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Lyu S, Xiong F, Qi T, Shen W, Guo Q, Han M, Liu L, Bu W, Yuan J, Lou B. Isolation and characterization of a novel temperate bacteriophage infecting Aeromonas hydrophila isolated from a Macrobrachium rosenbergii larvae pond. Virus Res 2024; 339:199279. [PMID: 37992971 PMCID: PMC10709362 DOI: 10.1016/j.virusres.2023.199279] [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: 07/17/2023] [Revised: 11/14/2023] [Accepted: 11/18/2023] [Indexed: 11/24/2023]
Abstract
Aeromonas hydrophila is an opportunistic pathogen that frequently leads to significant mortality in various commercially cultured aquatic species. Bacteriophages offer an alternative strategy for pathogens elimination. In this study, we isolated, identified, and characterized a novel temperate A. hydrophila phage, designated as P05B. The bacteriophage P05B is a myovirus based on its morphological features, and possesses the capability to lyse A. hydrophila strains isolated from shrimp. The optimal multiplicity of infection (MOI), adsorption rate, latent period, and burst size for phage P05B were determined to be 0.001, 91.7 %, 20 min, and 483 PFU/cell, respectively. Phage P05B displayed stability across a range of temperatures (28-50 °C) and pH values (4.0-10.0). Sequence analysis unveiled that the genome of phage P05B comprises 32,302 base pairs with an average G + C content of 59.4 %. A total of 40 open reading frames (ORF) were encoded within the phage P05B genome. The comparative genomic analyses clearly implied that P05B might represent a novel species of the genus Bielevirus under Peduoviridae family. A phylogenetic tree was reconstructed, demonstrating that P05B shares a close evolutionary relationship with other Aeromonas and Aeromonas phages. In conclusion, this study increased our knowledge about a new temperate phage of A. hydrophila with strong lytic ability.
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Affiliation(s)
- Sunjian Lyu
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Institute of Hydrobiology, Zhejiang Academy of Agricultural Sciences, 198, Shiqiao Rd, Hangzhou, Zhejiang, 310021, PR China
| | - Fulei Xiong
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Institute of Hydrobiology, Zhejiang Academy of Agricultural Sciences, 198, Shiqiao Rd, Hangzhou, Zhejiang, 310021, PR China
| | - Tianpeng Qi
- College of Animal Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou, Zhejiang, 310058, PR China
| | - Weifeng Shen
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Institute of Hydrobiology, Zhejiang Academy of Agricultural Sciences, 198, Shiqiao Rd, Hangzhou, Zhejiang, 310021, PR China
| | - Qi Guo
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Institute of Hydrobiology, Zhejiang Academy of Agricultural Sciences, 198, Shiqiao Rd, Hangzhou, Zhejiang, 310021, PR China
| | - Mingming Han
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Institute of Hydrobiology, Zhejiang Academy of Agricultural Sciences, 198, Shiqiao Rd, Hangzhou, Zhejiang, 310021, PR China
| | - Li Liu
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Institute of Hydrobiology, Zhejiang Academy of Agricultural Sciences, 198, Shiqiao Rd, Hangzhou, Zhejiang, 310021, PR China.
| | - Weishao Bu
- Yunhe County Qingjiang ecological breeding cooperative, Shipu Village, Jinshuitan Town, Yunhe County, Lishui, Zhejiang, 310018, PR China
| | - Julin Yuan
- Agriculture Ministry Key Laboratory of Healthy Freshwater Aquaculture, Key Laboratory of Fish Health and Nutrition of Zhejiang Province, Zhejiang Institute of Freshwater Fisheries, 999 South Hangchangqiao Road, Huzhou, Zhejiang, 313001, PR China
| | - Bao Lou
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Institute of Hydrobiology, Zhejiang Academy of Agricultural Sciences, 198, Shiqiao Rd, Hangzhou, Zhejiang, 310021, PR China
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Rai S, Tyagi A, Naveen Kumar B, Reddy S VK. Isolation and characterization of Aeromonas hydrophila lytic phage, and evaluation of a phage cocktail against A. hydrophila contamination in fish fillet. Food Control 2023; 145:109460. [DOI: 10.1016/j.foodcont.2022.109460] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Pan L, Li D, Lin W, Liu W, Qu C, Qian M, Cai R, Zhou Q, Wang F, Tong Y. Novel Aeromonas Phage Ahy-Yong1 and Its Protective Effects against Aeromonas hydrophila in Brocade Carp (Cyprinus aka Koi). Viruses 2022; 14. [PMID: 36423108 DOI: 10.3390/v14112498] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2022] [Revised: 11/07/2022] [Accepted: 11/08/2022] [Indexed: 11/16/2022] Open
Abstract
Aeromonas hydrophila is a zoonotic pathogen and an important fish pathogen. A new lytic phage, Ahy-yong1, against multi-antibiotic-resistant pathogen A. hydrophila was isolated, identified, and tentatively used in therapy. Ahy-yong1 possesses a head of approximately 66 nm in diameter and a short tail of approximately 26 nm in length and 32 nm in width. Its complete dsDNA genome is 43,374 bp with a G + C content of 59.4%, containing 52 predicted opening reading frames (ORFs). Taxonomic analysis indicated Ahy-yong1 as a new species of the Ahphunavirus genus of the Autographiviridae family of the Caudoviricetes class. Ahy-yong1 was active only against its indicator host strain among the 35 strains tested. It is stable at 30-40 °C and at pH 2-12. Aeromonas phage Ahy-yong1 revealed an effective biofilm removal capacity and an obvious protective effect in brocade carp (Cyprinus aka Koi). The average cumulative mortality for the brocade carp in the blank groups intraperitoneally injected with PBS was 1.7% ± 2.4%;for the control groups treated with A. hydrophila (108 CFU/fish) via intraperitoneal injection, it was 100.00%;and for the test group I, successively treated with A. hydrophila (108 CFU/fish) and Aeromonas phage Ahy-yong1 (107 PFU/fish) via intraperitoneal injection witha time interval of 2 hours, it was only 43.4% ± 4.7%. Furthermore, the cumulative mortality of the test group II, successively treated with Aeromonas phage Ahy-yong1 (107 PFU/fish) and A. hydrophila (108 CFU/fish), was only 20.0% ± 8.2%, and that of the test group III, simultaneously treated with Aeromonas phage Ahy-yong1 (107 PFU/fish) and A. hydrophila (108 CFU/fish), was only 30.0% ± 8.2%. The results demonstrated that phage Ahy-yong1 was very effective in the therapies against A. hydrophila A18, prophylaxis was more effective than rescue, and earlier treatment was better for the reduction of mortality. This study enriches knowledge about Aeromonas phages.
