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Zhang J, Gao P, Wu Y, Yan X, Ye C, Liang W, Yan M, Xu X, Jiang H. Identification of foodborne pathogenic bacteria using confocal Raman microspectroscopy and chemometrics. Front Microbiol 2022; 13:874658. [PMID: 36419427 PMCID: PMC9676656 DOI: 10.3389/fmicb.2022.874658] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2022] [Accepted: 10/17/2022] [Indexed: 11/04/2023] Open
Abstract
Rapid and accurate identification of foodborne pathogenic bacteria is of great importance because they are often responsible for the majority of serious foodborne illnesses. The confocal Raman microspectroscopy (CRM) is a fast and easy-to-use method known for its effectiveness in detecting and identifying microorganisms. This study demonstrates that CRM combined with chemometrics can serve as a rapid, reliable, and efficient method for the detection and identification of foodborne pathogenic bacteria without any laborious pre-treatments. Six important foodborne pathogenic bacteria including S. flexneri, L. monocytogenes, V. cholerae, S. aureus, S. typhimurium, and C. botulinum were investigated with CRM. These pathogenic bacteria can be differentiated based on several characteristic peaks and peak intensity ratio. Principal component analysis (PCA) was used for investigating the difference of various samples and reducing the dimensionality of the dataset. Performances of some classical classifiers were compared for bacterial detection and identification including decision tree (DT), artificial neural network (ANN), and Fisher's discriminant analysis (FDA). Correct recognition ratio (CRR), area under the receiver operating characteristic curve (ROC), cumulative gains, and lift charts were used to evaluate the performance of models. The impact of different pretreatment methods on the models was explored, and pretreatment methods include Savitzky-Golay algorithm smoothing (SG), standard normal variate (SNV), multivariate scatter correction (MSC), and Savitzky-Golay algorithm 1st Derivative (SG 1st Der). In the DT, ANN, and FDA model, FDA is more robust for overfitting problem and offers the highest accuracy. Most pretreatment methods raised the performance of the models except SNV. The results revealed that CRM coupled with chemometrics offers a powerful tool for the discrimination of foodborne pathogenic bacteria.
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Affiliation(s)
- Jin Zhang
- Criminal Investigation School, People’s Public Security University of China, Beijing, China
- State Key Laboratory for Infectious Disease Prevention and Control, National Institute for Communicable Diseases Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Pengya Gao
- State Key Laboratory for Infectious Disease Prevention and Control, National Institute for Communicable Diseases Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Yuan Wu
- State Key Laboratory for Infectious Disease Prevention and Control, National Institute for Communicable Diseases Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Xiaomei Yan
- State Key Laboratory for Infectious Disease Prevention and Control, National Institute for Communicable Diseases Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Changyun Ye
- State Key Laboratory for Infectious Disease Prevention and Control, National Institute for Communicable Diseases Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Weili Liang
- State Key Laboratory for Infectious Disease Prevention and Control, National Institute for Communicable Diseases Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Meiying Yan
- State Key Laboratory for Infectious Disease Prevention and Control, National Institute for Communicable Diseases Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Xuefang Xu
- State Key Laboratory for Infectious Disease Prevention and Control, National Institute for Communicable Diseases Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Hong Jiang
- Criminal Investigation School, People’s Public Security University of China, Beijing, China
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Lee L, Samardzic K, Wallach M, Frumkin LR, Mochly-Rosen D. Immunoglobulin Y for Potential Diagnostic and Therapeutic Applications in Infectious Diseases. Front Immunol 2021; 12:696003. [PMID: 34177963 PMCID: PMC8220206 DOI: 10.3389/fimmu.2021.696003] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Accepted: 05/26/2021] [Indexed: 01/14/2023] Open
Abstract
Antiviral, antibacterial, and antiparasitic drugs and vaccines are essential to maintaining the health of humans and animals. Yet, their production can be slow and expensive, and efficacy lost once pathogens mount resistance. Chicken immunoglobulin Y (IgY) is a highly conserved homolog of human immunoglobulin G (IgG) that has shown benefits and a favorable safety profile, primarily in animal models of human infectious diseases. IgY is fast-acting, easy to produce, and low cost. IgY antibodies can readily be generated in large quantities with minimal environmental harm or infrastructure investment by using egg-laying hens. We summarize a variety of IgY uses, focusing on their potential for the detection, prevention, and treatment of human and animal infections.
