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Liu W, Zhu C, Gao S, Ma K, Zhang S, Du Q, Sui K, Liu C, Chi Z. A biosensor encompassing fusarinine C-magnetic nanoparticles and aptamer-red/green carbon dots for dual-channel fluorescent and RGB discrimination of Campylobacter and Aliarcobacter. Talanta 2024; 266:125085. [PMID: 37619471 DOI: 10.1016/j.talanta.2023.125085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Revised: 07/29/2023] [Accepted: 08/15/2023] [Indexed: 08/26/2023]
Abstract
The diarrhea pathogens Campylobacter and Aliarcobacter are similar in morphology and their leading symptoms, making them difficult to be differentially diagnosed. Herein, we report a biosensor with two modules to differentiate the genera-representative species of C. jejuni and A. butzleri. Module 1 was fusarinine C-decorated magnetic nanoparticles; module 2 consisted of C. jejuni-specific aptamer modified with red-emitting carbon dots (CDs) and A. butzleri-specific aptamer-modified green-emitting CDs, consisting non-interfering dual-fluorescence detection channels. Module 1 was used to selectively capture C. jejuni and A. butzleri from an un-cultured sample, and the specific CDs in module 2 would then recognize and bind to their counterpart bacteria when subjected to the collected module 1-bacteria complex. By measuring the fluorescence intensities from the CDs-bound bacteria, the abundance of each bacterium could be differentially indicated. This biosensor exhibited a wide detection range of up to 1 × 107 CFU/mL and the lowest limit of detection (LOD) of 1 CFU/mL, for each bacterium. Thus, the biosensor with dual-fluorescent channels facilitated a culture-independent, ultrasensitive and discriminative detection of C. jejuni and A. butzleri. Remarkably, this fluorescent detection could be transformed into RGB color indication to render the visual discrimination. After the biosensor was coupled with microfluidics, a biosensing platform was developed, which could render fluorescent and RGB differentiation of the two bacteria in human stool or chicken broilers, achieving a LOD of 5 CFU/mL and turnaround time of 65 min. This work established the first biosensor-based methodology for the discriminative detection of Campylobacter and Aliarcobacter in real samples.
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Affiliation(s)
- Weixing Liu
- College of Marine Life Sciences, Ocean University of China, No. 5 Yushan Road, 266003, Qingdao, China
| | - Chengrui Zhu
- Haide College, Ocean University of China, No. 238 Songling Road, 266100, Qingdao, China
| | - Shaoqian Gao
- Haide College, Ocean University of China, No. 238 Songling Road, 266100, Qingdao, China
| | - Keran Ma
- Haide College, Ocean University of China, No. 238 Songling Road, 266100, Qingdao, China
| | - Shangxian Zhang
- Haide College, Ocean University of China, No. 238 Songling Road, 266100, Qingdao, China
| | - Qingbao Du
- College of Marine Life Sciences, Ocean University of China, No. 5 Yushan Road, 266003, Qingdao, China; Qingdao Sinova-HK Biotechnology Co., Ltd, No. 5138 Haixi Middle Road, 266423, Qingdao, China
| | - Kangmin Sui
- Qingdao Municipal Hospital, University of Health and Rehabilitation Science, No. 5 Donghai Middle Road, 266071, Qingdao, China.
| | - Chenguang Liu
- College of Marine Life Sciences, Ocean University of China, No. 5 Yushan Road, 266003, Qingdao, China
| | - Zhe Chi
- College of Marine Life Sciences, Ocean University of China, No. 5 Yushan Road, 266003, Qingdao, China.
