Journal of Microbiology

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Evolutionary Microbiology and Systematics
Microbial Ecology and Environmental Microbiology
Microbial Physiology and Biochemistry
Microbial Genetics, Genomics and Molecular Biology (Eukaryote)
Microbial Genetics, Genomics and Molecular Biology (Prokaryote)
Microbial Pathogenesis and Host-Microbe Interaction
Synthetic Microbiology and Biotechnology
Virology

Journal Articles

[Protocol] Use of Cas9 Targeting and Red Recombination for Designer Phage Engineering: Shin-Yae Choi , Danitza Xiomara Romero-Calle , Han-Gyu Cho , Hee-Won Bae , You-Hee Cho; J. Microbiol. 2024;62(1):1-10. Published online February 1, 2024; DOI: https://doi.org/10.1007/s12275-024-00107-2

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Bacteriophages (phages) are natural antibiotics and biological nanoparticles, whose application is significantly boosted by recent advances of synthetic biology tools. Designer phages are synthetic phages created by genome engineering in a way to increase the benefits or decrease the drawbacks of natural phages. Here we report the development of a straightforward genome engineering method to efficiently obtain engineered phages in a model bacterial pathogen, Pseudomonas aeruginosa. This was achieved by eliminating the wild type phages based on the Streptococcus pyogenes Cas9 (SpCas9) and facilitating the recombinant generation based on the Red recombination system of the coliphage λ (λRed). The producer (PD) cells of P. aeruginosa strain PAO1 was created by miniTn7-based chromosomal integration of the genes for SpCas9 and λRed under an inducible promoter. To validate the efficiency of the recombinant generation, we created the fluorescent phages from a temperate phage MP29. A plasmid bearing the single guide RNA (sgRNA) gene for selectively targeting the wild type gp35 gene and the editing template for tagging the Gp35 with superfolder green fluorescent protein (sfGFP) was introduced into the PD cells by electroporation. We found that the targeting efficiency was affected by the position and number of sgRNA. The fluorescent phage particles were efficiently recovered from the culture of the PD cells expressing dual sgRNA molecules. This protocol can be used to create designer phages in P. aeruginosa for both application and research purposes.

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Pilin regions that select for the small RNA phages in Pseudomonas aeruginosa type IV pilus
Hee-Won Bae, Hyeong-Jun Ki, Shin-Yae Choi, You-Hee Cho, Kristin N. Parent
Journal of Virology.2025;[Epub] CrossRef
Synthetic and Functional Engineering of Bacteriophages: Approaches for Tailored Bactericidal, Diagnostic, and Delivery Platforms
Ola Alessa, Yoshifumi Aiba, Mahmoud Arbaah, Yuya Hidaka, Shinya Watanabe, Kazuhiko Miyanaga, Dhammika Leshan Wannigama, Longzhu Cui
Molecules.2025; 30(15): 3132. CrossRef
Characteristics of bioaerosols under high-ozone periods, haze episodes, dust storms, and normal days in Xi’an, China
Yiming Yang, Liu Yang, Xiaoyan Hu, Zhenxing Shen
Particuology.2024; 90: 140. CrossRef
Airborne desert dust and aeromicrobiology over the Turkish Mediterranean coastline
Dale W. Griffin, Nilgün Kubilay, Mustafa Koçak, Mike A. Gray, Timothy C. Borden, Eugene A. Shinn
Atmospheric Environment.2007; 41(19): 4050. CrossRef

Flavivirga spongiicola sp. nov. and Flavivirga abyssicola sp. nov., Isolated from Marine Environments: Sung-Hyun Yang , Mi-Jeong Park , Hyun-Myung Oh , Yeong-Jun Park , Kae Kyoung Kwon; J. Microbiol. 2024;62(1):11-19. Published online February 6, 2024; DOI: https://doi.org/10.1007/s12275-023-00102-z

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Two novel Gram-stain-negative, strictly-aerobic, rod-shaped (1.2 ± 3.4 μm × 0.3 ± 0.7 μm), and non-motile marine bacterial species, designated MEBiC05379T and MEBiC07777T, were isolated from a marine sponge Pseudaxinella sp. in Gangneung City and deep-sea sediments of the Ulleung basin in the East Sea of Korea, respectively. The 16S rRNA gene sequence analysis revealed high levels of similarities between these strains and members of the genus Flavivirga (97.0–98.4% sequence identities). Both novel strains revealed as mesophilic, neutrophilic in pH and slightly halophilic. Similar to those of other Flavivirga members, the primary cellular fatty acids of both strains were iso-C15:0, iso-C15:1 G, iso-C15:03-OH, and iso-C17:0 3-OH, with MEBiC05379T and MEBiC07777T containing relatively higher proportions of C12: 0 and summed feature 3 ( C16:1ω7c and/or C16: 1ω6c). In both taxa, the major isoprenoid quinone was MK-6. The DNA G + C contents of MEBiC05379T and MEBiC07777T genomes were 32.62 and 32.46 mol%, respectively. Compared to other members of Flavivirga, both strains exhibited similar DNA G + C ratio and fatty acids pattern, yet enzyme expression and carbon sources utilization pattern were different. Genomes of the genus Flavivirga showed enzyme preferences to fucoidan and sulfated galactans. Considering the monophyly rule, AAI values delineate the genus Flavivirga from adjacent genera calculated to be 76.0–78.7%. Based on the phenotypic, genomic and biochemical data, strains for MEBiC05379T and MEBiC07777T thus represent two novel species in the genus Flavivirga, for which the names Flavivirga spongiicola sp. nov. ( MEBiC05379T [= KCTC 92527 T = JCM 16662 T]), and Flavivirga abyssicola sp. nov. ( MEBiC07777T [= KCTC 92563 T = JCM 36477 T]) are proposed.

