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Evseev PV, Sukhova AS, Tkachenko NA, Skryabin YP, Popova AV. Lytic Capsule-Specific Acinetobacter Bacteriophages Encoding Polysaccharide-Degrading Enzymes. Viruses 2024; 16:771. [PMID: 38793652 PMCID: PMC11126041 DOI: 10.3390/v16050771] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2024] [Revised: 05/09/2024] [Accepted: 05/10/2024] [Indexed: 05/26/2024] Open
Abstract
The genus Acinetobacter comprises both environmental and clinically relevant species associated with hospital-acquired infections. Among them, Acinetobacter baumannii is a critical priority bacterial pathogen, for which the research and development of new strategies for antimicrobial treatment are urgently needed. Acinetobacter spp. produce a variety of structurally diverse capsular polysaccharides (CPSs), which surround the bacterial cells with a thick protective layer. These surface structures are primary receptors for capsule-specific bacteriophages, that is, phages carrying tailspikes with CPS-depolymerizing/modifying activities. Phage tailspike proteins (TSPs) exhibit hydrolase, lyase, or esterase activities toward the corresponding CPSs of a certain structure. In this study, the data on all lytic capsule-specific phages infecting Acinetobacter spp. with genomes deposited in the NCBI GenBank database by January 2024 were summarized. Among the 149 identified TSPs encoded in the genomes of 143 phages, the capsular specificity (K specificity) of 46 proteins has been experimentally determined or predicted previously. The specificity of 63 TSPs toward CPSs, produced by various Acinetobacter K types, was predicted in this study using a bioinformatic analysis. A comprehensive phylogenetic analysis confirmed the prediction and revealed the possibility of the genetic exchange of gene regions corresponding to the CPS-recognizing/degrading parts of different TSPs between morphologically and taxonomically distant groups of capsule-specific Acinetobacter phages.
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Affiliation(s)
- Peter V. Evseev
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 117997 Moscow, Russia;
- State Research Center for Applied Microbiology and Biotechnology, City District Serpukhov, Moscow Region, 142279 Obolensk, Russia; (A.S.S.); (Y.P.S.)
- Pirogov Russian National Research Medical University, 117997 Moscow, Russia
| | - Anastasia S. Sukhova
- State Research Center for Applied Microbiology and Biotechnology, City District Serpukhov, Moscow Region, 142279 Obolensk, Russia; (A.S.S.); (Y.P.S.)
| | - Nikolay A. Tkachenko
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 117997 Moscow, Russia;
| | - Yuriy P. Skryabin
- State Research Center for Applied Microbiology and Biotechnology, City District Serpukhov, Moscow Region, 142279 Obolensk, Russia; (A.S.S.); (Y.P.S.)
| | - Anastasia V. Popova
- State Research Center for Applied Microbiology and Biotechnology, City District Serpukhov, Moscow Region, 142279 Obolensk, Russia; (A.S.S.); (Y.P.S.)
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Peters DL, Gaudreault F, Chen W. Functional domains of Acinetobacter bacteriophage tail fibers. Front Microbiol 2024; 15:1230997. [PMID: 38690360 PMCID: PMC11058221 DOI: 10.3389/fmicb.2024.1230997] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Accepted: 03/08/2024] [Indexed: 05/02/2024] Open
Abstract
A rapid increase in antimicrobial resistant bacterial infections around the world is causing a global health crisis. The Gram-negative bacterium Acinetobacter baumannii is categorized as a Priority 1 pathogen for research and development of new antimicrobials by the World Health Organization due to its numerous intrinsic antibiotic resistance mechanisms and ability to quickly acquire new resistance determinants. Specialized phage enzymes, called depolymerases, degrade the bacterial capsule polysaccharide layer and show therapeutic potential by sensitizing the bacterium to phages, select antibiotics, and serum killing. The functional domains responsible for the capsule degradation activity are often found in the tail fibers of select A. baumannii phages. To further explore the functional domains associated with depolymerase activity, tail-associated proteins of 71 sequenced and fully characterized phages were identified from published literature and analyzed for functional domains using InterProScan. Multisequence alignments and phylogenetic analyses were conducted on the domain groups and assessed in the context of noted halo formation or depolymerase characterization. Proteins derived from phages noted to have halo formation or a functional depolymerase, but no functional domain hits, were modeled with AlphaFold2 Multimer, and compared to other protein models using the DALI server. The domains associated with depolymerase function were pectin lyase-like (SSF51126), tailspike binding (cd20481), (Trans)glycosidases (SSF51445), and potentially SGNH hydrolases. These findings expand our knowledge on phage depolymerases, enabling researchers to better exploit these enzymes for therapeutic use in combating the antimicrobial resistance crisis.
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Affiliation(s)
- Danielle L. Peters
- Human Health Therapeutics (HHT) Research Center, National Research Council Canada, Ottawa, ON, Canada
| | | | - Wangxue Chen
- Human Health Therapeutics (HHT) Research Center, National Research Council Canada, Ottawa, ON, Canada
- Department of Biology, Brock University, St. Catharines, ON, Canada
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Kulshrestha M, Tiwari M, Tiwari V. Bacteriophage therapy against ESKAPE bacterial pathogens: Current status, strategies, challenges, and future scope. Microb Pathog 2024; 186:106467. [PMID: 38036110 DOI: 10.1016/j.micpath.2023.106467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Revised: 10/19/2023] [Accepted: 11/24/2023] [Indexed: 12/02/2023]
Abstract
The ESKAPE pathogens are the primary threat due to their constant spread of drug resistance worldwide. These pathogens are also regarded as opportunistic pathogens and could potentially cause nosocomial infections. Most of the ESKAPE pathogens have developed resistance to almost all the antibiotics that are used against them. Therefore, to deal with antimicrobial resistance, there is an urgent requirement for alternative non-antibiotic strategies to combat this rising issue of drug-resistant organisms. One of the promising alternatives to this scenario is implementing bacteriophage therapy. This under-explored mode of treatment in modern medicine has posed several concerns, such as preferable phages for the treatment, impact on the microbiome (or gut microflora), dose optimisation, safety, etc. The review will cover a rationale for phage therapy, clinical challenges, and propose phage therapy as an effective therapeutic against bacterial coinfections during pandemics. This review also addresses the expected uncertainties for administering the phage as a treatment against the ESKAPE pathogens and the advantages of using lytic phage over temperate, the immune response to phages, and phages in combinational therapies. The interaction between bacteria and bacteriophages in humans and countless animal models can also be used to design novel and futuristic therapeutics like personalised medicine or bacteriophages as anti-biofilm agents. Hence, this review explores different aspects of phage therapy and its potential to emerge as a frontline therapy against the ESKAPE bacterial pathogen.