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Okada A, Tsuchida M, Rahman MM, Inoshima Y. Two-Round Treatment With Propidium Monoazide Completely Inhibits the Detection of Dead Campylobacter spp. Cells by Quantitative PCR. Front Microbiol 2022; 13:801961. [PMID: 35547143 PMCID: PMC9082804 DOI: 10.3389/fmicb.2022.801961] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Accepted: 03/28/2022] [Indexed: 11/13/2022] Open
Abstract
Campylobacter spp. are known as important foodborne gastroenteric pathogens worldwide. Campylobacter spp. can exist in a viable but non-culturable (VBNC) state under unsuitable environmental conditions, which is undetectable by conventional culture methods. Quantitative polymerase chain reaction (qPCR) can be used to detect VBNC Campylobacter spp.; however, both viable and dead bacteria are detected during qPCR and are indistinguishable. Propidium monoazide (PMA), which can only enter dead bacterial cells through a damaged cell wall/cell membrane, binds to DNA and inhibits qPCR. PMA treatment has been performed along with qPCR (PMA-qPCR) to detect viable bacteria. However, the efficacy of detection inhibition differed among studies, and PMA can potentially enter living cells after changes in cell membrane permeability. In this study, we optimized the PMA treatment method by conducting it before qPCR. Two-round PMA treatment completely inhibited the qPCR signals from dead cells, whereas single-round PMA treatment failed to facilitate this. An optimized PMA-qPCR method was developed using commercial chicken meat, and VBNC Campylobacter spp., which are undetectable using conventional culture-based methods, were successfully detected. In conclusion, this study presents a novel, efficient PMA treatment method for the detection of viable Campylobacter spp., including VBNC Campylobacter spp., in chicken meat. We believe that this method will aid the reliable risk assessment of commercial chicken meat.
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Affiliation(s)
- Ayaka Okada
- Laboratory of Food and Environmental Hygiene, Faculty of Applied Biological Sciences, Cooperative Department of Veterinary Medicine, Gifu University, Gifu, Japan.,Education and Research Center for Food Animal Health, Gifu University (GeFAH), Gifu, Japan
| | - Mizuki Tsuchida
- Laboratory of Food and Environmental Hygiene, Faculty of Applied Biological Sciences, Cooperative Department of Veterinary Medicine, Gifu University, Gifu, Japan
| | - Md Matiur Rahman
- Laboratory of Food and Environmental Hygiene, Faculty of Applied Biological Sciences, Cooperative Department of Veterinary Medicine, Gifu University, Gifu, Japan.,The United Graduate School of Veterinary Sciences, Gifu University, Gifu, Japan.,Department of Medicine, Faculty of Veterinary, Animal and Biomedical Sciences, Sylhet Agricultural University, Sylhet, Bangladesh
| | - Yasuo Inoshima
- Laboratory of Food and Environmental Hygiene, Faculty of Applied Biological Sciences, Cooperative Department of Veterinary Medicine, Gifu University, Gifu, Japan.,Education and Research Center for Food Animal Health, Gifu University (GeFAH), Gifu, Japan.,The United Graduate School of Veterinary Sciences, Gifu University, Gifu, Japan.,Joint Graduate School of Veterinary Sciences, Gifu University, Gifu, Japan
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Cegar S, Kuruca L, Vidovic B, Antic D, Hauge SJ, Alvseike O, Blagojevic B. Risk categorisation of poultry abattoirs on the basis of the current process hygiene criteria and indicator microorganisms. Food Control 2022. [DOI: 10.1016/j.foodcont.2021.108530] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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Cheng X, Liu W, Wang Z, Yang R, Yu L, Du Q, Ge A, Liu C, Chi Z. Improved triple-module fluorescent biosensor for the rapid and ultrasensitive detection of Campylobacter jejuni in livestock and dairy. Food Control 2022. [DOI: 10.1016/j.foodcont.2022.108905] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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Alter T, Reich F. Management Strategies for Prevention of Campylobacter Infections Through the Poultry Food Chain: A European Perspective. Curr Top Microbiol Immunol 2021; 431:79-102. [PMID: 33620649 DOI: 10.1007/978-3-030-65481-8_4] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/08/2022]
Abstract
Numerous studies point out that at present, a complete elimination of Campylobacter species in the poultry food chain is not feasible. Thus, the current aim should be to establish control measures and intervention strategies to minimize the occurrence of Campylobacter spp. in livestock (esp. poultry flocks) and to reduce the quantitative Campylobacter burden along the food chain in animals and subsequently in foods. The most effective measures to mitigate Campylobacter focus on the primary production stage. Nevertheless, measures applied during slaughter and processing complement the general meat hygiene approaches by reducing fecal contamination during slaughtering and processing and as a consequence help to reduce Campylobacter in poultry meat. Such intervention measures at slaughter and processing level would include general hygienic improvements, technological innovations and/or decontamination measures that are applied at single slaughter or processing steps. In particular, approaches that do not focus on a single intervention measure would need to be based on a thorough process of evaluation, and potential combinatory effects have to be modeled and tested. Finally, the education of all stakeholders (including retailers, food handlers and consumers) is required and will help to increase awareness for the presence of foodborne pathogens in raw meat and meat products and can thus aid in the development of the required good kitchen hygiene.