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Feng C, Jia K, Chi T, Chen S, Yu H, Zhang L, Haidar Abbas Raza S, Alshammari AM, Liang S, Zhu Z, Li T, Qi Y, Shan X, Qian A, Zhang D, Zhang L, Sun W. Lytic Bacteriophage PZL-Ah152 as Biocontrol Measures Against Lethal Aeromonas hydrophila Without Distorting Gut Microbiota. Front Microbiol 2022; 13:898961. [PMID: 35903472 PMCID: PMC9315158 DOI: 10.3389/fmicb.2022.898961] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Accepted: 05/23/2022] [Indexed: 11/14/2022] Open
Abstract
Phage therapy is an alternative approach to overcome the problem of multidrug resistance in bacteria. In this study, a bacteriophage named PZL-Ah152, which infects Aeromonas hydrophila, was isolated from sewage, and its biological characteristics and genome were studied. The genome contained 54 putative coding sequences and lacked known putative virulence factors, so it could be applied to phage therapy. Therefore, we performed a study to (i) investigate the efficacy of PZL-Ah152 in reducing the abundance of pathogenic A. hydrophila strain 152 in experimentally infected crucian carps, (ii) evaluate the safety of 12 consecutive days of intraperitoneal phage injection in crucian carps, and (iii) determine how bacteriophages impact the normal gut microbiota. The in vivo and in vitro results indicated that the phage could effectively eliminate A. hydrophila. Administering PZL-Ah152 (2 × 109 PFU) could effectively protect the fish (2 × 108 CFU/carp). Furthermore, a 12-day consecutive injection of PZL-Ah152 did not cause significant adverse effects in the main organs of the treated animals. We also found that members of the genus Aeromonas could enter and colonize the gut. The phage PZL-Ah152 reduced the number of colonies of the genus Aeromonas. However, no significant changes were observed in α-diversity and β-diversity parameters, which suggested that the consumed phage had little effect on the gut microbiota. All the results illustrated that PZL-Ah152 could be a new therapeutic method for infections caused by A. hydrophila.
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Affiliation(s)
- Chao Feng
- College of Animal Science and Technology, Jilin Agricultural University, Jilin, China
| | - Kaixiang Jia
- College of Animal Science and Technology, Jilin Agricultural University, Jilin, China
| | - Teng Chi
- College of Animal Science and Technology, Jilin Agricultural University, Jilin, China
| | - Shuaimin Chen
- Institute of Agricultural Resources and Environment, Jilin Academy of Agricultural Sciences, Changchun, China
| | - Huabo Yu
- College of Animal Science and Technology, Jilin Agricultural University, Jilin, China
| | - Liang Zhang
- College of Animal Science and Technology, Jilin Agricultural University, Jilin, China
| | | | | | - Shuang Liang
- College of Animal Science and Technology, Jilin Agricultural University, Jilin, China
| | - Zishan Zhu
- College of Animal Science and Technology, Jilin Agricultural University, Jilin, China
| | - Tingxuan Li
- College of Animal Science and Technology, Jilin Agricultural University, Jilin, China
| | - Yanling Qi
- College of Animal Science and Technology, Jilin Agricultural University, Jilin, China
| | - Xiaofeng Shan
- College of Animal Science and Technology, Jilin Agricultural University, Jilin, China
| | - Aidong Qian
- College of Animal Science and Technology, Jilin Agricultural University, Jilin, China
| | - Dongxing Zhang
- College of Animal Science and Technology, Jilin Agricultural University, Jilin, China
| | - Lei Zhang
- College of Animal Science and Technology, Jilin Agricultural University, Jilin, China
- *Correspondence: Lei Zhang,
| | - Wuwen Sun
- College of Animal Science and Technology, Jilin Agricultural University, Jilin, China
- Wuwen Sun,
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Plumet L, Ahmad-Mansour N, Dunyach-Remy C, Kissa K, Sotto A, Lavigne JP, Costechareyre D, Molle V. Bacteriophage Therapy for Staphylococcus Aureus Infections: A Review of Animal Models, Treatments, and Clinical Trials. Front Cell Infect Microbiol 2022; 12:907314. [PMID: 35782148 PMCID: PMC9247187 DOI: 10.3389/fcimb.2022.907314] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Accepted: 05/23/2022] [Indexed: 01/22/2023] Open
Abstract
Staphylococcus aureus (S. aureus) is a common and virulent human pathogen causing several serious illnesses including skin abscesses, wound infections, endocarditis, osteomyelitis, pneumonia, and toxic shock syndrome. Antibiotics were first introduced in the 1940s, leading to the belief that bacterial illnesses would be eradicated. However, microorganisms, including S. aureus, began to develop antibiotic resistance from the increased use and abuse of antibiotics. Antibiotic resistance is now one of the most serious threats to global public health. Bacteria like methicillin-resistant Staphylococcus aureus (MRSA) remain a major problem despite several efforts to find new antibiotics. New treatment approaches are required, with bacteriophage treatment, a non-antibiotic strategy to treat bacterial infections, showing particular promise. The ability of S. aureus to resist a wide range of antibiotics makes it an ideal candidate for phage therapy studies. Bacteriophages have a relatively restricted range of action, enabling them to target pathogenic bacteria. Their usage, usually in the form of a cocktail of bacteriophages, allows for more focused treatment while also overcoming the emergence of resistance. However, many obstacles remain, particularly in terms of their effects in vivo, necessitating the development of animal models to assess the bacteriophage efficiency. Here, we provide a review of the animal models, the various clinical case treatments, and clinical trials for S. aureus phage therapy.
