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Ortega-Sanz I, Bocigas C, Melero B, Rovira J. Phase variation modulates the multi-phenotypes displayed by clinical Campylobacter jejuni strains. Food Microbiol 2024; 117:104397. [PMID: 37918995 DOI: 10.1016/j.fm.2023.104397] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 09/15/2023] [Accepted: 10/03/2023] [Indexed: 11/04/2023]
Abstract
The high incidence and prevalence of Campylobacter spp. in the food supply chain entail the importance to understand their mechanisms developed to withstand harsh environmental conditions encountered. Different stress conditions and phenotypic approaches were evaluated to study the behaviour of five clinical C. jejuni isolates with different genotypes, including the tolerance to oxygen and the oxidants hydrogen peroxide and cumene hydroperoxide, the motility and the ability to form biofilm on polystyrene and stainless steel at different temperatures and atmospheres. Whole Genome Sequencing was performed to analyse the occurrence of 216 genes involved in these mechanisms plus phase variation. The isolates showed high tolerance to oxygen and peroxide stress with different swimming motility performances and biofilm formation abilities. Aerotolerance was related with a reduced sensitive to peroxide stress and a loss of motility that promotes biofilm formation depending on the material surface. Comparative genomics did not reveal any clear gene pattern, although phase variation occurring during host infection was observed to be crucial for the modulation of the different survival mechanisms adopted by the bacteria. These findings reveal that the bacteria can combine diverse and complex strategies in an efficient manner to survive and persist in the environment.
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Affiliation(s)
- Irene Ortega-Sanz
- Department of Biotechnology and Food Science, University of Burgos, Burgos, Spain
| | - Carolina Bocigas
- Department of Biotechnology and Food Science, University of Burgos, Burgos, Spain
| | - Beatriz Melero
- Department of Biotechnology and Food Science, University of Burgos, Burgos, Spain
| | - Jordi Rovira
- Department of Biotechnology and Food Science, University of Burgos, Burgos, Spain.
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Hur JI, Kim J, Kang MS, Kim HJ, Ryu S, Jeon B. Cold tolerance in Campylobacter jejuni and its impact on food safety. Food Res Int 2024; 175:113683. [PMID: 38129027 DOI: 10.1016/j.foodres.2023.113683] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2023] [Revised: 10/30/2023] [Accepted: 11/03/2023] [Indexed: 12/23/2023]
Abstract
Campylobacter jejuni is a major cause of foodborne illnesses worldwide and is primarily transmitted to humans through contaminated poultry meat. To control this pathogen, it is critical to understand its cold tolerance because poultry products are usually distributed in the cold chain. However, there is limited information regarding how this thermotolerant, microaerophilic pathogen can survive in cold and aerobic environments in the poultry cold chain. In this study, we investigated the cold tolerance of C. jejuni by measuring the viability of 90 C. jejuni strains isolated from retail raw chicken at 4 °C under aerobic and microaerobic conditions. Despite the microaerophilic nature of C. jejuni, under aerobic conditions, C. jejuni exhibited higher viability at 4 °C and required an extended inactivation time compared to microaerobic conditions. Some strains were highly tolerant to refrigeration temperatures and exhibited increased survival at 4 °C. These cold-tolerant strains mostly belonged to multilocus sequence typing (MLST) clonal complex (CC)-21 and CC-443, indicating that cold tolerance is associated with the phylogeny of C. jejuni. Notably, cold-tolerant strains had an increased probability of illness and were more likely to cause human infections due to their extended survival on refrigerated chicken meat compared to those sensitive to cold stress. Furthermore, the majority of cold-tolerant strains exhibited elevated aerotolerance, indicating that cold tolerance is related to aerotolerance. These findings suggest that refrigeration of chicken meat under aerobic conditions may not be effective at controlling C. jejuni and that cold-tolerant C. jejuni can pose an increased risk to food safety.