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Affiliation(s)
- Lucia Lee
- Department of Chemical and Systems Biology, Stanford University School of Medicine, Stanford, CA, United States
| | - Kate Samardzic
- Department of Chemical and Systems Biology, Stanford University School of Medicine, Stanford, CA, United States
| | - Michael Wallach
- School of Life Sciences, University of Technology, Sydney, NSW, Australia
| | | | - Daria Mochly-Rosen
- Department of Chemical and Systems Biology, Stanford University School of Medicine, Stanford, CA, United States
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Su Z, Li Y, Pan L, He Z, Liu L, Zhang M. Nitrogen removal performance, quantitative detection and potential application of a novel aerobic denitrifying strain, Pseudomonas sp. GZWN4 isolated from aquaculture water. Bioprocess Biosyst Eng 2021; 44:1237-1251. [PMID: 33599872 DOI: 10.1007/s00449-021-02523-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Accepted: 01/28/2021] [Indexed: 11/25/2022]
Abstract
A novel Pseudomonas sp. GZWN4 with the aerobic nitrogen removal ability was isolated from aquaculture water, whose removal efficiency of NO2--N, NO3--N and NH4+-N was 99.72%, 82.54% and 98.62%, respectively. The key genes involved in nitrogen removal, nxr, napA, narI, nirS, norB and nosZ, were successfully amplified and by combination with the results of nitrogen balance analysis, it was inferred that the denitrification pathway of strain GZWN4 was NO3--N → NO2--N → NO → N2O → N2. The strain GZWN4 had excellent nitrite removal performance at pH 7.0-8.5, temperature 25-30 ℃, C/N ratio 5-20, salinity 8-32‰ and dissolved oxygen concentration 2.52-5.73 mg L-1. The receivable linear correlation (R2 = 0.9809) was obtained with the range of quantification between l03 and 108 CFU mL-1 of the strain by enzyme-linked immunosorbent assay. Strain GZWN4 could maintain high abundance in the actual water and wastewater of mariculture and the removal efficiency of TN were 52.57% and 63.64%, respectively. The safety evaluation experiment showed that the strain GZWN4 had no hemolysis and high biosecurity toward shrimp Litopenaeus vannamei. The excellent nitrogen removal ability and adaptability to aquaculture environment made strain GZWN4 a promising candidate for treatment of water and wastewater in aquaculture.
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Affiliation(s)
- Zhaopeng Su
- The Key Laboratory of Mariculture, Ministry of Education, Fisheries College, Ocean University of China, Yushan Road 5, Qingdao, 266003, Shandong, China
| | - Yun Li
- The Key Laboratory of Mariculture, Ministry of Education, Fisheries College, Ocean University of China, Yushan Road 5, Qingdao, 266003, Shandong, China.
| | - Luqing Pan
- The Key Laboratory of Mariculture, Ministry of Education, Fisheries College, Ocean University of China, Yushan Road 5, Qingdao, 266003, Shandong, China
| | - Ziyan He
- The Key Laboratory of Mariculture, Ministry of Education, Fisheries College, Ocean University of China, Yushan Road 5, Qingdao, 266003, Shandong, China
| | - Liping Liu
- The Key Laboratory of Mariculture, Ministry of Education, Fisheries College, Ocean University of China, Yushan Road 5, Qingdao, 266003, Shandong, China
| | - Mengyu Zhang
- The Key Laboratory of Mariculture, Ministry of Education, Fisheries College, Ocean University of China, Yushan Road 5, Qingdao, 266003, Shandong, China
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Mi F, Guan M, Hu C, Peng F, Sun S, Wang X. Application of lectin-based biosensor technology in the detection of foodborne pathogenic bacteria: a review. Analyst 2021; 146:429-443. [DOI: 10.1039/d0an01459a] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Foodborne diseases caused by pathogenic bacteria pose a serious threat to human health.
