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Yan Y, Lu H, Liang X, Xu T, Yan S, Yu Y, Wang Y. The virulence plasmid associated with AHPND in shrimp appears to have originated from Vibrio owensii through a process of homologous recombination of parental plasmids and the transposable insertion of two large fragments. J Invertebr Pathol 2024; 206:108173. [PMID: 39121985 DOI: 10.1016/j.jip.2024.108173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2024] [Revised: 08/02/2024] [Accepted: 08/04/2024] [Indexed: 08/12/2024]
Abstract
Acute hepatopancreatic necrosis disease (AHPND) is a highly contagious and lethal disease of shrimp caused by Vibrio strains carrying the virulence plasmid (pAHPND) containing the pirAB virulence genes. Through analysis of plasmid sequence similarity, clustering, and phylogeny, a horizontal transfer element similar to IS91 was discovered within the pAHPND plasmid. Additionally, two distinct clades of plasmids related to pAHPND (designated as pAHPND-r1 and pAHPND-r2) were identified, which may serve as potential parental plasmids for pAHPND. The available evidence, including the difference in G+C content between the plasmid and its host, codon usage preference, and plasmid recombination event prediction, suggests that the formation of the pAHPND plasmid in the Vibrio owensii strain was likely due to the synergistic effect of the recombinase RecA and the associated proteins RecBCD on the pAHPND-r1 and pAHPND-r2, resulting in the recombination and formation of the precursor plasmid for pAHPND (pre-pAHPND). The emergence of pAHPND was found to be a result of successive insertions of the horizontal transfer elements of pirAB-Tn903 and IS91-like segment, which led to the deletion of one third of the pre-pAHPND. This plasmid was then able to spread horizontally to other Vibrio strains, contributing to the epidemics of AHPND. These findings shed light on previously unknown mechanisms involved in the emergence of pAHPND and improve our understanding of the disease's spread.
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Affiliation(s)
- Yesheng Yan
- College of Food Science and Technology, Shanghai Ocean University, Shanghai, China
| | - Haojie Lu
- College of Food Science and Technology, Shanghai Ocean University, Shanghai, China
| | - Xiaosha Liang
- College of Food Science and Technology, Shanghai Ocean University, Shanghai, China
| | - Tianqi Xu
- College of Food Science and Technology, Shanghai Ocean University, Shanghai, China
| | - Shuling Yan
- Entwicklungsgenetik und Zellbiologie der Tiere, Philipps-Universität Marburg, Marburg, Germany
| | - Yongxin Yu
- College of Food Science and Technology, Shanghai Ocean University, Shanghai, China
| | - Yongjie Wang
- College of Food Science and Technology, Shanghai Ocean University, Shanghai, China; Laboratory for Marine Biology and Biotechnology, Qingdao Marine Science and Technology Center, Qingdao, China.
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2
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Sun R, Chen J, Wang Y, Zhang Z, Li Y, Li F, Ma C, Han Q, Shi Y. Rapid, specific and sensitive detection of Vibrio parahaemolyticus in seafood by accelerated strand exchange amplification. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2023; 15:655-662. [PMID: 36655424 DOI: 10.1039/d2ay01889f] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Vibrio parahaemolyticus infectious diseases caused by seafood contamination may be life-threatening to people with weak immunity. The detection of the Vibrio parahaemolyticus pathogen in aquatic foods is critical for reducing the outbreak of human Vibrio parahaemolyticus-associated diseases. In this study, a highly sensitive, specific, and time-saving real-time narrow thermal-cycling amplification detection method was developed based on accelerated strand exchange amplification (ASEA). It can detect cultured Vibrio parahaemolyticus at concentrations as low as 25 CFU mL-1. In addition, for artificially spiked scallop meat, the detection limit was 1.8 × 103 CFU g-1 without pre-culture and 18 CFU g-1 of initial inoculum after 3 h enrichment. The whole assay, starting from DNA extraction, can be completed within 20 min. The ASEA detection method established in this study is an effective tool for the rapid detection of Vibrio parahaemolyticus strains in a large number of seafood samples.