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Phycobium rhodophyticola gen. nov., sp. nov. and Aliiphycobium algicola gen. nov., sp. nov., isolated from the phycosphere of marine red algae
Jeong Min Kim, Woonhee Baek, Byeong Jun Choi, Hülya Bayburt, Jae Kyeong Lee, Sung Chul Lee, Che Ok Jeon
Journal of Microbiology.2025; 63(6): e2503014. CrossRef
Rubrivirga aquatilis sp. nov. and Rubrivirga halophila sp. nov., isolated from Korean coastal surface seawater
Jisoo Han, Yeonjung Lim, Mirae Kim, Jang-Cheon Cho
Journal of Microbiology.2025; 63(8): e2504017. CrossRef
Rhodobacteraceae are Prevalent and Ecologically Crucial Bacterial Members in Marine Biofloc Aquaculture
Meora Rajeev, Jang-Cheon Cho
Journal of Microbiology.2024; 62(11): 985. CrossRef
Validation List no. 220. Valid publication of new names and new combinations effectively published outside the IJSEM
Aharon Oren, Markus Göker
International Journal of Systematic and Evolutionary Microbiology .2024;[Epub] CrossRef
Optimization of Culture Medium for the Production of an Exopolysaccharide (p-CY02) with Cryoprotective Activity by Pseudoalteromonas sp. RosPo-2 from the Antarctic Sea
Pilsung Kang, Sung Jin Kim, Ha Ju Park, Il Chan Kim, Se Jong Han, Joung Han Yim
Journal of Microbiology and Biotechnology.2024; 34(5): 1135. CrossRef

LAMMER Kinase Governs the Expression and Cellular Localization of Gas2, a Key Regulator of Flocculation in Schizosaccharomyces pombe: Won-Hwa Kang , Yoon-Dong Park , Joo-Yeon Lim , Hee-Moon Park; J. Microbiol. 2024;62(1):21-31. Published online January 5, 2024; DOI: https://doi.org/10.1007/s12275-023-00097-7

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Abstract PDF: It was reported that LAMMER kinase in Schizosaccharomyces pombe plays an important role in cation-dependent and galactose-specific flocculation. Analogous to other flocculating yeasts, when cell wall extracts of the Δlkh1 strain were treated to the wild-type strain, it displayed flocculation. Gas2, a 1,3-β-glucanosyl transferase, was isolated from the EDTA-extracted cell-surface proteins in the Δlkh1 strain. While disruption of the gas2+ gene was not lethal and reduced the flocculation activity of the Δlkh1 strain, the expression of a secreted form of Gas2, in which the GPI anchor addition sequences had been removed, conferred the ability to flocculate upon the WT strain. The Gas2-mediated flocculation was strongly inhibited by galactose but not by glucose. Immunostaining analysis showed that the cell surface localization of Gas2 was crucial for the flocculation of fission yeast. In addition, we identified the regulation of mbx2+ expression by Lkh1 using RT-qPCR. Taken together, we found that Lkh1 induces asexual flocculation by regulating not only the localization of Gas2 but also the transcription of gas2+ through Mbx2.

Mycobacterium tuberculosis PE_PGRS45 (Rv2615c) Promotes Recombinant Mycobacteria Intracellular Survival via Regulation of Innate Immunity, and Inhibition of Cell Apoptosis: Tao Xu , Chutong Wang , Minying Li , Jing Wei , Zixuan He , Zhongqing Qian , Xiaojing Wang , Hongtao Wang; J. Microbiol. 2024;62(1):49-62. Published online February 9, 2024; DOI: https://doi.org/10.1007/s12275-023-00101-0