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Affiliation(s)
- Jeong In Hur
- Department of Food and Animal Biotechnology, Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea; Department of Agricultural Biotechnology, Seoul National University, Seoul 08826, Republic of Korea
| | - Jinshil Kim
- Department of Food and Animal Biotechnology, Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea; Department of Agricultural Biotechnology, Seoul National University, Seoul 08826, Republic of Korea; Center for Food and Bioconvergence, Seoul National University, Seoul 08826, Republic of Korea; Department of Food Science & Biotechnology, and Carbohydrate Bioproduct Research Center, Sejong University, Seoul 05006, Republic of Korea
| | - Mi Seon Kang
- Research Group of Consumer Safety, Korea Food Research Institute, Wanju 55365, Republic of Korea; Department of Food Biotechnology, University of Science and Technology, Daejeon 34113, Republic of Korea
| | - Hyun Jung Kim
- Research Group of Consumer Safety, Korea Food Research Institute, Wanju 55365, Republic of Korea; Department of Food Biotechnology, University of Science and Technology, Daejeon 34113, Republic of Korea.
| | - Sangryeol Ryu
- Department of Food and Animal Biotechnology, Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea; Department of Agricultural Biotechnology, Seoul National University, Seoul 08826, Republic of Korea; Center for Food and Bioconvergence, Seoul National University, Seoul 08826, Republic of Korea.
| | - Byeonghwa Jeon
- Division of Environmental Health Sciences, School of Public Health, University of Minnesota, St. Paul, MN 55108, USA.
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Marcos-Fernández R, Blanco-Míguez A, Ruiz L, Margolles A, Ruas-Madiedo P, Sánchez B. Towards the isolation of more robust next generation probiotics: The first aerotolerant Bifidobacterium bifidum strain. Food Res Int 2023; 165:112481. [PMID: 36869494 DOI: 10.1016/j.foodres.2023.112481] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Revised: 11/20/2022] [Accepted: 01/11/2023] [Indexed: 01/19/2023]
Abstract
This work reports on the first described aerotolerant Bifidobacterium bifidum strain, Bifidobacterium bifidum IPLA60003, which has the ability to form colonies on the surface of agar plates under aerobic conditions, a weird phenotype that to our knowledge has never been observed in B. bifidum. The strain IPLA60003 was generated after random UV mutagenesis from an intestinal isolate. It incorporates 26 single nucleotide polymorphisms that activate the expression of native oxidative-defense mechanisms such as the alkyl hydroxyperoxide reductase, the glycolytic pathway and several genes coding for enzymes involved in redox reactions. In the present work, we discuss the molecular mechanisms underlying the aerotolerance phenotype of B. bifidum IPLA60003, which will open new strategies for the selection and inclusion of probiotic gut strains and next generation probiotics into functional foods.
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Affiliation(s)
- Raquel Marcos-Fernández
- Functionality and Ecology of Beneficial Microbes (MicroHealth) Group, Department of Microbiology and Biochemistry of Dairy Products, Instituto de Productos Lácteos de Asturias - Consejo Superior de Investigaciones Científicas (IPLA-CSIC), Villaviciosa, Asturias, Spain; Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), Oviedo, Asturias, Spain
| | - Aitor Blanco-Míguez
- Functionality and Ecology of Beneficial Microbes (MicroHealth) Group, Department of Microbiology and Biochemistry of Dairy Products, Instituto de Productos Lácteos de Asturias - Consejo Superior de Investigaciones Científicas (IPLA-CSIC), Villaviciosa, Asturias, Spain; Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), Oviedo, Asturias, Spain
| | - Lorena Ruiz
- Functionality and Ecology of Beneficial Microbes (MicroHealth) Group, Department of Microbiology and Biochemistry of Dairy Products, Instituto de Productos Lácteos de Asturias - Consejo Superior de Investigaciones Científicas (IPLA-CSIC), Villaviciosa, Asturias, Spain; Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), Oviedo, Asturias, Spain
| | - Abelardo Margolles
- Functionality and Ecology of Beneficial Microbes (MicroHealth) Group, Department of Microbiology and Biochemistry of Dairy Products, Instituto de Productos Lácteos de Asturias - Consejo Superior de Investigaciones Científicas (IPLA-CSIC), Villaviciosa, Asturias, Spain; Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), Oviedo, Asturias, Spain
| | - Patricia Ruas-Madiedo
- Functionality and Ecology of Beneficial Microbes (MicroHealth) Group, Department of Microbiology and Biochemistry of Dairy Products, Instituto de Productos Lácteos de Asturias - Consejo Superior de Investigaciones Científicas (IPLA-CSIC), Villaviciosa, Asturias, Spain; Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), Oviedo, Asturias, Spain.
| | - Borja Sánchez
- Functionality and Ecology of Beneficial Microbes (MicroHealth) Group, Department of Microbiology and Biochemistry of Dairy Products, Instituto de Productos Lácteos de Asturias - Consejo Superior de Investigaciones Científicas (IPLA-CSIC), Villaviciosa, Asturias, Spain; Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), Oviedo, Asturias, Spain.