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Affiliation(s)
- Mukta Kulshrestha
- Department of Biochemistry, Central University of Rajasthan, Ajmer, 305817, India
| | - Monalisa Tiwari
- Department of Biochemistry, Central University of Rajasthan, Ajmer, 305817, India
| | - Vishvanath Tiwari
- Department of Biochemistry, Central University of Rajasthan, Ajmer, 305817, India.
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Raees F, Harun A, Ahmed A, Deris ZZ. Potential Usefulness of Bacteriophages for the Treatment of Multidrug-Resistant Acinetobacter Infection. Malays J Med Sci 2023; 30:7-22. [PMID: 37928784 PMCID: PMC10624448 DOI: 10.21315/mjms2023.30.5.2] [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: 01/28/2022] [Accepted: 03/11/2022] [Indexed: 11/07/2023] Open
Abstract
Bacteriophages were discovered in early 20th century. However, the interest in bacteriophage research was reduced with the discovery of antibiotics. With the increasing number of infections due to multidrug-resistant (MDR) organisms, the potential usefulness of bacteriophages as therapeutic agents has been re-evaluated. In this review, we found that more than 30 lytic bacteriophages that infect Acinetobacter species have been characterised. These are mainly members of Caudovirales, with genome sizes ranging from 31 kb to 234 kb and G+C contents ranging from 33.5% to 45.5%. The host range can be as low as < 10% of all tested Acinetobacter strains. Fourteen published murine trials indicated positive outcomes in bacteriophage-treated groups. Only two case reports were pertaining to the use of bacteriophages in the treatment of Acinetobacter infections in humans; in both cases, the infections were resolved with bacteriophage therapy. The use of bacteriophages has been associated with reduced Acinetobacter burden in the environment, as shown in two studies. The major limitation of bacteriophage therapy is its highly selective host strain. In conclusion, the potential usefulness of bacteriophage therapy for the treatment of MDR Acinetobacter species has been documented only in limited studies and more research is needed prior to its extensive use in clinical practice.
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Affiliation(s)
- Fahad Raees
- Department of Medical Microbiology and Parasitology, School of Medical Sciences, Universiti Sains Malaysia, Kelantan, Malaysia
- Department of Microbiology, College of Medicine, Umm al-Qura University, Makkah, Kingdom of Saudi Arabia
| | - Azian Harun
- Department of Medical Microbiology and Parasitology, School of Medical Sciences, Universiti Sains Malaysia, Kelantan, Malaysia
- Hospital Universiti Sains Malaysia, Kelantan, Malaysia
| | - Abdalla Ahmed
- Department of Microbiology, College of Medicine, Umm al-Qura University, Makkah, Kingdom of Saudi Arabia
| | - Zakuan Zainy Deris
- Department of Medical Microbiology and Parasitology, School of Medical Sciences, Universiti Sains Malaysia, Kelantan, Malaysia
- Hospital Universiti Sains Malaysia, Kelantan, Malaysia
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Li Y, Xiao S, Huang G. Acinetobacter baumannii Bacteriophage: Progress in Isolation, Genome Sequencing, Preclinical Research, and Clinical Application. Curr Microbiol 2023; 80:199. [PMID: 37120784 PMCID: PMC10149043 DOI: 10.1007/s00284-023-03295-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Accepted: 04/02/2023] [Indexed: 05/01/2023]
Abstract
Acinetobacter baumannii (A. baumannii) is a common nosocomial pathogen associated with serious clinical challenges owing to its rapidly increasing resistance to antibiotics. Due to their high host specificity and easy access to the natural environment, bacteriophages (phages) may serve as good antibacterial agents. Phage therapy has been successfully used to treat antibiotic-resistant A. baumannii infections. As a fundamental step before phage therapy, the characterization and sequencing of A. baumannii phages have been well studied. Until October 2022, 132 A. baumannii phages have been sequenced and studied, with their genomes ranging from 4 to 234 kb, and we summarize the characterized and sequenced A. baumannii phages. This review is a current and short overview that does not go into detail on the A. baumannii phages. In addition, preclinical studies and clinical applications of A. baumannii phages are also included.
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Affiliation(s)
- Yanqi Li
- Department of Burns and Plastic Surgery, Affiliated Hospital of Zunyi Medical University, Zunyi, China
| | - Shune Xiao
- Department of Burns and Plastic Surgery, Affiliated Hospital of Zunyi Medical University, Zunyi, China.
| | - Guangtao Huang
- Department of Burns and Plastic Surgery, Affiliated Hospital of Zunyi Medical University, Zunyi, China.
- Department of Burn and Plastic Surgery, Shenzhen Institute of Translational Medicine, The First Affiliated Hospital of Shenzhen University, Shenzhen Second People's Hospital, Shenzhen, 518035, China.
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Abdelsattar AS, Eita MA, Hammouda ZK, Gouda SM, Hakim TA, Yakoup AY, Safwat A, El-Shibiny A. The Lytic Activity of Bacteriophage ZCSE9 against Salmonella enterica and Its Synergistic Effects with Kanamycin. Viruses 2023; 15:v15040912. [PMID: 37112892 PMCID: PMC10142335 DOI: 10.3390/v15040912] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Revised: 03/27/2023] [Accepted: 03/30/2023] [Indexed: 04/05/2023] Open
Abstract
Salmonella, the causative agent of several diseases in humans and animals, including salmonellosis, septicemia, typhoid fever, and fowl typhoid, poses a serious threat to global public health and food safety. Globally, reports of therapeutic failures are increasing because of the increase in bacterial antibiotic resistance. Thus, this work highlights the combined phage–antibiotic therapy as a promising approach to combating bacterial resistance. In this manner, the phage ZCSE9 was isolated, and the morphology, host infectivity, killing curve, combination with kanamycin, and genome analysis of this phage were all examined. Morphologically, phage ZCSE9 is a siphovirus with a relatively broad host range. In addition, the phage can tolerate high temperatures until 80 °C with one log reduction and a basic environment (pH 11) without a significant decline. Furthermore, the phage prevents bacterial growth in the planktonic state, according to the results of the time-killing curve. Moreover, using the phage at MOI 0.1 with kanamycin against five different Salmonella serotypes reduces the required antibiotics to inhibit the growth of the bacteria. Comparative genomics and phylogenetic analysis suggested that phage ZCSE9, along with its close relatives Salmonella phages vB_SenS_AG11 and wksl3, belongs to the genus Jerseyvirus. In conclusion, phage ZCSE9 and kanamycin form a robust heterologous antibacterial combination that enhances the effectiveness of a phage-only approach for combating Salmonella.