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Affiliation(s)
- Lucile Plumet
- Laboratory of Pathogen Host Interactions, Université de Montpellier, CNRS, UMR 5235, Montpellier, France
| | - Nour Ahmad-Mansour
- Laboratory of Pathogen Host Interactions, Université de Montpellier, CNRS, UMR 5235, Montpellier, France
| | - Catherine Dunyach-Remy
- Virulence Bactérienne et Infections Chroniques, INSERM U1047, Department of Microbiology and Hospital Hygiene, CHU Nîmes, Univ Montpellier, Nîmes, France
| | - Karima Kissa
- Laboratory of Pathogen Host Interactions, Université de Montpellier, CNRS, UMR 5235, Montpellier, France
| | - Albert Sotto
- Virulence Bactérienne et Infections Chroniques, INSERM U1047, Department of Infectious and Tropical Diseases, CHU Nîmes, Univ Montpellier, Nîmes, France
| | - Jean-Philippe Lavigne
- Virulence Bactérienne et Infections Chroniques, INSERM U1047, Department of Microbiology and Hospital Hygiene, CHU Nîmes, Univ Montpellier, Nîmes, France
| | - Denis Costechareyre
- Laboratory of Pathogen Host Interactions, Université de Montpellier, CNRS, UMR 5235, Montpellier, France
- Greenphage, Cap Alpha, Clapiers, France
| | - Virginie Molle
- Laboratory of Pathogen Host Interactions, Université de Montpellier, CNRS, UMR 5235, Montpellier, France
- *Correspondence: Virginie Molle,
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Schulz P, Pajdak-czaus J, Siwicki AK. In Vivo Bacteriophages’ Application for the Prevention and Therapy of Aquaculture Animals–Chosen Aspects. Animals (Basel) 2022; 12:1233. [PMID: 35625078 PMCID: PMC9137707 DOI: 10.3390/ani12101233] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Revised: 05/07/2022] [Accepted: 05/09/2022] [Indexed: 12/14/2022] Open
Abstract
To meet the nutritional requirements of our growing population, animal production must double by 2050, and due to the exhaustion of environmental capacity, any growth will have to come from aquaculture. Aquaculture is currently undergoing a dynamic development, but the intensification of production increases the risk of bacterial diseases. In recent years, there has been a drastic development in the resistance of pathogenic bacteria to antibiotics and chemotherapeutic agents approved for use, which has also taken place in aquaculture. Consequently, animal mortality and economic losses in livestock have increased. The use of drugs in closed systems is an additional challenge as it can damage biological filters. For this reason, there has been a growing interest in natural methods of combating pathogens. One of the methods is the use of bacteriophages both for prophylactic purposes and therapy. This work summarizes the diverse results of the in vivo application of bacteriophages for the prevention and control of bacterial pathogens in aquatic animals to provide a reference for further research on bacteriophages in aquaculture and to compare major achievements in the field.
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El-Wafai NA, Alharbi NK, Ezzat Ahmed A, El-Zamik FI, Mahgoub SA, Atia AM, Abdel-Hamid EA. Controlling of multidrug resistant Aeromonas hydrophila infected Nile tilapia (Oreochromis niloticus) using Ah03 and Ah04 virulent bacteriophages isolates. Saudi J Biol Sci 2022. [DOI: 10.1016/j.sjbs.2022.02.050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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Pereira C, Duarte J, Costa P, Braz M, Almeida A. Bacteriophages in the Control of Aeromonas sp. in Aquaculture Systems: An Integrative View. Antibiotics (Basel) 2022; 11:163. [PMID: 35203766 PMCID: PMC8868336 DOI: 10.3390/antibiotics11020163] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Revised: 01/23/2022] [Accepted: 01/24/2022] [Indexed: 11/17/2022] Open
Abstract
Aeromonas species often cause disease in farmed fish and are responsible for causing significant economic losses worldwide. Although vaccination is the ideal method to prevent infectious diseases, there are still very few vaccines commercially available in the aquaculture field. Currently, aquaculture production relies heavily on antibiotics, contributing to the global issue of the emergence of antimicrobial-resistant bacteria and resistance genes. Therefore, it is essential to develop effective alternatives to antibiotics to reduce their use in aquaculture systems. Bacteriophage (or phage) therapy is a promising approach to control pathogenic bacteria in farmed fish that requires a heavy understanding of certain factors such as the selection of phages, the multiplicity of infection that produces the best bacterial inactivation, bacterial resistance, safety, the host’s immune response, administration route, phage stability and influence. This review focuses on the need to advance phage therapy research in aquaculture, its efficiency as an antimicrobial strategy and the critical aspects to successfully apply this therapy to control Aeromonas infection in fish.
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Ramos-Vivas J, Superio J, Galindo-Villegas J, Acosta F. Phage Therapy as a Focused Management Strategy in Aquaculture. Int J Mol Sci 2021; 22:10436. [PMID: 34638776 PMCID: PMC8508683 DOI: 10.3390/ijms221910436] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Revised: 09/22/2021] [Accepted: 09/23/2021] [Indexed: 12/12/2022] Open
Abstract
Therapeutic bacteriophages, commonly called as phages, are a promising potential alternative to antibiotics in the management of bacterial infections of a wide range of organisms including cultured fish. Their natural immunogenicity often induces the modulation of a variated collection of immune responses within several types of immunocytes while promoting specific mechanisms of bacterial clearance. However, to achieve standardized treatments at the practical level and avoid possible side effects in cultivated fish, several improvements in the understanding of their biology and the associated genomes are required. Interestingly, a particular feature with therapeutic potential among all phages is the production of lytic enzymes. The use of such enzymes against human and livestock pathogens has already provided in vitro and in vivo promissory results. So far, the best-understood phages utilized to fight against either Gram-negative or Gram-positive bacterial species in fish culture are mainly restricted to the Myoviridae and Podoviridae, and the Siphoviridae, respectively. However, the current functional use of phages against bacterial pathogens of cultured fish is still in its infancy. Based on the available data, in this review, we summarize the current knowledge about phage, identify gaps, and provide insights into the possible bacterial control strategies they might represent for managing aquaculture-related bacterial diseases.
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Affiliation(s)
- José Ramos-Vivas
- Grupo de Investigación en Acuicultura, Universidad de Las Palmas de Gran Canaria, 35214 Las Palmas de Gran Canaria, Spain; (J.R.-V.); (F.A.)
- Research Group on Foods, Nutritional Biochemistry and Health, Universidad Europea del Atlántico, 39011 Santander, Spain
- Department of Project Management, Universidad Internacional Iberoamericana, Campeche 24560, Mexico
| | - Joshua Superio
- Faculty of Biosciences and Aquaculture, Nord University, 8049 Bodø, Norway;
| | | | - Félix Acosta
- Grupo de Investigación en Acuicultura, Universidad de Las Palmas de Gran Canaria, 35214 Las Palmas de Gran Canaria, Spain; (J.R.-V.); (F.A.)