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Affiliation(s)
- Ritong Sun
- Shandong Provincial Key Laboratory of Biochemical Engineering, Qingdao Nucleic Acid Rapid Detection Engineering Research Center, College of Marine Science and Biological Engineering, Qingdao University of Science and Technology, Qingdao, 266042, PR China.
| | - Jiao Chen
- Shandong Provincial Key Laboratory of Biochemical Engineering, Qingdao Nucleic Acid Rapid Detection Engineering Research Center, College of Marine Science and Biological Engineering, Qingdao University of Science and Technology, Qingdao, 266042, PR China.
| | - Yingeng Wang
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, 266071, PR China
| | - Zheng Zhang
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, 266071, PR China
| | - Yong Li
- Shandong Provincial Key Laboratory of Biochemical Engineering, Qingdao Nucleic Acid Rapid Detection Engineering Research Center, College of Marine Science and Biological Engineering, Qingdao University of Science and Technology, Qingdao, 266042, PR China.
| | - Fengmei Li
- Shandong Provincial Key Laboratory of Biochemical Engineering, Qingdao Nucleic Acid Rapid Detection Engineering Research Center, College of Marine Science and Biological Engineering, Qingdao University of Science and Technology, Qingdao, 266042, PR China.
| | - Cuiping Ma
- Shandong Provincial Key Laboratory of Biochemical Engineering, Qingdao Nucleic Acid Rapid Detection Engineering Research Center, College of Marine Science and Biological Engineering, Qingdao University of Science and Technology, Qingdao, 266042, PR China.
| | - Qingxia Han
- Bin Zhou Polytechnic, Qingdao, 256600, PR China
| | - Yanjing Shi
- Shandong Provincial Key Laboratory of Biochemical Engineering, Qingdao Nucleic Acid Rapid Detection Engineering Research Center, College of Marine Science and Biological Engineering, Qingdao University of Science and Technology, Qingdao, 266042, PR China.
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3
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Wang R, Xiao J, Wang Q, Zhao W, Liu X, Liu Y, Fu S. Genomic analysis of a new type VI secretion system in Vibrio parahaemolyticus and its implications for environmental adaptation in shrimp ponds. Can J Microbiol 2023; 69:53-61. [PMID: 36343341 DOI: 10.1139/cjm-2022-0096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The type VI secretion system (T6SS) in Vibrio spp. is often used to kill heteroclonal neighbors by direct injection of toxic effectors, but its strategies in aquacultural environments receive limited attention. In this study, we conducted genomic analysis for a T6SS-harboring plasmid in V. parahaemolyticus strain VP157. Coculture assays were further conducted to verify its antibacterial function. The results showed that strain VP157 harbored a 132-kb plasmid, pVP157-1, which consists of two fragments: an 87.8-kb fragment identical to plasmid pTJ114-1 and a 44.2-kb T6SS gene cluster with only 4% DNA identity to T6SS1 in the V. parahaemolyticus reference genome. Gene-by-gene analysis of six genes representing core T6SS components suggested that each gene has distinct evolutionary origins. In vitro experimental evolution revealed that pVP157-1 can excise from the VP157 genome with an excision rate of 4%. A coculture assay suggested that strain VP157 had significantly higher antibacterial activity against Bacillus pumilus and V. cholerae than the strain without pVP157-1(VP157∆T6SS). In contrast, a rapid decline was observed for the proportion of VP157∆ T6SS in a mock microbial community, which decreased from 10.7% to 2.1% in 5 days. The results highlighted that the acquisition of T6SS fostered the fitness of V . parahaemolyticus in a complex environment.
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Affiliation(s)
- Rui Wang
- College of Marine Science and Environment, Dalian Ocean University, Dalian 116023, China.,Key Laboratory of Environment Controlled Aquaculture, Dalian Ocean University, Ministry of Education, Dalian 116023, China
| | - Jinzhou Xiao
- Shanghai Engineering Research Center of Hadal Science and Technology, College of Marine Sciences, Shanghai Ocean University, Shanghai, China
| | - Qingyao Wang
- Key Laboratory of Environment Controlled Aquaculture, Dalian Ocean University, Ministry of Education, Dalian 116023, China
| | - Wenyu Zhao
- College of Marine Science and Environment, Dalian Ocean University, Dalian 116023, China
| | - Xinyue Liu
- College of Marine Science and Environment, Dalian Ocean University, Dalian 116023, China
| | - Ying Liu
- Key Laboratory of Environment Controlled Aquaculture, Dalian Ocean University, Ministry of Education, Dalian 116023, China
| | - Songzhe Fu
- College of Marine Science and Environment, Dalian Ocean University, Dalian 116023, China.,Key Laboratory of Resource Biology and Biotechnology in Western China, Northwest University, Ministry of Education, Xi'an 710069, China
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4
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Prithvisagar KS, Krishna Kumar B, Kodama T, Rai P, Iida T, Karunasagar I, Karunasagar I. Whole genome analysis unveils genetic diversity and potential virulence determinants in Vibrio parahaemolyticus associated with disease outbreak among cultured Litopenaeus vannamei (Pacific white shrimp) in India. Virulence 2021; 12:1936-1949. [PMID: 34415829 PMCID: PMC8381830 DOI: 10.1080/21505594.2021.1947448] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Vibrio parahaemolyticus has caused widespread mortality in Indian shrimp aquaculture in recent years. However, there are insufficient genome data for the isolates from Indian shrimp vibriosis to analyze genetic diversity and track the acquisition of genetic features that could be involved in virulence and fitness. In this study, we have performed genome analysis of V. parahaemolyticus isolated from moribund shrimps collected from shrimp farms along coastal Karnataka, India, for better understanding of their diversity and virulence. Five newly sequenced genomes of V. parahaemolyticus along with 40 genomes retrieved from NCBI were subjected to comparative genome analysis. The sequenced genomes had an overall genome size of 5.2 Mb. MLST analysis and core genome phylogenomic analysis revealed considerable genetic diversity among the isolates obtained from the moribund shrimps. Interestingly, none of the V. parahaemolyticus isolates possessed the classical features (PirAB) of the strains associated with Acute Hepatopancreatic Necrosis Disease (AHPND). This study also revealed the presence of multiple virulence attributes, including ZOT, ACE and RTX toxins, secretion systems, and mobile genetic elements. The findings of this study provide insights into the possible transition of an environmental V. parahaemolyticus to emerge as pathogens of aquaculture species by increasing its virulence and host adaptation. Future studies focusing on continuous genomic surveillance of V. parahaemolyticus are required to study the evolution and transmission of new variants in shrimp aquaculture, as well as to design and implement biosecurity programs to prevent disease outbreaks.
