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Wang Y, Hou Y, Liu X, Lin N, Dong Y, Liu F, Xia W, Zhao Y, Xing W, Chen J, Chen C. Rapid visual nucleic acid detection of Vibrio alginolyticus by recombinase polymerase amplification combined with CRISPR/Cas13a. World J Microbiol Biotechnol 2023; 40:51. [PMID: 38146036 DOI: 10.1007/s11274-023-03847-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Accepted: 11/18/2023] [Indexed: 12/27/2023]
Abstract
Vibrio alginolyticus (V. alginolyticus) is a common pathogen in the ocean. In addition to causing serious economic losses in aquaculture, it can also infect humans. The rapid detection of nucleic acids of V. alginolyticus with high sensitivity and specificity in the field is very important for the diagnosis and treatment of infection caused by V. alginolyticus. Here, we established a simple, fast and effective molecular method for the identification of V. alginolyticus that does not rely on expensive instruments and professionals. The method integrates recombinase polymerase amplification (RPA) technology with CRISPR system in a single PCR tube. Using this method, the results can be visualized by lateral flow dipstick (LFD) in less than 50 min, we named this method RPA-CRISPR/Cas13a-LFD. The method was confirmed to achieve high specificity for the detection of V. alginolyticus with no cross-reactivity with similar Vibrio and common clinical pathogens. This diagnostic method shows high sensitivity; the detection limit of the RPA-CRISPR/Cas13a-LFD is 10 copies/µL. We successfully identified 35 V. alginolyticus strains from a total of 55 different bacterial isolates and confirmed their identity by (Matrix-assisted laser desorption ionization time-of-flight mass spectrometry, MALDI-TOF MS). We also applied this method on infected mice blood, and the results were both easily and rapidly obtained. In conclusion, RPA-CRISPR/Cas13a-LFD offers great potential as a useful tool for reliable and rapid diagnosis of V. alginolyticus infection, especially in limited conditions.
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Affiliation(s)
- Yanan Wang
- Department of Clinical Laboratory, The Six Medical Center of PLA General Hospital, No. 6 Fucheng Road, Beijing, 100048, China
- Hebei North University, Zhangjiakou, Hebei, China
| | - Yachao Hou
- Department of Clinical Laboratory, The Six Medical Center of PLA General Hospital, No. 6 Fucheng Road, Beijing, 100048, China
- Hebei North University, Zhangjiakou, Hebei, China
| | - Xinping Liu
- Department of Clinical Laboratory, The Six Medical Center of PLA General Hospital, No. 6 Fucheng Road, Beijing, 100048, China
| | - Na Lin
- Institute of Clinical Laboratory, The 900Th Hospital, Xiamen University, Fuzhou, China
| | - Youyou Dong
- Department of Clinical Laboratory, The Six Medical Center of PLA General Hospital, No. 6 Fucheng Road, Beijing, 100048, China
| | - Fei Liu
- Institute of Clinical Laboratory, The 900Th Hospital, Xiamen University, Fuzhou, China
| | - Wenrong Xia
- Bei Jing Institute of Basic Medical Sciences, Beijing, China
| | - Yongqi Zhao
- Bei Jing Institute of Basic Medical Sciences, Beijing, China
| | - Weiwei Xing
- Bei Jing Institute of Basic Medical Sciences, Beijing, China.
| | - Jin Chen
- Institute of Clinical Laboratory, The 900Th Hospital, Xiamen University, Fuzhou, China.
- Institute of Clinical Medicine, The Second Affiliated Hospital of Hainan Medical University, Haikou, China.
| | - Changguo Chen
- Department of Clinical Laboratory, The Six Medical Center of PLA General Hospital, No. 6 Fucheng Road, Beijing, 100048, China.
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Behera S, Tanuku NRS, Moturi SRK, Loganathan J, Modali S, Tadi SR, Rachuri V. Huge anthropogenic microbial load during southwest monsoon season in coastal waters of Kakinada, Bay of Bengal. MARINE POLLUTION BULLETIN 2023; 192:114977. [PMID: 37167663 DOI: 10.1016/j.marpolbul.2023.114977] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Revised: 04/16/2023] [Accepted: 04/19/2023] [Indexed: 05/13/2023]
Abstract
To examine the influence of anthropogenic activities on the marine ecosystem near the coastal waters of the port city, Kakinada, a study was conducted to investigate the abundance of heterotrophic, indicator and pathogenic bacteria during the spring inter monsoon (SIM) and southwest monsoon (SWM) seasons. A drastic change in the marine bacteria due to the input of allochthonous bacteria during SWM was noticed. An order of magnitude higher abundance of indicators (Escherichia coli and Enterococcus faecalis) and bacterial pathogens (Proteus mirabilis and Pseudomonas aeruginosa) was observed during SWM. In contrast, Chlorophyll-a, heterotrophic bacterial abundance, Aeromonas hydrophila and Klebsiella pneumoniae were higher during SIM. A significant increase in some of the indicator and pathogenic bacterial abundance due to moderate rainfall suggests that the improper drainage system in the city could spread these bacteria, posing a considerable threat to both environment and human health.