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Zhang J, Xu H, Yang H, Li J, Xiao S, Hu S, Yan F, Xia L, Zhang Y. Screening of a Plesiomonas shigelloides phage and study of the activity of its lysis system. Virus Res 2021; 306:198581. [PMID: 34560184 DOI: 10.1016/j.virusres.2021.198581] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [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: 06/30/2021] [Revised: 09/06/2021] [Accepted: 09/13/2021] [Indexed: 10/20/2022]
Abstract
Plesiomonas shigelloides is an important fish pathogen that causes significant losses in aquaculture. Phage therapy is a new approach to overcome the problem of multidrug-resistant bacteria. Herein, a virulent phage of P. shigelloides was isolated from the intestines of grass carp. This phage belongs to the Siphoviridae family and was designated PSP01. The optimal multiplicity of infection of PSP01 was 1 with a latent period of 30 min and a lytic period of 140 min. Good activity was observed over a wide range of temperatures (-20 °C-50 °C), pH values (3-12), and NaCl concentrations (0.1-3.5%). The phage PSP01 lysis cassette is composed of 3 genes, HolPSP, LysPSP-1 and LysPSP-2. Expression of HolPSP or LysPSP-2 in Escherichia coli resulted in bacterial lysis, and a synergistic effect was observed when the HolPSP and LysPSP-1 proteins were co-expressed. In-frame deletion uncovered an important role of the transmembrane domain (TMD) in HolPSP and the signal peptide (SP) in LysPSP-2 for bacterial lysis function. The protective effects of phage PSP01 were investigated by intraperitoneal injection into grass carp infected with P. shigelloides, showing a 33.3% increase in the survival rate of the infected grass carp. Pathological analysis of the spleens from the infected grass carp revealed alleviation of the pathological symptoms. In conclusion, isolation and bacterial lysis investigations of phage PSP01 provide a new tool for the control of fish pathogens and possesses potential for aquaculture applications.
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Affiliation(s)
- Jingdan Zhang
- State Key Laboratory of Developmental Biology of Freshwater Fishes, Hunan Provincial Key Laboratory of Microbial Molecular Biology, College of Life Science, Hunan Normal University, Changsha, China
| | - Huizhong Xu
- State Key Laboratory of Developmental Biology of Freshwater Fishes, Hunan Provincial Key Laboratory of Microbial Molecular Biology, College of Life Science, Hunan Normal University, Changsha, China
| | - Hu Yang
- State Key Laboratory of Developmental Biology of Freshwater Fishes, Hunan Provincial Key Laboratory of Microbial Molecular Biology, College of Life Science, Hunan Normal University, Changsha, China
| | - Jia Li
- State Key Laboratory of Developmental Biology of Freshwater Fishes, Hunan Provincial Key Laboratory of Microbial Molecular Biology, College of Life Science, Hunan Normal University, Changsha, China
| | - Shuai Xiao
- State Key Laboratory of Developmental Biology of Freshwater Fishes, Hunan Provincial Key Laboratory of Microbial Molecular Biology, College of Life Science, Hunan Normal University, Changsha, China
| | - Shengbiao Hu
- State Key Laboratory of Developmental Biology of Freshwater Fishes, Hunan Provincial Key Laboratory of Microbial Molecular Biology, College of Life Science, Hunan Normal University, Changsha, China
| | - Fu Yan
- Helmholtz International Lab for Anti-Infectives, Shandong University-Helmholtz Institute of Biotechnology, State Key Laboratory of Microbial Technology, Shandong University, Qingdao, 266237, China
| | - Liqiu Xia
- State Key Laboratory of Developmental Biology of Freshwater Fishes, Hunan Provincial Key Laboratory of Microbial Molecular Biology, College of Life Science, Hunan Normal University, Changsha, China.
| | - Youming Zhang
- Helmholtz International Lab for Anti-Infectives, Shandong University-Helmholtz Institute of Biotechnology, State Key Laboratory of Microbial Technology, Shandong University, Qingdao, 266237, China.
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Dien LT, Ky LB, Huy BT, Mursalim MF, Kayansamruaj P, Senapin S, Rodkhum C, Dong HT. Characterization and protective effects of lytic bacteriophage pAh6.2TG against a pathogenic multidrug-resistant Aeromonas hydrophila in Nile tilapia (Oreochromis niloticus). Transbound Emerg Dis 2021; 69:e435-e450. [PMID: 34514728 DOI: 10.1111/tbed.14321] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [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: 06/05/2021] [Revised: 08/25/2021] [Accepted: 09/08/2021] [Indexed: 12/21/2022]
Abstract
Bacteriophage (phage) is considered as one of the alternatives to antibiotics and an environmentally friendly approach to tackle antimicrobial resistance (AMR) in aquaculture. Here, we reported isolation, morphology and genomic characterizations of a newly isolated lytic phage, designated pAh6.2TG. Host range and stability of pAh6.2TG in different environmental conditions, and protective efficacy against a pathogenic multidrug-resistant (MDR) Aeromonas hydrophila in Nile tilapia were subsequently evaluated. The results showed that pAh6.2TG is a member of the new family Chaseviridae which has genome size of 51,780 bp, encoding 65 putative open reading frames (ORFs) and is most closely related to Aeromonas phage PVN02 (99.33% nucleotide identity). The pAh6.2TG was highly specific to A. hydrophila and infected 83.3% tested strains of MDR A. hydrophila (10 out of 12) with relative stability at pH 7-9, temperature 0-40°C and salinity 0-40 ppt. In experimental challenge, pAh6.2TG treatments significantly improved survivability of Nile tilapia exposed to a lethal dose of the pathogenic MDR A. hydrophila, with relative per cent survival (RPS) of 73.3% and 50% for phage multiplicity of infection (MOI) 1.0 and 0.1, respectively. Phage treatment significantly reduced the concentration of A. hydrophila in both water and fish body. Interestingly, the surviving fish from A. hydrophila challenged groups provoked specific antibody (IgM) against this bacterium. In summary, the findings suggested that the lytic phage pAh6.2TG is an effective alternative to antibiotics to control MDR A. hydrophila in tilapia and possibly other freshwater fish.