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Affiliation(s)
- Kattapuni Suresh Prithvisagar
- Nitte (Deemed to Be University), Division of Infectious Diseases, Nitte University Centre for Science Education and Research, Deralakatte, Mangaluru-Karnataka, India
| | - Ballamoole Krishna Kumar
- Nitte (Deemed to Be University), Division of Infectious Diseases, Nitte University Centre for Science Education and Research, Deralakatte, Mangaluru-Karnataka, India
| | - Toshio Kodama
- Department of Bacterial Infections, Research Institute for Microbial Diseases, Osaka University, Osaka, Japan.,Department of Bacteriology, Institute of Tropical Medicine, Nagasaki University, Nagasaki Japan
| | - Praveen Rai
- Nitte (Deemed to Be University), Division of Infectious Diseases, Nitte University Centre for Science Education and Research, Deralakatte, Mangaluru-Karnataka, India
| | - Tetsuya Iida
- Department of Bacterial Infections, Research Institute for Microbial Diseases, Osaka University, Osaka, Japan
| | - Iddya Karunasagar
- Nitte (Deemed to Be University), Division of Infectious Diseases, Nitte University Centre for Science Education and Research, Deralakatte, Mangaluru-Karnataka, India
| | - Indrani Karunasagar
- Nitte (Deemed to Be University), Division of Infectious Diseases, Nitte University Centre for Science Education and Research, Deralakatte, Mangaluru-Karnataka, India
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5
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Yang Q, Wang Q, Wu J, Zhang Y, Wei D, Qu B, Liu Y, Fu S. Distinct dynamics of Vibrio parahaemolyticus populations in two farming models. J Appl Microbiol 2021; 133:1146-1155. [PMID: 34260793 DOI: 10.1111/jam.15217] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Revised: 06/16/2021] [Accepted: 07/06/2021] [Indexed: 11/28/2022]
Abstract
AIMS Despite the recent prosperity of shrimp cultivation in China, very little is known about how different shrimp farming models influence the dynamics of Vibrio parahaemolyticus populations and the antibiotic resistance of this bacterium. METHODS AND RESULTS To this end, we conducted continuous surveillance of V. parahaemolyticus on four farms over 3 years: two traditional shrimp farms with daily water exchange and two farms operated in the recirculating aquaculture systems (RAS). No antibiotics were used in these farms to exclude the potential impacts of antibiotics on the emergence of antibacterial resistance. Multilocus sequence typing was utilized to characterize the dynamics of V. parahaemolyticus populations. Whole-genome sequencing (WGS) was conducted to determine the representative sequence types (STs) at each farm. Results revealed that the population structure of V. parahaemolyticus remained stable over time in both RAS farms, with only nine and four STs observed at each. In contrast, annual replacement of V. parahaemolyticus populations was observed in traditional farms with 26 and 28 STs identified in rearing water. WGS of 50 isolates divided them into five clusters, of which ST917a isolates harboured a genomic island that disrupted the gene recA. Pair-wised genomic comparison of isolates from the same STs showed that they were genetically related but belonged to different clones associated with geographical distribution. CONCLUSIONS These results suggested that RAS presented a specific ecological niche by minimizing the water exchanges with the external environment. In contrast, traditional farming might pose a food safety issue by introducing new V. parahaemolyticus populations with antibiotic resistance genes. SIGNIFICANCE AND IMPACT OF THE STUDY Our results expose the potential food safety issue associated with conventional agriculture and should encourage the development of preventive strategies to reduce the emergence of resistant V. parahaemolyticus populations.
