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Chepchumba B, Asudi GO, Katana J, Ngayo MO, Khayeli JA. Isolation of phages against Streptococcus species in the oral cavity for potential control of dental diseases and associated systemic complications. Arch Microbiol 2024; 206:175. [PMID: 38493441 DOI: 10.1007/s00203-024-03897-6] [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: 12/09/2023] [Revised: 02/07/2024] [Accepted: 02/12/2024] [Indexed: 03/19/2024]
Abstract
Dental infections and systemic complications caused by Streptococcus species in the oral cavity are increasingly exhibiting resistance to commonly used antibiotics, posing a potential threat to global public health. Phage therapy may offer a superior alternative, given that bacteriophages can be easily isolated and rapidly replicate in large numbers. In this study, six Streptococcus species from the oral cavity were characterized. Bacteriophages isolated from wastewater using five of these species as hosts produced plaques ranging from 0.2 to 2.4 mm in size. The phages demonstrated stability within a temperature range of 4 ℃ to 37 ℃. However, at temperatures exceeding 45 ℃, a noticeable reduction in bacteriophage titer was observed. Similarly, the phages showed greater stability within a pH range of 5 to 10. The isolated phages exhibited latency periods ranging from 15 to 20 min and had burst sizes varying from 10 to 200 viral particles. This study supports the potential use of bacteriophages in controlling infections caused by Streptococcus species.
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Affiliation(s)
- Beatrice Chepchumba
- Department of Biochemistry, Microbiology and Biotechnology, Kenyatta University, Nairobi, Kenya.
| | - George O Asudi
- Department of Biochemistry, Microbiology and Biotechnology, Kenyatta University, Nairobi, Kenya
| | - Japhet Katana
- Center for Microbiology Research, Kenya Medical Research Institute, Nairobi, Kenya
| | - Musa O Ngayo
- Center for Microbiology Research, Kenya Medical Research Institute, Nairobi, Kenya
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Bumunang EW, Zaheer R, Niu D, Narvaez-Bravo C, Alexander T, McAllister TA, Stanford K. Bacteriophages for the Targeted Control of Foodborne Pathogens. Foods 2023; 12:2734. [PMID: 37509826 PMCID: PMC10379335 DOI: 10.3390/foods12142734] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Revised: 07/05/2023] [Accepted: 07/14/2023] [Indexed: 07/30/2023] Open
Abstract
Foodborne illness is exacerbated by novel and emerging pathotypes, persistent contamination, antimicrobial resistance, an ever-changing environment, and the complexity of food production systems. Sporadic and outbreak events of common foodborne pathogens like Shiga toxigenic E. coli (STEC), Salmonella, Campylobacter, and Listeria monocytogenes are increasingly identified. Methods of controlling human infections linked with food products are essential to improve food safety and public health and to avoid economic losses associated with contaminated food product recalls and litigations. Bacteriophages (phages) are an attractive additional weapon in the ongoing search for preventative measures to improve food safety and public health. However, like all other antimicrobial interventions that are being employed in food production systems, phages are not a panacea to all food safety challenges. Therefore, while phage-based biocontrol can be promising in combating foodborne pathogens, their antibacterial spectrum is generally narrower than most antibiotics. The emergence of phage-insensitive single-cell variants and the formulation of effective cocktails are some of the challenges faced by phage-based biocontrol methods. This review examines phage-based applications at critical control points in food production systems with an emphasis on when and where they can be successfully applied at production and processing levels. Shortcomings associated with phage-based control measures are outlined together with strategies that can be applied to improve phage utility for current and future applications in food safety.
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Affiliation(s)
- Emmanuel W Bumunang
- Department of Biological Sciences, University of Lethbridge, Lethbridge, AB T1K 1M4, Canada
| | - Rahat Zaheer
- Agriculture and Agri-Food Canada, Lethbridge Research and Development Centre, Lethbridge, AB T1J 4B1, Canada
| | - Dongyan Niu
- Faculty of Veterinary Medicine, University of Calgary, Calgary, AB T2N 1N4, Canada
| | - Claudia Narvaez-Bravo
- Food and Human Nutritional Sciences, Faculty of Agricultural & Food Sciences, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
| | - Trevor Alexander
- Agriculture and Agri-Food Canada, Lethbridge Research and Development Centre, Lethbridge, AB T1J 4B1, Canada
| | - Tim A McAllister
- Agriculture and Agri-Food Canada, Lethbridge Research and Development Centre, Lethbridge, AB T1J 4B1, Canada
| | - Kim Stanford
- Department of Biological Sciences, University of Lethbridge, Lethbridge, AB T1K 1M4, Canada
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Inbaraj S, Angappan M, Thomas P, Kumar M, Irungbam K, Verma MR, Viswas KN, Abhishek, Rawat M, Chaudhuri P. Isolation and characterization of bacteriophage Ib_pec2 against shigatoxigenic Escherichia coli. J Basic Microbiol 2022; 63:472-480. [PMID: 36270976 DOI: 10.1002/jobm.202200398] [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: 06/25/2022] [Revised: 09/07/2022] [Accepted: 10/09/2022] [Indexed: 11/10/2022]
Abstract
This study was aimed to isolate and characterize bacteriophage against drug-resistant, shigatoxigenic Escherichia coli (STEC), one of the zoonotic, food-borne organisms associated with ruminants, mainly cattle. STEC were isolated (n = 35) from neonatal calves, dairy workers, and the surrounding environment and their antimicrobial resistance pattern was studied. Out of the 35 isolates tested, 17 isolates were found to be multidrug resistant to important antibiotics like ampicillin, amoxicillin-clavulanate, ciprofloxacin, streptomycin, and tetracycline. Bacteriophage namely Ib_pec2 was isolated against one of the STEC isolates and its morphology, genetic and proteomic characterization was done. Morphological analysis by TEM revealed bacteriophages belonging to myoviridae family. The genetic characterization of g23 gene revealed that the bacteriophage belonged to Tequatrovirus of myoviridae family. Proteomic analysis was able to identify five proteins identical to Tequatrovirus of myoviridae family. One-step growth curve experiment revealed a latency period of 40 min and a burst size of 893 pfu/bacteria. Temperature and pH ranging from 40°C to 50°C, pH 6-8, respectively. Phage could able to lyse majority of the STEC isolates. STEC are commensal organisms in the gastrointestinal tract of ruminants but are pathogenic in humans. Bacteriophages can be used as alternatives to antibiotics to control bacterial growth in ruminants and prevent its further spillage in the environment.