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Affiliation(s)
- Le Thanh Dien
- Faculty of Veterinary Science, Center of Excellent in Fish Infectious Diseases (CEFID), Department of Veterinary Microbiology, Chulalongkorn University, Bangkok, Thailand.,Faculty of Veterinary Science, The International Graduate Program of Veterinary Science and Technology (VST), Chulalongkorn University, Bangkok, Thailand.,Faculty of Technology, Van Lang University, Ho Chi Minh City, Vietnam.,Faculty of Agriculture and Food Technology, Department of Biotechnology and Plant Protection, Tien Giang University, Tien Giang, Vietnam
| | - Le Buu Ky
- Faculty of Agriculture and Food Technology, Department of Biotechnology and Plant Protection, Tien Giang University, Tien Giang, Vietnam
| | - Bui The Huy
- Faculty of Agriculture and Food Technology, Department of Biotechnology and Plant Protection, Tien Giang University, Tien Giang, Vietnam
| | - Muhammad Fadhlullah Mursalim
- Faculty of Veterinary Science, Center of Excellent in Fish Infectious Diseases (CEFID), Department of Veterinary Microbiology, Chulalongkorn University, Bangkok, Thailand.,Faculty of Veterinary Science, The International Graduate Program of Veterinary Science and Technology (VST), Chulalongkorn University, Bangkok, Thailand.,Faculty of Medicine, Veterinary Study Program, Hasanuddin University, Makassar, Indonesia
| | - Pattanapon Kayansamruaj
- Faculty of Fisheries, Center of Excellence in Aquatic Animal Health Management, Kasetsart University, Bangkok, Thailand.,Faculty of Fisheries, Department of Aquaculture, Kasetsart University, Bangkok, Thailand
| | - Saengchan Senapin
- National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), Pathum Thani, Thailand.,Faculty of Science, Fish Health Platform, Center of Excellence for Shrimp Molecular Biology and Biotechnology (Centex Shrimp), Mahidol University, Bangkok, Thailand
| | - Channarong Rodkhum
- Faculty of Veterinary Science, Center of Excellent in Fish Infectious Diseases (CEFID), Department of Veterinary Microbiology, Chulalongkorn University, Bangkok, Thailand
| | - Ha Thanh Dong
- School of Environment, Resources and Development, Department of Food, Agriculture and Bioresources, Asian Institute of Technology, Pathum Thani, Thailand
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Islam MS, Yang X, Euler CW, Han X, Liu J, Hossen MI, Zhou Y, Li J. Application of a novel phage ZPAH7 for controlling multidrug-resistant Aeromonas hydrophila on lettuce and reducing biofilms. Food Control 2021. [DOI: 10.1016/j.foodcont.2020.107785] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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13
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Pallavi B, Puneeth TG, Shekar M, Girisha SK. Isolation, characterization and genomic analysis of vB-AhyM-AP1, a lytic bacteriophage infecting Aeromonas hydrophila. J Appl Microbiol 2021; 131:695-705. [PMID: 33420733 DOI: 10.1111/jam.14997] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [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: 10/15/2020] [Revised: 12/28/2020] [Accepted: 01/04/2021] [Indexed: 12/11/2022]
Abstract
AIMS Aeromonas hydrophila is a zoonotic pathogen displaying resistance to multiple antibiotics. Here, we aim to develop a candidate biocontrol agent against A. hydrophila. METHODS AND RESULTS In this study, we isolated and characterized the phage vB-AhyM-AP1 from sewage. It showed lytic activity against A. hydrophila strains. One-step growth curve revealed that the latent period lasted for 40 min. The burst size of one lytic cycle was 1413 PFU per infected cell. Temperature stability studies showed that the phage vB-AhyM-AP1 was active over temperatures ranging from 4 to 45°C for 1 h. pH stability studies indicated that the phage remained active within a pH range of 5-10 after 24 h of incubation. Stability tests in salt solutions showed that the phage was stable at salinities ranging from 0·1 to 2%. The phage also showed stabilities in organic solvents when incubated for 10 min. The Illumina Hiseq sequencing of its genome indicated that the phage vB-AhyM-AP1was a jumbo phage with a genome size of 2, 54 490 bp and GC content of 40·3%. The phylogenetic analysis of the terminase large subunit and major capsid protein indicated that the phage closely clustered with other Tevenvirinae phages. The genome encoded 455 ORFs and 22 tRNAs. The phage resulted in a reduction of 0·8 log units of viable A. hydrophila cells in biofilms grown on PVC coupons maintained in a low nutrient medium for 10 days. CONCLUSIONS The phage showed lytic activity against planktonic and biofilm cells of A. hydrophila. Genome-based prediction showed it to be a strictly lytic phage without any virulence or antibiotic resistance genes indicating safety for environmental and clinical applications. SIGNIFICANCE AND IMPACT OF THE STUDY The multidrug-resistant strains of A. hydrophila pose a significant health risk to both cultured fishes and consumers leaving few options for treatment. Phage vB-AhyM-AP1 may be used as a candidate biocontrol agent against A. hydrophila strains.
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Affiliation(s)
- B Pallavi
- Department of Aquatic Animal Health Management, Karnataka Veterinary, Animal and Fisheries Sciences, University, College of Fisheries, Mangalore, India
| | - T G Puneeth
- Department of Aquatic Animal Health Management, Karnataka Veterinary, Animal and Fisheries Sciences, University, College of Fisheries, Mangalore, India
| | - M Shekar
- Department of Aquatic Animal Health Management, Karnataka Veterinary, Animal and Fisheries Sciences, University, College of Fisheries, Mangalore, India
| | - S K Girisha
- Department of Aquatic Animal Health Management, Karnataka Veterinary, Animal and Fisheries Sciences, University, College of Fisheries, Mangalore, India
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14
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Cheng Y, Gao D, Xia Y, Wang Z, Bai M, Luo K, Cui X, Wang Y, Zhang S, Xiao W. Characterization of Novel Bacteriophage AhyVDH1 and Its Lytic Activity Against Aeromonas hydrophila. Curr Microbiol 2021; 78:329-37. [PMID: 33175194 DOI: 10.1007/s00284-020-02279-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Accepted: 10/28/2020] [Indexed: 10/23/2022]
Abstract
Phage therapy is an alternative approach to overcome the problem of multidrug-resistant bacteria. Here, a novel bacteriophage AhyVDH1, which infects Aeromonas hydrophila 4572, was isolated and its morphology, one-step growth curve, lytic activity, stability under various conditions, and genome were investigated. Transmission electron microscopy revealed that AhyVDH1 has an icosahedral head 49 nm in diameter and a contractile tail 127 nm in length, suggesting that it belongs to the family Myoviridae. AhyVDH1 showed strong adsorption to the surface of A. hydrophila 4572 (90% in 10 min). The latent period of AhyVDH1 was shown to be 50 min, and the burst size was 274 plaque-forming unit/infected cell. AhyVDH1 was stable at 30 °C for 1 h and lost infectivity after20 min of heating at 60 °C. Infectivity remained unaffected at pH 6-7 for 1 h, while the bacteriophage was inactivated at pH < 4 or > 11. AhyVDH1 has a 39,175-bp genome, with a 58% G + C content and 59 open reading frames. BLAST analysis indicated that the genome sequence of phage AhyVDH1 was related to that of Aeromonas phage Ahp2. Both time and MOI-dependent in vitro A. hydrophila growth inhibition were observed with AhyVDH1.Re-growth of the host bacteria appeared about 12 h after treatment, suggesting its potential therapeutic value in treating A. hydrophila infections, but phage cocktails should be developed.