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Affiliation(s)
- Swarnaprava Behera
- CSIR-National Institute of Oceanography, Regional Centre, 176, Lawson's Bay Colony, Visakhapatnam 530017, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Naga Radha Srinivas Tanuku
- CSIR-National Institute of Oceanography, Regional Centre, 176, Lawson's Bay Colony, Visakhapatnam 530017, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India.
| | - Sri Rama Krishna Moturi
- CSIR-National Institute of Oceanography, Regional Centre, 176, Lawson's Bay Colony, Visakhapatnam 530017, India
| | - Jagadeesan Loganathan
- CSIR-National Institute of Oceanography, Regional Centre, 176, Lawson's Bay Colony, Visakhapatnam 530017, India
| | - Sravani Modali
- CSIR-National Institute of Oceanography, Regional Centre, 176, Lawson's Bay Colony, Visakhapatnam 530017, India
| | - Satyanarayana Reddy Tadi
- CSIR-National Institute of Oceanography, Regional Centre, 176, Lawson's Bay Colony, Visakhapatnam 530017, India
| | - Vivek Rachuri
- CSIR-National Institute of Oceanography, Regional Centre, 176, Lawson's Bay Colony, Visakhapatnam 530017, India
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Hu YQ, Wang WY, Turmidzi F, Li FX, Fang LF, Zhou ZH, Zhang DF. Rapid and simultaneous detection of viable Vibrio parahaemolyticus, Vibrio alginolyticus, and Vibrio cholerae by PMA-mPCR assay in aquatic products. Lebensm Wiss Technol 2023. [DOI: 10.1016/j.lwt.2023.114663] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/18/2023]
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Ayala AJ, Ogbunugafor CB. When Vibrios Take Flight: A Meta-Analysis of Pathogenic Vibrio Species in Wild and Domestic Birds. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2023; 1404:295-336. [PMID: 36792882 DOI: 10.1007/978-3-031-22997-8_15] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
Abstract
Of the over 100 species in the genus Vibrio, approximately twelve are associated with clinical disease, such as cholera and vibriosis. Crucially, eleven of those twelve, including Vibrio cholerae and Vibrio vulnificus, have been isolated from birds. Since 1965, pathogenic Vibrio species have been consistently isolated from aquatic and ground-foraging bird species, which has implications for public health, as well as the One Health paradigm defined as an ecology-inspired, integrative framework for the study of health and disease, inclusive of environmental, human, and animal health. In this meta-analysis, we identified 76 studies from the primary literature which report on or examine birds as hosts for pathogenic Vibrio species. We found that the burden of disease in birds was most commonly associated with V. cholerae, followed by V. metschnikovii and V. parahaemolyticus. Meta-analysis wide prevalence of our Vibrio pathogens varied from 19% for V. parahaemolyticus to 1% for V. mimicus. Wild and domestic birds were both affected, which may have implications for conservation, as well as agriculturally associated avian species. As pathogenic Vibrios become more abundant throughout the world as a result of warming estuaries and oceans, susceptible avian species should be continually monitored as potential reservoirs for these pathogens.
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Affiliation(s)
- Andrea J Ayala
- Department of Ecology and Evolutionary Biology, Yale University, New Haven, CT, USA
| | - C Brandon Ogbunugafor
- Department of Ecology and Evolutionary Biology, Yale University, New Haven, CT, USA.
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5
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Tian Z, Yang L, Qi X, Zheng Q, Shang D, Cao J. Visual LAMP method for the detection of Vibrio vulnificus in aquatic products and environmental water. BMC Microbiol 2022; 22:256. [PMID: 36271365 PMCID: PMC9585733 DOI: 10.1186/s12866-022-02656-1] [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: 11/24/2021] [Accepted: 08/29/2022] [Indexed: 11/11/2022] Open
Abstract
Background A visual, rapid, simple method was developed based on a loop-mediated isothermal amplification (LAMP) assay to detect Vibrio vulnificus in aquatic products and aquaculture waters. Results Genomic DNA was extracted from Vibrio vulnificus using the boiling method, and optimized primers were used to detect the gyrB gene using a visual LAMP method. The sensitivity of the assay was 10 fg/μL, and the obtained results were stable and reliable. Out of 655 aquatic product samples and 558 aquaculture water samples, the positive rates of Vibrio vulnificus detection were 9.01% and 8.60%, respectively, which are markedly higher than those of the traditional culture identification methods. Conclusion The relatively simple technical requirements, low equipment cost, and rapid detection make the visual LAMP method for the detection of Vibrio vulnificus a convenient choice for field detection in the aquaculture industry.
