Isolation and characterization of a novel lytic phage K14-2 infecting diverse species of the genus Klebsiella and Raoultella
Multi-drug-resistant bacteria pose a significant global threat to public health, particularly among patients with critical nosocomial infection. Notably, the genera Klebsiella and Raoultella are of concern due to their association with human infections and the transfer of antibiotic-resistance genes...
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Frontiers Media S.A.
2025-01-01
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| Series: | Frontiers in Microbiology |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fmicb.2024.1491516/full |
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| author | Seomin Kang Jeong-Eun Han Young-Sik Choi In-Chul Jeong Jin-Woo Bae Jin-Woo Bae Jin-Woo Bae |
| author_facet | Seomin Kang Jeong-Eun Han Young-Sik Choi In-Chul Jeong Jin-Woo Bae Jin-Woo Bae Jin-Woo Bae |
| author_sort | Seomin Kang |
| collection | DOAJ |
| description | Multi-drug-resistant bacteria pose a significant global threat to public health, particularly among patients with critical nosocomial infection. Notably, the genera Klebsiella and Raoultella are of concern due to their association with human infections and the transfer of antibiotic-resistance genes. Phage therapy has recently garnered attention as a novel approach to treating these infections. However, the efficacy of this method relies on phages with a broad host range. In this study, the phage K14-2 with a wide host range was isolated from a river water sample using Klebsiella pneumoniae as the host. The biological properties of the phage were characterized by assessing its multiplicity of infection, killing curve, one-step growth curve, and stability across different pH levels and temperatures. The morphological analysis revealed that the phage closely resembled myovirus. The host range included 15 strains across 6 species from Klebsiella, Raoultella, and Escherichia genera. The genome of K14-2 was found to be double-stranded DNA, comprising 175,759 base pairs with a GC content of 41.8%. Genome annotation revealed 280 protein-coding genes, of which 96 had assigned functions. The phage with the highest genomic similarity to K14-2 was vB_KpM-Milk. Phylogenetic trees constructed based on the major capsid protein revealed that the phage belonged to the genus Slopekvirus of the Straboviridae family. Given these characteristics, the discovery of the novel phage K14-2, with its broad host range, holds potential for enhancing the effectiveness of phage therapy in future studies. |
| format | Article |
| id | doaj-art-aa019a50a4f24c768a566ad241355cd4 |
| institution | Kabale University |
| issn | 1664-302X |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Microbiology |
| spelling | doaj-art-aa019a50a4f24c768a566ad241355cd42025-01-17T06:50:50ZengFrontiers Media S.A.Frontiers in Microbiology1664-302X2025-01-011510.3389/fmicb.2024.14915161491516Isolation and characterization of a novel lytic phage K14-2 infecting diverse species of the genus Klebsiella and RaoultellaSeomin Kang0Jeong-Eun Han1Young-Sik Choi2In-Chul Jeong3Jin-Woo Bae4Jin-Woo Bae5Jin-Woo Bae6Department of Biology, College of Science, Kyung Hee University, Seoul, Republic of KoreaDepartment of Biology, College of Science, Kyung Hee University, Seoul, Republic of KoreaDepartment of Biology, College of Science, Kyung Hee University, Seoul, Republic of KoreaDepartment of Biology, College of Science, Kyung Hee University, Seoul, Republic of KoreaDepartment of Biology, College of Science, Kyung Hee University, Seoul, Republic of KoreaDepartment of Biomedical and Pharmaceutical Sciences, Kyung Hee University, Seoul, Republic of KoreaDepartment of Life and Nanopharmaceutical Sciences, Kyung Hee University, Seoul, Republic of KoreaMulti-drug-resistant bacteria pose a significant global threat to public health, particularly among patients with critical nosocomial infection. Notably, the genera Klebsiella and Raoultella are of concern due to their association with human infections and the transfer of antibiotic-resistance genes. Phage therapy has recently garnered attention as a novel approach to treating these infections. However, the efficacy of this method relies on phages with a broad host range. In this study, the phage K14-2 with a wide host range was isolated from a river water sample using Klebsiella pneumoniae as the host. The biological properties of the phage were characterized by assessing its multiplicity of infection, killing curve, one-step growth curve, and stability across different pH levels and temperatures. The morphological analysis revealed that the phage closely resembled myovirus. The host range included 15 strains across 6 species from Klebsiella, Raoultella, and Escherichia genera. The genome of K14-2 was found to be double-stranded DNA, comprising 175,759 base pairs with a GC content of 41.8%. Genome annotation revealed 280 protein-coding genes, of which 96 had assigned functions. The phage with the highest genomic similarity to K14-2 was vB_KpM-Milk. Phylogenetic trees constructed based on the major capsid protein revealed that the phage belonged to the genus Slopekvirus of the Straboviridae family. Given these characteristics, the discovery of the novel phage K14-2, with its broad host range, holds potential for enhancing the effectiveness of phage therapy in future studies.https://www.frontiersin.org/articles/10.3389/fmicb.2024.1491516/fullbacteriophagephageKlebsiella pneumoniaeKlebsiellaRaoultellaSlopekvirus |
| spellingShingle | Seomin Kang Jeong-Eun Han Young-Sik Choi In-Chul Jeong Jin-Woo Bae Jin-Woo Bae Jin-Woo Bae Isolation and characterization of a novel lytic phage K14-2 infecting diverse species of the genus Klebsiella and Raoultella Frontiers in Microbiology bacteriophage phage Klebsiella pneumoniae Klebsiella Raoultella Slopekvirus |
| title | Isolation and characterization of a novel lytic phage K14-2 infecting diverse species of the genus Klebsiella and Raoultella |
| title_full | Isolation and characterization of a novel lytic phage K14-2 infecting diverse species of the genus Klebsiella and Raoultella |
| title_fullStr | Isolation and characterization of a novel lytic phage K14-2 infecting diverse species of the genus Klebsiella and Raoultella |
| title_full_unstemmed | Isolation and characterization of a novel lytic phage K14-2 infecting diverse species of the genus Klebsiella and Raoultella |
| title_short | Isolation and characterization of a novel lytic phage K14-2 infecting diverse species of the genus Klebsiella and Raoultella |
| title_sort | isolation and characterization of a novel lytic phage k14 2 infecting diverse species of the genus klebsiella and raoultella |
| topic | bacteriophage phage Klebsiella pneumoniae Klebsiella Raoultella Slopekvirus |
| url | https://www.frontiersin.org/articles/10.3389/fmicb.2024.1491516/full |
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