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Affiliation(s)
- Fang Mi
- College of Chemistry and Chemical Engineering
- Xinjiang normal University
- Urumqi
- China
- Xinjiang bingtuan Xingxin Vocational and Technical College
| | - Ming Guan
- College of Chemistry and Chemical Engineering
- Xinjiang normal University
- Urumqi
- China
| | - Cunming Hu
- College of Chemistry and Chemical Engineering
- Xinjiang normal University
- Urumqi
- China
| | - Fei Peng
- College of Chemistry and Chemical Engineering
- Xinjiang normal University
- Urumqi
- China
| | - Shijiao Sun
- College of Chemistry and Chemical Engineering
- Xinjiang normal University
- Urumqi
- China
| | - Xiaomei Wang
- College of Chemistry and Chemical Engineering
- Xinjiang normal University
- Urumqi
- China
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Wang L, Lyu S, Gu G, Bolten S. Selection of aptamers targeted to food-borne pathogenic bacteria Vibrio parahaemolyticus. Food Sci Nutr 2020; 8:3835-3842. [PMID: 32724645 PMCID: PMC7382169 DOI: 10.1002/fsn3.1677] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Revised: 05/08/2020] [Accepted: 05/09/2020] [Indexed: 11/11/2022] Open
Abstract
Vibrio parahaemolyticus (Vp) is a common marine halophilic food-borne pathogen, mainly found in seafood and food with a high salt content. Gastrointestinal reactions such as diarrhea, headache, vomiting, nausea, and abdominal cramps may occur after eating food infected with Vp. This study aimed to screen for high-affinity aptamers that specifically recognize Vp. A high-affinity modified aptamer screening kit was used to rapidly screen aptamers of the food-borne Vp. The first round of screening involved release of target aptamers from the microspheres. The "false-positive" aptamers were eliminated after specific binding to and elution of Vp in the second round. The second round of screening of the aptamers involved polymerase chain reaction (PCR), and the abundance of a sequence was determined using next-generation sequencing. Nine high-affinity aptamer sequences were obtained, and the first eight modified aptamer sequences were derived using a cloud-based intelligent software of the American AM Biotech Co. Escherichia coli (E. coli) was used as a control, and aptamer ID 12 with the highest affinity for Vp was selected using real-time PCR. According to the principle of color change caused by nano-gold condensing under salt induction, Salmonella, Listeria monocytogenes (L. monocytogenes), and E. coli were used as counter-screening bacteria, and the aptamer ID12 was combined with nano-gold. The results showed that aptamer ID12 has strong specificity for Vp. Based on these findings, this study developed a simple, innovative, and rapid method for screening Vp aptamers.
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Affiliation(s)
- Lan Wang
- College of Food Science and EngineeringShenyang Agricultural UniversityShenyangChina
| | - Shuxia Lyu
- College of Food Science and EngineeringShenyang Agricultural UniversityShenyangChina
- College of Bioscience and BiotechnologyShenyang Agricultural UniversityShenyangChina
| | - Ganyu Gu
- Environmental Microbiology and Food Safety Laboratory of USDA Agriculture Research Service at Beltsville Agriculture Research CenterBeltsvilleMarylandUSA
| | - Samantha Bolten
- Environmental Microbiology and Food Safety Laboratory of USDA Agriculture Research Service at Beltsville Agriculture Research CenterBeltsvilleMarylandUSA
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Priyanka B, Patil RK, Dwarakanath S. A review on detection methods used for foodborne pathogens. Indian J Med Res 2017; 144:327-338. [PMID: 28139531 PMCID: PMC5320838 DOI: 10.4103/0971-5916.198677] [Citation(s) in RCA: 89] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
Foodborne pathogens have been a cause of a large number of diseases worldwide and more so in developing countries. This has a major economic impact. It is important to contain them, and to do so, early detection is very crucial. Detection and diagnostics relied on culture-based methods to begin with and have developed in the recent past parallel to the developments towards immunological methods such as enzyme-linked immunosorbent assays (ELISA) and molecular biology-based methods such as polymerase chain reaction (PCR). The aim has always been to find a rapid, sensitive, specific and cost-effective method. Ranging from culturing of microbes to the futuristic biosensor technology, the methods have had this common goal. This review summarizes the recent trends and brings together methods that have been developed over the years.