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Tuberculosis (TB), a bacterial infectious disease caused by Mycobacterium tuberculosis (M. tuberculosis), is a significant global public health problem. Mycobacterium tuberculosis expresses a unique family of PE_PGRS proteins that have been implicated in pathogenesis. Despite numerous studies, the functions of most PE_PGRS proteins in the pathogenesis of mycobacterium infections remain unclear. PE_PGRS45 (Rv2615c) is only found in pathogenic mycobacteria. In this study, we successfully constructed a recombinant Mycobacterium smegmatis (M. smegmatis) strain which heterologously expresses the PE_PGRS45 protein. We found that overexpression of this cell wall-associated protein enhanced bacterial viability under stress in vitro and cell survival in macrophages. MS_PE_PGRS45 decreased the secretion of pro-inflammatory cytokines such as IL-1β, IL-6, IL-12p40, and TNF-α. We also found that MS_PE_PGRS45 increased the expression of the anti-inflammatory cytokine IL-10 and altered macrophage-mediated immune responses. Furthermore, PE_PGRS45 enhanced the survival rate of M. smegmatis in macrophages by inhibiting cell apoptosis. Collectively, our findings show that PE_PGRS45 is a virulent factor actively involved in the interaction with the host macrophage.

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Evolution of the PE_PGRS Proteins of Mycobacteria: Are All Equal or Are Some More Equal than Others?
Bei Chen, Belmin Bajramović, Bastienne Vriesendorp, Herman Pieter Spaink
Biology.2025; 14(3): 247. CrossRef
Recent advances in research on Mycobacterium tuberculosis virulence factors and their role in pathogenesis
Ming-Rui Sun, Jia-Yin Xing, Xiao-Tian Li, Ren Fang, Yang Zhang, Zhao-Li Li, Ning-Ning Song
Journal of Microbiology, Immunology and Infection.2025; 58(5): 497. CrossRef
Rv2741 Promotes Mycobacterium Survival by Modulating Macrophage Function via the IL-1α-MAPK Axis
Xintong He, Yonglin He, Xichuan Deng, Nan Lu, Anlong Li, Sijia Gao, Shiyan He, Yuran Wang, Nanzhe Fu, Zijie Wang, Yuxin Nie, Lei Xu
ACS Infectious Diseases.2025; 11(3): 676. CrossRef
The PE/PPE family proteins of Mycobacterium tuberculosis: evolution, function, and prospects for tuberculosis control
Zhijing Zhang, Le Dong, Xin Li, Taibing Deng, Qinglan Wang
Frontiers in Immunology.2025;[Epub] CrossRef

Exploring the Therapeutic Potential of Scorpion‑Derived Css54 Peptide Against Candida albicans: Jonggwan Park , Hyeongsun Kim , Da Dam Kang , Yoonkyung Park; J. Microbiol. 2024;62(2):101-112. Published online April 8, 2024; DOI: https://doi.org/10.1007/s12275-024-00113-4

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Candida albicans (C. albicans) is one of the most common opportunistic fungi worldwide, which is associated with a high mortality rate. Despite treatment, C. albicans remains the leading cause of life-threatening invasive infections. Consequently, antimicrobial peptides (AMPs) are potential alternatives as antifungal agents with excellent antifungal activity. We previously reported that Css54, found in the venom of Centrurodies suffusus suffusus (C. s. suffusus) showed antibacterial activity against zoonotic bacteria. However, the antifungal activity of Css54 has not yet been elucidated. The obj!ective of this study was to identify the antifungal activity of Css54 against C. albicans and analyze its mechanism. Css54 showed high antifungal activity against C. albicans. Css54 also inhibited biofilm formation in fluconazole-resistant fungi. The antifungal mechanism of action of Css54 was investigated using membrane-related assays, including the membrane depolarization assay and analysis of the membrane integrity of C. albicans after treatment with Css54. Css54 induced reactive oxygen species (ROS) production in C. albicans, which affected its antifungal activity. Our results indicate that Css54 causes membrane damage in C. albicans, highlighting its value as a potential therapeutic agent against C. albicans infection.

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Animal-derived peptides from Traditional Chinese medicines: medicinal potential, mechanisms, and prospects
Jiahui Zhang, Siyi Li, Yueyi Qi, Jieyu Shen, Aijing Leng, Jialin Qu
Journal of Ethnopharmacology.2025; 349: 119872. CrossRef
Antimicrobial Potential of Scorpion-Venom-Derived Peptides
Zhiqiang Xia, Lixia Xie, Bing Li, Xiangyun Lv, Hongzhou Zhang, Zhijian Cao
Molecules.2024; 29(21): 5080. CrossRef
Synthetic Short Cryptic Antimicrobial Peptides as Templates for the Development of Novel Biotherapeutics Against WHO Priority Pathogen
Manjul Lata, Vrushti Telang, Pooja Gupta, Garima Pant, Mitra Kalyan, Jesu Arockiaraj, Mukesh Pasupuleti
International Journal of Peptide Research and Therapeutics.2024;[Epub] CrossRef

