofilm formation by these bacteria.
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Affiliation(s)
- Mirriam E. Nyenje
- Department of Biochemistry and Microbiology, Faculty of Science and Agriculture, University of Fort Hare, PMB X1314, Alice 5700, South Africa; E-Mails: (M.E.N.); (E.G.)
| | - Ezekiel Green
- Department of Biochemistry and Microbiology, Faculty of Science and Agriculture, University of Fort Hare, PMB X1314, Alice 5700, South Africa; E-Mails: (M.E.N.); (E.G.)
| | - Roland N. Ndip
- Department of Biochemistry and Microbiology, Faculty of Science and Agriculture, University of Fort Hare, PMB X1314, Alice 5700, South Africa; E-Mails: (M.E.N.); (E.G.)
- Department of Microbiology and Parasitology, Faculty of Science, University of Buea, Box 63, Buea, Cameroon
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