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Affiliation(s)
- Abdallah S. Abdelsattar
- Center for Microbiology and Phage Therapy, Zewail City of Science and Technology, Giza 12578, Egypt
| | - Mohamed Atef Eita
- Center for Microbiology and Phage Therapy, Zewail City of Science and Technology, Giza 12578, Egypt
| | - Zainab K. Hammouda
- Microbiology and Immunology Department, Faculty of Pharmacy, October University for Modern Sciences and Arts (MSA), Giza 11787, Egypt
| | - Shrouk Mohamed Gouda
- Center for Microbiology and Phage Therapy, Zewail City of Science and Technology, Giza 12578, Egypt
| | - Toka A. Hakim
- Center for Microbiology and Phage Therapy, Zewail City of Science and Technology, Giza 12578, Egypt
| | - Aghapy Yermans Yakoup
- Center for Microbiology and Phage Therapy, Zewail City of Science and Technology, Giza 12578, Egypt
| | - Anan Safwat
- Center for Microbiology and Phage Therapy, Zewail City of Science and Technology, Giza 12578, Egypt
| | - Ayman El-Shibiny
- Center for Microbiology and Phage Therapy, Zewail City of Science and Technology, Giza 12578, Egypt
- Faculty of Environmental Agricultural Sciences, Arish University, Arish 45511, Egypt
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Rotating Magnetic Field-Assisted Reactor Enhances Mechanisms of Phage Adsorption on Bacterial Cell Surface. Curr Issues Mol Biol 2022; 44:1316-1325. [PMID: 35723311 PMCID: PMC8947294 DOI: 10.3390/cimb44030088] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Revised: 03/14/2022] [Accepted: 03/15/2022] [Indexed: 12/14/2022] Open
Abstract
Growing interest in bacteriophage research and use, especially as an alternative treatment option for multidrug-resistant bacterial infection, requires rapid development of production methods and strengthening of bacteriophage activities. Bacteriophage adsorption to host cells initiates the process of infection. The rotating magnetic field (RMF) is a promising biotechnological method for process intensification, especially for the intensification of micromixing and mass transfer. This study evaluates the use of RMF to enhance the infection process by influencing bacteriophage adsorption rate. The RMF exposition decreased the t50 and t75 of bacteriophages T4 on Escherichia coli cells and vb_SauM_A phages on Staphylococcus aureus cells. The T4 phage adsorption rate increased from 3.13 × 10−9 mL × min−1 to 1.64 × 10−8 mL × min−1. The adsorption rate of vb_SauM_A phages exposed to RMF increased from 4.94 × 10−9 mL × min−1 to 7.34 × 10−9 mL × min−1. Additionally, the phage T4 zeta potential changed under RMF from −11.1 ± 0.49 mV to −7.66 ± 0.29 for unexposed and RMF-exposed bacteriophages, respectively.
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Sisakhtpour B, Mirzaei A, Karbasizadeh V, Hosseini N, Shabani M, Moghim S. The characteristic and potential therapeutic effect of isolated multidrug-resistant Acinetobacter baumannii lytic phage. Ann Clin Microbiol Antimicrob 2022; 21:1. [PMID: 34996464 PMCID: PMC8742398 DOI: 10.1186/s12941-022-00492-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2020] [Accepted: 01/03/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Widespread misuse of antibiotics caused bacterial resistance increasingly become a serious threat. Bacteriophage therapy promises alternative treatment strategies for combatting drug-resistant bacterial infections. In this study, we isolated and characterized a novel, potent lytic bacteriophage against multi-drug resistant (MDR) Acinetobacter baumannii and described the lytic capability and endolysin activity of the phage to evaluate the potential in phage therapy. METHODS A novel phage, pIsf-AB02, was isolated from hospital sewage. The morphological analysis, its host range, growth characteristics, stability under various conditions, genomic restriction pattern were systematically investigated. The protein pattern of the phage was analyzed, and the endolysin activity of the phage was determined under the non-denaturing condition on SDS-PAGE. The optimal lytic titer of phage was assessed by co-culture of the phage with clinical MDR A. baumannii isolates. Finally, HeLa cells were used to examine the safety of the phage. RESULTS The morphological analysis revealed that the pIsf-AB02 phage displays morphology resembling the Myoviridae family. It can quickly destroy 56.3% (27/48) of clinical MDR A. baumannii isolates. This virulent phage could decrease the bacterial host cells (from 108 CFU/ml to 103 CFU/ml) in 30 min. The optimum stability of the phage was observed at 37 °C. pH 7 is the most suitable condition to maintain phage stability. The 15 kDa protein encoded by pIsf-AB02 was detected to have endolysin activity. pIsf-AB02 did not show cytotoxicity to HeLa cells, and it can save HeLa cells from A. baumannii infection. CONCLUSION In this study, we isolated a novel lytic MDR A. baumannii bacteriophage, pIsf-AB02. This phage showed suitable stability at different temperatures and pHs, and demonstrated potent in vitro endolysin activity. pIsf-AB02 may be a good candidate as a therapeutic agent to control nosocomial infections caused by MDR A. baumannii.
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Affiliation(s)
- Behnam Sisakhtpour
- Department of Bacteriology and Virology, Faculty of Medicine, Isfahan University of Medical Sciences, 81744-176, Isfahan, Iran
| | - Arezoo Mirzaei
- Department of Bacteriology and Virology, Faculty of Medicine, Isfahan University of Medical Sciences, 81744-176, Isfahan, Iran
| | - Vajihe Karbasizadeh
- Department of Bacteriology and Virology, Faculty of Medicine, Isfahan University of Medical Sciences, 81744-176, Isfahan, Iran
| | - Nafiseh Hosseini
- Department of Bacteriology and Virology, Faculty of Medicine, Isfahan University of Medical Sciences, 81744-176, Isfahan, Iran
| | - Mehdi Shabani
- Department of Bacteriology and Virology, Faculty of Medicine, Isfahan University of Medical Sciences, 81744-176, Isfahan, Iran
| | - Sharareh Moghim
- Department of Bacteriology and Virology, Faculty of Medicine, Isfahan University of Medical Sciences, 81744-176, Isfahan, Iran.