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Affiliation(s)
- Sophia Inbaraj
- Division of Bacteriology and Mycology, ICAR-Indian Veterinary Research Institute, Bareilly, Uttar Pradesh, India
| | - M Angappan
- Division of Veterinary Public Health, ICAR-Indian Veterinary Research Institute, Bareilly, Uttar Pradesh, India
| | - Prasad Thomas
- Division of Bacteriology and Mycology, ICAR-Indian Veterinary Research Institute, Bareilly, Uttar Pradesh, India
| | - Manish Kumar
- Division of Bacteriology and Mycology, ICAR-Indian Veterinary Research Institute, Bareilly, Uttar Pradesh, India
| | - Karuna Irungbam
- Animal Biochemistry Section, ICAR-Indian Veterinary Research Institute, Bareilly, Uttar Pradesh, India
| | - Med Ram Verma
- Division of Livestock Economics, Statistics and Information Technology, ICAR-Indian Veterinary Research Institute, Bareilly, Uttar Pradesh, India
| | - K Nagaleekar Viswas
- Division of Bacteriology and Mycology, ICAR-Indian Veterinary Research Institute, Bareilly, Uttar Pradesh, India
| | - Abhishek
- Division of Bacteriology and Mycology, ICAR-Indian Veterinary Research Institute, Bareilly, Uttar Pradesh, India
| | - Mayank Rawat
- (Retd)Division of Biological Standardisation, ICAR-Indian Veterinary Research Institute, Bareilly, Uttar Pradesh, India
| | - Pallab Chaudhuri
- Division of Bacteriology and Mycology, ICAR-Indian Veterinary Research Institute, Bareilly, Uttar Pradesh, India
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Morganella Phage Mecenats66 Utilizes an Evolutionarily Distinct Subtype of Headful Genome Packaging with a Preferred Packaging Initiation Site. Microorganisms 2022; 10:microorganisms10091799. [PMID: 36144401 PMCID: PMC9503643 DOI: 10.3390/microorganisms10091799] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Revised: 09/01/2022] [Accepted: 09/05/2022] [Indexed: 12/03/2022] Open
Abstract
Both recognized species from the genus Morganella (M. morganii and M. psychrotolerans) are Gram-negative facultative anaerobic rod-shaped bacteria that have been documented as sometimes being implicated in human disease. Complete genomes of seven Morganella-infecting phages are publicly available today. Here, we report on the genomic characterization of an insect associated Morganella sp. phage, which we named Mecenats66, isolated from dead worker honeybees. Phage Mecenats66 was propagated, purified, and subjected to whole-genome sequencing with subsequent complete genome annotation. After the genome de novo assembly, it was noted that Mecenats66 might employ a headful packaging with a preferred packaging initiation site, although its terminase amino acid sequence did not fall within any of the currently recognized headful packaging subtype employing phage (that had their packaging strategy experimentally verified) with clusters on a terminase sequence phylogenetic tree. The in silico predicted packaging strategy was verified experimentally, validating the packaging initiation site and suggesting that Mecenats66 represents an evolutionarily distinct headful genome packaging with a preferred packaging initiation site strategy subtype. These findings can possibly be attributed to several of the phages already found within the public biological sequence repositories and could aid newly isolated phage packaging strategy predictions in the future.
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Characterization of Phages YuuY, KaiHaiDragon, and OneinaGillian Isolated from Microbacterium foliorum. Int J Mol Sci 2022; 23:ijms23126609. [PMID: 35743053 PMCID: PMC9224216 DOI: 10.3390/ijms23126609] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Revised: 06/10/2022] [Accepted: 06/13/2022] [Indexed: 11/17/2022] Open
Abstract
Microbacterium foliorum is a Gram-positive bacteria found in organic matter. Three lytic bacteriophages, KaiHaiDragon, OneinaGillian, and YuuY, were isolated from M. foliorum strain NRRL B-24224. Phage YuuY in particular expresses a broad host range as it possesses the ability to infect closely related bacterial species Microbacterium aerolatum at a high plating efficiency. Characterization tests were performed on all three Microbacterium phage to assess morphology, genomic characteristics, pH and thermal stabilities, life cycle, and the type of receptor used for infection. All three phages showed similar pH stability, ranging from pH 5-11, except for KaiHaiDragon, which had a reduced infection effectiveness at a pH of 11. YuuY possessed a significantly higher temperature tolerance compared to the other Microbacterium phages as some phage particles remained viable after incubation temperatures of up to 80 °C. Based on the one-step growth curve assay, all three Microbacterium phages possessed a relatively short latent period of 90 min and an approximately two-fold burst size factor. Moreover, all three phages utilize a carbohydrate receptor to initiate infection. Based on bioinformatics analysis, YuuY, KaiHaiDragon and OneinaGillian were assigned to clusters EA10, EC, and EG, respectively.
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Paley EL. Induction of Gut Microbial Tryptamine by SARS-CoV-2 in Nonhuman Primate Model Consistent with Tryptamine-Induced Model of Neurodegeneration. J Alzheimers Dis Rep 2021; 5:733-738. [PMID: 34755047 PMCID: PMC8543377 DOI: 10.3233/adr-210032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/18/2021] [Indexed: 11/22/2022] Open
Abstract
The author discussed recently the possible molecular mechanisms that cause the COVID-19 disease symptoms. Here the analysis of the recent experimental data supports the hypothesis that production of the gut microbial tryptamine can be induced by the SARS-CoV-2 fecal viral activity due to the selective pressure or positive selection of tryptamine-producing microorganisms. In this report, the author suggests that the mechanism of microbial selection bases on the abilities of tryptamine to affect the viral nucleic acid. In other words, the gut microorganisms producing tryptamine are more resistant to SARS-CoV-2 fecal viral activity than microorganisms producing no tryptamine. Earlier we demonstrated the induction of neurodegeneration by tryptamine in human cells and mouse brain. Furthermore, we were able to uncover the human gut bacteria associated with Alzheimer’s disease (AD) using PCR testing of human fecal samples with the new-designed primers targeting the tryptophan-tryptamine pathway. Likely, SARS-CoV-2 is one of the selective pressure factors in the cascade accelerating the neurodegenerative process in AD. This suggestion is consistent with a higher proportion of AD patients among COVID-19 related victims. Gut microbial tryptamine increase due to the viral infection-induced dysbiosis can synergize and potentiate the tryptamine cytotoxicity, necrotizing ability and other properties as a virulence factor.