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Affiliation(s)
- Zhuo Tian
- Liaoning Normal University, Dalian, 116023, China.,Key Laboratory of Biotechnology and Bioresources Utilization of Ministry of Education, Dalian Minzu University, Dalian, 116600, China.,Dalian Customs Technology Center, Dalian, 116001, China
| | - Lili Yang
- Key Laboratory of Biotechnology and Bioresources Utilization of Ministry of Education, Dalian Minzu University, Dalian, 116600, China
| | - Xin Qi
- Dalian Customs Technology Center, Dalian, 116001, China
| | - Qiuyue Zheng
- Key Laboratory of Biotechnology and Bioresources Utilization of Ministry of Education, Dalian Minzu University, Dalian, 116600, China
| | - Dejing Shang
- Liaoning Normal University, Dalian, 116023, China.
| | - Jijuan Cao
- Key Laboratory of Biotechnology and Bioresources Utilization of Ministry of Education, Dalian Minzu University, Dalian, 116600, China.
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Abd Wahid ME, Mohamad M, Mohamed NN, Afiqah-Aleng N. Vibriosis in green mussels. AQUACULTURE PATHOPHYSIOLOGY 2022:515-529. [DOI: 10.1016/b978-0-323-95434-1.00069-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
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Laith AA, Ros-Amira MK, Sheikh HI, Effendy AWM, Najiah M. Histopathological and immunological changes in green mussel, Perna viridis, challenged with Vibrio alginolyticus. FISH & SHELLFISH IMMUNOLOGY 2021; 118:169-179. [PMID: 34487829 DOI: 10.1016/j.fsi.2021.08.032] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Revised: 08/29/2021] [Accepted: 08/31/2021] [Indexed: 06/13/2023]
Abstract
Understanding of pathogenicity and immunity is crucial in producing disease-resistant cultured mollusk varieties. This study aimed to isolate pathogenic Vibrio alginolyticus from naturally infected Perna viridis, and to determine histopathological and immunological changes after challenge test with the same bacteria. Biochemical tests and 16S rDNA identified the pathogen as V. alginolyticus (99%). Antibiotic susceptibility test showed ampicillin resistance of the pathogen. Pathogenicity assay was conducted by immersing P. viridis in 1.5 × 106 CFU mL-1V. alginolyticus for 60 min and observed for 5 days. Clinical signs, histopathological and immunological alterations were observed and monitored. Infected groups showed 60% mortality and decreased immunity factors, including total hemocyte count and lysozymes activity. Histopathological examination revealed pathological lesions in the hepatopancreas at 24 h post-challenge and hemocyte proliferation as part of a severe inflammatory reaction. Karyomegaly in the hepatopancreas tissue, concomitant with necrosis demolition of tubules cells, was also observed. V. alginolyticus was determined to be pathogenic to P. viridis, causing mortality as a result of multiple organ lesions and dysfunction in digestive gland and immune organs. This study demonstrated the role of histopathological and immunological parameters as potential biomarkers in assessing vibriosis caused by Vibrio species in green mussel, P. viridis.
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Affiliation(s)
- A A Laith
- Faculty of Fisheries and Food Science, Universiti Malaysia Terengganu, 21030, Kuala Terengganu, Malaysia.
| | - M K Ros-Amira
- Faculty of Fisheries and Food Science, Universiti Malaysia Terengganu, 21030, Kuala Terengganu, Malaysia
| | - H I Sheikh
- Faculty of Fisheries and Food Science, Universiti Malaysia Terengganu, 21030, Kuala Terengganu, Malaysia
| | - A W M Effendy
- Faculty of Fisheries and Food Science, Universiti Malaysia Terengganu, 21030, Kuala Terengganu, Malaysia
| | - M Najiah
- Faculty of Fisheries and Food Science, Universiti Malaysia Terengganu, 21030, Kuala Terengganu, Malaysia
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Zhou W, Li Y, Li Z, Ma B, Jiang X, Hu C, Ai Y, Luo P. Genomic Changes and Genetic Divergence of Vibrio alginolyticus Under Phage Infection Stress Revealed by Whole-Genome Sequencing and Resequencing. Front Microbiol 2021; 12:710262. [PMID: 34671325 PMCID: PMC8521149 DOI: 10.3389/fmicb.2021.710262] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2021] [Accepted: 09/14/2021] [Indexed: 11/13/2022] Open
Abstract
Bacteriophages (phages) and their bacterial hosts were the most abundant and genetically highly diverse organisms on the earth. In this study, a series of phage-resistant mutant (PRM) strains derived from Vibrio alginolyticus were isolated and Infrequent-restriction-site PCR (IRS-PCR) was used to investigate the genetic diversity of the PRM strains. Phenotypic variations of eight PRM strains were analyzed using profiles of utilizing carbon sources and chemical sensitivity. Genetic variations of eight PRM strains and coevolved V. alginolyticus populations with phages were analyzed by whole-genome sequencing and resequencing, respectively. The results indicated that eight genetically discrepant PRM stains exhibited abundant and abundant phenotypic variations. Eight PRM strains and coevolved V. alginolyticus populations (VE1, VE2, and VE3) contained numerous single nucleotide variations (SNVs) and insertions/indels (InDels) and exhibited obvious genetic divergence. Most of the SNVs and InDels in coding genes were related to the synthesis of flagellar, extracellular polysaccharide (EPS), which often served as the receptors of phage invasion. The PRM strains and the coevolved cell populations also contained frequent mutations in tRNA and rRNA genes. Two out of three coevolved populations (VE1 and VE2) contained a large mutation segment severely deconstructing gene nrdA, which was predictably responsible for the booming of mutation rate in the genome. In summary, numerous mutations and genetic divergence were detected in the genomes of V. alginolyticus PRM strains and in coevolved cell populations of V. alginolyticus under phage infection stress. The phage infection stress may provide an important force driving genomic evolution of V. alginolyticus.