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Affiliation(s)
- Qian Yang
- Center for Microbial Ecology and Technology (CMET), Ghent University, Ghent, Belgium
| | - Qingyao Wang
- College of Marine Science and Environment, Dalian Ocean University, Dalian, China.,Key Laboratory of Environment Controlled Aquaculture (KLECA), Ministry of Education, Dalian, China
| | - Junmin Wu
- College of Marine Science and Environment, Dalian Ocean University, Dalian, China.,Key Laboratory of Environment Controlled Aquaculture (KLECA), Ministry of Education, Dalian, China
| | - Yixiang Zhang
- CAS Center for Excellence in Molecular Plant Sciences, Shanghai Institutes for Biological Sciences (SIBS), Chinese Academy of Sciences, Shanghai, China.,University of Chinese Academy of Sciences, Shanghai, China
| | - Dawei Wei
- Institute of Microbiology, Chinese Academy of Sciences, Beijing, China
| | - Baocheng Qu
- College of Marine Science and Environment, Dalian Ocean University, Dalian, China.,Key Laboratory of Environment Controlled Aquaculture (KLECA), Ministry of Education, Dalian, China
| | - Ying Liu
- College of Marine Science and Environment, Dalian Ocean University, Dalian, China.,Key Laboratory of Environment Controlled Aquaculture (KLECA), Ministry of Education, Dalian, China
| | - Songzhe Fu
- College of Marine Science and Environment, Dalian Ocean University, Dalian, China.,Key Laboratory of Environment Controlled Aquaculture (KLECA), Ministry of Education, Dalian, China
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6
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Yu LH, Teh CSJ, Yap KP, Thong KL. Diagnostic approaches and contribution of next-generation sequencing technologies in genomic investigation of Vibrio parahaemolyticus that caused acute hepatopancreatic necrosis disease (AHPND). AQUACULTURE INTERNATIONAL : JOURNAL OF THE EUROPEAN AQUACULTURE SOCIETY 2020; 28:2547-2559. [PMID: 33013008 PMCID: PMC7519849 DOI: 10.1007/s10499-020-00610-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Accepted: 09/23/2020] [Indexed: 06/11/2023]
Abstract
A unique strain of Vibrio parahaemolyticus (designated as VPAHPND) causes acute hepatopancreatic necrosis disease (AHPND), a deadly bacterial disease associated with mass mortality in cultured shrimps since 2009. AHPND is responsible for severe economic losses worldwide, causing multimillion-dollar loss annually. Because of the rapid and high mortality rates in shrimps, substantial research has been carried out to develop rapid detection techniques. Also, recent technological advances such as the next-generation sequencing (NGS) have made it possible to elucidate relevant information about a pathogen in a single assay. This review summarizes the current research pertaining to VPAHPND, focusing on diagnosis and contribution of NGS technologies in the genomic studies of AHPND.
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Affiliation(s)
- Lean Huat Yu
- Institute of Biological Science, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - Cindy Shuan Ju Teh
- Department of Medical Microbiology, Faculty of Medicine, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - Kien Pong Yap
- Institute of Biological Science, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - Kwai Lin Thong
- Nanocat Research Centre, University of Malaya, 50603 Kuala Lumpur, Malaysia
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7
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González-Gómez JP, Soto-Rodriguez S, López-Cuevas O, Castro-Del Campo N, Chaidez C, Gomez-Gil B. Phylogenomic Analysis Supports Two Possible Origins for Latin American Strains of Vibrio parahaemolyticus Associated with Acute Hepatopancreatic Necrosis Disease (AHPND). Curr Microbiol 2020; 77:3851-3860. [PMID: 32959087 DOI: 10.1007/s00284-020-02214-w] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Accepted: 09/13/2020] [Indexed: 02/07/2023]
Abstract
Acute hepatopancreatic necrosis disease (AHPND) is a severe disease affecting recently stocked cultured shrimps. The disease is mainly caused by V. parahaemolyticus that harbors the pVA1 plasmid; this plasmid contains the pirA and pirB genes, which encode a delta-endotoxin. AHPND originated in China in 2009 and has since spread to several other Asian countries and recently to Latin America (2013). Many Asian strains have been sequenced, and their sequences are publicly accessible in scientific databases, but only four strains from Latin America have been reported. In this study, we analyzed nine pVA1-harboring V. parahaemolyticus sequences from strains isolated in Mexico along with the 38 previously available pVA1-harboring V. parahaemolyticus sequences and the reference strain RIMD 2210633. The studied sequences were clustered into three phylogenetic clades (Latin American, Malaysian, and Cosmopolitan) through pangenomic and phylogenomic analysis. The nucleotide sequence alignment of the pVA1 plasmids harbored by the Asian and Latin American strains confirmed that the main structural difference in the plasmid between the Asian and Latin American strains is the absence of the Tn3 transposon in the Asian strains; in addition, some deletions in the pirAB region were found in two of the Latin American strains. Our study represents the most robust and inclusive phylogenomic analysis of pVA1-harboring V. parahaemolyticus conducted to date and provides insight into the epidemiology of AHPND. In addition, this study highlights that disease diagnosis through the detection of the pirA and pirB genes is an inadequate approach due to the instability of these genes.