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Affiliation(s)
- Elena L Paley
- Expert BioMed, Inc. and Nonprofit Public Charity Stop Alzheimers Corp., Miami-Dade, FL, USA
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Isolation and Identification of a Wastewater Siphoviridae Bacteriophage Targeting Multidrug-resistant Klebsiella pneumoniae. Jundishapur J Microbiol 2021. [DOI: 10.5812/jjm.118910] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Background: Based on the WHO, multidrug-resistant Klebsiella pneumoniae is a priority pathogen that causes opportunistic infections and is widely spread in the environment. Phage therapy is considered a natural, safe, and very efficient alternative to treat difficult-to-treat infections. Objectives: This study aimed to isolate highly virulent, lytic bacteriophages and evaluate their efficacy for lysing multidrug-resistant K. pneumoniae. Methods: Municipal wastewater samples were collected and filtered using 0.22 µm syringe filters and cultivated with log-phase cultures of K. pneumoniae using enrichment media. After 48 h of incubation, the cultures were centrifuged, and the resultant supernatant was filtered (0.22 µm). The detection of the phage was done using the spot assay with K. pneumoniae as the host. One-step growth kinetics and bacterial reduction tests were conducted to assess the growth kinetics of the isolated phage. The stability of the isolated phage was characterized by subjecting it to various temperature and pH conditions. The chemical stability of the K. pneumoniae phage was determined by exposing it to various organic compounds. A panel of 20 bacterial strains was tested using the spot assay, as well as double agar overlying assay, to determine the host range of the isolated phage. Results: Out of 40 wastewater samples tested, only one sample was tested positive for the K. pneumoniae phage (2.5%) that was lytic against the host strain. The K. pneumoniae phage had a latent period of 15 min and a burst size of 100 virions per infected cell. It was most stable at 37°C and pH range of 6.0 to 10.0. Chemically, the K. pneumoniae phage was resistant to 10% chloroform treatment. Transmission electron micrograph indicated that the K. pneumoniae phage belonged to the order Caudovirales, family Siphoviridae, morphotype B1. Conclusions: Most of the characteristic features of the K. pneumoniae phage indicated the potential of this phage to be used in phage therapy. Hence, a comprehensive study is highly recommended to characterize the K. pneumoniae phage genome, detect its molecular interactions with the host cell, and determine its lytic activity in combination with other phages, which may lead to the efficient utilization of this phage in phage therapy against K. pneumoniae infections.
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Nguyen TT, Xuan TTT, Ngoc TH, Duyen LTM, Vinh TQ, My PDT, Hoang HA, Nga LP. Diverse Bacteriophages Infecting the Bacterial Striped Catfish Pathogen Edwardsiella ictaluri. Microorganisms 2021; 9:microorganisms9091830. [PMID: 34576725 PMCID: PMC8465730 DOI: 10.3390/microorganisms9091830] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2021] [Revised: 08/17/2021] [Accepted: 08/25/2021] [Indexed: 11/16/2022] Open
Abstract
Bacteriophages infecting Edwardsiella ictaluri have been less investigated, although the host bacterium is one of the most important fish pathogens causing enteric septicemia of catfish (ESC). We present here two distinctly novel bacteriophages vB_EiM_PVN06 and vB_EiA_PVN09 infecting Edwardsiella ictaluri E1, with their geographical origins from the Mekong Delta, Vietnam. Bacteriophage vB_EiM_PVN06 native to a mud sample reveals complete differences of biological properties with the phage vB_EiA_PVN09 originated from a viscus of a healthy catfish (Pangasianodon hypophthalmus) cultured in the same area. Morphological analyses combined with genomic data indicate that phage vB_EiM_PVN06 is classified to Myoviridae family and shares high similarity with E. ictaluri phage PEi21 genome, while vB_EiA_PVN09 is a member of Teseptimavirus genus, Autographiviridae family, and mostly closes to phage vB_EcoP_IME390. The vB_EiA_PVN09 is a T7-like bacteriophage, which has been firstly found infecting to E. ictaluri, and host range analysis also evidences for the cross-infection of this phage to Escherichia coli K12 and Escherichia coli DH5α. Together, our research highlights the diversity of bacteriophages infecting the pathogen E. ictaluri and suggests further explorations of lytic phages in environmental niches, to be exploited in feasible strategies of phage therapy in ESC disease control.
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Affiliation(s)
- Tan-Trung Nguyen
- Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet, District 10, Ho Chi Minh City 700000, Vietnam; (T.-T.N.); (T.T.T.X.); (T.H.N.); (L.T.M.D.); (T.Q.V.); (P.D.T.M.); (H.A.H.)
- Vietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc District, Ho Chi Minh City 700000, Vietnam
| | - Tran T. T. Xuan
- Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet, District 10, Ho Chi Minh City 700000, Vietnam; (T.-T.N.); (T.T.T.X.); (T.H.N.); (L.T.M.D.); (T.Q.V.); (P.D.T.M.); (H.A.H.)
- Vietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc District, Ho Chi Minh City 700000, Vietnam
| | - To H. Ngoc
- Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet, District 10, Ho Chi Minh City 700000, Vietnam; (T.-T.N.); (T.T.T.X.); (T.H.N.); (L.T.M.D.); (T.Q.V.); (P.D.T.M.); (H.A.H.)
- Vietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc District, Ho Chi Minh City 700000, Vietnam
| | - Le T. My Duyen
- Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet, District 10, Ho Chi Minh City 700000, Vietnam; (T.-T.N.); (T.T.T.X.); (T.H.N.); (L.T.M.D.); (T.Q.V.); (P.D.T.M.); (H.A.H.)
- Vietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc District, Ho Chi Minh City 700000, Vietnam
| | - Tu Q. Vinh
- Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet, District 10, Ho Chi Minh City 700000, Vietnam; (T.-T.N.); (T.T.T.X.); (T.H.N.); (L.T.M.D.); (T.Q.V.); (P.D.T.M.); (H.A.H.)
- Vietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc District, Ho Chi Minh City 700000, Vietnam
| | - Pham D. T. My
- Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet, District 10, Ho Chi Minh City 700000, Vietnam; (T.-T.N.); (T.T.T.X.); (T.H.N.); (L.T.M.D.); (T.Q.V.); (P.D.T.M.); (H.A.H.)
- Vietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc District, Ho Chi Minh City 700000, Vietnam
| | - Hoang A. Hoang
- Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet, District 10, Ho Chi Minh City 700000, Vietnam; (T.-T.N.); (T.T.T.X.); (T.H.N.); (L.T.M.D.); (T.Q.V.); (P.D.T.M.); (H.A.H.)
- Vietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc District, Ho Chi Minh City 700000, Vietnam
| | - Le P. Nga
- Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet, District 10, Ho Chi Minh City 700000, Vietnam; (T.-T.N.); (T.T.T.X.); (T.H.N.); (L.T.M.D.); (T.Q.V.); (P.D.T.M.); (H.A.H.)
- Vietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc District, Ho Chi Minh City 700000, Vietnam
- Correspondence: ; Tel.: +84-902-966166
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In vitro efficiency evaluation of phage cocktail for biocontrol of Salmonella spp. in food products. Arch Microbiol 2021; 203:5445-5452. [PMID: 34406443 DOI: 10.1007/s00203-021-02522-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 08/06/2021] [Accepted: 08/09/2021] [Indexed: 10/20/2022]
Abstract
This study used a set of different bacteriophages to control contaminations of Salmonella spp., a major food pathogen. A cocktail of four phages designated based on host range and in vitro lytic assay showed a lower bacteriophage insensitive mutant frequency and considerable stability at 4 °C and 28 °C up to 60 days. The work evaluated the effectiveness of cocktail of four phages in reducing Salmonella spp. in four different food matrices (liquid egg, eggshell, milk, lettuce). A maximum of 1.7 log reduction in Salmonella spp. was achieved upon treatment of liquid eggs with phage cocktail for 72 h at 4 °C. In milk, the application of phage cocktail reduced recoverable Salmonella spp. by 1.9 log and 1.8 log at 28ºC (6 h) and 4ºC (72 h), respectively. A significant 2.9 log reduction of Salmonella spp. was obtained in eggshell after a 6 h incubation and Salmonella spp. was beyond detection level after 24 h at 28ºC. The application of cocktail also reduced Salmonella spp. beyond the detectable level in lettuce after 8 h at 28 °C. Our results indicated considerable stability of phages in different food matrices. Taken together, our findings establish the potential effectiveness of the bacteriophage cocktail as a biocontrol agent for Salmonella spp. in different food matrices.
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Dang THO, Xuan TTT, Duyen LTM, Le NP, Hoang HA. Protective efficacy of phage PVN02 against haemorrhagic septicaemia in striped catfish Pangasianodon hypophthalmus via oral administration. JOURNAL OF FISH DISEASES 2021; 44:1255-1263. [PMID: 33913522 DOI: 10.1111/jfd.13387] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Accepted: 04/15/2021] [Indexed: 06/12/2023]
Abstract
Haemorrhagic septicaemia caused by Aeromonas hydrophila in striped catfish (Pangasianodon hypophthalmus) is one of the most important aquatic diseases in the Mekong Delta, Vietnam. However, antibiotic-resistant A. hydrophila strains have become popular and resulted in inadequate control of the disease in striped catfish farms. This study investigates the protective efficacy of bacteriophage PVN02 against haemorrhagic septicaemia in striped catfish via oral administration. The phage-containing pellets were prepared by spraying the phage solution on food pellets at 20 ml/kg. The rate of phage desorption from the food pellets into the water was very low; the phage titres in the water were approximately log 1.0 PFU/ml or undetectable. The in vivo experiment evaluating the protective efficacy of PVN02 against haemorrhagic septicaemia in striped catfish was conducted using 21 groups of 1,260 fish in 50-L plastic tanks in triplicate. The catfish were fed twice daily with phage-sprayed pellets. Different densities of bacterial suspensions were added into the tanks for 24 hr. Without the existence of the phage, the highest mortality rate was 68.3 ± 2.9% at the highest density of bacterial suspension. In contrast, the mortality rate at the highest density of bacterial suspension was significantly reduced to 8.33 ± 2.9% or 16.67 ± 2.9% at the phage dose of log 6.2 ± 0.09 or log 4.2 ± 0.09 PFU/g. This study provides a very practical manner of applying phage therapy to prevent disease in large-scale striped catfish farms.
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Affiliation(s)
| | - Tran T T Xuan
- Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), Ho Chi Minh City, Vietnam
- Vietnam National University Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Le T M Duyen
- Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), Ho Chi Minh City, Vietnam
- Vietnam National University Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Nga P Le
- Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), Ho Chi Minh City, Vietnam
- Vietnam National University Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Hoang A Hoang
- Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), Ho Chi Minh City, Vietnam
- Vietnam National University Ho Chi Minh City, Ho Chi Minh City, Vietnam
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Bacteriophage cocktail and phage antibiotic synergism as promising alternatives to conventional antibiotics for the control of multi-drug-resistant uropathogenic Escherichia coli. Virus Res 2021; 302:198496. [PMID: 34182014 DOI: 10.1016/j.virusres.2021.198496] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Revised: 06/16/2021] [Accepted: 06/20/2021] [Indexed: 11/21/2022]
Abstract
Infections related to antibiotic resistant bacteria are accelerating on a global scale, and hence to encounter this problem in case of urinary tract infections; bacteriophages were isolated for biocontrol of multi-drug resistant (MDR) uropathogenic Escherichia coli (UPECs) isolates. Four lytic phages were purified, characterized, and evaluated for their effectiveness in the form of cocktail and in synergy with antibiotics. Morphological features and other life cycle specifications of phages revealed that two phages Escherichia phage FS11 and Escherichia phage FS17 belonged to Myoviridae and the other two phages Escherichia phage PS8 and Escherichia phage PS6 belonged to Siphoviridae family of order Caudovirales. One step growth curve analysis demonstrated that phage FS11 and phage FS17 had latent time of 24 min and 26 min, and a burst size of ~121 and 98 phage particles/ cell respectively; while for phage PS8 and phage PS6, the latent time was 42 min and 35 min, and the burst size was 87 and 78 particles/ cell, respectively; depicting the lytic nature of phages. The use of all four phages together in the form of a cocktail resulted into a considerable enhancement in the lytic ability; the phage cocktail lysed 86.7% of the clinical isolates, compared to lysis in the range of 50%-66% by individual phages. Studies on in vitro evaluation of phage-antibiotic combinations revealed synergism between antibiotics and the phage cocktail (phage PS6 and phage FS17), wherein the phage cocktail was observed to efficiently inhibit the strains in the presence of sub-lethal doses of antibiotics. The study thus concludes that the use of multiple phages and phage-antibiotic combinations could prove beneficial in the era of rapidly increasing drug-resistant strains.