CA‑CAS‑01‑A: A Permissive Cell Line for Isolation and Live Attenuated Vaccine Development Against African Swine Fever Virus: Seung-Chul Lee , Yongkwan Kim , Ji-Won Cha , Kiramage Chathuranga , Niranjan Dodantenna , Hyeok-Il Kwon , Min Ho Kim , Weonhwa Jheong , In-Joong Yoon , Joo Young Lee , Sung-Sik Yoo , Jong-Soo Lee; J. Microbiol. 2024;62(2):125-134. Published online March 13, 2024; DOI: https://doi.org/10.1007/s12275-024-00116-1

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African swine fever virus (ASFV) is the causative agent of the highly lethal African swine fever disease that affects domestic pigs and wild boars. In spite of the rapid spread of the virus worldwide, there is no licensed vaccine available. The lack of a suitable cell line for ASFV propagation hinders the development of a safe and effective vaccine. For ASFV propagation, primary swine macrophages and monocytes have been widely studied. However, obtaining these cells can be time-consuming and expensive, making them unsuitable for mass vaccine production. The goal of this study was to validate the suitability of novel CA-CAS-01-A (CAS-01) cells, which was identified as a highly permissive cell clone for ASFV replication in the MA-104 parental cell line for live attenuated vaccine development. Through a screening experiment, maximum ASFV replication was observed in the CAS-01 cell compared to other sub-clones of MA-104 with 14.89 and log10 7.5 ± 0.15 Ct value and TCID50/ ml value respectively. When CAS-01 cells are inoculated with ASFV, replication of ASFV was confirmed by Ct value for ASFV DNA, HAD50/ ml assay, TCID50/ ml assay, and cytopathic effects and hemadsoption were observed similar to those in primary porcine alveolar macrophages after 5th passage. Additionally, we demonstrated stable replication and adaptation of ASFV over the serial passage. These results suggest that CAS-01 cells will be a valuable and promising cell line for ASFV isolation, replication, and development of live attenuated vaccines.

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Establishment of a highly sensitive porcine alveolar macrophage cell line for African swine fever virus
Xiangwan Lu, Xiadan Gong, Yingshuo Sun, Lang Gong, Yan Zhang
In Vitro Cellular & Developmental Biology - Animal.2025; 61(4): 425. CrossRef
Genetic and Pathogenic Characteristic of High Pathogenic Korean NADC34‐Like Porcine Reproductive and Respiratory Syndrome Virus
Sehyeong Ham, Chanhee Chae, Nan-hua Chen
Transboundary and Emerging Diseases.2025;[Epub] CrossRef
Efficient and modular reverse genetics system for rapid generation of recombinant severe acute respiratory syndrome coronavirus 2
Sojung Bae, Jinjong Myoung
Journal of Microbiology.2025; 63(7): e2504015. CrossRef
Development and characterization of high-efficiency cell-adapted live attenuated vaccine candidate against African swine fever
Min Ho Kim, Ashan Subasinghe, Yongkwan Kim, Hyeok-Il Kwon, Yehjin Cho, Kiramage Chathuranga, Ji-Won Cha, Ji-Yoon Moon, Ji-Hyeon Hong, Jin Kim, Seung-Chul Lee, Niranjan Dodantenna, Nuwan Gamage, W. A. Gayan Chathuranga, Yeonji Kim, In-Joong Yoon, Joo Young
Emerging Microbes & Infections.2024;[Epub] CrossRef

Reviews

Understanding the Diversity and Roles of the Ruminal Microbiome: Gi Beom Keum, Sriniwas Pandey, Eun Sol Kim, Hyunok Doo, Jinok Kwak, Sumin Ryu, Yejin Choi, Juyoun Kang, Sheena Kim, Hyeun Bum Kim; J. Microbiol. 2024;62(3):217-230. Published online April 25, 2024; DOI: https://doi.org/10.1007/s12275-024-00121-4

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The importance of ruminal microbiota in ruminants is emphasized, not only as a special symbiotic relationship with ruminants but also as an interactive and dynamic ecosystem established by the metabolites of various rumen microorganisms. Rumen microbial community is essential for life maintenance and production as they help decompose and utilize fber that is difcult to digest, supplying about 70% of the energy needed by the host and 60–85% of the amino acids that reach the small intestine. Bacteria are the most abundant in the rumen, but protozoa, which are relatively large, account for 40–50% of the total microorganisms. However, the composition of these ruminal microbiota is not conserved or constant throughout life and is greatly infuenced by the host. It is known that the initial colonization of calves immediately after birth is mainly infuenced by the mother, and later changes depending on various factors such as diet, age, gender and breed. The initial rumen microbial community contains aerobic and facultative anaerobic bacteria due to the presence of oxygen, but as age increases, a hypoxic environment is created inside the rumen, and anaerobic bacteria become dominant in the rumen microbial community. As calves grow, taxonomic diversity increases, especially as they begin to consume solid food. Understanding the factors afecting the rumen microbial community and their efects and changes can lead to the early development and stabilization of the microbial community through the control of rumen microorganisms, and is expected to ultimately help improve host productivity and efciency.