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Affiliation(s)
- B Priyanka
- Department of Applied Zoology, Mangalore University, Mangaluru, India
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Romero M, D'Agostino M, Arias AP, Robles S, Casado CF, Iturbe LO, Lerma OG, Andreou M, Cook N. An immunomagnetic separation/loop-mediated isothermal amplification method for rapid direct detection of thermotolerant Campylobacter
spp. during poultry production. J Appl Microbiol 2016; 120:469-77. [DOI: 10.1111/jam.13008] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2015] [Revised: 11/06/2015] [Accepted: 11/13/2015] [Indexed: 11/28/2022]
Affiliation(s)
| | | | | | - S. Robles
- Fera Science Ltd.; Sand Hutton York UK
| | | | | | | | | | - N. Cook
- Fera Science Ltd.; Sand Hutton York UK
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Oyarzabal OA, Williams A, Zhou P, Samadpour M. Improved protocol for isolation of Campylobacter spp. from retail broiler meat and use of pulsed field gel electrophoresis for the typing of isolates. J Microbiol Methods 2013; 95:76-83. [DOI: 10.1016/j.mimet.2013.03.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2012] [Revised: 03/06/2013] [Accepted: 03/11/2013] [Indexed: 10/27/2022]
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Williams A, Oyarzabal OA. Prevalence of Campylobacter spp. in skinless, boneless retail broiler meat from 2005 through 2011 in Alabama, USA. BMC Microbiol 2012; 12:184. [PMID: 22920043 PMCID: PMC3490988 DOI: 10.1186/1471-2180-12-184] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2012] [Accepted: 08/22/2012] [Indexed: 11/22/2022] Open
Abstract
BACKGROUND The prevalence of Campylobacter spp. in 755 skinless, boneless retail broiler meat samples (breast, tenderloins and thighs) collected from food stores in Alabama, USA, from 2005 through 2011 was examined. Campylobacter spp. were isolated using enrichment and plate media. Isolates were identified with multiplex PCR assays and typed with pulsed field gel electrophoresis (PFGE). Data were analyzed by nominal variables (brand, plant, product, season, state and store) that may affect the prevalence of these bacteria. RESULTS The average prevalence of Campylobacter spp. in retail broiler meat for these years was 41%, with no statistical differences in the prevalence by year (P > 0.05). Seasons did not affect the prevalence of C. jejuni but statistically affected the prevalence of C. coli (P < 0.05). The prevalence by brand, plant, product, state and store were different (P < 0.05). Establishments from two states had the highest prevalence (P < 0.05). C. coli and C. jejuni had an average prevalence of 28% and 66%, respectively. The prevalence of C. coli varied by brand, plant, season, state, store and year, while the prevalence of C. jejuni varied by brand, product, state and store. Tenderloins had a lower prevalence of Campylobacter spp. than breasts and thighs (P < 0.05). Although no statistical differences (P > 0.05) were observed in the prevalence of C. jejuni by season, the lowest prevalence of C. coli was recorded from October through March. A large diversity of PFGE profiles was found for C. jejuni, with some profiles from the same processing plants reappearing throughout the years. CONCLUSIONS The prevalence of Campylobacter spp. did not change during the seven years of the study; however, it did change when analyzed by brand, product and state. Seasons did not affect the prevalence of C. jejuni, but they did affect the prevalence of C. coli. Larger PFGE databases are needed to assess the temporal reoccurrence of PFGE profiles to help predict the risk associated with each profile.