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Affiliation(s)
- Wenjie Zhou
- College of Animal Science, Jilin University, Changchun, China
- CAS Key Laboratory of Tropical Marine Bio-Resources and Ecology (LMB), Guangdong Provincial Key Laboratory of Applied Marine Biology (LAMB), South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China
| | - Yingying Li
- CAS Key Laboratory of Tropical Marine Bio-Resources and Ecology (LMB), Guangdong Provincial Key Laboratory of Applied Marine Biology (LAMB), South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, China
- Geological Survey Institute of Guangzhou, Guangzhou, China
| | - Zhuobo Li
- CAS Key Laboratory of Tropical Marine Bio-Resources and Ecology (LMB), Guangdong Provincial Key Laboratory of Applied Marine Biology (LAMB), South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Bo Ma
- CAS Key Laboratory of Tropical Marine Bio-Resources and Ecology (LMB), Guangdong Provincial Key Laboratory of Applied Marine Biology (LAMB), South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Xiao Jiang
- CAS Key Laboratory of Tropical Marine Bio-Resources and Ecology (LMB), Guangdong Provincial Key Laboratory of Applied Marine Biology (LAMB), South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, China
| | - Chaoqun Hu
- CAS Key Laboratory of Tropical Marine Bio-Resources and Ecology (LMB), Guangdong Provincial Key Laboratory of Applied Marine Biology (LAMB), South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, China
| | - Yongxing Ai
- College of Animal Science, Jilin University, Changchun, China
| | - Peng Luo
- CAS Key Laboratory of Tropical Marine Bio-Resources and Ecology (LMB), Guangdong Provincial Key Laboratory of Applied Marine Biology (LAMB), South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, China
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Lytou AE, Schoina E, Liu Y, Michalek K, Stanley MS, Panagou EZ, Nychas GJE. Quality and Safety Assessment of Edible Seaweeds Alaria esculenta and Saccharina latissima Cultivated in Scotland. Foods 2021; 10:foods10092210. [PMID: 34574321 PMCID: PMC8472205 DOI: 10.3390/foods10092210] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Revised: 09/13/2021] [Accepted: 09/15/2021] [Indexed: 12/14/2022] Open
Abstract
Within Europe over the last 10 years, there has been an increase in seaweeds cultivated for human consumption. For food safety reasons, it is important to assess the microbiological and nutritional quality of the biomass. The fresh and dried edible seaweeds Alaria esculenta and Saccharina latissima were assessed over two consecutive years for the presence of microorganisms. Seaweed samples supplied from Scotland were stored under isothermal conditions for specific time intervals depending on the sample’s condition (fresh, dried or rehydrated). During storage, microbiological analyses were performed for the enumeration of Total Viable Counts (TVC), Pseudomonas spp., Enterobacteriaceae and Bacillus spp., as well as yeasts and molds. Additionally, bacterial colonies from the Marine Agar growth medium were isolated and subjected to PCR-RAPD analysis for characterization of the bacterial diversity of seaweeds. Bacterial isolates with different fingerprint patterns were further subjected to sequencing (16S rDNA, V1–V4 region). The presence of human pathogenic bacteria was also investigated. Results showed that the initial population of TVC was differentiated depending on the year of seaweed harvest, being closer to the enumeration limit (1.0 log CFU/g) in fresh samples from 2020 and higher in samples from 2019 (6.7 and 3.9 log CFU/g in A. esculenta and S. latissima, respectively). DNA-based analysis revealed the presence of Psychrobacter, Cobetia and Pseudomonas species in A. esculenta, while Psychrobacter and Micrococcus species were present in S. latissima.