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Affiliation(s)
- Thomas Alter
- Center for Veterinary Public Health, Institute of Food Safety and Food Hygiene, Free University Berlin, Koenigsweg 69, Berlin, 14163, Germany.
| | - Felix Reich
- German Federal Institute for Risk Assessment, Max-Dohrn-Strasse 8-10, Berlin, 10589, Germany
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Duqué B, Canon J, Haddad N, Guillou S, Membré JM. Quantitative approach to assess the compliance to a performance objective (PO) of Campylobacter jejuni in poultry meat in France. Int J Food Microbiol 2020; 336:108916. [PMID: 33091756 DOI: 10.1016/j.ijfoodmicro.2020.108916] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Revised: 08/19/2020] [Accepted: 10/04/2020] [Indexed: 11/28/2022]
Abstract
Predictive modelling is used in microbiological risk assessment to quantify the growth and inactivation of microorganisms through the use of mathematical models. Campylobacter jejuni is one of the main foodborne pathogens and broiler meat is considered as the most important source of human campylobacteriosis. The purpose of this study was to assess the effects of heating and chilling during the poultry slaughter process on inactivation kinetics of Campylobacter jejuni during chilled storage in order to predict its contamination level prior to preparation and consumption in the consumer's home, and then to assess the compliance to a Performance Objective (PO). Three strains of C. jejuni were submitted to consecutive heat (54 °C for 3 min) and cold (3 °C for 2 h) stresses, mimicking the two main slaughtering steps, i.e. scalding and chilling, by inoculating chicken fillets with three different concentrations (4, 6 and 8 log10 CFU/g). Fillets were then stored at 6 °C during 17 days under the modified atmosphere currently used by food processors (70% O2/30% CO2). For all strains, bacterial log reduction was the lowest when inoculated at 8 log10 CFU/g. One strain showed an enhanced resistance during cold storage after application of stressing steps, suggesting an impact of the cell history on further bacterial resistance. Taking strain variability into account, after six days of storage, predictions showed compliance of ready-to-be-cooked chicken meat with a hypothetical PO of 2.55 log10 CFU/g, value set before the meat enters the consumer's home by the ICMSF (International Commission on Microbiological Specifications for Foods). This study opens the path to assess the compliance to a PO of Campylobacter jejuni in poultry meat and more generally provides inputs to refine microbiological risk assessment by taking into account the cell history and more particularly the impact of stressful steps on the subsequent inactivation at consumer's home.