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Animal Nutrition.2025; 21: 84. CrossRef
International Symposium on Ruminant Physiology: Stochastic and deterministic factors that shape the rumen microbiome
Samodha C. Fernando, Seidu Adams, Andrew Lakamp, Matthew L. Spangler
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Genome analysis of Lactococcus taiwanensis strain K_LL001 with potential cellulose degrading functions
Eun Sol Kim, Jin Ho Cho, Minho Song, Sheena Kim, Gi Beom Keum, Hyunok Doo, Jinok Kwak, Sriniwas Pandey, Sumin Ryu, Yejin Choi, Juyoun Kang, Hyeun Bum Kim, Ju-Hoon Lee
Journal of Animal Science and Technology.2025; 67(1): 273. CrossRef
Dynamic Changes in Rumen Microbial Diversity and Community Composition Within Rumen Fluid in Response to Various Storage Temperatures and Preservation Times
Chang Liu, Jin Cheng, Yunong Xie, Kehui Ouyang, Mingren Qu, Ke Pan, Qinghua Qiu
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Chunhui Wang, Qiao Li, Xingcai Qi, Huihui Wang, Yi Wu, Keyan Ma, Juanjuan Song, Zilong Liu, Youji Ma, Garret Suen
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Evaluation of kefir consumption on gut microbial diversity in a healthy young population using full-length 16S rRNA sequencing
Yejin Choi, Gi Beom Keum, Juyoun Kang, Hyunok Doo, Jinok Kwak, Haram Kim, Yeongjae Chae, Suyoung Lee, Hyunjin Yang, Sheena Kim, Xingmin Sun, Hyeun Bum Kim, Soo Jin Yoo
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Wei Huang, Yuzhu Sha, Qianling Chen, Xiaowei Chen, Min Gao, Xiu Liu, Yapeng He, Xu Gao, Jiang Hu, Jiqing Wang, Shaobin Li, Zhiyun Hao, Yanyu He
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Biological and Chemical Approaches for Controlling Harmful Microcystis Blooms: Wonjae Kim, Yerim Park, Jaejoon Jung, Che Ok Jeon, Masanori Toyofuku, Jiyoung Lee, Woojun Park; J. Microbiol. 2024;62(3):249-260. Published online April 8, 2024; DOI: https://doi.org/10.1007/s12275-024-00115-2

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Abstract PDF

The proliferation of harmful cyanobacterial blooms dominated by Microcystis aeruginosa has become an increasingly serious problem in freshwater ecosystems due to climate change and eutrophication. Microcystis-blooms in freshwater generate compounds with unpleasant odors, reduce the levels of dissolved O₂, and excrete microcystins into aquatic ecosystems, potentially harming various organisms, including humans. Various chemical and biological approaches have thus been developed to mitigate the impact of the blooms, though issues such as secondary pollution and high economic costs have not been adequately addressed. Red clays and H₂O₂ are conventional treatment methods that have been employed worldwide for the mitigation of the blooms, while novel approaches, such as the use of plant or microbial metabolites and antagonistic bacteria, have also recently been proposed. Many of these methods rely on the generation of reactive oxygen species, the inhibition of photosynthesis, and/or the disruption of cellular membranes as their mechanisms of action, which may also negatively impact other freshwater microbiota. Nevertheless, the underlying molecular mechanisms of anticyanobacterial chemicals and antagonistic bacteria remain unclear. This review thus discusses both conventional and innovative approaches for the management of M. aeruginosa in freshwater bodies.