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Affiliation(s)
- Aretha Williams
- Department of Biological Sciences, Alabama State University, 1627 Hall Street, Montgomery, AL, USA
| | - Omar A Oyarzabal
- Department of Biological Sciences, Alabama State University, 1627 Hall Street, Montgomery, AL, USA
- IEH Laboratories & Consulting Group, 15300 Bothell Way NE, Lake Forest Park, WA, 98155, USA
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Zhang J, Zhou X. Novel 3-dimensional dendrimer platform for glycolipid microarray. Biosens Bioelectron 2011; 28:355-61. [PMID: 21820887 PMCID: PMC3163748 DOI: 10.1016/j.bios.2011.07.044] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2011] [Revised: 07/04/2011] [Accepted: 07/18/2011] [Indexed: 12/11/2022]
Abstract
Glycolipids are important biological molecules that modulate cellular recognitions and pathogen adhesions. In this paper, we report a sensitive glycolipid microarray for non-covalently immobilizing glycolipids on a microarray substrate and we perform a set of immunoassays to explore glycolipid-protein interactions. This substrate utilizes a three-dimensional hydrazide-functionalized dendrimer monolayer attached onto a microscopic glass surface, which possesses the characteristics to adsorb glycoliplids non-covalently and facilitates multivalent attributes on the substrate surface. In the proof-of-concept experiments, gangliosides such as GM1, FucGM1, GM3, GD1b, GT1b, and GQ1b, and a lipoarabinomannan were tested on the substrate and interrogated with toxins and antibodies. The resulting glycolipid microarrays exhibited hypersensitivity and specificity for detection of glycolipid-protein interactions. In particular, a robust and specific binding of a pentameric cholera toxin B subunit to the GM1 glycolipid spotted on the array has demonstrated its superiority in sensitivity and specificity. In addition, this glycolipid microarray substrate was used to detect lipoarabinomannan in buffer within a limit-of-detection of 125 ng/mL. Furthermore, Mycobacterium tuberculosis (Mtb) Lipoarabinomannan was tested in human urine specimens on this platform, which can effectively identify urine samples either infected or not infected with Mtb. The results of this work suggest the possibility of using this glycolipid microarray platform to fabricate glycoconjugate microarrays, which includes free glycans and glycolipids and potential application in detection of pathogen and toxin.
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Affiliation(s)
- Jian Zhang
- ADA Technologies Inc., 8100 Shaffer Parkway, Suite 130, Littleton, CO 80127, USA.
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SUZUKI H, YAMAMOTO S. Campylobacter Contamination in Retail Poultry Meats and By-Products in the World: A Literature Survey. J Vet Med Sci 2009; 71:255-61. [DOI: 10.1292/jvms.71.255] [Citation(s) in RCA: 107] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Affiliation(s)
- Hodaka SUZUKI
- Division of Biomedical Food Research, National Institute of Health Sciences
| | - Shigeki YAMAMOTO
- Division of Biomedical Food Research, National Institute of Health Sciences
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12
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Characterization of rabbit antibodies for immunochemical detection of Yersinia enterocolitica. Folia Microbiol (Praha) 2008; 52:511-8. [PMID: 18298049 DOI: 10.1007/bf02932112] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Rabbit IgG raised against whole cells of Yersinia enterocolitica O:3, O:9 and against a group of pathogenic Y. enterocolitica strains (serotypes O:3, O:5,27, O:8. and O:9) were prepared. The antibody limiting titers were within the range of 1:9.5 x 10(4)-1:7.5 x 10(5). The immunoblotting analysis of Yersinia lipopolysacchides separated by SDS-PAGE showed that IgG against the single serotype O:3 interacted with high-molar-mass LPS of O:3 whereas other antibodies were bound to low-molar-mass LPS of serotypes O:3, O:5,27, O:9 and strain Y. enterocolitica (CNCTC Y 2/68). IgG against the group of pathogenic serotypes also weakly interacted with low-molar-mass LPS of serotypes O:5, O:6,30, and O:10. The cross-reactivity of the antibodies with Y. pseudotuberculosis Ia and/or Y. rohdei b, d, e, f, i, which was observed by means of dot-blotting procedure using the whole bacterial cells as an antigen, was shown not to be caused by LPS of these bacteria. The prepared antibodies were used in the development of indirect competitive ELISA. At the optimum concentration of the immunoreactants the detection limits were within the range of 3-7 x 10(6) colony-forming units per mL.