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Mouftah SF, Cobo-Díaz JF, Álvarez-Ordóñez A, Mousa A, Calland JK, Pascoe B, Sheppard SK, Elhadidy M. Stress resistance associated with multi-host transmission and enhanced biofilm formation at 42 °C among hyper-aerotolerant generalist Campylobacter jejuni. Food Microbiol 2020; 95:103706. [PMID: 33397624 DOI: 10.1016/j.fm.2020.103706] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Revised: 11/26/2020] [Accepted: 11/27/2020] [Indexed: 02/08/2023]
Abstract
One of the emerging conundrums of Campylobacter food-borne illness is the bacterial ability to survive stressful environmental conditions. We evaluated the heterogeneity among 90 C. jejuni and 21 C. coli isolates from different sources in Egypt with respect to biofilm formation capabilities (under microaerobic and aerobic atmosphere) and resistance to a range of stressors encountered along the food chain (aerobic stress, refrigeration, freeze-thaw, heat, peracetic acid, and osmotic stress). High prevalence (63%) of hyper-aerotolerant (HAT) isolates was observed, exhibiting also a significantly high tolerance to heat, osmotic stress, refrigeration, and freeze-thaw stress, coupled with high biofilm formation ability which was clearly enhanced under aerobic conditions, suggesting a potential link between stress adaptation and biofilm formation. Most HAT multi-stress resistant and strong biofilm producing C. jejuni isolates belonged to host generalist clonal complexes (ST-21, ST-45, ST-48 and ST-206). These findings highlight the potential role of oxidative stress response systems in providing cross-protection (resistance to other multiple stress conditions) and enhancing biofilm formation in Campylobacter and suggest that selective pressures encountered in hostile environments have shaped the epidemiology of C. jejuni in Egypt by selecting the transmission of highly adapted isolates, thus promoting the colonization of multiple host species by important disease-causing lineages.
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Affiliation(s)
- Shaimaa F Mouftah
- University of Science and Technology, Zewail City of Science and Technology, Giza, Egypt
| | - José F Cobo-Díaz
- Department of Food Hygiene and Technology and Institute of Food Science and Technology, Universidad de León, Spain
| | - Avelino Álvarez-Ordóñez
- Department of Food Hygiene and Technology and Institute of Food Science and Technology, Universidad de León, Spain
| | - Ahmed Mousa
- University of Science and Technology, Zewail City of Science and Technology, Giza, Egypt
| | - Jessica K Calland
- The Milner Centre of Evolution, University of Bath, Claverton Down, Bath, UK
| | - Ben Pascoe
- The Milner Centre of Evolution, University of Bath, Claverton Down, Bath, UK; Chiang Mai University, Chiang Mai, Thailand
| | - Samuel K Sheppard
- The Milner Centre of Evolution, University of Bath, Claverton Down, Bath, UK; Chiang Mai University, Chiang Mai, Thailand; Department of Zoology, University of Oxford, Oxford, UK
| | - Mohamed Elhadidy
- University of Science and Technology, Zewail City of Science and Technology, Giza, Egypt; Department of Bacteriology, Mycology and Immunology, Faculty of Veterinary Medicine, Mansoura University, Mansoura, Egypt.
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Song H, Kim J, Guk JH, An JU, Lee S, Cho S. Complete genome sequence and comparative genomic analysis of hyper-aerotolerant Campylobacter lari strain SCHS02 isolated from duck for its potential pathogenicity. Microb Pathog 2020; 142:104110. [PMID: 32130978 DOI: 10.1016/j.micpath.2020.104110] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Revised: 02/27/2020] [Accepted: 02/27/2020] [Indexed: 11/20/2022]
Abstract
Campylobacter lari strain SCHS02, a novel hyper-aerotolerant strain that survives under aerobic conditions, was isolated from retail duck meat. The genome is a single chromosome of 1,520,838 base pairs, with a mean GC content of 29.7%. It harbors 1546 protein-coding sequences and 45 tRNA and 9 rRNA genes. Genes associated with the oxidative stress response, including perR, bcp, ahpC, and sodB, were identified in the genome. Furthermore, 68 virulence-related genes were identified and sorted into 9 classes and 14 subclasses. The virulence gene profile of SCHS02 was similar to those of two human clinical C. lari isolates. Comparative genomic analysis of strain SCHS02 and 18 C. lari strains retrieved from a public database revealed the core and accessory gene profiles of C. lari strains, as well as putative core gene involved in halotolerance. Phylogenetic analysis revealed that strain SCHS02 is genetically related to isolates from bird samples and human clinical isolates, rather than to isolates from other environmental sources. These findings reveal essential genomic information about the newly identified hyper-aerotolerant C. lari strain isolated from a duck source, providing a basis for future studies of the strain considering its potential threat to public health and further research of the pathogenicity of C. lari.