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Assessing Campylobacter Colonization of Broiler Herds Ante Mortem and Monitoring Campylobacter Contamination Post Mortem by qPCR. Pathogens 2020; 9:pathogens9090742. [PMID: 32927630 PMCID: PMC7559911 DOI: 10.3390/pathogens9090742] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 08/31/2020] [Accepted: 09/07/2020] [Indexed: 11/17/2022] Open
Abstract
Human campylobacteriosis is the most prevalent zoonosis, with chicken meat contributing substantially to the number of cases. Measures to avoid or at least reduce exposure by meat contaminated with Campylobacter (C.) spp. are needed. With regard to the process hygiene criterion introduced in 2018 for Campylobacter spp. on broiler carcasses, we evaluated the performance of a recently developed quantitative real-time PCR (qPCR) for C. jejuni/coli on random caecal samples and chicken meat. With the qPCR on pooled caecal samples not only C. jejuni/coli positive (69.6%) versus negative broiler herds (30.4%) were identified, but herds highly colonized with C. jejuni/coli (39.4%) could also be identified. From the chicken meat samples, 8.0% were positive for C. jejuni/coli by qPCR and 0.7% by enumeration (>10 cfu/g) compared to 58.3% using cultural enrichment. Given the higher sensitivity, the qPCR method could replace the currently used enumeration method to assess the process hygiene criterion for Campylobacter spp. on broiler carcasses. Moreover, with the qPCR, a reliable identification of C. jejuni/coli colonized incoming broiler herds a few days before slaughter is feasible, which provides important information to optimize slaughter processes. Finally, identifying and monitoring herds with high C. jejuni/coli colonization rates could help to individually improve biosecurity measures at farm level, eventually reducing the C. jejuni/coli load on chicken meat.
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The ability to detect campylobacter presence and concentration using different chicken carcass samples. Food Control 2020. [DOI: 10.1016/j.foodcont.2020.107294] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Rawat N, Maansi, Kumar D, Upadhyay AK. Virulence typing and antibiotic susceptibility profiling of thermophilic Campylobacters isolated from poultry, animal, and human species. Vet World 2018; 11:1698-1705. [PMID: 30774261 PMCID: PMC6362333 DOI: 10.14202/vetworld.2018.1698-1705] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2018] [Accepted: 10/11/2018] [Indexed: 01/23/2023] Open
Abstract
Background and Aim: Campylobacteriosis finds its place among the four important global foodborne illnesses. The disease, though self-limiting, needs antibacterial therapy in extraintestinal complications. Therefore, the present study was designed to estimate the prevalence of thermophilic Campylobacters in poultry, animals, and humans of the Kumaon region of Uttarakhand. Materials and Methods: A total of 609 samples comprising of poultry ceca (n=116), poultry droppings (n=203), and feces of pigs (n=71), cattle (n=61), sheep (n=19), goat (n=17), human beings (n=88), and laboratory animals (n=34) (rats, rabbits, and guinea pigs) were collected. The thermophilic Campylobacters, Campylobacter jejuni and Campylobacter coli were confirmed using multiplex polymerase chain reaction. The isolates were also screened for the presence of virulence genes, and their antibiotic susceptibility testing was done against eight antibiotics. Results: An overall prevalence of 6.24% was revealed with highest from poultry ceca (15.52%), followed by poultry droppings (5.91%), cattle feces (4.92%), human stools (3.40%), and pig feces (2.82%). The virulence genes, namely cadF, flaA, virB11, and pldA, were present in 38 (100%), 37 (97.37%), 7 (18.42%), and 14 (36.84%) isolates, respectively. All the isolates were resistant to nalidixic acid, while all were sensitive to erythromycin and co-trimoxazole. Conclusion: It was concluded that the animals and humans in the region harbored the thermophilic Campylobacters which may contribute to the human illness. Resistance shown among the isolates may complicate the antimicrobial therapy.
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Affiliation(s)
- Neelam Rawat
- Department of Veterinary Public Health and Epidemiology, College of Veterinary and Animal Sciences, Govind Ballabh Pant University of Agriculture and Technology, Pantnagar, Uttarakhand, India
| | - Maansi
- Department of Veterinary Public Health and Epidemiology, College of Veterinary and Animal Sciences, Govind Ballabh Pant University of Agriculture and Technology, Pantnagar, Uttarakhand, India
| | - Deepak Kumar
- Department of Veterinary Public Health and Epidemiology, College of Veterinary and Animal Sciences, Govind Ballabh Pant University of Agriculture and Technology, Pantnagar, Uttarakhand, India
| | - A K Upadhyay
- Department of Veterinary Public Health and Epidemiology, College of Veterinary and Animal Sciences, Govind Ballabh Pant University of Agriculture and Technology, Pantnagar, Uttarakhand, India
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