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15
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Easwaran M, De Zoysa M, Shin HJ. Application of phage therapy: Synergistic effect of phage EcSw (ΦEcSw) and antibiotic combination towards antibiotic-resistant Escherichia coli. Transbound Emerg Dis 2020; 67:2809-2817. [PMID: 32453904 DOI: 10.1111/tbed.13646] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2019] [Revised: 04/20/2020] [Accepted: 05/15/2020] [Indexed: 11/30/2022]
Abstract
Bacteriophage therapy is acknowledged as a potential tool to prevent or treat multidrug-resistant bacterial infections. In this study, our major focus was on the bacteriolytic activity of phage EcSw (ΦEcSw) against the emergence of the clinically important Escherichia coli Sw1 and E. coli O157:H7. The amount of the antibiotics was changed in a concentration-dependent manner, and the ΦEcSw susceptibility to antibiotics was determined. The kanamycin and chloramphenicol inhibited the titre of phage, but ampicillin did not show phage inhibition. Though the kanamycin and chloramphenicol controlled the growth of Sw1 in a concentration-dependent manner, the ampicillin did not due to the resistance. The combined activity of the ΦEcSw with antibiotics (kanamycin and chloramphenicol) compared with the antibiotics alone showed significant lytic activity p < .001). In addition, phage-based therapy was evaluated for controlling the multidrug-resistant E. coli Sw1 and E. coli O157:H7 in zebrafish and BALB/c mice, respectively. Our results provide novel advantages of phage therapy and phage-antibiotic therapy to control antibiotic-resistant bacteria.
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Affiliation(s)
- Maheswaran Easwaran
- College of Veterinary Medicine, Chungnam National University, Daejeon, Korea
| | - Mahanama De Zoysa
- College of Veterinary Medicine, Chungnam National University, Daejeon, Korea
- Research Institute of Veterinary Medicine, Chungnam National University, Daejeon, Korea
| | - Hyun-Jin Shin
- College of Veterinary Medicine, Chungnam National University, Daejeon, Korea
- Research Institute of Veterinary Medicine, Chungnam National University, Daejeon, Korea
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16
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Madurantakam Royam M, Nachimuthu R. Isolation, characterization, and efficacy of bacteriophages isolated against Citrobacter spp. an in vivo approach in a zebrafish model (Danio rerio). Res Microbiol 2020; 171:341-50. [PMID: 32919052 DOI: 10.1016/j.resmic.2020.08.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Revised: 08/27/2020] [Accepted: 08/28/2020] [Indexed: 12/14/2022]
Abstract
Citrobacter infections are becoming an increasingly significant health problem in aquaculture in South-Eastern countries. The objective of this study was to isolate and evaluate the potential of lytic bacteriophages against Citrobacter infections. TEM analysis revealed that the isolated phages Citrophage MRM19 and Citrophage MRM57 were identified to be Siphovirus and Podovirus family of the order Caudovirales. The phage life-cycle studies showed that Citrophage MRM19 had an adsorption time of 18 ± 1 min and a latency period of 25 ± 3 min with burst size of 110 ± 20 phages/infected cell and Citrophage MRM57 had an adsorption time of 15 ± 1 min and a latency period of 25 ± 2 min with burst size of 50 ± 5 phages/infected cell. In vitro studies indicated that the bacterial load was reduced by 5 and 7 log units within 12 h by Citrophage MRM19 and Citrophage MRM57. The in vivo efficacy of the phages was studied using zebrafish (Danio rerio) as a model organism in low-scale tanks. The study unveiled that the use of phages increased the survival up to 17%, 23%, and 26% in the case of Citrophage MRM19, Citrophage MRM57, and phage cocktail treatment, respectively. Our study indicated that bacteriophages are suitable biocontrol agents against Citrobacter spp. especially in aquaculture industry.
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17
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Liu J, Gao S, Dong Y, Lu C, Liu Y. Isolation and characterization of bacteriophages against virulent Aeromonas hydrophila. BMC Microbiol 2020; 20:141. [PMID: 32487015 PMCID: PMC7268745 DOI: 10.1186/s12866-020-01811-w] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [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: 01/14/2020] [Accepted: 05/04/2020] [Indexed: 12/15/2022] Open
Abstract
Background Aeromonas hydrophila is an important water-borne pathogen that leads to a great economic loss in aquaculture. Along with the abuse of antibiotics, drug-resistant strains rise rapidly. In addition, the biofilms formed by this bacterium limited the antibacterial effect of antibiotics. Bacteriophages have been attracting increasing attention as a potential alternative to antibiotics against bacterial infections. Results Five phages against pathogenic A. hydrophila, named N21, W3, G65, Y71 and Y81, were isolated. Morphological analysis by transmission electron microscopy revealed that phages N21, W3 and G65 belong to the family Myoviridae, while Y71 and Y81 belong to the Podoviridae. These phages were found to have broad host spectra, short latent periods and normal burst sizes. They were sensitive to high temperature but had a wide adaptability to the pH. In addition, the phages G65 and Y81 showed considerable bacterial killing effect and potential in preventing formation of A. hydrophila biofilm; and the phages G65, W3 and N21 were able to scavenge mature biofilm effectively. Phage treatments applied to the pathogenic A. hydrophila in mice model resulted in a significantly decreased bacterial loads in tissues. Conclusions Five A. hydrophila phages were isolated with broad host ranges, low latent periods, and wide pH and thermal tolerance. And the phages exhibited varying abilities in controlling A. hydrophila infection. This work presents promising data supporting the future use of phage therapy.
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Affiliation(s)
- Jin Liu
- Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China
| | - Shanshan Gao
- Sucheng District Animal Husbandry and Veterinary Station, Suqian, 223800, China
| | - Yuhao Dong
- Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China
| | - Chengping Lu
- Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China
| | - Yongjie Liu
- Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, 210095, China.
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18
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Akmal M, Rahimi-Midani A, Hafeez-Ur-Rehman M, Hussain A, Choi TJ. Isolation, Characterization, and Application of a Bacteriophage Infecting the Fish Pathogen Aeromonas hydrophila. Pathogens 2020; 9:E215. [PMID: 32183136 DOI: 10.3390/pathogens9030215] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Revised: 03/10/2020] [Accepted: 03/11/2020] [Indexed: 12/18/2022] Open
Abstract
Bacteriophages are increasingly being used as biological control agents against pathogenic bacteria. In the present study, we isolate and characterize bacteriophage Akh-2 from Geoje Island, South Korea, to evaluate its utility in controlling motile Aeromonas septicemia. Akh-2 lysed four of the seven Aeromonas hydrophila strains tested. Transmission electron microscopy analysis showed that Akh-2 belongs to the Siphoviridae family, with head and tail sizes of 50 ± 5 and 170 ± 5 nm, respectively. One-step growth curve analysis revealed that the phage has a latent period of 50 ± 5 min and a burst size of 139 ± 5 plaque-forming units per infected cell. The phage appeared stable in a pH range of 6–8 and a temperature range of −80 to 46 °C. Based on next-generation sequencing analysis, its genome is 114,901 bp in size, with a 44.22% G + C content and 254 open reading frames. During an artificial induction of the disease, loach (Misgurnus anguillicaudatus) treated with Akh-2 showed an increased survival rate and time compared with the non-treated control. Our results suggest that Akh-2 is a potential biological agent for the treatment of Aeromonas infections in fish.