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Yamaki S, Kuronuma S, Kawai Y, Yamazaki K. Inhibitory effect of a combination with novel jumbo bacteriophages ΦMV-1 and ΦMV-4 on Morganella morganii subsp. morganii growth and histamine accumulation. Int J Food Microbiol 2019; 317:108457. [PMID: 31816558 DOI: 10.1016/j.ijfoodmicro.2019.108457] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2019] [Revised: 11/19/2019] [Accepted: 11/21/2019] [Indexed: 12/11/2022]
Abstract
Histamine (scombroid) poisoning is a foodborne illness caused by ingestion of histamine-contaminated seafood; therefore, inhibition of the growth of histamine-producing bacteria is key for it prevention. Infection of pathogenic bacteria by bacteriophages (phages) is being developed to prevent multiple foodborne illnesses. Here, we describe the inhibitory effect of a phage mixture on growth and histamine accumulation of Morganella morganii subsp. morganii, the primary causative agent of histamine poisoning in fish meat. We isolated novel two phages, ΦMV-1 and ΦMV-4, which infected M. morganii subsp. morganii strains tested in this study. ΦMV-1 and ΦMV-4 belong to family Myoviridae. Pulsed-field gel electrophoresis revealed that these phages are jumbo bacteriophages with large genomes. The latent period, rise period and burst size of ΦMV-1 were 30 min, 60 min, and 224 PFU per infected cell, respectively, and those of ΦMV-4 were 60 min, 50 min, and 62 PFU per infected cell, respectively. A mixture of ΦMV-1 and ΦMV-4 effectively prevented regrowth of M. morganii subsp. morganii after phage treatment, suggesting that the phage mixture treatment is more effective for inhibition of growth and histamine accumulation by M. morganii subsp. morganii than single phage treatment. Treatment with phage mixture inhibited growth and histamine accumulation by M. morganii subsp. morganii in canned and fresh tuna. The phage mixture might be an effective way to prevent growth of the histamine producer and accumulation of histamine in seafood.
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Affiliation(s)
- Shogo Yamaki
- Laboratory of Marine Food Science and Technology, Faculty of Fisheries Sciences, Hokkaido University, Hakodate, Japan.
| | - Soya Kuronuma
- Graduate School of Fisheries Sciences, Hokkaido University, Hakodate, Japan
| | - Yuji Kawai
- Laboratory of Marine Food Science and Technology, Faculty of Fisheries Sciences, Hokkaido University, Hakodate, Japan
| | - Koji Yamazaki
- Laboratory of Marine Food Science and Technology, Faculty of Fisheries Sciences, Hokkaido University, Hakodate, Japan
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13
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Ahamed ST, Roy B, Basu U, Dutta S, Ghosh AN, Bandyopadhyay B, Giri N. Genomic and Proteomic Characterizations of Sfin-1, a Novel Lytic Phage Infecting Multidrug-Resistant Shigella spp. and Escherichia coli C. Front Microbiol 2019; 10:1876. [PMID: 31507544 PMCID: PMC6714547 DOI: 10.3389/fmicb.2019.01876] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2019] [Accepted: 07/30/2019] [Indexed: 12/14/2022] Open
Abstract
Shigellosis is a public health threat in developed as well as developing countries like “India.” While antibiotic therapy is the mainstay of treatment for shigellosis, current emergence of multidrug-resistant strains of Shigella spp. has posed the problem more challenging. Lytic bacteriophages which destroy antibiotic resistant Shigella spp. have great potential in this context and hence their identification and detailed characterization is necessary. In this study we presented the isolation and a detailed characterization of a novel bacteriophage Sfin-1, which shows potent lytic activity against multidrug-resistant isolates of Shigella flexneri, Shigella dysenteriae, Shigella sonnei obtained from clinical specimens from shigellosis patients. It is also active against Escherichia coli C. The purified phage is lytic in nature, exhibited absorption within 5–10 min, a latent period of 5–20 min and burst size of ∼28 to ∼146 PFU/cell. The isolated phage shows stability in a broad pH range and survives an hour at 50°C. Genome sequencing and phylogenetic analyses showed that Sfin-1 is a novel bacteriophage, which is very closely related to T1-like phages (89.59% identity with Escherichia virus T1). In silico analysis indicates that Sfin-1 genome consists of double stranded linear DNA of 50,403 bp (GC content of 45.2%) encoding 82 potential coding sequences, several potential promoters and transcriptional terminators. Under electron microscopy, Sfin-1 shows morphology characteristics of the family Siphoviridae with an isometric head (61 nm) and a non-contractile tail (155 nm). This is most likely the first report of a lytic bacteriophage that is active against three of the most virulent multidrug-resistant Shigella species and therefore might have a potential role in phage therapy of patients infected with these organisms.