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Affiliation(s)
- Anastasia E. Lytou
- Laboratory of Microbiology and Biotechnology of Foods, Department of Food Science and Human Nutrition, School of Food and Nutritional Sciences, Agricultural University of Athens, 11855 Athens, Greece; (A.E.L.); (E.S.); (E.Z.P.)
| | - Eirini Schoina
- Laboratory of Microbiology and Biotechnology of Foods, Department of Food Science and Human Nutrition, School of Food and Nutritional Sciences, Agricultural University of Athens, 11855 Athens, Greece; (A.E.L.); (E.S.); (E.Z.P.)
| | - Yunge Liu
- Department of Food Science and Engineering, Shandong Agricultural University, Tai’an 271018, China;
| | - Kati Michalek
- Scottish Association for Marine Science (SAMS), Oban PA37 1QA, UK; (K.M.); (M.S.S.)
| | - Michele S. Stanley
- Scottish Association for Marine Science (SAMS), Oban PA37 1QA, UK; (K.M.); (M.S.S.)
| | - Efstathios Z. Panagou
- Laboratory of Microbiology and Biotechnology of Foods, Department of Food Science and Human Nutrition, School of Food and Nutritional Sciences, Agricultural University of Athens, 11855 Athens, Greece; (A.E.L.); (E.S.); (E.Z.P.)
| | - George-John E. Nychas
- Laboratory of Microbiology and Biotechnology of Foods, Department of Food Science and Human Nutrition, School of Food and Nutritional Sciences, Agricultural University of Athens, 11855 Athens, Greece; (A.E.L.); (E.S.); (E.Z.P.)
- Correspondence: ; Tel.: +30-210-529-4938
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10
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Vibrio cholerae Infection Induces Strain-Specific Modulation of the Zebrafish Intestinal Microbiome. Infect Immun 2021; 89:e0015721. [PMID: 34061623 DOI: 10.1128/iai.00157-21] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Zebrafish (Danio rerio) is an attractive model organism to use for an array of scientific studies, including host-microbe interactions. Zebrafish contain a core (i.e., consistently detected) intestinal microbiome consisting primarily of Proteobacteria. Furthermore, this core intestinal microbiome is plastic and can be significantly altered due to external factors. Zebrafish are particularly useful for the study of aquatic microbes that can colonize vertebrate hosts, including Vibrio cholerae. As an intestinal pathogen, V. cholerae must colonize the intestine of an exposed host for pathogenicity to occur. Members of the resident intestinal microbial community likely must be reduced or eliminated by V. cholerae for colonization, and subsequent disease, to occur. Many studies have explored a variety of aspects of the pathogenic effects of V. cholerae on zebrafish and other model organisms but few have researched how a V. cholerae infection changes the resident intestinal microbiome. In this study, 16S rRNA gene sequencing was used to examine how five genetically diverse V. cholerae strains alter the intestinal microbiome following an infection. We found that V. cholerae colonization induced significant changes in the zebrafish intestinal microbiome. Notably, changes in the microbial profile were significantly different from each other, based on the particular strain of V. cholerae used to infect zebrafish hosts. We conclude that V. cholerae significantly modulates the zebrafish intestinal microbiota to enable colonization and that specific microbes that are targeted depend on the V. cholerae genotype.
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Håkonsholm F, Lunestad BT, Aguirre Sánchez JR, Martinez‐Urtaza J, Marathe NP, Svanevik CS. Vibrios from the Norwegian marine environment: Characterization of associated antibiotic resistance and virulence genes. Microbiologyopen 2020; 9:e1093. [PMID: 32558371 PMCID: PMC7520990 DOI: 10.1002/mbo3.1093] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2020] [Revised: 05/20/2020] [Accepted: 05/27/2020] [Indexed: 12/19/2022] Open
Abstract
A total of 116 Vibrio isolates comprising V. alginolyticus (n = 53), V. metschnikovii (n = 38), V. anguillarum (n = 21), V. antiquarius (n = 2), and V. fujianensis (n = 2) were obtained from seawater, fish, or bivalve molluscs from temperate Oceanic and Polar Oceanic area around Norway. Antibiotic sensitivity testing revealed resistance or reduced susceptibility to ampicillin (74%), oxolinic acid (33%), imipenem (21%), aztreonam (19%), and tobramycin (17%). Whole-genome sequence analysis of eighteen drug-resistant isolates revealed the presence of genes like β-lactamases, chloramphenicol-acetyltransferases, and genes conferring tetracycline and quinolone resistance. The strains also carried virulence genes like hlyA, tlh, rtxA to D and aceA, E and F. The genes for cholerae toxin (ctx), thermostable direct hemolysin (tdh), or zonula occludens toxin (zot) were not detected in any of the isolates. The present study shows low prevalence of multidrug resistance and absence of virulence genes of high global concern among environmental vibrios in Norway. However, in the light of climate change, and projected rising sea surface temperatures, even in the cold temperate areas, there is a need for frequent monitoring of resistance and virulence in vibrios to be prepared for future public health challenges.
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Affiliation(s)
| | | | | | - Jaime Martinez‐Urtaza
- Department of Genetics and MicrobiologyUniversitat Autònoma de Barcelona (UAB)BarcelonaSpain
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Rapid identification and detection of Vibrio parahaemolyticus via different types of modus operandi with LAMP method in vivo. ANN MICROBIOL 2020. [DOI: 10.1186/s13213-020-01585-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Abstract
Purpose
Vibrio parahaemolyticus, an easy-ignored food-borne pathogen, can cause bacterial outbreaks and human disease during early-stage infection. In this study, we aimed to evaluate the detection efficiency of loop-mediated isothermal amplification (LAMP) as an emerging technique to directly detect V. parahaemolyticus infection in mammalian hosts and assess its potential in clinical applications.