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Affiliation(s)
- Hyokeun Song
- College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul, South Korea.
| | - Junhyung Kim
- College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul, South Korea.
| | - Jae-Ho Guk
- College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul, South Korea.
| | - Jae-Uk An
- College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul, South Korea.
| | - Soomin Lee
- College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul, South Korea.
| | - Seongbeom Cho
- College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul, South Korea.
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Lee H, Lee S, Kim S, Ha J, Lee J, Choi Y, Oh H, Kim Y, Lee Y, Yoon Y. The risk of aerotolerant Campylobacter jejuni strains in poultry meat distribution and storage. Microb Pathog 2019; 134:103537. [PMID: 31145980 DOI: 10.1016/j.micpath.2019.05.020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2019] [Revised: 05/03/2019] [Accepted: 05/12/2019] [Indexed: 11/28/2022]
Abstract
Poultry meat is a major vector for Campylobacter jejuni foodborne illness. Since C. jejuni is microaerophillic, the cell counts gradually decreased during distribution and display under aerobic condition. However, if the pathogen can resist to aerobic condition, it may cause serious problem in food safety. This study determined the aerotolerance of C. jejuni isolated from poultry and the risk of the aerotolerant C. jejuni strains. Fourteen C. jejuni strains isolated from poultry were subjected to aerobic condition in a shaking incubator at 500 rpm and 37 °C. The cell counts of C. jejuni strains were enumerated on modified CCDA-Preston at 0, 24, 72 and 120 h, and the strains, having reduction less than 2 Log CFU/mL for 120 h were determined as aerotolerant C. jejuni strain. Non-aerotolerant and aerotolerant C. jejuni strains were then incubated at 4 °C under aerobic condition to compare the growth between aerotolerant and non-aerotolerant strains. In addition, transcriptomes for virulence and stress response genes (cadF, cdtB, ciaB, clpP and htrB) were compared between non-aerotolerant and aerotolerant C. jejuni strains. Among 14 C. jejuni strains, seven strains (50%) showed less than 2-Log CFU/mL reduction at 37 °C after 24 h, and five strains of them still showed less than 2-Log CFU/mL reduction after 48 h. Especially, C. jejuni SMFM2015-Du7 and C. jejuni SMFM2014-Du16 were still survived after 120 h under aerobic condition, which were then determined as aerotolerant C. jejuni. However, at 4 °C under aerobic condition, there were no significant differences in the reduction of C. jejuni cell counts and virulence gene expressions between non-aerotolerant (C. jejuni SMFM2014-Du8) and aerotolerant strains (C. jejuni SMFM2015-Du7 and C. jejuni SMFM2014-Du16) except for stress response gene (htrB). These results indicate that there are aerotolerant C. jejuni strains, but their risk is similar to non-aerotolerant C. jejuni strains at 4 °C under aerobic condition, which is distribution and storage condition for poultry meat. Therefore, additional food safety management for the aerotolerant C. jejuni is not necessary.