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Jiang L, Tan J, Hao Y, Wang Q, Yan X, Wang D, Tuo L, Wei Z, Huang G. Isolation and Characterization of a Novel Myophage Abp9 Against Pandrug Resistant Acinetobacater baumannii. Front Microbiol 2020; 11:506068. [PMID: 33013774 PMCID: PMC7506109 DOI: 10.3389/fmicb.2020.506068] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2019] [Accepted: 08/12/2020] [Indexed: 01/10/2023] Open
Abstract
Acinetobacter baumannii (A. baumannii) has emerged as one of the most troublesome pathogens in health care institutions. A. baumannii can cause a wide range of diseases in humans, including pneumonia and septicemia. Phage therapy has drawn great interest from medical researchers as a potential way to control infections by antibiotic-resistant A. baumannii. Using a pandrug-resistant clinical A. baumannii isolate ABZY9 as an indicator, we isolated a lytic phage Abp9 from hospital sewage. Abp9 belongs to myoviridae family and shows a wider host range of 12%. Abp9 contains a linear double-stranded DNA genome of 44,820 bp with a G + C content of 37.69%. The Abp9 genome contains 80 open reading frames, but lacks any known virulence genes or lysogen-formation genes. In a systemic A. baumannii infection mouse models, Abp9 treatment showed good therapeutic effects. We have also observed an excellent lytic activity against A. baumannii in biofilm form of growth in vitro. All of these suggest that Abp9 is a good candidate for the phage therapy against drug-resistant A. baumannii infections.
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Affiliation(s)
- Lingli Jiang
- Department of Burn and Plastic, Affiliated Hospital of Zunyi Medical University, Zunyi, China
| | - Jingjie Tan
- Department of Burn and Plastic, Affiliated Hospital of Zunyi Medical University, Zunyi, China
| | - Yi Hao
- Department of Burn and Plastic, Affiliated Hospital of Zunyi Medical University, Zunyi, China
| | - Qi Wang
- Department of Burn and Plastic, Affiliated Hospital of Zunyi Medical University, Zunyi, China
| | - Xiaorui Yan
- Life Sciences Institute, Zunyi Medical University, Zunyi, China
| | - Dali Wang
- Department of Burn and Plastic, Affiliated Hospital of Zunyi Medical University, Zunyi, China
| | - Li Tuo
- Life Sciences Institute, Zunyi Medical University, Zunyi, China
| | - Zairong Wei
- Department of Burn and Plastic, Affiliated Hospital of Zunyi Medical University, Zunyi, China
| | - Guangtao Huang
- Department of Burn and Plastic, Affiliated Hospital of Zunyi Medical University, Zunyi, China
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Vukotic G, Obradovic M, Novovic K, Di Luca M, Jovcic B, Fira D, Neve H, Kojic M, McAuliffe O. Characterization, Antibiofilm, and Depolymerizing Activity of Two Phages Active on Carbapenem-Resistant Acinetobacter baumannii. Front Med (Lausanne) 2020; 7:426. [PMID: 32974360 PMCID: PMC7461965 DOI: 10.3389/fmed.2020.00426] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Accepted: 07/01/2020] [Indexed: 01/21/2023] Open
Abstract
Acinetobacter baumannii is a leading cause of healthcare-associated infections worldwide. Its various intrinsic and acquired mechanisms of antibiotic resistance make the therapeutic challenge even more serious. One of the promising alternative treatments that is increasingly highlighted is phage therapy, the therapeutic use of bacteriophages to treat bacterial infections. Two phages active against nosocomial carbapenem-resistant A. baumannii strain 6077/12, vB_AbaM_ISTD, and vB_AbaM_NOVI, were isolated from Belgrade wastewaters, purified, and concentrated using CsCl gradient ultracentrifugation. The phages were screened against 103 clinical isolates of A. baumannii from a laboratory collection and characterized based on plaque and virion morphology, host range, adsorption rate, and one-step growth curve. Given that phage ISTD showed a broader host range, better adsorption rate, shorter latent period, and larger burst size, its ability to lyse planktonic and biofilm-embedded cells was tested in detail. Phage ISTD yielded a 3.5- and 2-log reduction in planktonic and biofilm-associated viable bacterial cell count, respectively, but the effect was time-dependent. Both phages produced growing turbid halos around plaques indicating the synthesis of depolymerases, enzymes capable of degrading bacterial exopolysaccharides. Halos tested positive for presence of phages in the proximity of the plaque, but not further from the plaque, which indicates that the observed halo enlargement is a consequence of enzyme diffusion through the agar, independently of the phages. This notion was also supported by the growing halos induced by phage preparations applied on pregrown bacterial lawns, indicating that depolymerizing effect was achieved also on non-dividing sensitive cells. Overall, good rates of growth, fast adsorption rate, broad host range, and high depolymerizing activity, as well as antibacterial effectiveness against planktonic and biofilm-associated bacteria, make these phages good candidates for potential application in combating A. baumannii infections.
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Affiliation(s)
- Goran Vukotic
- Laboratory for Molecular Microbiology, Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Belgrade, Serbia.,Chair of Biochemistry and Molecular Biology, Faculty of Biology, University of Belgrade, Belgrade, Serbia
| | - Mina Obradovic
- Laboratory for Molecular Microbiology, Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Belgrade, Serbia
| | - Katarina Novovic
- Laboratory for Molecular Microbiology, Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Belgrade, Serbia
| | | | - Branko Jovcic
- Laboratory for Molecular Microbiology, Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Belgrade, Serbia.,Chair of Biochemistry and Molecular Biology, Faculty of Biology, University of Belgrade, Belgrade, Serbia
| | - Djordje Fira
- Chair of Biochemistry and Molecular Biology, Faculty of Biology, University of Belgrade, Belgrade, Serbia
| | - Horst Neve
- Department of Microbiology and Biotechnology, Max Rubner-Institut, Kiel, Germany
| | - Milan Kojic
- Laboratory for Molecular Microbiology, Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Belgrade, Serbia
| | - Olivia McAuliffe
- Department of Food Biosciences, Teagasc Food Research Centre, Fermoy, Ireland
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11
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Grygorcewicz B, Chajęcka‐Wierzchowska W, Augustyniak A, Wasak A, Stachurska X, Nawrotek P, Dołęgowska B. In‐milk inactivation of
Escherichia coli
O157:H7 by the environmental lytic bacteriophage ECPS‐6. J Food Saf 2020. [DOI: 10.1111/jfs.12747] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Bartłomiej Grygorcewicz
- Department of Microbiology, Immunology, and Laboratory MedicinePomeranian Medical University in Szczecin Szczecin Poland
| | | | - Adrian Augustyniak
- Building Materials and Construction ChemistryTechnische Universität Berlin Berlin Germany
| | - Agata Wasak
- Department of Immunology, Microbiology and Physiological ChemistryWest Pomeranian University of Technology Szczecin Poland
| | - Xymena Stachurska
- Department of Immunology, Microbiology and Physiological ChemistryWest Pomeranian University of Technology Szczecin Poland
| | - Paweł Nawrotek