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Affiliation(s)
- Jean Pierre González-Gómez
- Laboratorio Nacional Para la Investigación en Inocuidad Alimentaria (LANIIA), Centro de Investigación en Alimentación y Desarrollo, A.C. (CIAD), Carretera a Eldorado Km 5.5, Campo El Diez, 80110, Culiacán, Sinaloa, Mexico
| | - Sonia Soto-Rodriguez
- Centro de Investigación en Alimentación y Desarrollo, A.C. (CIAD), Unidad Mazatlán en Acuicultura y Manejo Ambiental, AP 711, Mazatlán, Sinaloa, Mexico
| | - Osvaldo López-Cuevas
- Laboratorio Nacional Para la Investigación en Inocuidad Alimentaria (LANIIA), Centro de Investigación en Alimentación y Desarrollo, A.C. (CIAD), Carretera a Eldorado Km 5.5, Campo El Diez, 80110, Culiacán, Sinaloa, Mexico
| | - Nohelia Castro-Del Campo
- Laboratorio Nacional Para la Investigación en Inocuidad Alimentaria (LANIIA), Centro de Investigación en Alimentación y Desarrollo, A.C. (CIAD), Carretera a Eldorado Km 5.5, Campo El Diez, 80110, Culiacán, Sinaloa, Mexico
| | - Cristóbal Chaidez
- Laboratorio Nacional Para la Investigación en Inocuidad Alimentaria (LANIIA), Centro de Investigación en Alimentación y Desarrollo, A.C. (CIAD), Carretera a Eldorado Km 5.5, Campo El Diez, 80110, Culiacán, Sinaloa, Mexico.
| | - Bruno Gomez-Gil
- Centro de Investigación en Alimentación y Desarrollo, A.C. (CIAD), Unidad Mazatlán en Acuicultura y Manejo Ambiental, AP 711, Mazatlán, Sinaloa, Mexico.
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8
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Yan CZY, Austin CM, Ayub Q, Rahman S, Gan HM. Genomic characterization of Vibrio parahaemolyticus from Pacific white shrimp and rearing water in Malaysia reveals novel sequence types and structural variation in genomic regions containing the Photorhabdus insect-related (Pir) toxin-like genes. FEMS Microbiol Lett 2020; 366:5582596. [PMID: 31589302 DOI: 10.1093/femsle/fnz211] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Accepted: 10/01/2019] [Indexed: 12/13/2022] Open
Abstract
The Malaysian and global shrimp aquaculture production has been significantly impacted by acute hepatopancreatic necrosis disease (AHPND) typically caused by Vibrio parahaemolyticus harboring the pVA plasmid containing the pirAVp and pirBVp genes, which code for Photorhabdus insect-related (Pir) toxin. The limited genomic resource for V. parahaemolyticus strains from Malaysian aquaculture farms precludes an in-depth understanding of their diversity and evolutionary relationships. In this study, we isolated shrimp-associated and environmental (rearing water) V. parahaemolyticus from three aquaculture farms located in Northern and Central Malaysia followed by whole-genome sequencing of 40 randomly selected isolates on the Illumina MiSeq. Phylogenomic analysis and multilocus sequence typing (MLST) reveal distinct lineages of V. parahaemolyticus that harbor the pirABVp genes. The recovery of pVA plasmid backbone devoid of pirAVp or pirABVp in some V. parahaemolyticus isolates suggests that the toxin genes are prone to deletion. The new insight gained from phylogenomic analysis of Asian V. parahaemolyticus, in addition to the observed genomic instability of pVa plasmid, will have implications for improvements in aquaculture practices to diagnose, treat or limit the impacts of this disease.