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Affiliation(s)
- Sk Tousif Ahamed
- Department of Microbiology, Acharya Prafulla Chandra College, Kolkata, India
| | - Banibrata Roy
- Department of Microbiology, Acharya Prafulla Chandra College, Kolkata, India
| | - Utpal Basu
- Department of Molecular Biology and Biotechnology, University of Kalyani, Kalyani, India
| | - Shanta Dutta
- Division of Bacteriology, National Institute of Cholera and Enteric Diseases, Kolkata, India
| | - A N Ghosh
- Division of Bacteriology, National Institute of Cholera and Enteric Diseases, Kolkata, India
| | | | - Nabanita Giri
- Department of Microbiology, Acharya Prafulla Chandra College, Kolkata, India
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14
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Hoang HA, Yen MH, Ngoan VT, Nga LP, Oanh DTH. Virulent bacteriophage of Edwardsiella ictaluri isolated from kidney and liver of striped catfish Pangasianodon hypophthalmus in Vietnam. DISEASES OF AQUATIC ORGANISMS 2018; 132:49-56. [PMID: 30530930 DOI: 10.3354/dao03302] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Striped catfish Pangasianodon hypophthalmus farmed in the Mekong Delta, Vietnam, represents an important contribution to Vietnamese aquaculture exports. However, these fish are affected by frequent disease outbreaks across the entire region. One of the most common infections involves white spots in the internal organs, caused by the bacterium Edwardsiella ictaluri. In this study, a virulent phage specific to E. ictaluri, designated MK7, was isolated from striped catfish kidney and liver samples and characterized. Morphological analysis indicates probable placement in the family Myoviridae with a 65 nm icosahedral head and a 147 %%CONV_ERR%% 19 nm tail. A double-stranded DNA genome of approximately 34 kb was predicted by restriction fragment analysis following digestion with SmaI. The adsorption affinity (ka) of the MK7 phage was estimated as 1.6 %%CONV_ERR%% 10-8 ml CFU-1 min-1, and according to a 1-step growth curve, its latent period and burst size were ~45 min and ~55 phage particles per infected host cell, respectively. Of the 17 bacterial strains tested, MK7 only infected E. ictaluri, although other species of Edwardsiella were not tested. E. ictaluri was also challenged in vitro, in both broth and water from a striped catfish pond and was inactivated by MK7 for 15 h in broth and 51 h in pond water. Thus, initial characterization of phage MK7 indicates its potential utility as a biotherapeutic agent against E. ictaluri infection in striped catfish. This is the first report of a lytic phage specific to an important striped catfish pathogen.
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Affiliation(s)
- Hoang A Hoang
- Department of Biotechnology, Faculty of Chemical Engineering, Ho Chi Minh City University of Technology, Vietnam National University - Ho Chi Minh City (VNU-HCM), 268 Ly Thuong Kiet St., District 10, HCMC, Vietnam
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15
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Litt PK, Saha J, Jaroni D. Characterization of Bacteriophages Targeting Non-O157 Shiga Toxigenic Escherichia coli. J Food Prot 2018; 81:785-794. [PMID: 29624104 DOI: 10.4315/0362-028x.jfp-17-460] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Non-O157 Shiga toxigenic Escherichia coli (STEC) are an important group of foodborne pathogens, implicated in several outbreaks and recalls in the past 2 decades. It is therefore crucial to devise effective control strategies against these pathogens. Bacteriophages present an attractive alternative to conventional pathogen control methods in the food industry. Bacteriophages, targeting non-O157 STEC (O26, O45, O103, O111, O121, O145), were isolated from beef cattle operations in Oklahoma. Their host range and lytic ability were determined against several ( n = 21) non-O157 STEC isolates, by using the spot-on-lawn assay. Isolated phages were purified, and their morphology was determined under a transmission electron microscope. Infection kinetics of selected phages ( n = 19), particularly adsorption rate, rise period, latent period, and burst size, were determined. Phages were also evaluated for stability at a wide pH range (1 to 11) and temperature range (-80 to 90°C). In total, 45 phages were isolated and classified into Myoviridae, Siphoviridae, or Tectiviridae. The phages had a latent period between 8 and 37 min, a rise period between 19 and 40 min, and a large burst size (12 to 794 virions per infected cell), indicating high lytic activity. Tested phages were stable at pH 5 to 9 for 24 h, whereas a decrease in phage titer was observed at pHs 1, 2, and 11. Phages were stable at 40 and 60°C, except for O103-specific phages. At 70°C, all the phages lost viability after 20 min, except three phages targeting O26 and O121 and one phage targeting O45 and O111 STEC, which remained viable for 60 min. All the phages lost activity after 10 min at 90°C, except one each of O26 and O121 STEC-infecting phages that remained viable for 60 min. Phages remained stable for 90 days under refrigerated (4°C) and frozen (-20 and -80°C) storage. Characterization of phages, targeting diverse non-O157 STEC serotypes, could help in the development of effective biocontrol strategies for this group of pathogens in the food industry.
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Affiliation(s)
- Pushpinder Kaur Litt
- Food and Agricultural Products Center and Department of Animal Science, Oklahoma State University, Stillwater, Oklahoma 74075, USA (ORCID: http://orcid.org/0000-0002-2673-0728 [P.K.L.]; http://orcid.org/0000-0002-7994-0550 [D.J.])
| | - Joyjit Saha
- Food and Agricultural Products Center and Department of Animal Science, Oklahoma State University, Stillwater, Oklahoma 74075, USA (ORCID: http://orcid.org/0000-0002-2673-0728 [P.K.L.]; http://orcid.org/0000-0002-7994-0550 [D.J.])
| | - Divya Jaroni
- Food and Agricultural Products Center and Department of Animal Science, Oklahoma State University, Stillwater, Oklahoma 74075, USA (ORCID: http://orcid.org/0000-0002-2673-0728 [P.K.L.]; http://orcid.org/0000-0002-7994-0550 [D.J.])