- Department of Immunology, Microbiology and Physiological ChemistryWest Pomeranian University of Technology Szczecin Poland
| | - Barbara Dołęgowska
- Department of Microbiology, Immunology, and Laboratory MedicinePomeranian Medical University in Szczecin Szczecin Poland
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12
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Zhou W, Feng Y, Zong Z. Two New Lytic Bacteriophages of the Myoviridae Family Against Carbapenem-Resistant Acinetobacter baumannii. Front Microbiol 2018; 9:850. [PMID: 29760690 PMCID: PMC5936750 DOI: 10.3389/fmicb.2018.00850] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2018] [Accepted: 04/13/2018] [Indexed: 02/05/2023] Open
Abstract
Two lytic bacteriophages, WCHABP1 and WCHABP12, were recovered from hospital sewage and were able to infect 9 and 12 out of 18 carbapenem-resistant Acinetobacter baumannii clinical strains, which belonged to different clones. Electron microscopy scan showed that both bacteriophages had the similar morphology as those of the Myoviridae family. Whole genomic sequencing revealed 45.4- or 45.8-kb genome with a 37.6% GC content for WCHABP1 and WCHABP12, both of which showed significant DNA sequence similarity with bacteriophages of the Ap22virus genus within the Myoviridae family. Taxonomic analysis was therefore performed following the proposal approved by the International Committee on Taxonomy of Viruses, which confirmed that WCHABP1 and WCHABP12 represented two new species of the Ap22virus genus. No tRNAs but 88 and 89 open reading frames (ORFs) were predicted for the two bacteriophages, among which 22 and 21 had known function and encoded proteins for morphogenesis, packaging, lysis, and nucleiotide metabolism. The C-terminal amino acids of the large unit of fiber tail proteins varied between the bacteriophages, which may explain their different host ranges. For most lytic bacteriophages, a set of holin and endolysin are required for lysis. However, no known holin-encoding genes were identified in WCHABP1 and WCHABP12, suggesting that they may use alternative, yet-to-be-identified, novel holins for host cell membrane lysis. To test the efficacy of the bacteriophages in protecting against A. baumannii infection, a Galleria mellonella larva model was used. Only <20% G. mellonella larvae survived at 96 h after being infected by carbapenem-resistant A. baumannii strains, from which the two bacteriophages were recovered. With the administration of WCHABP1 and WCHABP12, the survival of larvae increased to 75%, while the treatment of polymyxin B only slightly increased the survival rate to 25%. The isolation of two new lytic bacteriophages in this study could expand our sight on Acinetobacter bacteriophages and may offer new potential therapeutic alternatives against A. baumannii.
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Affiliation(s)
- Weilong Zhou
- Center of Infectious Diseases, West China Hospital, Sichuan University, Chengdu, China.,Division of Infectious Diseases, State Key Laboratory of Biotherapy, Chengdu, China
| | - Yu Feng
- Center of Infectious Diseases, West China Hospital, Sichuan University, Chengdu, China.,Division of Infectious Diseases, State Key Laboratory of Biotherapy, Chengdu, China
| | - Zhiyong Zong
- Center of Infectious Diseases, West China Hospital, Sichuan University, Chengdu, China.,Division of Infectious Diseases, State Key Laboratory of Biotherapy, Chengdu, China.,Department of Infection Control, West China Hospital, Sichuan University, Chengdu, China.,Center for Pathogen Research, West China Hospital, Sichuan University, Chengdu, China
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13
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Turner D, Ackermann HW, Kropinski AM, Lavigne R, Sutton JM, Reynolds DM. Comparative Analysis of 37 Acinetobacter Bacteriophages. Viruses 2017; 10:E5. [PMID: 29295549 PMCID: PMC5795418 DOI: 10.3390/v10010005] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Revised: 12/21/2017] [Accepted: 12/22/2017] [Indexed: 02/07/2023] Open
Abstract
Members of the genus Acinetobacter are ubiquitous in the environment and the multiple-drug resistant species A. baumannii is of significant clinical concern. This clinical relevance is currently driving research on bacterial viruses infecting A. baumannii, in an effort to implement phage therapy and phage-derived antimicrobials. Initially, a total of 42 Acinetobacter phage genome sequences were available in the international nucleotide sequence databases, corresponding to a total of 2.87 Mbp of sequence information and representing all three families of the order Caudovirales and a single member of the Leviviridae. A comparative bioinformatics analysis of 37 Acinetobacter phages revealed that they form six discrete clusters and two singletons based on genomic organisation and nucleotide sequence identity. The assignment of these phages to clusters was further supported by proteomic relationships established using OrthoMCL. The 4067 proteins encoded by the 37 phage genomes formed 737 groups and 974 orphans. Notably, over half of the proteins encoded by the Acinetobacter phages are of unknown function. The comparative analysis and clustering presented enables an updated taxonomic framing of these clades.
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Affiliation(s)
- Dann Turner
- Department of Applied Sciences, Faculty of Health and Applied Sciences, University of the West of England, Coldharbour Lane, Bristol BS16 1QY, UK.
| | - Hans-Wolfgang Ackermann
- Faculty of Medicine, Department of Microbiology, Immunology and Infectiology, Université Laval, Quebec, QC G1X 46, Canada
| | - Andrew M Kropinski
- Departments of Food Science, Molecular and Cellular Biology; and Pathobiology, University of Guelph, Guelph, ON N1G 2W1, Canada.
| | - Rob Lavigne
- Laboratory of Gene Technology, KU Leuven, Kasteelpark Arenberg 21, box 2462, 3001 Leuven, Belgium.
| | - J Mark Sutton
- National Infections Service, Public Health England, Porton Down, Salisbury, Wiltshire SP4 0JG, UK.
| | - Darren M Reynolds
- Department of Applied Sciences, Faculty of Health and Applied Sciences, University of the West of England, Coldharbour Lane, Bristol BS16 1QY, UK.
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14
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Ghajavand H, Esfahani BN, Havaei A, Fazeli H, Jafari R, Moghim S. Isolation of bacteriophages against multidrug resistant Acinetobacter baumannii. Res Pharm Sci 2017; 12:373-380. [PMID: 28974975 PMCID: PMC5615867 DOI: 10.4103/1735-5362.213982] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
Increasing multiple drug resistant (MDR) strains of Acinetobacter baumannii has aggravated curiosity in development of alternative therapy. Bacteriophages are often considered as alternative agents for controlling A. baumannii infections. In the present study two lytic phages for MDR A. baumannii were isolated and their efficacy and host ranges were evaluated. The phages were isolated from hospital wastewater. Electron microscopy revealed that IsfAB78 might belong to Myoviridae and IsfAB39 to Podoviridae. Initial characterization of phages showed that they have narrow host range and failed to infect relative and non-relative bacteria. Both phages decreased the A. baumannii turbidity significantly, indicating that these isolated phages may be considered as candidates for phage therapy.