Methods
A LAMP assay was used for rapid identification of V. parahaemolyticus in a variety of mouse models in which animals were infected via the digestive tract, wounds, or through general infection, and the results were compared with routine analytical methods.
Results
Our results confirmed that the LAMP assay was capable of detecting V. parahaemolyticus in different mouse organs independent of the source of bacteria, although its sensitivity depended on the route of infection and the organ affected. Foodborne-derived V. parahaemolyticus was the most sensitive route, with the small intestine being the most sensitive organ. The LAMP assay indicated that V. parahaemolyticus that spread through the blood stream had the most serious consequences during early-stage infection. Positive LAMP results were identified in all blood samples from i.v. injected mice. Furthermore, the LAMP method could directly detect trace quantities of V. parahaemolyticus in fresh peripheral blood while conventional methods failed to do so, thereby shortening the time-to-result from days to minutes.
Conclusions
In this study, we demonstrated that the LAMP assay was effective in speeding up the detection of V. parahaemolyticus. Instead of being a secondary method to assist in the clinic, the LAMP assay has potential for use as the primary technique for rapid detection of V. parahaemolyticus in the future.
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13
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Gong QY, Yang MJ, Yang LF, Chen ZG, Jiang M, Peng B. Metabolic modulation of redox state confounds fish survival against Vibrio alginolyticus infection. Microb Biotechnol 2020; 13:796-812. [PMID: 32212318 PMCID: PMC7664012 DOI: 10.1111/1751-7915.13553] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Revised: 01/18/2020] [Accepted: 02/23/2020] [Indexed: 12/19/2022] Open
Abstract
Vibrio alginolyticus threatens both humans and marine animals, but hosts respond to V. alginolyticus infection is not fully understood. Here, functional metabolomics was adopted to investigate the metabolic differences between the dying and surviving zebrafish upon V. alginolyticus infection. Tryptophan was identified as the most crucial metabolite, whose abundance was decreased in the dying group but increased in the survival group as compared to control group without infection. Concurrently, the dying zebrafish displayed excessive immune response and produced higher level of reactive oxygen species (ROS). Interestingly, exogenous tryptophan reverted dying rate through metabolome re‐programming, thereby enhancing the survival from V. alginolyticus infection. It is preceded by the following mechanism: tryptophan fluxed into the glycolysis and tricarboxylic acid cycle (TCA cycle), promoted adenosine triphosphate (ATP) production and further increased the generation of NADPH. Meanwhile, tryptophan decreased NADPH oxidation. These together ameliorate ROS, key molecules in excessive immune response. This is further supported by the event that the inhibition of pyruvate metabolism and TCA cycle by inhibitors decreased D. reiro survival. Thus, our data indicate that tryptophan is a key metabolite for the host to fight against V. alginolyticus infection, representing an alternative strategy to treat bacterial infection in an antibiotic‐independent way.
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Affiliation(s)
- Qi-Yang Gong
- State Key Laboratory of Bio-Control, Guangdong Key Laboratory of Pharmaceutical Functional Genes School of Life Sciences, Center for Proteomics and Metabolomics, Sun Yat-sen University, Guangzhou, 510006, China.,Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266071, China
| | - Man-Jun Yang
- State Key Laboratory of Bio-Control, Guangdong Key Laboratory of Pharmaceutical Functional Genes School of Life Sciences, Center for Proteomics and Metabolomics, Sun Yat-sen University, Guangzhou, 510006, China
| | - Li-Fen Yang
- Department of Pediatrics, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, 510630, China
| | - Zhuang-Gui Chen
- Department of Pediatrics, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, 510630, China
| | - Ming Jiang
- State Key Laboratory of Bio-Control, Guangdong Key Laboratory of Pharmaceutical Functional Genes School of Life Sciences, Center for Proteomics and Metabolomics, Sun Yat-sen University, Guangzhou, 510006, China.,Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266071, China
| | - Bo Peng
- State Key Laboratory of Bio-Control, Guangdong Key Laboratory of Pharmaceutical Functional Genes School of Life Sciences, Center for Proteomics and Metabolomics, Sun Yat-sen University, Guangzhou, 510006, China.,Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266071, China.,Department of Pediatrics, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, 510630, China.,Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, 519000, China
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14
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Serratore P, Zavatta E, Bignami G, Lorito L. Preliminary investigation on the microbiological quality of edible marine gastropods of the Adriatic Sea, Italy. Ital J Food Saf 2019; 8:7691. [PMID: 31312618 PMCID: PMC6600847 DOI: 10.4081/ijfs.2019.7691] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2018] [Accepted: 02/13/2019] [Indexed: 02/08/2023] Open
Abstract
According to the European Legislation, marine gastropods placed unprocessed on the market must comply with the same requirements established for live bivalve molluscs but, being considered not filterfeeding and unable to concentrate fecal contaminants, they may be harvested outside the classified areas. Despite this statement, little scientific information is available on the microbiological quality of these animals. The aim of the present study was to investigate 28 batches of edible snails of the Adriatic Sea, namely Nassarius mutabilis and Bolinus brandaris, with respect to i) smell and viability, by a method here reported; ii) the bacterial component of the whole body referred to E. coli, Vibrio spp., V. parahaemolyticus, V. vulnificus, V. cholerae and V. alginolyticus. A total of 21 batches of N. mutabilis and 7 batches of B. brandaris were analyzed. Batches of both species retrieved from the primary production were all largely composed of viable animals, had saltwater/neutral smell, and showed mean value of Vibrio spp. of 5,34 and 5,79 log10 UFC g-1 in N. mutabilis and B. brandaris respectively. 47% of the batches of N. mutabilis retrieved from the market, were largely composed of dead animals, had acrid/nasty smell, and showed mean value of Vibrio spp. of 6,53 log10 UFC g-1. E. coli, V. vulnificus and V. cholerae were never detected, but all samples were positive for V. alginolyticus. One sample of B. brandaris was positive for V. parahaemolyticus genotyped by PCR at the specie level (ToxR+) and positive for the thermostable direct hemolysin gene (tdh+).