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16
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Yamaki S, Kawai Y, Yamazaki K. Biocontrol of Morganella morganii subsp. morganii and Histamine Accumulation in Tuna Meat by Treatment with a Lytic Bacteriophage. FOOD SCIENCE AND TECHNOLOGY RESEARCH 2018. [DOI: 10.3136/fstr.24.329] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Shogo Yamaki
- Laboratory of Marine Food Science and Technology, Faculty of Fisheries Sciences, Hokkaido University
| | - Yuji Kawai
- Laboratory of Marine Food Science and Technology, Faculty of Fisheries Sciences, Hokkaido University
| | - Koji Yamazaki
- Laboratory of Marine Food Science and Technology, Faculty of Fisheries Sciences, Hokkaido University
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17
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Litt PK, Jaroni D. Isolation and Physiomorphological Characterization of Escherichia coli O157:H7-Infecting Bacteriophages Recovered from Beef Cattle Operations. Int J Microbiol 2017; 2017:7013236. [PMID: 29123549 PMCID: PMC5662819 DOI: 10.1155/2017/7013236] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2017] [Accepted: 08/30/2017] [Indexed: 11/18/2022] Open
Abstract
Bacteriophages, recovered from beef cattle environment and specifically targeting Escherichia coli O157:H7, were examined for their physiological and morphological characteristics. Degree of bacterial lysis and host range of isolated bacteriophages was determined against 55 isolates of E. coli O157:H7. Morphology of phages was examined under transmission electron microscope. Phage growth parameters, particularly rate of adsorption, rise period, latent period, and burst size were also determined. The stability of isolated phages was tested at acidic and alkaline pH, at high temperatures, and in cold storage. A total of 7 phages were isolated which showed lytic activity against 50 out of 55 isolates of E. coli O157:H7. Based on the morphology, phages were classified into Myoviridae or Siphoviridae family. Phages had a rise period between 19 and 40 min, a short latent period between 12 and 30 min, and a large burst size (89-631 virions per infected cell), indicating high lytic activity. Phages remained stable for 24 h at a wide pH (1-11) and temperature range (40-60°C) and for 90 d in cold storage. Characterization of bacteriophages, with a diverse host range of E. coli O157:H7, could aid in the development of effective biocontrol strategies for this pathogen in the food industry.
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Affiliation(s)
- Pushpinder Kaur Litt
- Department of Animal Science and Food and Agricultural Products Center, Oklahoma State University, 148 FAPC, Monroe St., Stillwater, OK 74078, USA
| | - Divya Jaroni
- Department of Animal Science and Food and Agricultural Products Center, Oklahoma State University, 148 FAPC, Monroe St., Stillwater, OK 74078, USA
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18
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Amarillas L, Rubí-Rangel L, Chaidez C, González-Robles A, Lightbourn-Rojas L, León-Félix J. Isolation and Characterization of phiLLS, a Novel Phage with Potential Biocontrol Agent against Multidrug-Resistant Escherichia coli. Front Microbiol 2017; 8:1355. [PMID: 28785246 PMCID: PMC5519627 DOI: 10.3389/fmicb.2017.01355] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2017] [Accepted: 07/04/2017] [Indexed: 01/21/2023] Open
Abstract
Foodborne diseases are a serious and growing problem, and the incidence and prevalence of antimicrobial resistance among foodborne pathogens is reported to have increased. The emergence of antibiotic-resistant bacterial strains demands novel strategies to counteract this epidemic. In this regard, lytic bacteriophages have reemerged as an alternative for the control of pathogenic bacteria. However, the effective use of phages relies on appropriate biological and genomic characterization. In this study, we present the isolation and characterization of a novel bacteriophage named phiLLS, which has shown strong lytic activity against generic and multidrug-resistant Escherichia coli strains. Transmission electron microscopy of phiLLS morphology revealed that it belongs to the Siphoviridae family. Furthermore, this phage exhibited a relatively large burst size of 176 plaque-forming units per infected cell. Phage phiLLS significantly reduced the growth of E. coli under laboratory conditions. Analyses of restriction profiles showed the presence of submolar fragments, confirming that phiLLS is a pac-type phage. Phylogenetic analysis based on the amino acid sequence of large terminase subunits confirmed that this phage uses a headful packaging strategy to package their genome. Genomic sequencing and bioinformatic analysis showed that phiLLS is a novel bacteriophage that is most closely related to T5-like phages. In silico analysis indicated that the phiLLS genome consists of 107,263 bp (39.0 % GC content) encoding 160 putative ORFs, 16 tRNAs, several potential promoters and transcriptional terminators. Genome analysis suggests that the phage phiLLS is strictly lytic without carrying genes associated with virulence factors and/or potential immunoreactive allergen proteins. The bacteriophage isolated in this study has shown promising results in the biocontrol of bacterial growth under in vitro conditions, suggesting that it may prove useful as an alternative agent for the control of foodborne pathogens. However, further oral toxicity testing is needed to ensure the safety of phage use.
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Affiliation(s)
- Luis Amarillas
- Laboratorio de Biología Molecular y Genómica Funcional, Centro de Investigación en Alimentación y DesarrolloCuliacán, Mexico
- Laboratorio de Genética, Instituto de Investigación Lightbourn, Cd. JiménezChihuahua, Mexico
| | - Lucia Rubí-Rangel
- Laboratorio de Biología Molecular y Genómica Funcional, Centro de Investigación en Alimentación y DesarrolloCuliacán, Mexico
| | - Cristobal Chaidez
- Laboratorio Nacional para la Investigación en Inocuidad Alimentaria, Centro de Investigación en Alimentación y DesarrolloCuliacán, Mexico
| | - Arturo González-Robles
- Departamento de Infectómica y Patogénesis Molecular, Centro de Investigación y de Estudios Avanzados, Instituto Politécnico NacionalCiudad de México, Mexico
| | - Luis Lightbourn-Rojas
- Laboratorio de Genética, Instituto de Investigación Lightbourn, Cd. JiménezChihuahua, Mexico
| | - Josefina León-Félix
- Laboratorio de Biología Molecular y Genómica Funcional, Centro de Investigación en Alimentación y DesarrolloCuliacán, Mexico
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19
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Oliveira H, Pinto G, Oliveira A, Noben JP, Hendrix H, Lavigne R, Łobocka M, Kropinski AM, Azeredo J. Characterization and genomic analyses of two newly isolated Morganella phages define distant members among Tevenvirinae and Autographivirinae subfamilies. Sci Rep 2017; 7:46157. [PMID: 28387353 PMCID: PMC5384007 DOI: 10.1038/srep46157] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2016] [Accepted: 03/09/2017] [Indexed: 11/09/2022] Open
Abstract
Morganella morganii is a common but frequent neglected environmental opportunistic pathogen which can cause deadly nosocomial infections. The increased number of multidrug-resistant M. morganii isolates motivates the search for alternative and effective antibacterials. We have isolated two novel obligatorily lytic M. morganii bacteriophages (vB_MmoM_MP1, vB_MmoP_MP2) and characterized them with respect to specificity, morphology, genome organization and phylogenetic relationships. MP1's dsDNA genome consists of 163,095 bp and encodes 271 proteins, exhibiting low DNA (<40%) and protein (<70%) homology to other members of the Tevenvirinae. Its unique property is a >10 kb chromosomal inversion that encompass the baseplate assembly and head outer capsid synthesis genes when compared to other T-even bacteriophages. MP2 has a dsDNA molecule with 39,394 bp and encodes 55 proteins, presenting significant genomic (70%) and proteomic identity (86%) but only to Morganella bacteriophage MmP1. MP1 and MP2 are then novel members of Tevenvirinae and Autographivirinae, respectively, but differ significantly from other tailed bacteriophages of these subfamilies to warrant proposing new genera. Both bacteriophages together could propagate in 23 of 27 M. morganii clinical isolates of different origin and antibiotic resistance profiles, making them suitable for further studies on a development of bacteriophage cocktail for potential therapeutic applications.