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Affiliation(s)
- Chrystine Zou Yi Yan
- School of Science, Monash University Malaysia, Jalan Lagoon Selatan, 47500 Bandar Sunway, Selangor Darul Ehsan, Malaysia.,Monash University Malaysia Genomics Facility, Tropical Medicine and Biology Multidisciplinary Platform, Jalan Lagoon Selatan, 47500 Bandar Sunway, Selangor Darul Ehsan, Malaysia
| | - Christopher M Austin
- School of Science, Monash University Malaysia, Jalan Lagoon Selatan, 47500 Bandar Sunway, Selangor Darul Ehsan, Malaysia.,Monash University Malaysia Genomics Facility, Tropical Medicine and Biology Multidisciplinary Platform, Jalan Lagoon Selatan, 47500 Bandar Sunway, Selangor Darul Ehsan, Malaysia.,Centre for Integrative Ecology, School of Life and Environmental Sciences, Deakin University, Geelong, 3220 Victoria, Australia.,Deakin Genomics Centre, Deakin University, Geelong 3220, Victoria, Australia
| | - Qasim Ayub
- School of Science, Monash University Malaysia, Jalan Lagoon Selatan, 47500 Bandar Sunway, Selangor Darul Ehsan, Malaysia.,Monash University Malaysia Genomics Facility, Tropical Medicine and Biology Multidisciplinary Platform, Jalan Lagoon Selatan, 47500 Bandar Sunway, Selangor Darul Ehsan, Malaysia
| | - Sadequr Rahman
- School of Science, Monash University Malaysia, Jalan Lagoon Selatan, 47500 Bandar Sunway, Selangor Darul Ehsan, Malaysia.,Monash University Malaysia Genomics Facility, Tropical Medicine and Biology Multidisciplinary Platform, Jalan Lagoon Selatan, 47500 Bandar Sunway, Selangor Darul Ehsan, Malaysia
| | - Han Ming Gan
- School of Science, Monash University Malaysia, Jalan Lagoon Selatan, 47500 Bandar Sunway, Selangor Darul Ehsan, Malaysia.,Monash University Malaysia Genomics Facility, Tropical Medicine and Biology Multidisciplinary Platform, Jalan Lagoon Selatan, 47500 Bandar Sunway, Selangor Darul Ehsan, Malaysia.,Centre for Integrative Ecology, School of Life and Environmental Sciences, Deakin University, Geelong, 3220 Victoria, Australia.,Deakin Genomics Centre, Deakin University, Geelong 3220, Victoria, Australia
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9
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Horizontal Plasmid Transfer Promotes the Dissemination of Asian Acute Hepatopancreatic Necrosis Disease and Provides a Novel Mechanism for Genetic Exchange and Environmental Adaptation. mSystems 2020; 5:5/2/e00799-19. [PMID: 32184363 PMCID: PMC7380584 DOI: 10.1128/msystems.00799-19] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
Global outbreaks of shrimp acute hepatopancreatic necrosis disease (AHPND) caused by V. parahaemolyticus represent an urgent issue for the shrimp industry. This study revealed that the transmission mode of AHPND consists of two steps, the transregional dissemination of V. parahaemolyticus and the horizontal transfer of an AHPND-associated plasmid. Surprisingly, the introduction of the AHPND-associated plasmid also offers a novel mechanism of genetic exchange mediated by insertion sequences, and it improved the fitness of V. parahaemolyticus in a harsh environment. The results presented herein suggest that current shrimp farming practices promote genetic mixture between endemic and oceanic V. parahaemolyticus populations, which introduced the plasmid and accelerated bacterial adaptation by the acquisition of ecologically important functions. This entails a risk of the emergence of new virulent populations both for shrimp and humans. This study improves our understanding of the global dissemination of the AHPND-associated plasmid and highlights the urgent need to improve biosecurity for shrimp farming. Vibrio parahaemolyticus is an important foodborne pathogen and has recently gained particular notoriety because it causes acute hepatopancreatic necrosis disease (AHPND) in shrimp, which has caused significant economic loss in the shrimp industry. Here, we report a whole-genome analysis of 233 V. parahaemolyticus strains isolated from humans, diseased shrimp, and environmental samples collected between 2008 and 2017, providing unprecedented insight into the historical spread of AHPND. The results show that V. parahaemolyticus is genetically diverse and can be divided into 84 sequence types (STs). However, genomic analysis of three STs of V. parahaemolyticus identified seven transmission routes in Asia since 1996, which promoted the transfer of an AHPND-associated plasmid. Notably, the insertion sequence (ISVal1) from the plasmid subsequently mediated the genetic exchange among V. parahaemolyticus STs and resulted in the deletion of an 11-kb region regulating cell mobility and the production of capsular polysaccharides. Phenotype assays confirmed that this deletion enhanced biofilm formation, providing a novel mechanism for environmental adaptation. We conclude that the transmission mode of AHPND consists of two steps, the transmission of V. parahaemolyticus and the subsequent horizontal transfer of the AHPND-associated plasmid. This plasmid allows ISVal1 to mediate genetic exchange and improve pathogen fitness in shrimp ponds. Current shrimp farming practices promoted such genetic exchanges, which highlighted a risk of the emergence of new virulent populations, with potentially devastating consequences for both aquaculture and human health. This study addressed the basic questions regarding the transmission mechanism of AHPND and provided novel insights into shrimp and human disease management. IMPORTANCE Global outbreaks of shrimp acute hepatopancreatic necrosis disease (AHPND) caused by V. parahaemolyticus represent an urgent issue for the shrimp industry. This study revealed that the transmission mode of AHPND consists of two steps, the transregional dissemination of V. parahaemolyticus and the horizontal transfer of an AHPND-associated plasmid. Surprisingly, the introduction of the AHPND-associated plasmid also offers a novel mechanism of genetic exchange mediated by insertion sequences, and it improved the fitness of V. parahaemolyticus in a harsh environment. The results presented herein suggest that current shrimp farming practices promote genetic mixture between endemic and oceanic V. parahaemolyticus populations, which introduced the plasmid and accelerated bacterial adaptation by the acquisition of ecologically important functions. This entails a risk of the emergence of new virulent populations both for shrimp and humans. This study improves our understanding of the global dissemination of the AHPND-associated plasmid and highlights the urgent need to improve biosecurity for shrimp farming.