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Affiliation(s)
- Heeyoung Lee
- Food Standard Research Center, Korea Food Research Institute, Jeollabuk-do, 55365, South Korea
| | - Soomin Lee
- Risk Analysis Research Center, Sookmyung Women's University, Seoul, 04310, South Korea
| | - Sejeong Kim
- Risk Analysis Research Center, Sookmyung Women's University, Seoul, 04310, South Korea
| | - Jimyeong Ha
- Risk Analysis Research Center, Sookmyung Women's University, Seoul, 04310, South Korea
| | - Jeeyeon Lee
- Risk Analysis Research Center, Sookmyung Women's University, Seoul, 04310, South Korea
| | - Yukyung Choi
- Risk Analysis Research Center, Sookmyung Women's University, Seoul, 04310, South Korea; Department of Food and Nutrition, Sookmyung Women's University, Seoul, 04310, South Korea
| | - Hyemin Oh
- Risk Analysis Research Center, Sookmyung Women's University, Seoul, 04310, South Korea; Department of Food and Nutrition, Sookmyung Women's University, Seoul, 04310, South Korea
| | - Yujin Kim
- Risk Analysis Research Center, Sookmyung Women's University, Seoul, 04310, South Korea; Department of Food and Nutrition, Sookmyung Women's University, Seoul, 04310, South Korea
| | - Yewon Lee
- Risk Analysis Research Center, Sookmyung Women's University, Seoul, 04310, South Korea; Department of Food and Nutrition, Sookmyung Women's University, Seoul, 04310, South Korea
| | - Yohan Yoon
- Risk Analysis Research Center, Sookmyung Women's University, Seoul, 04310, South Korea; Department of Food and Nutrition, Sookmyung Women's University, Seoul, 04310, South Korea.
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Brock CM, Bañó-Polo M, Garcia-Murria MJ, Mingarro I, Esteve-Gasent M. Characterization of the inner membrane protein BB0173 from Borrelia burgdorferi. BMC Microbiol 2017; 17:219. [PMID: 29166863 PMCID: PMC5700661 DOI: 10.1186/s12866-017-1127-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2017] [Accepted: 11/15/2017] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND The bacterial spirochete Borrelia burgdorferi is the causative agent of the most commonly reported arthropod-borne illness in the United States, Lyme disease. A family of proteins containing von Willebrand Factor A (VWFA) domains adjacent to a MoxR AAA+ ATPase have been found to be highly conserved in the genus Borrelia. Previously, a VWFA domain containing protein of B. burgdorferi, BB0172, was determined to be an outer membrane protein capable of binding integrin α3β1. In this study, the characterization of a new VWFA domain containing membrane protein, BB0173, is evaluated in order to define the location and topology of this multi-spanning membrane protein. In addition, functional predictions are made. RESULTS Our results show that BB0173, in contrast to BB0172, is an inner membrane protein, in which the VWFA domain is exposed to the periplasmic space. Further, BB0173 was predicted to have an aerotolerance regulator domain, and expression of BB0173 and the surrounding genes was evaluated under aerobic and microaerophilic conditions, revealing that these genes are downregulated under aerobic conditions. Since the VWFA domain containing proteins of B. burgdorferi are highly conserved, they are likely required for survival of the pathogen through sensing diverse environmental oxygen conditions. CONCLUSIONS Presently, the complex mechanisms that B. burgdorferi uses to detect and respond to environmental changes are not completely understood. However, studying the mechanisms that allow B. burgdorferi to survive in the highly disparate environments of the tick vector and mammalian host could allow for the development of novel methods of preventing acquisition, survival, or transmission of the spirochete. In this regard, a putative membrane protein, BB0173, was characterized. BB0173 was found to be highly conserved across pathogenic Borrelia, and additionally contains several truly transmembrane domains, and a Bacteroides aerotolerance-like domain. The presence of these functional domains and the highly conserved nature of this protein, strongly suggests a required function of BB0173 in the survival of B. burgdorferi.
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Affiliation(s)
- Christina M Brock
- Department of Veterinary Pathobiology, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, TAMU-4467, College Station, TX, 77843, USA.,Current affiliation: Department of Entomology, College of Agricultural and Life Sciences, Texas A&M University, College Station, USA
| | - Manuel Bañó-Polo
- Department of Biochemistry and Molecular Biology, Estructura de Recerca Interdisciplinar en Biotecnologia i Biomedicina (ERI BioTecMed), Faculty of Biology, University of Valencia, E-46100, Burjassot, Valencia, Spain
| | - Maria J Garcia-Murria
- Department of Biochemistry and Molecular Biology, Estructura de Recerca Interdisciplinar en Biotecnologia i Biomedicina (ERI BioTecMed), Faculty of Biology, University of Valencia, E-46100, Burjassot, Valencia, Spain
| | - Ismael Mingarro
- Department of Biochemistry and Molecular Biology, Estructura de Recerca Interdisciplinar en Biotecnologia i Biomedicina (ERI BioTecMed), Faculty of Biology, University of Valencia, E-46100, Burjassot, Valencia, Spain
| | - Maria Esteve-Gasent
- Department of Veterinary Pathobiology, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, TAMU-4467, College Station, TX, 77843, USA.
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