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Affiliation(s)
- Hasan Ghajavand
- Department of Microbiology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, I.R. Iran
| | - Bahram Nasr Esfahani
- Department of Microbiology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, I.R. Iran
| | - Asghar Havaei
- Department of Microbiology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, I.R. Iran
| | - Hossein Fazeli
- Department of Microbiology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, I.R. Iran
| | - Reyhaneh Jafari
- Department of Microbiology, School of Biology, Falavarjan Branch, Islamic Azad University, Isfahan, I.R. Iran
| | - Sharareh Moghim
- Department of Microbiology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, I.R. Iran
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In Vivo Application of Bacteriophage as a Potential Therapeutic Agent To Control OXA-66-Like Carbapenemase-Producing Acinetobacter baumannii Strains Belonging to Sequence Type 357. Appl Environ Microbiol 2016; 82:4200-4208. [PMID: 27208124 DOI: 10.1128/aem.00526-16] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2016] [Accepted: 04/29/2016] [Indexed: 01/21/2023] Open
Abstract
UNLABELLED The increasing prevalence of carbapenem-resistant Acinetobacter baumannii (CRAB) strains in intensive care units has caused major problems in public health worldwide. Our aim was to determine whether this phage could be used as an alternative therapeutic agent against multidrug-resistant bacterial strains, specifically CRAB clinical isolates, using a mouse model. Ten bacteriophages that caused lysis in CRAB strains, including blaOXA-66-like genes, were isolated. YMC13/01/C62 ABA BP (phage Bϕ-C62), which showed the strongest lysis activity, was chosen for further study by transmission electron microscopy (TEM), host range test, one-step growth and phage adsorption rate, thermal and pH stability, bacteriolytic activity test, genome sequencing and bioinformatics analysis, and therapeutic effect of phage using a mouse intranasal infection model. The phage Bϕ-C62 displayed high stability at various temperatures and pH values and strong cell lysis activity in vitro The phage Bϕ-C62 genome has a double-stranded linear DNA with a length of 44,844 bp, and known virulence genes were not identified in silico. In vivo study showed that all mice treated with phage Bϕ-C62 survived after intranasal bacterial challenge. Bacterial clearance in the lung was observed within 3 days after bacterial challenge, and histologic damage also improved significantly; moreover, no side effects were observed. IMPORTANCE In our study, the novel A. baumannii phage Bϕ-C62 was characterized and evaluated in vitro, in silico, and in vivo These results, including strong lytic activities and the improvement of survival rates, showed the therapeutic potential of the phage Bϕ-C62 as an antimicrobial agent. This study reports the potential of a novel phage as a therapeutic candidate or nontoxic disinfectant against CRAB clinical isolates in vitro and in vivo.
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Jeon J, D'Souza R, Pinto N, Ryu C, Park J, Yong D, Lee K. Characterization and complete genome sequence analysis of two
Myoviral
bacteriophages infecting clinical carbapenem‐resistant
Acinetobacter baumannii
isolates. J Appl Microbiol 2016; 121:68-77. [DOI: 10.1111/jam.13134] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2015] [Revised: 02/16/2016] [Accepted: 03/03/2016] [Indexed: 12/25/2022]
Affiliation(s)
- J. Jeon
- Department of Laboratory Medicine and Research Institute of Bacterial Resistance Yonsei University College of Medicine Seoul Korea
| | - R. D'Souza
- Department of Laboratory Medicine and Research Institute of Bacterial Resistance Yonsei University College of Medicine Seoul Korea
| | - N. Pinto
- Department of Laboratory Medicine and Research Institute of Bacterial Resistance Yonsei University College of Medicine Seoul Korea
| | - C.‐M. Ryu
- Molecular Phytobacteriology Laboratory KRIBB Daejeon Korea
- Biosystems and Bioengineering Program School of Science University of Science and Technology (UST) Daejeon Korea
| | - J. Park
- Laboratory Animal Medicine College of Veterinary Medicine Chonnam National University Gwang‐ju Korea
| | - D. Yong
- Department of Laboratory Medicine and Research Institute of Bacterial Resistance Yonsei University College of Medicine Seoul Korea
| | - K. Lee
- Department of Laboratory Medicine and Research Institute of Bacterial Resistance Yonsei University College of Medicine Seoul Korea
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Merabishvili M, Vandenheuvel D, Kropinski AM, Mast J, De Vos D, Verbeken G, Noben JP, Lavigne R, Vaneechoutte M, Pirnay JP. Characterization of newly isolated lytic bacteriophages active against Acinetobacter baumannii. PLoS One 2014; 9:e104853. [PMID: 25111143 PMCID: PMC4128745 DOI: 10.1371/journal.pone.0104853] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2014] [Accepted: 07/18/2014] [Indexed: 12/24/2022] Open
Abstract
Based on genotyping and host range, two newly isolated lytic bacteriophages, myovirus vB_AbaM_Acibel004 and podovirus vB_AbaP_Acibel007, active against Acinetobacter baumannii clinical strains, were selected from a new phage library for further characterization. The complete genomes of the two phages were analyzed. Both phages are characterized by broad host range and essential features of potential therapeutic phages, such as short latent period (27 and 21 min, respectively), high burst size (125 and 145, respectively), stability of activity in liquid culture and low frequency of occurrence of phage-resistant mutant bacterial cells. Genomic analysis showed that while Acibel004 represents a novel bacteriophage with resemblance to some unclassified Pseudomonas aeruginosa phages, Acibel007 belongs to the well-characterized genus of the Phikmvlikevirus. The newly isolated phages can serve as potential candidates for phage cocktails to control A. baumannii infections.