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Hochel I, Slavíčková D, Viochna D, Škvor J, Steinhauserová I. Detection ofCampylobacterspecies in foods by indirect competitive ELISA using hen and rabbit antibodies. FOOD AGR IMMUNOL 2007. [DOI: 10.1080/09540100701666857] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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Wei D, Oyarzabal OA, Huang TS, Balasubramanian S, Sista S, Simonian AL. Development of a surface plasmon resonance biosensor for the identification of Campylobacter jejuni. J Microbiol Methods 2007; 69:78-85. [PMID: 17258830 DOI: 10.1016/j.mimet.2006.12.002] [Citation(s) in RCA: 85] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2006] [Revised: 12/01/2006] [Accepted: 12/01/2006] [Indexed: 11/21/2022]
Abstract
The purpose of this study was to develop a biosensor based on surface plasmon resonance (SPR) for the rapid identification of C. jejuni in broiler samples. We examined the specificity and sensitivity of commercial antibodies against C. jejuni with six Campylobacter strains and six non-Campylobacter bacterial strains. Antigen-antibody interactions were studied using enzyme-linked immunosorbent assay (ELISA) and a commercially available SPR biosensor platform (Spreeta). Campylobacter cells killed with 0.5% formalin had significant lower antibody reactivity when compared to live cells, or cells inactivated with 0.5% thimerosal or heat (70 degrees C for 3 min) using ELISA. The SPR biosensor showed a good sensitivity with commercial antibodies against C. jejuni at 10(3) CFU/ml and a low cross reactivity with Salmonella serotype typhimurium. The sensitivity of the SPR was similar when testing spiked broiler meat samples. However, research is still needed to reduce the high background observed when sampling meat products.
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Affiliation(s)
- Dong Wei
- Department of Poultry Science, Auburn University, AL, USA
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15
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Kopecký O, Lukesová S, Horácek J, Parízková R. Campylobacter sepsis with multiple organ failure in IgG subclass deficiency. Folia Microbiol (Praha) 2006; 51:604-8. [PMID: 17455798 DOI: 10.1007/bf02931626] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Some patients with immunodeficiency develop clinical features of autoimmune disorders. A previously asymptomatic antibody deficiency can underlie the development of autoimmune diseases and a severe course of infection, with a risk of sepsis; such cases are known in selective IgA deficiency. On the other hand, little information is available on selective IgG subclass deficiencies. An unexpectedly severe course of Campylobacter infection in a 19-year-old woman with a previously undiagnosed complex immune disorder, including selective IgG1 immunodeficiency, Hashimoto's autoimmune thyroiditis with hypothyroidism combined with Addison's disease presumably due to autoimmune adrenalitis, autoimmunity and allergy is described. The pathophysiological mechanisms of autoimmunity in latent humoral defects are discussed.
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Affiliation(s)
- O Kopecký
- Institute of Clinical Immunology and Allergology, University Hospital Hradec Králové, Charles University in Prague, Faculty of Medicine in Hradec Králové, Czechia.
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Jelínek D, Miketová P, Khailová L, Schram KH, Moore IM, Vytrasová J. Identification of Arcobacter species using phospholipid and total fatty acid profiles. Folia Microbiol (Praha) 2006; 51:329-36. [PMID: 17007438 DOI: 10.1007/bf02931826] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
High-performance liquid chromatography (HPLC) and gas chromatography-mass spectrometry (GC-MS) were used to analyze the phospholipids and fatty acids of four Arcobacter species (becoming routinely isolated from a wide variety of food sources, especially of animal origin) to provide information for the identification within these species. Phospholipid differences were observed in the HPLC profiles. GC-MS analysis provided a complete fatty acid composition for each arcobacter that after pattern recognition analysis allows taxonomic classification of each species.