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19
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Chandrarathna HPSU, Nikapitiya C, Dananjaya SHS, De Silva BCJ, Heo GJ, De Zoysa M, Lee J. Isolation and characterization of phage AHP-1 and its combined effect with chloramphenicol to control Aeromonas hydrophila. Braz J Microbiol 2019; 51:409-416. [PMID: 31691176 DOI: 10.1007/s42770-019-00178-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [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: 04/29/2019] [Accepted: 10/14/2019] [Indexed: 01/19/2023] Open
Abstract
To develop an alternative bio-control measure for multi-drug resistant pathogenic Aeromonas hydrophila, which causes motile Aeromonas septicemia in fish, novel virulent phage (AHP-1) was isolated from carp tissues. Morphological analysis by transmission electron microscopy revealed that AHP-1 belongs to Myoviridae family. AHP-1 displayed 81% of moderate adsorption by 25 min, and latent period of 40 min with burst size of 97 PFU mL-1 at an optimal multiplicity of infection (MOI) 0.1. AHP-1 was stable over a broad range of pH (4-11), temperature (4-50 °C), and salinity (0.1-3.5%). Both time and MOI dependent in vitro A. hydrophila growth inhibition was observed with AHP-1. AHP-1 (10 MOI) showed higher growth inhibition against A. hydrophila than chloramphenicol (5 μg mL-1), and combined treatment was more promising than individuals. Immune gene expression analysis of zebrafish upon continuous bath exposure to AHP-1 resulted significantly higher (il-6 and sod-1) or slight induction (tnf-α, il1-β, il-10, and cxcl-8a) than controls at beginning of the phage exposure, but those lowered to basal level by day 12 post-phage exposure. It suggests no adverse immune responses have occurred for the AHP-1 dose that used, and have potential for the phage therapy. Further detailed in vivo studies are needed to confirm the protective efficacy of newly isolated AHP-1 against A. hydrophila infection.
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Affiliation(s)
- H P S U Chandrarathna
- College of Veterinary Medicine, Chungnam National University, Yuseong-gu, Daejeon, 34134, Republic of Korea
| | - Chamilani Nikapitiya
- College of Veterinary Medicine, Chungnam National University, Yuseong-gu, Daejeon, 34134, Republic of Korea
| | - S H S Dananjaya
- College of Veterinary Medicine, Chungnam National University, Yuseong-gu, Daejeon, 34134, Republic of Korea
| | - B C J De Silva
- Veterinary Medical Center and College of Veterinary Medicine, Chungbuk National University, Cheongju, 28644, Republic of Korea
| | - Gang-Joon Heo
- Veterinary Medical Center and College of Veterinary Medicine, Chungbuk National University, Cheongju, 28644, Republic of Korea
| | - Mahanama De Zoysa
- College of Veterinary Medicine, Chungnam National University, Yuseong-gu, Daejeon, 34134, Republic of Korea.
| | - Jehee Lee
- Fish Vaccine Research Center, Jeju National University, Jeju-si, 63243, Jeju, Self-Governing Province, Republic of Korea. .,Department of Marine Life Sciences, Jeju National University, Jeju-si, 63243, Jeju, Self-Governing Province, Republic of Korea.
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20
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Paquet VE, Vincent AT, Moineau S, Charette SJ. Beyond the A-layer: adsorption of lipopolysaccharides and characterization of bacteriophage-insensitive mutants of Aeromonas salmonicida subsp. salmonicida. Mol Microbiol 2019; 112:667-677. [PMID: 31115938 DOI: 10.1111/mmi.14308] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/18/2019] [Indexed: 12/28/2022]
Abstract
Aeromonas salmonicida subsp. salmonicida is a fish pathogen that causes furunculosis. Antibiotherapy used to treat furunculosis in fish has led to resistance. Virulent phages are increasingly seen as alternatives or complementary treatments against furunculosis in aquaculture environments. For phage therapy to be successful, it is essential to study the natural mechanisms of phage resistance in A. salmonicida subsp. salmonicida. Here, we generated bacteriophage-insensitive mutants (BIMs) of A. salmonicida subsp. salmonicida, using a myophage with broad host range and characterized them. Phage plaques were different depending on whether the A-layer surface array protein was expressed or not. The genome analysis of the BIMs helped to identify mutations in genes involved in the biogenesis of lipopolysaccharides (LPS) and on an uncharacterized gene (ASA_1998). The characterization of the LPS profile and gene complementation assays identified LPS as a phage receptor and confirmed the involvement of the uncharacterized protein ASA_1998 in phage infection. In addition, we confirmed that the presence of an A-layer at the bacterial surface could act as protection against phages. This study brings new elements into our understanding of the phage adsorption to A. salmonicida subsp. salmonicida cells.
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Affiliation(s)
- Valérie E Paquet
- Institut de Biologie Intégrative et des Systèmes (IBIS), Université Laval, Quebec City, QC, G1V 0A6, Canada.,Département de biochimie, de microbiologie et de bio-informatique, Faculté des sciences et de génie, Université Laval, Quebec City, QC, G1V 0A6, Canada.,Centre de recherche de l'Institut universitaire de cardiologie et de pneumologie de Québec (IUCPQ), Quebec City, QC, G1V 4G5, Canada
| | | | - Sylvain Moineau
- Département de biochimie, de microbiologie et de bio-informatique, Faculté des sciences et de génie, Université Laval, Quebec City, QC, G1V 0A6, Canada.,Groupe de recherche en écologie buccale (GREB), Faculté de médecine dentaire, Université Laval, Quebec City, QC, G1V 0A6, Canada.,Félix d'Hérelle Reference Center for Bacterial Viruses, Université Laval, Quebec City, QC, G1V 0A6, Canada
| | - Steve J Charette
- Institut de Biologie Intégrative et des Systèmes (IBIS), Université Laval, Quebec City, QC, G1V 0A6, Canada.,Département de biochimie, de microbiologie et de bio-informatique, Faculté des sciences et de génie, Université Laval, Quebec City, QC, G1V 0A6, Canada.,Centre de recherche de l'Institut universitaire de cardiologie et de pneumologie de Québec (IUCPQ), Quebec City, QC, G1V 4G5, Canada
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21
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Cafora M, Deflorian G, Forti F, Ferrari L, Binelli G, Briani F, Ghisotti D, Pistocchi A. Phage therapy against Pseudomonas aeruginosa infections in a cystic fibrosis zebrafish model. Sci Rep 2019; 9:1527. [PMID: 30728389 PMCID: PMC6365511 DOI: 10.1038/s41598-018-37636-x] [Citation(s) in RCA: 81] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2018] [Accepted: 12/11/2018] [Indexed: 12/21/2022] Open
Abstract
Cystic fibrosis (CF) is a hereditary disease due to mutations in the CFTR gene and causes mortality in humans mainly due to respiratory infections caused by Pseudomonas aeruginosa. In a previous work we used phage therapy, which is a treatment with a mix of phages, to actively counteract acute P. aeruginosa infections in mice and Galleria mellonella larvae. In this work we apply phage therapy to the treatment of P. aeruginosa PAO1 infections in a CF zebrafish model. The structure of the CFTR channel is evolutionary conserved between fish and mammals and cftr-loss-of-function zebrafish embryos show a phenotype that recapitulates the human disease, in particular with destruction of the pancreas. We show that phage therapy is able to decrease lethality, bacterial burden, and the pro-inflammatory response caused by PAO1 infection. In addition, phage administration relieves the constitutive inflammatory state of CF embryos. To our knowledge, this is the first time that phage therapy is used to cure P. aeruginosa infections in a CF animal model. We also find that the curative effect against PAO1 infections is improved by combining phages and antibiotic treatments, opening a useful therapeutic approach that could reduce antibiotic doses and time of administration.