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Affiliation(s)
- Maia Merabishvili
- Laboratory for Molecular and Cellular Technology (LabMCT), Queen Astrid Military Hospital, Brussels, Belgium
- Eliava Institute of Bacteriophage, Microbiology and Virology, Tbilisi, Georgia
- Laboratory for Bacteriology Research (LBR), Faculty Medicine & Health Sciences, Ghent University, Ghent, Belgium
- * E-mail:
| | - Dieter Vandenheuvel
- Laboratory of Gene Technology, Faculty of Bioscience Engineering, Katholieke Universiteit Leuven, Leuven, Belgium
| | - Andrew M. Kropinski
- Laboratory for Foodborne Zoonoses, Public Health Agency of Canada, Guelph, Ontario, Canada
- Department of Molecular and Cellular Biology, University of Guelph, Guelph, Ontario, Canada
| | - Jan Mast
- Electron Microscopy Unit, Veterinary and Agrochemical Research Centre, Brussels, Belgium
| | - Daniel De Vos
- Laboratory for Molecular and Cellular Technology (LabMCT), Queen Astrid Military Hospital, Brussels, Belgium
| | - Gilbert Verbeken
- Laboratory for Molecular and Cellular Technology (LabMCT), Queen Astrid Military Hospital, Brussels, Belgium
| | - Jean-Paul Noben
- Department of Pathology, Bacteriology and Poultry Diseases, Ghent University, Merelbeke, Belgium
| | - Rob Lavigne
- Laboratory of Gene Technology, Faculty of Bioscience Engineering, Katholieke Universiteit Leuven, Leuven, Belgium
| | - Mario Vaneechoutte
- Laboratory for Bacteriology Research (LBR), Faculty Medicine & Health Sciences, Ghent University, Ghent, Belgium
| | - Jean-Paul Pirnay
- Laboratory for Molecular and Cellular Technology (LabMCT), Queen Astrid Military Hospital, Brussels, Belgium
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18
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Peng F, Mi Z, Huang Y, Yuan X, Niu W, Wang Y, Hua Y, Fan H, Bai C, Tong Y. Characterization, sequencing and comparative genomic analysis of vB_AbaM-IME-AB2, a novel lytic bacteriophage that infects multidrug-resistant Acinetobacter baumannii clinical isolates. BMC Microbiol 2014; 14:181. [PMID: 24996449 PMCID: PMC4094691 DOI: 10.1186/1471-2180-14-181] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2013] [Accepted: 06/25/2014] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND With the use of broad-spectrum antibiotics, immunosuppressive drugs, and glucocorticoids, multidrug-resistant Acinetobacter baumannii (MDR-AB) has become a major nosocomial pathogen species. The recent renaissance of bacteriophage therapy may provide new treatment strategies for combatting drug-resistant bacterial infections. In this study, we isolated a lytic bacteriophage vB_AbaM-IME-AB2 has a short latent period and a small burst size, which clear its host's suspension quickly, was selected for characterization and a complete genomic comparative study. RESULTS The isolated bacteriophage vB_AbaM-IME-AB2 has an icosahedral head and displays morphology resembling Myoviridae family. Gel separation assays showed that the phage particle contains at least nine protein bands with molecular weights ranging 15-100 kDa. vB_AbaM-IME-AB2 could adsorb its host cells in 9 min with an adsorption rate more than 99% and showed a short latent period (20 min) and a small burst size (62 pfu/cell). It could form clear plaques in the double-layer assay and clear its host's suspension in just 4 hours. Whole genome of vB_AbaM-IME-AB2 was sequenced and annotated and the results showed that its genome is a double-stranded DNA molecule consisting of 43,665 nucleotides. The genome has a G + C content of 37.5% and 82 putative coding sequences (CDSs). We compared the characteristics and complete genome sequence of all known Acinetobacter baumannii bacteriophages. There are only three that have been sequenced Acinetobacter baumannii phages AB1, AP22, and phiAC-1, which have a relatively high similarity and own a coverage of 65%, 50%, 8% respectively when compared with our phage vB_AbaM-IME-AB2. A nucleotide alignment of the four Acinetobacter baumannii phages showed that some CDSs are similar, with no significant rearrangements observed. Yet some sections of these strains of phage are nonhomologous. CONCLUSION vB_AbaM-IME-AB2 was a novel and unique A. baumannii bacteriophage. These findings suggest a common ancestry and microbial diversity and evolution. A clear understanding of its characteristics and genes is conducive to the treatment of multidrug-resistant A. baumannii in the future.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Changqing Bai
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing 100071, China.
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Kitti T, Thummeepak R, Thanwisai A, Boonyodying K, Kunthalert D, Ritvirool P, Sitthisak S. Characterization and Detection of Endolysin Gene from Three Acinetobacter baumannii Bacteriophages Isolated from Sewage Water. Indian J Microbiol 2014; 54:383-8. [PMID: 25320435 DOI: 10.1007/s12088-014-0472-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2013] [Accepted: 05/09/2014] [Indexed: 01/21/2023] Open
Abstract
Acinetobacter baumannii is an opportunistic pathogen that exists in hospital environments. The emergence of multidrug resistant A. baumannii (MDRAB) has been reported worldwide. It is necessary to find a novel and effective treatment for MDRAB infection. In this study, three bacteriophages, designated as ØABP-01, ØABP-02 and ØABP-04 were selected for analysis. Transmission electron microscopy showed that bacteriophage ØABP-01 belonged to the Podoviridae family and bacteriophage ØABP-02 and ØABP-04 are classified into the family Myoviridae. ØABP-01 had the widest host range. ØABP-01, ØABP-02 and ØABP-04 exhibited a latent period of 15, 20 and 20 min. The burst sizes of the three bacteriophages were 110, 120 and 150 PFU/cell. DNA restriction analysis using EcoRI, HindIII, PstI, SphI, BamHI and SmaI showed different DNA fragment patterns between the three bacteriophages. ØABP-01 and ØABP-04 was positive for the endolysin gene as determined by PCR. In conclusion, bacteriophage ØABP-01 showed broad host-specificity, good lytic activity and a short latency period, making it an appropriate candidate for studying the control and diagnosis associated with MDRAB infections.
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Affiliation(s)
- Thawatchai Kitti
- Faculty of Oriental Medicine, Chiang Rai College, Chiang Rai, Thailand
| | - Rapee Thummeepak
- Department of Microbiology and Parasitology, Faculty of Medical Science, Naresuan University, Phitsanulok, Thailand
| | - Aunchalee Thanwisai
- Department of Microbiology and Parasitology, Faculty of Medical Science, Naresuan University, Phitsanulok, Thailand ; Centre of Excellence in Medical Biotechnology, Faculty of Medical Science, Naresuan University, Phitsanulok, Thailand
| | - Kamala Boonyodying
- Department of Microbiology and Parasitology, Faculty of Medical Science, Naresuan University, Phitsanulok, Thailand
| | - Duangkamol Kunthalert
- Department of Microbiology and Parasitology, Faculty of Medical Science, Naresuan University, Phitsanulok, Thailand ; Centre of Excellence in Medical Biotechnology, Faculty of Medical Science, Naresuan University, Phitsanulok, Thailand
| | - Pannika Ritvirool
- Department of Microbiology and Parasitology, Faculty of Medical Science, Naresuan University, Phitsanulok, Thailand ; Centre of Excellence in Medical Biotechnology, Faculty of Medical Science, Naresuan University, Phitsanulok, Thailand
| | - Sutthirat Sitthisak
- Department of Microbiology and Parasitology, Faculty of Medical Science, Naresuan University, Phitsanulok, Thailand ; Centre of Excellence in Medical Biotechnology, Faculty of Medical Science, Naresuan University, Phitsanulok, Thailand
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20
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Emerging therapies for multidrug resistant Acinetobacter baumannii. Trends Microbiol 2013; 21:157-63. [PMID: 23317680 DOI: 10.1016/j.tim.2012.12.002] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2012] [Revised: 12/12/2012] [Accepted: 12/14/2012] [Indexed: 01/21/2023]
Abstract
The global emergence of multidrug resistant Acinetobacter baumannii has reduced the number of clinically available antibiotics that retain activity against this pathogen. For this reason, the development of novel prevention and treatment strategies for infections caused by A. baumannii is necessary. Several studies have begun to characterize nonantibiotic approaches that utilize novel mechanisms of action to achieve antibacterial activity. Recent advances in phage therapy, iron chelation therapy, antimicrobial peptides, prophylactic vaccination, photodynamic therapy, and nitric oxide (NO)-based therapies have all been shown to have activity against A. baumannii. However, before these approaches can be used clinically there are still limitations and remaining questions that must be addressed.