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Affiliation(s)
- D Jelínek
- College of Pharmacy, University of Arizona, Tucson, USA
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17
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Gondo T, Sekizuka T, Manaka N, Murayama O, Millar BC, Moore JE, Matsuda M. Demonstration of the shorter flagellin (flaA) gene of urease-positive thermophilicCampylobacter isolated from the natural environment in Northern Ireland. Folia Microbiol (Praha) 2006; 51:183-90. [PMID: 17004648 DOI: 10.1007/bf02932120] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
The PCR amplicons (about 1450 bp in length) of flaA gene fragments of 11 isolates of urease-positive thermophilic Campylobacter (UPTC) isolated from the natural environment not including wild birds in Northern Ireland were demonstrated to be shorter than those of C. jejuni 81116 and six isolates of C. jejuni and C. coli (about 1700 bp) isolated in Northern Ireland and Japan. When the nucleotide lengths of the possible open reading frame (ORF) of the flaA genes were determined, those from the 11 UPTC isolates were estimated to be 1464-1503 bp, and those from the six C. jejuni and C. coli isolates and C. jejuni 81116 strain to be 1716-1728 bp. Nucleotide sequence and deduced amino acid sequence alignments of the possible ORFs demonstrated that the ORFs from the 11 UPTC isolates lack about 80 amino acid residues, mainly from the approximate residue numbers 390-470 of the large variable region in the flaA protein of the seven isolates of C. jejuni and C. coli, and do not have any internal termination codons. High amino acid sequence similarity of both amino- and carboxy-termini of the ORFs of the flaA gene was demonstrated between the 11 isolates of UPTC and the 7 isolates of C. jejuni and C. coli. The 11 UPTC isolates examined were strongly suggested to possess a shorter flaA gene without any internal termination codons.
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Affiliation(s)
- T Gondo
- Laboratory ofMolecular Biology, School of Environmental Health Sciences, Azabu University, Sagamihara 229-8501, Japan
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Hutchison ML, Walters LD, Allen VM, Mead GC, Howell M. Measurement of Campylobacter numbers on carcasses in British poultry slaughterhouses. J Food Prot 2006; 69:421-4. [PMID: 16496586 DOI: 10.4315/0362-028x-69.2.421] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
An assessment of the proposed new International Organization for Standardization quantitative method for Campylobacter was undertaken on poultry carcass samples collected after the chilling phase of processing. Using a critical differences method, we determined the uncertainty associated with log-transformed Campylobacter numbers by dual analyses of 346 samples collected from 22 processing plants located throughout the United Kingdom. Overall, using log-transformed Campylobacter numbers that ranged between -1 and 5 log, we calculated the expanded measurement of uncertainty (EMU) to be 3.889 for the new method. The EMU changed when ranges of bacterial numbers were grouped for analyses. For low numbers of Campylobacter (< 1 log), the EMU was calculated to be 5.622. There was less measurement error with higher bacterial numbers because the EMU was found to be 0.612 for samples containing Campylobacter numbers of 3 log or above. The draft method was used to measure numbers of Campylobacters on poultry carcasses collected from 18 United Kingdom processing plants in summer and winter. Numbers were significantly lower in winter. We conclude that, although the new method is adequate at quantifying high numbers of Campylobacter on poultry carcasses, further development is required to improve the measurement of small numbers of this causative agent of foodborne illness.
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Affiliation(s)
- M L Hutchison
- Research Division, DLS-Eurofins, Wolverhampton, West Midlands, UK.
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Sabatková Z, Pazlarová J, Demnerová K. Sample processing effect on polymerase chain reaction used for identification ofCampylobacter jejuni. Folia Microbiol (Praha) 2004; 49:693-7. [PMID: 15881405 DOI: 10.1007/bf02931551] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Model samples of Campylobacter jejuni for polymerase chain reaction (PCR) were prepared by rapid and simple procedures consisting of centrifugation, proteinase K treatment, Chelex 100 treatment, and boiling lyses. A PCR based on specific amplification of the variable sequence of 16S rRNA gene was performed using Tth DNA polymerase and the PCR products were visualized by agarose gel electrophoresis. The assay allowed the detection of 10 CFU/mL C. jejuni in the physiological saline and 100 CFU/mL in the basic Park and Sanders broth.
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Affiliation(s)
- Z Sabatková
- Department of Biochemistry and Microbiology, Institute of Chemical Technology, 166 28 Prague 6, Czechia.
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