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Strong inhibitory effects of Desmodesmus sp. on Microcystis blooms: Potential as a biological control agent in aquaculture
Bo Yang, Yuhua Li, Zihan Wang, Zhiguang Yue, Junqi Wen, Xueqin Zhao, Hu Zhang, Xianfeng Wang, Xiufen Wang, Man Zhang
Aquaculture Reports.2025; 40: 102579. CrossRef
Field-scale artificial floating islands reduces cyanotoxin from residential raw sewage treatment basin
Zhaozhe Chen, Jiyoung Lee, Molly Mills, Abigail Volk, Ozeas S. Costa
Ecological Engineering.2025; 212: 107543. CrossRef
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Cameron Gastaldo, Stephen Vesper
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Synergistic radical-mediated algal inactivation via FeMoS2/ZnO-persulfate visible-light photocatalysis
Yingjian Ma, Yuxuan Tian, Ning Ding, Hong Liu
Composites Part B: Engineering.2025; 305: 112740. CrossRef
Isolation of a Novel Streptomyces sp. TH05 with Potent Cyanocidal Effects on Microcystis aeruginosa
Xuhan Wang, Siqi Zhu, Shenchen Tao, Shaoyong Zhang, Ruijun Wang, Liqin Zhang
Toxins.2025; 17(7): 354. CrossRef
Public goods-mediated bacterial interplay in aquatic ecosystems
Yerim Park, Wonjae Kim, Jihye Bae, Woojun Park
Water Research.2025; 287: 124310. CrossRef
Molecular mechanisms underlying the bloom-forming cyanobacterium Microcystis defence against predation by flagellates
Yan Chen, Xiao Zhang, Xinyang Bai, Yonglan Xu, Hangzhou Xu, Li Li
Journal of Water Process Engineering.2025; 77: 108611. CrossRef
Artificial Intelligence-Based Microfluidic Platform for Detecting Contaminants in Water: A Review
Yihao Zhang, Jiaxuan Li, Yu Zhou, Xu Zhang, Xianhua Liu
Sensors.2024; 24(13): 4350. CrossRef
Alleviation of H2O2 toxicity by extracellular catalases in the phycosphere of Microcystis aeruginosa
Yerim Park, Wonjae Kim, Yeji Cha, Minkyung Kim, Woojun Park
Harmful Algae.2024; 137: 102680. CrossRef
Extensive Genomic Rearrangement of Catalase-Less Cyanobloom-Forming Microcystis aeruginosa in Freshwater Ecosystems
Minkyung Kim, Jaejoon Jung, Wonjae Kim, Yerim Park, Che Ok Jeon, Woojun Park
Journal of Microbiology.2024; 62(11): 933. CrossRef
Laboratory-Simulated Inhibitory Effects of the Floating-Bed Plants on Microcystis aeruginosa and Their Microbial Communities’ Responses to Microcystins
Shuwen Zhang, Yuanpu Sha, Yuanyuan Tang, Longjie Li, Feihu Wang, Jing Dong, Xuejun Li, Yunni Gao, Xiaofei Gao, Huatao Yuan, Jingxiao Zhang
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Journal Articles

Saxibacter everestensis gen. nov., sp. nov., A Novel Member of the Family Brevibacteriaceae, Isolated from the North Slope of Mount Everest: Mao Tian, Shiyu Wu, Wei Zhang, Gaosen Zhang, Xue Yu, Yujie Wu, Puchao Jia, Binglin Zhang, Tuo Chen, Guangxiu Liu; J. Microbiol. 2024;62(4):277-284. Published online March 6, 2024; DOI: https://doi.org/10.1007/s12275-024-00108-1

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Abstract PDF: We isolated and analyzed a novel, Gram-stain-positive, aerobic, rod-shaped, non-motile actinobacterium, designated as strain ZFBP1038(T), from rock sampled on the north slope of Mount Everest. The growth requirements of this strain were 10-37 °C, pH 4-10, and 0-6% (w/v) NaCl. The sole respiratory quinone was MK-9, and the major fatty acids were anteiso-C(15:0) and iso-C(17:0). Peptidoglycan containing meso-diaminopimelic acid, ribose, and glucose were the major cell wall sugars, while polar lipids included diphosphatidyl glycerol, phosphatidyl glycerol, an unidentified phospholipid, and an unidentified glycolipid. A phylogenetic analysis based on 16S rRNA gene sequences showed that strain ZFBP1038(T) has the highest similarity with Spelaeicoccus albus DSM 26341( T) (96.02%). ZFBP1038(T) formed a distinct monophyletic clade within the family Brevibacteriaceae and was distantly related to the genus Spelaeicoccus. The G + C content of strain ZFBP1038(T) was 63.65 mol% and the genome size was 4.05 Mb. Digital DNA-DNA hybridization, average nucleotide identity, and average amino acid identity values between the genomes of strain ZFBP1038(T) and representative reference strains were 19.3-25.2, 68.0-71.0, and 52.8-60.1%, respectively. Phylogenetic, phenotypic, and chemotaxonomic characteristics as well as comparative genome analyses suggested that strain ZFBP1038(T) represents a novel species of a new genus, for which the name Saxibacter gen. nov., sp. nov. was assigned with the type strain Saxibacter everestensis ZFBP1038(T) (= EE 014( T) = GDMCC 1.3024( T) = JCM 35335( T)).