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21
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Complete genome sequence of the podoviral bacteriophage YMC/09/02/B1251 ABA BP, which causes the lysis of an OXA-23-producing carbapenem-resistant Acinetobacter baumannii isolate from a septic patient. J Virol 2013; 86:12437-8. [PMID: 23087105 DOI: 10.1128/jvi.02132-12] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The emergence of carbapenem-resistant Acinetobacter baumannii, responsible for causing nosocomial infections, has been becoming a significant global health issue. In this article, we report the complete genome sequence of bacteriophage B-B1251 (YMC/09/02/B1251 ABA BP), which causes lysis of a carbapenem-resistant A. baumannii strain. The bacteriophage belongs to the family Podoviridae and has a double-stranded circular DNA genome with a length of 45,364 bp and a 39.05% G+C content. Genome analysis showed that it had no similarity to other previously reported bacteriophages capable of infecting A. baumannii.
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Dubrovin EV, Popova AV, Kraevskiy SV, Ignatov SG, Ignatyuk TE, Yaminsky IV, Volozhantsev NV. Atomic force microscopy analysis of the Acinetobacter baumannii bacteriophage AP22 lytic cycle. PLoS One 2012; 7:e47348. [PMID: 23071792 PMCID: PMC3469531 DOI: 10.1371/journal.pone.0047348] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2012] [Accepted: 09/11/2012] [Indexed: 11/21/2022] Open
Abstract
Background Acinetobacter baumannii is known for its ability to develop resistance to the major groups of antibiotics, form biofilms, and survive for long periods in hospital environments. The prevalence of infections caused by multidrug-resistant A. baumannii is a significant problem for the modern health care system, and application of lytic bacteriophages for controlling this pathogen may become a solution. Methodology/Principal Findings In this study, using atomic force microscopy (AFM) and microbiological assessment we have investigated A. baumannii bacteriophage AP22, which has been recently described. AFM has revealed the morphology of bacteriophage AP22, adsorbed on the surfaces of mica, graphite and host bacterial cells. Besides, morphological changes of bacteriophage AP22-infected A. baumannii cells were characterized at different stages of the lytic cycle, from phage adsorption to the cell lysis. The phage latent period, estimated from AFM was in good agreement with that obtained by microbiological methods (40 min). Bacteriophage AP22, whose head diameter is 62±1 nm and tail length is 88±9 nm, was shown to disperse A. baumannii aggregates and adsorb to the bacterial surface right from the first minute of their mutual incubation at 37°C. Conclusions/Significance High rate of bacteriophage AP22 specific adsorption and its ability to disperse bacterial aggregates make this phage very promising for biomedical antimicrobial applications. Complementing microbiological results with AFM data, we demonstrate an effective approach, which allows not only comparing independently obtained characteristics of the lytic cycle but also visualizing the infection process.
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Affiliation(s)
- Evgeniy V. Dubrovin
- M.V. Lomonosov Moscow State University, Moscow, Russian Federation
- Advanced Technologies Center, Moscow, Russian Federation
- * E-mail:
| | - Anastasia V. Popova
- State Research Center for Applied Microbiology and Biotechnology, Obolensk, Russian Federation
| | - Sergey V. Kraevskiy
- Alikhanov Institute for Theoretical and Experimental Physics, Moscow, Russian Federation
| | - Sergei G. Ignatov
- State Research Center for Applied Microbiology and Biotechnology, Obolensk, Russian Federation
| | - Tatyana E. Ignatyuk
- Alikhanov Institute for Theoretical and Experimental Physics, Moscow, Russian Federation
| | - Igor V. Yaminsky
- M.V. Lomonosov Moscow State University, Moscow, Russian Federation
- Advanced Technologies Center, Moscow, Russian Federation
| | - Nikolay V. Volozhantsev
- State Research Center for Applied Microbiology and Biotechnology, Obolensk, Russian Federation
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Popova AV, Zhilenkov EL, Myakinina VP, Krasilnikova VM, Volozhantsev NV. Isolation and characterization of wide host range lytic bacteriophage AP22 infecting Acinetobacter baumannii. FEMS Microbiol Lett 2012; 332:40-6. [PMID: 22506502 DOI: 10.1111/j.1574-6968.2012.02573.x] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2011] [Revised: 04/11/2012] [Accepted: 04/11/2012] [Indexed: 01/21/2023] Open
Abstract
Acinetobacter baumannii plays a significant role in infecting patients admitted to hospitals. Many A. baumannii infections, including ventilation-associated pneumonia, wound, and bloodstream infections, are common for intensive care and burn units. The ability of the microorganism to acquire resistance to many antibiotics, disinfectants, and dehydration assures its long-term survival in hospital settings. The application of bacteriophages is a potential tool to control A. baumannii infections. Bacteriophage AP22 lytic for A. baumannii was isolated from clinical materials and classified as a member of the Myoviridae family. The phage had an icosahedral head of 64 nm in diameter and a contractile tail of 85-90 nm in length. According to restriction analysis, AP22 had 46-kb double-stranded DNA genome. The phage AP22 exhibited rapid adsorption (> 99% adsorbed in 5 min), a large burst size (240 PFU per cell), and stability to the wide range of pH. The bacteriophage was shown to specifically infect and lyse 68% (89 of 130) genotype-varying multidrug-resistant clinical A. baumannii strains by forming clear zones. Thus, it could be used as a candidate for making up phage cocktails to control A. baumannii-associated nosocomial infections.
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Affiliation(s)
- Anastasia V Popova
- State Research Center for Applied Microbiology & Biotechnology, Obolensk, Russia
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24
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Yele AB, Thawal ND, Sahu PK, Chopade BA. Novel lytic bacteriophage AB7-IBB1 of Acinetobacter baumannii: isolation, characterization and its effect on biofilm. Arch Virol 2012; 157:1441-50. [DOI: 10.1007/s00705-012-1320-0] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2011] [Accepted: 03/20/2012] [Indexed: 01/21/2023]
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