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Affiliation(s)
- Marco Cafora
- Dipartimento di Biotecnologie Mediche e Medicina Traslazionale, Università degli Studi di Milano - LITA, via Fratelli Cervi 93, 20090, Segrate, MI, Italy
| | - Gianluca Deflorian
- Istituto FIRC di Oncologia Molecolare - IFOM, Via Adamello 16, 20139, Milano, Italy
| | - Francesca Forti
- Dipartimento di Bioscienze, Università degli Studi di Milano, Via Celoria 26, 20133, Milano, Italy
| | - Laura Ferrari
- Istituto FIRC di Oncologia Molecolare - IFOM, Via Adamello 16, 20139, Milano, Italy
| | - Giorgio Binelli
- Dipartimento di Biotecnologie e Scienze della Vita, Università degli Studi dell'Insubria, Via J.H. Dunant 3, Varese, Italy
| | - Federica Briani
- Dipartimento di Bioscienze, Università degli Studi di Milano, Via Celoria 26, 20133, Milano, Italy
| | - Daniela Ghisotti
- Dipartimento di Bioscienze, Università degli Studi di Milano, Via Celoria 26, 20133, Milano, Italy
| | - Anna Pistocchi
- Dipartimento di Biotecnologie Mediche e Medicina Traslazionale, Università degli Studi di Milano - LITA, via Fratelli Cervi 93, 20090, Segrate, MI, Italy.
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22
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Chandrarathna HPSU, Nikapitiya C, Dananjaya SHS, Wijerathne CUB, Wimalasena SHMP, Kwun HJ, Heo GJ, Lee J, De Zoysa M. Outcome of co-infection with opportunistic and multidrug resistant Aeromonas hydrophila and A. veronii in zebrafish: Identification, characterization, pathogenicity and immune responses. Fish Shellfish Immunol 2018; 80:573-581. [PMID: 29964197 DOI: 10.1016/j.fsi.2018.06.049] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2018] [Revised: 06/17/2018] [Accepted: 06/27/2018] [Indexed: 05/04/2023]
Abstract
Fish can be potentially co-infected by two or more bacterial strains, which can make synergistic influence on the virulence of infection. In this study, two opportunistic and multidrug resistant Aeromonas strains were isolated from wounds of morbid zebrafish with typical deep skin lesions similar to Motile Aeromonas Septicemia. Isolates were genetically identified as A. hydrophila and A. veronii by 16 S rRNA sequencing and phylogenetic analysis. Both isolates were positive for virulent genes (aerA, lip, ser, exu gcaT) and selected phenotypic tests (DNase, protease, gelatinase, lipase, biofilm production and β-haemolysis). A. hydrophila and A. veronii had strong antibiotic resistance against ampicillin, tetracycline, nalidixic acid, kanamycin, erythromycin, clindamycin and trimethoprim-sulfamethoxazole. Histopathological studies revealed that co-infection causes severe necrosis and hypertrophy in the muscles, kidney and liver of zebrafish. Naturally co-infected zebrafish showed highly induced tnf-α, il-1β, il-6, il-12, ifn, ifn-γ, cxcl18 b and ccl34a.4 at transcription level compared to healthy fish, suggesting virulence factors may activate immune and inflammatory responses of zebrafish. Experimentally infected zebrafish showed significantly higher mortality under co-infection with A. hydrohila and A. veronii (87%), followed by individual challenge of A. hydrophila (72%) or A. veronii (67%) suggesting that virulence of A. hydrophila have greater pathogenicity than A. veronii during co-infection.
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Affiliation(s)
- H P S U Chandrarathna
- College of Veterinary Medicine, Chungnam National University, Yuseong-gu, Daejeon, 34134, Republic of Korea
| | - Chamilani Nikapitiya
- Department of Marine Life Sciences, School of Marine Biomedical Sciences, Jeju National University, Jeju Self-Governing Province, 63243, Republic of Korea; Fish Vaccine Research Center, Jeju National University, Jeju Self-Governing Province, 63243, Republic of Korea
| | - S H S Dananjaya
- College of Veterinary Medicine, Chungnam National University, Yuseong-gu, Daejeon, 34134, Republic of Korea
| | - C U B Wijerathne
- College of Veterinary Medicine, Chungnam National University, Yuseong-gu, Daejeon, 34134, Republic of Korea
| | - S H M P Wimalasena
- Veterinary Medical Center and College of Veterinary Medicine, Chungbuk National University, Cheongju, 28644, Republic of Korea
| | - Hyo Jung Kwun
- College of Veterinary Medicine, Chungnam National University, Yuseong-gu, Daejeon, 34134, Republic of Korea
| | - Gang-Joon Heo
- Veterinary Medical Center and College of Veterinary Medicine, Chungbuk National University, Cheongju, 28644, Republic of Korea
| | - Jehee Lee
- Department of Marine Life Sciences, School of Marine Biomedical Sciences, Jeju National University, Jeju Self-Governing Province, 63243, Republic of Korea; Fish Vaccine Research Center, Jeju National University, Jeju Self-Governing Province, 63243, Republic of Korea
| | - Mahanama De Zoysa
- College of Veterinary Medicine, Chungnam National University, Yuseong-gu, Daejeon, 34134, Republic of Korea; Fish Vaccine Research Center, Jeju National University, Jeju Self-Governing Province, 63243, Republic of Korea.
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