Sporosarcina jeotgali sp. nov., Sporosarcina oncorhynchi sp. nov., and Sporosarcina trichiuri sp. nov., Isolated from Jeotgal, a Traditional Korean Fermented Seafood: Ah-In Yang, Bora Kim, Sung-Hong Joe, Hae-In Joe, Hanna Choe, Ki Hyun Kim, Min Ok Jun, Na-Ri Shin; J. Microbiol. 2024;62(4):285-296. Published online April 8, 2024; DOI: https://doi.org/10.1007/s12275-024-00106-3

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Abstract PDF

Three novel, Gram-stain-positive, obligate aerobic, catalase- and oxidase-positive bacterial strains, designated B2O-1(T), T2O-4(T), and 0.2-SM1T-5(T), were isolated from jeotgal, a traditional Korean fermented seafood. Strains B2O-1(T), T2O-4(T), and 0.2-SM1T-5(T) exhibited distinct colony colors, characterized by pink, yellow, and red opaque circular colonies, respectively. Phylogenetic analysis revealed that three strains formed a paraphyletic clade within the genus Sporosarcina and shared < 99.0% similarity with Sporosarcina aquimarina KCTC 3840(T) and Sporosarcina saromensis KCTC 13119(T) in their 16S rRNA gene sequences. The three strains exhibiting Orthologous Average Nucleotide Identity values < 79.3% and digital DNA-DNA hybridization values < 23.1% within the genus Sporosarcina affirmed their distinctiveness. Strains B2O-1(T), T2O-4(T), and 0.2-SM1T-5(T) contained MK-7 as a sole respiratory menaquinone and A4α type peptidoglycan based on lysine with alanine, glutamic acid, and aspartic acid. The common polar lipids include diphosphatidylglycerol, phosphatidylglycerol, and phosphatidylethanolamine. Strain T2O-4(T) contained one unidentified phospholipid, whereas strain 0.2-SM1T-5(T) contained two unidentified phospholipids. Cellular fatty acid profiles, with C(15:0) anteiso as the major fatty acid, supported the affiliation of the three strains to the genus Sporosarcina. Based on the polyphasic characteristics, strains B2O-1(T) (= KCTC 43506(T) = JCM 36032(T)), T2O-4(T) (= KCTC 43489(T) = JCM 36031(T)), and 0.2-SM1T-5(T) (= KCTC 43519(T) = JCM 36034(T)) represent three novel species within the genus Sporosarcina, named Sporosarcina jeotgali sp. nov., Sporosarcina oncorhynchi sp. nov., and Sporosarcina trichiuri sp. nov., respectively.

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Notification of changes in taxonomic opinion previously published outside the IJSEM. List of Changes in Taxonomic Opinion no. 41
Aharon Oren, Markus Göker
International Journal of Systematic and Evolutionary Microbiology .2025;[Epub] CrossRef
Brevibacterium koreense sp. nov., a moderately halophilic bacterium isolated from jogae-jeotgal, a Korean fermented seafood
Sohee Nam, Yujin Kim, Min Ji Lee, Yeon Bee Kim, Jeong Ui Yun, Mi-Ja Jung, Hye Seon Song, Se Hee Lee, Seok-Jun Kim, Tae Woong Whon
International Journal of Systematic and Evolutionary Microbiology .2025;[Epub] CrossRef
Bacteroides celer sp. nov. and Bacteroides mucinivorans sp. nov., isolated from human feces, and the reclassification of Bacteroides koreensis Shin et al. 2017 and Bacteroides kribbi Shin et al. 2017 as later heterotypic synonyms of Bacteroides ovatus Egg
Ah-In Yang, Bora Kim, Woorim Kang, Hae-In Joe, Na-Ri Shin
Journal of Microbiology.2025; 63(6): e2502006. CrossRef
Validation List no. 220. Valid publication of new names and new combinations effectively published outside the IJSEM
Aharon Oren, Markus Göker
International Journal of Systematic and Evolutionary Microbiology .2024;[Epub] CrossRef

Vaccine Development for Severe Fever with Thrombocytopenia Syndrome Virus in Dogs: Seok-Chan Park, Da-Eun Jeong, Sun-Woo Han, Joon-Seok Chae, Joo-Yong Lee, Hyun-Sook Kim, Bumseok Kim, Jun-Gu Kang; J. Microbiol. 2024;62(4):327-335. Published online April 18, 2024; DOI: https://doi.org/10.1007/s12275-024-00119-y

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Abstract PDF

Severe fever with thrombocytopenia syndrome (SFTS) is a life-threatening viral zoonosis. The causative agent of this disease is the Dabie bandavirus, which is usually known as the SFTS virus (SFTSV). Although the role of vertebrates in SFTSV transmission to humans remains uncertain, some reports have suggested that dogs could potentially transmit SFTSV to humans. Consequently, preventive measures against SFTSV in dogs are urgently needed. In the present study, dogs were immunized three times at two-week intervals with formaldehyde-inactivated SFTSV with two types of adjuvants. SFTSV (KCD46) was injected into all dogs two weeks after the final immunization. Control dogs showed viremia from 2 to 4 days post infection (dpi), and displayed white pulp atrophy in the spleen, along with a high level of terminal deoxynucleotidyl transferase-mediated dUTP nick-end labelling assay (TUNEL) positive area. However, the inactivated SFTSV vaccine groups exhibited rare pathological changes and significantly reduced TUNEL positive areas in the spleen. Furthermore, SFTSV viral loads were not detected at any of the tested dpi. Our results indicate that both adjuvants can be safely used in combination with an inactivated SFTSV formulation to induce strong neutralizing antibodies. Inactivated SFTSV vaccines effectively prevent pathogenicity and viremia in dogs infected with SFTSV. In conclusion, our study highlighted the potential of inactivated SFTSV vaccination for SFTSV control in dogs.