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Affiliation(s)
| | - Emanuele Zavatta
- Department of Veterinary Medical Science, University of Bologna, Italy
| | - Giorgia Bignami
- Department of Veterinary Medical Science, University of Bologna, Italy
| | - Luna Lorito
- Department of Veterinary Medical Science, University of Bologna, Italy
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15
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Siddique MP, Jang WJ, Lee JM, Hasan MT, Kim CH, Kong IS. Detection of Vibrio anguillarum and Vibrio alginolyticus by Singleplex and Duplex Loop-Mediated Isothermal Amplification (LAMP) Assays Targeted to groEL and fklB Genes. Int Microbiol 2019; 22:501-509. [PMID: 31098824 DOI: 10.1007/s10123-019-00079-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Revised: 04/01/2019] [Accepted: 04/07/2019] [Indexed: 12/15/2022]
Abstract
Singleplex and duplex loop-mediated isothermal amplification (LAMP) assays were developed for detecting Vibrio anguillarum, a major bacterial pathogen of fish, and Vibrio alginolyticus, a pathogen of fish and humans, separately and simultaneously from contaminated seawater by targeting the groEL gene of V. anguillarum, which encodes a molecular chaperone protein, and the fklB gene of V. alginolyticus, which encodes a 22 kilodalton (kDa) peptidyl prolyl isomerase. The optimal reaction conditions to produce consistent results were 65 °C for 30 min, 63 °C for 30 min, and 63 °C for 40 min for the groEL (singleplex for V. anguillarum), fklB (singleplex for V. alginolyticus), and groEL + flkB (duplex) LAMP assays, respectively, analyzed via visual detection methods (use of calcein, and SYBR Green I) and agarose gel electrophoresis. The assays were found to be species-specific, as closely related Vibrio spp. were not detected. The limits of detection (LoDs) of the LAMP assays for DNA template from pure culture and artificially contaminated seawater were 10 and 14 fg (groEL assay; for V. anguillarum), 12.5 and 17 fg (fklB assay; for V. alginolyticus), and 50 and 70 fg (duplex assay) per reaction, respectively, which were much better than the LoDs of conventional polymerase chain reaction (PCR). Singleplex and duplex LAMP assays were found to be rapid, species-specific, and sensitive for the detection of V. anguillarum and V. alginolyticus and are applicable to laboratory and field diagnostics.
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Affiliation(s)
- Mahbubul Pratik Siddique
- Department of Biotechnology, Pukyong National University, Busan, 48513, Republic of Korea.,Department of Microbiology and Hygiene, Bangladesh Agricultural University, Mymensingh, Bangladesh
| | - Won Je Jang
- Department of Biotechnology, Pukyong National University, Busan, 48513, Republic of Korea
| | - Jong Min Lee
- Industrial Bio-materials Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, 34141, Republic of Korea
| | - Md Tawheed Hasan
- Department of Biotechnology, Pukyong National University, Busan, 48513, Republic of Korea.,Department of Aquaculture, Sylhet Agricultural University, Sylhet, 3100, Bangladesh
| | - Chang-Hoon Kim
- Department of Marine Bio-materials & Aquaculture, Pukyong National University, Busan, 48513, Republic of Korea
| | - In-Soo Kong
- Department of Biotechnology, Pukyong National University, Busan, 48513, Republic of Korea.