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Affiliation(s)
- Hugo Oliveira
- CEB - Centre of Biological Engineering, LIBRO - Laboratório de Investigação em Biofilmes Rosário Oliveira, University of Minho, 4710-057 Braga, Portugal
| | - Graça Pinto
- CEB - Centre of Biological Engineering, LIBRO - Laboratório de Investigação em Biofilmes Rosário Oliveira, University of Minho, 4710-057 Braga, Portugal
| | - Ana Oliveira
- CEB - Centre of Biological Engineering, LIBRO - Laboratório de Investigação em Biofilmes Rosário Oliveira, University of Minho, 4710-057 Braga, Portugal
| | - Jean-Paul Noben
- Biomedical Research Institute and Transnational University Limburg, Hasselt University, Diepenbeek 3590, Belgium
| | - Hanne Hendrix
- Laboratory of Gene Technology, KU Leuven, Kasteelpark Arenberg 21 box 2462, B-3001 Leuven, Belgium
| | - Rob Lavigne
- Laboratory of Gene Technology, KU Leuven, Kasteelpark Arenberg 21 box 2462, B-3001 Leuven, Belgium
| | - Małgorzata Łobocka
- Department of Microbial Biochemistry, Institute of Biochemistry and Biophysics of the Polish Academy of Sciences, Warsaw, Poland.,Autonomous Department of Microbial Biology, Faculty of Agriculture and Biology, Warsaw University of Life Sciences, Warsaw, Poland
| | - Andrew M Kropinski
- Departments of Food Science; Molecular and Cellular Biology; and, Pathobiology, University of Guelph, Guelph, ON N1G 2W1, Canada
| | - Joana Azeredo
- CEB - Centre of Biological Engineering, LIBRO - Laboratório de Investigação em Biofilmes Rosário Oliveira, University of Minho, 4710-057 Braga, Portugal
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20
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Lee SY, Woo SK, Lee SM, Ha EJ, Lim KH, Choi KH, Roh YH, Eom YB. Microbiota Composition and Pulmonary Surfactant Protein Expression as Markers of Death by Drowning. J Forensic Sci 2017; 62:1080-1088. [PMID: 28097647 DOI: 10.1111/1556-4029.13347] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2016] [Revised: 09/02/2016] [Accepted: 09/10/2016] [Indexed: 12/14/2022]
Abstract
Pathological diagnosis of drowning remains a challenge for forensic science, because of a lack of pathognomonic findings. We analyzed microbiota and surfactant protein in the lungs for a novel diagnosis of drowning. All rats were divided into drowning, postmortem submersion, and control groups. The water, lungs, closed organs (kidney and liver), and cardiac blood in rats were assayed by targeting 16S ribosomal RNA of Miseq sequencing. Lung samples were analyzed by immunohistochemical staining for surfactant protein A. The closed organs and cardiac blood of drowned group have a lot of aquatic microbes, which have not been detected in postmortem submersion group. Furthermore, intra-alveolar granular staining of surfactant protein A (SP-A) was severely observed in the drowned group than the postmortem submersion and control groups. The findings suggested that the presence of aquatic microbiota in the closed organs and increased expression of SP-A could be markers for a diagnosis of drowning.
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Affiliation(s)
- So-Yeon Lee
- Department of Medical Science, College of Medical Sciences, Soonchunhyang University, Asan, Chungnam, 31538, Korea
| | - Seung-Kyun Woo
- Department of Medical Science, College of Medical Sciences, Soonchunhyang University, Asan, Chungnam, 31538, Korea
| | - So-Min Lee
- Department of Biomedical Laboratory Science, College of Medical Sciences, Soonchunhyang University, Asan, Chungnam, 31538, Korea
| | - Eun-Ju Ha
- Department of Biomedical Laboratory Science, College of Medical Sciences, Soonchunhyang University, Asan, Chungnam, 31538, Korea
| | - Kyoung-Hee Lim
- Department of Biomedical Laboratory Science, College of Medical Sciences, Soonchunhyang University, Asan, Chungnam, 31538, Korea
| | - Kyung-Hwa Choi
- National Research Safety Headquarters, Korea Research Institute of Bioscience & Biotechnology, Cheongju, Chungbuk, 28116, Korea
| | - Young-Hee Roh
- National Research Safety Headquarters, Korea Research Institute of Bioscience & Biotechnology, Cheongju, Chungbuk, 28116, Korea
| | - Yong-Bin Eom
- Department of Medical Science, College of Medical Sciences, Soonchunhyang University, Asan, Chungnam, 31538, Korea.,Department of Biomedical Laboratory Science, College of Medical Sciences, Soonchunhyang University, Asan, Chungnam, 31538, Korea
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21
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Yamaki S, Kawai Y, Yamazaki K. Characterization of a novel bacteriophage, Phda1, infecting the histamine-producing Photobacterium damselae
subsp. damselae. J Appl Microbiol 2015; 118:1541-50. [DOI: 10.1111/jam.12809] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2015] [Revised: 03/12/2015] [Accepted: 03/17/2015] [Indexed: 01/21/2023]
Affiliation(s)
- S. Yamaki
- Laboratory of Marine Food Science and Technology; Faculty of Fisheries Sciences; Hokkaido University; Minato Hakodate Japan
| | - Y. Kawai
- Laboratory of Marine Food Science and Technology; Faculty of Fisheries Sciences; Hokkaido University; Minato Hakodate Japan
| | - K. Yamazaki
- Laboratory of Marine Food Science and Technology; Faculty of Fisheries Sciences; Hokkaido University; Minato Hakodate Japan
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