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Explorative Study on Isolation and Characterization of a Microviridae G4 Bacteriophage, EMCL318, against Multi-Drug-resistant Escherichia coli 15-318.

ABSTRACT: Bacteriophages screened and isolated from sewage water samples exhibited antibacterial activities against multi-drug-resistant Escherichia coli strains. Five different water samples from Canadian habitats such as Kamloops Wastewater Treatment Center, Domtar, the Pacific Ocean, Bisaro Anima Cave, and alkali ponds, were used in this study. Four Enterobacteriaceae strains including one non-resistant and three clinical multi-drug Escherichia coli strains (E. coli 15-102, E. coli 15-124, and E. coli 15-318) were selected as target bacteria to screen for the bacteriophages from these collected water samples. Seeded agar assay technique was implemented for the screening. It was found that only sewage water sample exhibited a significant number of plaques count with the E. coli 15-318 (1.82 × 10² plaques/plate) cells in comparison to E. coli non-resistant strain K12 (8 plaques/plate). The phage did not produce plaques in the E. coli 15-124 and E. coli 15-102 strains. The bacteriophage, designated EMCL318, was isolated, purified, characterized, and identified to belong to the G4 species of the Family Microviridae, GenBank accession number MG563770. This is an explorative study conducted in order to reveal the viruses as alternative potentials to fight against emerging and existing multi-drug-resistant infectious diseases.

SUBMITTER: Ghosh S

PROVIDER: S-EPMC6316680 | biostudies-literature | 2018 Oct

REPOSITORIES: biostudies-literature

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Explorative Study on Isolation and Characterization of a Microviridae G4 Bacteriophage, EMCL318, against Multi-Drug-resistant Escherichia coli 15-318.

Ghosh Soumya S Persad Emma E Shiue Ting-Yun TY Lam Cindy C Islam Afsana A Mascibroda Lauren G LG Sherman Michael B MB Smith Thomas T Cheeptham Naowarat N

Antibiotics (Basel, Switzerland) 20181026 4

Bacteriophages screened and isolated from sewage water samples exhibited antibacterial activities against multi-drug-resistant Escherichia coli strains. Five different water samples from Canadian habitats such as Kamloops Wastewater Treatment Center, Domtar, the Pacific Ocean, Bisaro Anima Cave, and alkali ponds, were used in this study. Four Enterobacteriaceae strains including one non-resistant and three clinical multi-drug Escherichia coli strains (E. coli 15-102, ...[more]

PMID: 30373114

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Project description:BackgroundAntibiotic resistance in Escherichia coli, a member of the Enterobacteriaceae, is of particular concern because it is the most common (Gram-negative) pathogen causing nosocomial and community infections. Researchers are now considering the use of phages for the control of various antibiotic-resistant bacterial infections.ObjectivesThe purpose of this study was to isolate and characterize a novel pathogenic/lytic phage that targets multi-drug resistant (MDR) E. coli 3, and to investigate its effectiveness at lysing this bacterium.Materials and methodsA clinical strain of E. coli 3 was identified based on its 16S rRNA sequencing and its antibiotic resistance profile was determined by the disc diffusion method. A bacteriophage was isolated from wastewater and its various characteristics, such as host range, heat tolerance, pH stability, one step growth, total protein content, and genome size, were determined. The antibacterial property of the phage was determined against log-phase bacterial planktonic cells at 37°C.ResultsThe bacteriophage, designated MJ1, was isolated by testing against a clinical MDR E. coli 3 strain. The MJ1 phage showed a wide range of heat and pH stability. The phage morphology, determined by transmission electron microscopy, revealed a structure comprised of a head (108 ± 0.2 nm long by 128 ± 0.5 nm wide) and a contractile tail (123 ± 0.5 nm long by 15 - 26 nm wide). These features placed the MJ1 phage in the family Myoviridae and the order Caudovirales. Eleven structural proteins (17 to 200 kDa) for this phage were detected by sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE). A double stranded DNA, approximately 32 kb, in size was detected for this phage on agarose gels. The phage efficacy against E. coli 3 planktonic cells was also investigated. The MJ1 phage demonstrated a very good capability to reduce the numbers of E. coli 3 planktonic cells, as determined by a change in the bacterial growth (an optical density decrease at 600 nm from 0.40 to 0.12).ConclusionsMJ1 phage has much potential for use in phage therapy and other applications.

Dataset Information

Explorative Study on Isolation and Characterization of a Microviridae G4 Bacteriophage, EMCL318, against Multi-Drug-resistant Escherichia coli 15-318.

Publications

Explorative Study on Isolation and Characterization of a <i>Microviridae</i> G4 Bacteriophage, EMCL318, against Multi-Drug-resistant <i>Escherichia coli</i> 15-318.

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