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10
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Monreal-Escalante E, Rosales-Mendoza S, Govea-Alonso DO, Campa-Córdova ÁI, Angulo C. Genetically-engineered plants yield an orally immunogenic PirA-like toxin from Vibrio parahaemolyticus. Int J Biol Macromol 2019; 137:126-131. [PMID: 31238071 DOI: 10.1016/j.ijbiomac.2019.06.159] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2019] [Revised: 06/14/2019] [Accepted: 06/21/2019] [Indexed: 11/19/2022]
Abstract
Vibrio parahaemolyticus is the main etiological agent of human gastroenteritis by seafood consumption and some strains from this species causing the Acute Hepatopancreatic Necrosis Disease in shrimp have been recently reported. The PirA-like toxin from V. parahaemolyticus (ToxA) has been recently reported as an attractive antigen implicated in subunit vaccine development. Since plants are attractive hosts for the production and delivery of vaccines in the present study plants expressing ToxA were developed to account with a low cost platform for the production and oral delivery of ToxA. Tobacco plants were genetically engineered by Agrobacterium-mediated transformation to stably integrate the ToxA-coding gene into the nuclear genome. Transgenic lines were rescued in kanamycin-containing medium and analyzed by ELISA to determine ToxA yields observing levels up to 9 μg g-1 FW leaf tissues. Western blot analysis confirmed the presence of the ToxA protein in plant extracts. Immunogenicity assessment of the plant-made ToxA was performed in mice, comprising a 4-dose oral immunization scheme; revealing the induction of anti-ToxA humoral responses (IgG in serum and IgA in feces). This study opens the path for the development of low cost plant-based vaccines against Vibrio parahaemolyticus.
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Affiliation(s)
- Elizabeth Monreal-Escalante
- Laboratorio de Biofarmacéuticos Recombinantes, Facultad de Ciencias Químicas, Universidad Autónoma de San Luis Potosí, Av. Dr. Manuel Nava 6, S.L.P, C.P. 78210, Mexico; Sección de Biotecnología, Centro de Investigación en Ciencias de la Salud y Biomedicina, Universidad Autónoma de San Luis Potosí, Av. Sierra Leona 550, Lomas 2ª. Sección, San Luis Potosí S.L.P. C.P. 78210, Mexico; Grupo de Inmunología & Vacunología, Centro de Investigaciones Biológicas del Noroeste, SC. Instituto Politécnico Nacional 195, Playa Palo de Santa Rita Sur, La Paz B.C.S. C.P. 23096, Mexico
| | - Sergio Rosales-Mendoza
- Laboratorio de Biofarmacéuticos Recombinantes, Facultad de Ciencias Químicas, Universidad Autónoma de San Luis Potosí, Av. Dr. Manuel Nava 6, S.L.P, C.P. 78210, Mexico; Sección de Biotecnología, Centro de Investigación en Ciencias de la Salud y Biomedicina, Universidad Autónoma de San Luis Potosí, Av. Sierra Leona 550, Lomas 2ª. Sección, San Luis Potosí S.L.P. C.P. 78210, Mexico.