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16
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Giarratana F, Ziino G, D'Andrea V, Panebianco A, Giuffrida A. Quality assessment of Zeus faber (Peter's fish) ovaries regularly commercialized for human consumption. Ital J Food Saf 2018; 7:6997. [PMID: 29732333 PMCID: PMC5913707 DOI: 10.4081/ijfs.2018.6997] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2017] [Revised: 11/06/2017] [Accepted: 11/07/2017] [Indexed: 12/14/2022] Open
Abstract
In the last few years, the consumption of fish eggs has increased rapidly, finding widespread use also in mass catering. This increase has involved also those of the Peter's fish (Zeus faber). Females of this species, by their reproductive characteristics, have highly developed gonads in different periods of the year, making the raw material easy to find. The aim of the present study was to perform a quality assessment of Zeus faber ovaries regularly commercialized for human consumption. A total number of 34 samples, divided in fresh (11) and frozen (23), were processed for microbiological characterization, parasitological and histological evaluations. Fresh and frozen samples have significant (P<0.01) differences in total bacterial charge, with values of 4.75±0.5 Log CFU/g and 3.65±0.7 Log CFU/g respectively. The mean value of Enterobacteriaceae was 2.58±0.7 Log CFU/g in fresh products, while 52.17% (12) of frozen samples reported loads of <1 Log CFU/g. No Salmonella spp. and Listeria monocytogenes were found. Aeromonas spp. was detected in two frozen sample (with loads of 2.2 and <1 Log CFU/g) and in 5 fresh ovaries with value ranged from 1.70 to 3.48 Log CFU/g. Vibrio spp. was found in 4 (36.36%) and 3 (13.04%) of fresh and frozen samples respectively, with loads always <1 Log CFU/g. All 31 Vibrio strains isolated, were identified as Vibrio alginolyticus, and 61.29% (19) of them was positive for the ToxRS factor and 6.45% (2) for ToxR. The 47.06% (16) of total samples showed infestations by larvae of Anisakis Type 1 in the serous and inside the ovary. In this last case, histologically it was found to be free larvae. This study attested satisfactory hygiene conditions for Zeus faber ovaries currently marked for human consumption. The presence of potentially pathogenic strains of V. alginolyticus and Aeromonas spp., but above all the frequent infestation by Anisakis larvae, represent a potentially hazard for the consumer.
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Affiliation(s)
| | - Graziella Ziino
- Department of Veterinary Science, University of Messina, Italy
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17
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Xin L, Zhang L, Meng Z, Lin K, Zhang S, Han X, Yi H, Cui Y. Development of a novel loop-mediated isothermal amplification assay for the detection of lipolytic Pseudomonas fluorescens in raw cow milk from north China. J Dairy Sci 2017; 100:7802-7811. [PMID: 28780114 DOI: 10.3168/jds.2017-12740] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2017] [Accepted: 06/17/2017] [Indexed: 01/23/2023]
Abstract
Lipases secreted by psychrotrophic bacteria are known to be heat resistant and can remain active even after the thermal processing of milk products. Such enzymes are able to destabilize the quality of milk products by causing a rancid flavor. Rapid detection of a small amount of heat-resistant lipase-producing psychrotrophic bacteria is crucial for reducing their adverse effects on milk quality. In this study, we established and optimized a novel loop-mediated isothermal amplification (LAMP) assay for the detection of Pseudomonas fluorescens in raw cow milk, as the most frequently reported heat-resistant lipase-producing bacterial species. Pseudomonas fluorescens-specific DNA primers for LAMP were designed based on the lipase gene sequence. Reaction conditions of the LAMP assay were tested and optimized. The detection limit of the optimized LAMP assay was found to be lower than that of a conventional PCR-based method. In pure culture, the detection limit of the LAMP assay was found to be 4.8 × 101 cfu/reaction of the template DNA, whereas the detection limit of the PCR method was 4.8 × 102 cfu/reaction. Evaluation of the performance of the method in P. fluorescens-contaminated pasteurized cow milk revealed a detection limit of 7.4 × 101 cfu/reaction, which was 102 lower than that of the PCR-based method. If further developed, the LAMP assay could offer a favorable on-farm alternative to existing technologies for the detection of psychotrophic bacterial contamination of milk, enabling improved quality control of milk and milk products.
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Affiliation(s)
- Liang Xin
- Department of Food Science and Engineering, Harbin Institute of Technology, Harbin 150090, China
| | - Lanwei Zhang
- Department of Food Science and Engineering, Harbin Institute of Technology, Harbin 150090, China; College of Food Science and Engineering, Ocean University of China, Qingdao 266003, China.
| | - Zhaoxu Meng
- Department of Food Science and Engineering, Harbin Institute of Technology, Harbin 150090, China
| | - Kai Lin
- Department of Food Science and Engineering, Harbin Institute of Technology, Harbin 150090, China
| | - Shuang Zhang
- Food College, Northeast Agricultural University, Harbin 150030, China
| | - Xue Han
- Department of Food Science and Engineering, Harbin Institute of Technology, Harbin 150090, China
| | - HuaXi Yi
- College of Food Science and Engineering, Ocean University of China, Qingdao 266003, China.
| | - Yanhua Cui
- Department of Food Science and Engineering, Harbin Institute of Technology, Harbin 150090, China
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