| | - Dania O Govea-Alonso
- Laboratorio de Biofarmacéuticos Recombinantes, Facultad de Ciencias Químicas, Universidad Autónoma de San Luis Potosí, Av. Dr. Manuel Nava 6, S.L.P, C.P. 78210, Mexico; Sección de Biotecnología, Centro de Investigación en Ciencias de la Salud y Biomedicina, Universidad Autónoma de San Luis Potosí, Av. Sierra Leona 550, Lomas 2ª. Sección, San Luis Potosí S.L.P. C.P. 78210, Mexico
| | - Ángel I Campa-Córdova
- Grupo de Inmunología & Vacunología, Centro de Investigaciones Biológicas del Noroeste, SC. Instituto Politécnico Nacional 195, Playa Palo de Santa Rita Sur, La Paz B.C.S. C.P. 23096, Mexico
| | - Carlos Angulo
- Grupo de Inmunología & Vacunología, Centro de Investigaciones Biológicas del Noroeste, SC. Instituto Politécnico Nacional 195, Playa Palo de Santa Rita Sur, La Paz B.C.S. C.P. 23096, Mexico
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Yang Q, Dong X, Xie G, Fu S, Zou P, Sun J, Wang Y, Huang J. Comparative genomic analysis unravels the transmission pattern and intra-species divergence of acute hepatopancreatic necrosis disease (AHPND)-causing Vibrio parahaemolyticus strains. Mol Genet Genomics 2019; 294:1007-1022. [PMID: 30968246 DOI: 10.1007/s00438-019-01559-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Accepted: 04/01/2019] [Indexed: 12/19/2022]
Abstract
Acute hepatopancreatic necrosis disease (AHPND) is a recently discovered shrimp disease that has become a severe threat to global shrimp-farming industry. The causing agents of AHPND were identified as Vibrio parahaemolyticus and other vibrios harboring a plasmid encoding binary toxins PirAvp/PirBvp. However, the epidemiological involvement of environmental vibrios in AHPND is poorly understood. In this study, with an aim to reveal the possible transmission route of AHPND-causing V. parahaemolyticus, we sequenced and analyzed the genomes of four pairs of V. parahaemolyticus strains from four representative regions of shrimp farming in China, each including one strain isolated from diseased shrimp during an AHPND outbreak and one strain isolated from sediment before AHPND outbreaks. Our results showed that all the four shrimp-isolated and three of the sediment-isolated strains encode and secret PirAvp/PirBvp toxins and, therefore, are AHPND-causing strains. In silico multilocus sequence typing and high-resolution phylogenomic analysis based on single-nucleotide polymorphisms, as well as comparison of genomic loci in association with prophages and capsular polysaccharides (CPSs) consistently pointed to a close genetic relationship between the shrimp- and sediment-isolated strains obtained from the same region. In addition, our analyses revealed that the sequences associated with prophages, CPSs, and type VI secretion system-1 are highly divergent among strains from different regions, implying that these genes may play vital roles in environmental adaptation for AHPND-causing V. parahaemolyticus and thereby be potential targets for AHPND control. Summing up, this study provides the first direct evidence regarding the transmission route of AHPND-causing V. parahaemolyticus and underscores that V. parahaemolyticus in shrimp are most likely originated from local environment. The importance of environmental disinfection measures in shrimp farming was highlighted.
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Affiliation(s)
- Qian Yang
- Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Key Laboratory of Maricultural Organism Disease Control, Ministry of Agriculture and Rural Affairs, Qingdao Key Laboratory of Mariculture Epidemiology and Biosecurity, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, China
| | - Xuan Dong
- Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Key Laboratory of Maricultural Organism Disease Control, Ministry of Agriculture and Rural Affairs, Qingdao Key Laboratory of Mariculture Epidemiology and Biosecurity, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, China
| | - Guosi Xie
- Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Key Laboratory of Maricultural Organism Disease Control, Ministry of Agriculture and Rural Affairs, Qingdao Key Laboratory of Mariculture Epidemiology and Biosecurity, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, China
| | - Songzhe Fu
- College of Marine Technology and Environment, Dalian Ocean University, Dalian, China.
| | - Peizhuo Zou
- Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Key Laboratory of Maricultural Organism Disease Control, Ministry of Agriculture and Rural Affairs, Qingdao Key Laboratory of Mariculture Epidemiology and Biosecurity, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, China
| | - Jing Sun
- Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Key Laboratory of Maricultural Organism Disease Control, Ministry of Agriculture and Rural Affairs, Qingdao Key Laboratory of Mariculture Epidemiology and Biosecurity, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, China
| | - Yi Wang
- College of Marine Technology and Environment, Dalian Ocean University, Dalian, China
| | - Jie Huang
- Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Key Laboratory of Maricultural Organism Disease Control, Ministry of Agriculture and Rural Affairs, Qingdao Key Laboratory of Mariculture Epidemiology and Biosecurity, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, China.
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Wu W, Jing Z, Yu X, Yang Q, Sun J, Liu C, Zhang W, Zeng L, He H. Recent advances in screening aquatic products for Vibrio spp. Trends Analyt Chem 2019. [DOI: 10.1016/j.trac.2018.11.043] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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