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The immunogenicity and protection efficacy evaluation of mRNA vaccine candidate for severe fever with thrombocytopenia syndrome in mice
Da-Eun Jeong, Jack Yoon, Baek Kim, Jun-Gu Kang, Abdallah M. Samy
PLOS Neglected Tropical Diseases.2025; 19(4): e0012999. CrossRef
Efficient and modular reverse genetics system for rapid generation of recombinant severe acute respiratory syndrome coronavirus 2
Sojung Bae, Jinjong Myoung
Journal of Microbiology.2025; 63(7): e2504015. CrossRef
Current status of severe fever with thrombocytopenia syndrome in China (Review)
Hao Sun, Quanman Hu, Saiwei Lu, Yanyan Yang, Li Zhang, Jinzhao Long, Yuefei Jin, Haiyan Yang, Shuaiyin Chen, Guangcai Duan
International Journal of Molecular Medicine.2025; 56(5): 1. CrossRef

Review

Reverse Zoonotic Transmission of SARS-CoV-2 and Monkeypox Virus: A Comprehensive Review: Chiranjib Chakraborty, Manojit Bhattacharya, Md Aminul Islam, Hatem Zayed, Elijah Ige Ohimain, Sang-Soo Lee, Prosun Bhattacharya, Kuldeep Dhama; J. Microbiol. 2024;62(5):337-354. Published online May 23, 2024; DOI: https://doi.org/10.1007/s12275-024-00138-9

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Abstract PDF

Reverse zoonosis reveals the process of transmission of a pathogen through the human-animal interface and the spillback of the zoonotic pathogen. In this article, we methodically demonstrate various aspects of reverse zoonosis, with a comprehensive discussion of SARS-CoV-2 and MPXV reverse zoonosis. First, different components of reverse zoonosis, such as humans, different pathogens, and numerous animals (poultry, livestock, pets, wild animals, and zoo animals), have been demonstrated. Second, it explains the present status of reverse zoonosis with different pathogens during previous occurrences of various outbreaks, epidemics, and pandemics. Here, we present 25 examples from literature. Third, using several examples, we comprehensively illustrate the present status of the reverse zoonosis of SARS-CoV-2 and MPXV. Here, we have provided 17 examples of SARS-CoV-2 reverse zoonosis and two examples of MPXV reverse zoonosis. Fourth, we have described two significant aspects of reverse zoonosis: understanding the fundamental aspects of spillback and awareness. These two aspects are required to prevent reverse zoonosis from the current infection with two significant viruses. Finally, the One Health approach was discussed vividly, where we urge scientists from different areas to work collaboratively to solve the issue of reverse zoonosis.

Citations

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Phylogenetic analyses of the spread of Clade I MPOX in African and non-African nations
Chiranjib Chakraborty, Manojit Bhattacharya, Arpita Das, Ali S. Abdelhameed
Virus Genes.2025; 61(3): 265. CrossRef
Efficient and modular reverse genetics system for rapid generation of recombinant severe acute respiratory syndrome coronavirus 2
Sojung Bae, Jinjong Myoung
Journal of Microbiology.2025; 63(7): e2504015. CrossRef
Real-time malaria detection in the Amazon rainforest via drone-collected eDNA and portable qPCR
Yin Cheong Aden Ip, Luca Montemartini, Jia Jin Marc Chang, Andrea Desiderato, Nicolás D. Franco-Sierra, Christian Geckeler, Mailyn Adriana Gonzalez Herrera, Michele Gregorini, Meret Jucker, Steffen Kirchgeorg, Martina Lüthi, Elvira Mächler, Frederik Bendi
One Health.2025; 21: 101167. CrossRef
Development of a multiplex real-time PCR for the simultaneous detection of monkeypox virus clades I, II, and goatpox virus
Yongqiang Lin, Zijing Guo, Jinsong Chen, Xianwen Zhang, Long Zhou, Yanmin Li, Zhidong Zhang
Frontiers in Veterinary Science.2024;[Epub] CrossRef
Differential Impact of Spike Protein Mutations on SARS-CoV-2 Infectivity and Immune Evasion: Insights from Delta and Kappa Variants
Tae-Hun Kim, Sojung Bae, Jinjong Myoung
Journal of Microbiology and Biotechnology.2024; 34(12): 2506. CrossRef

Journal Article

A PadR family transcriptional repressor regulates the transcription of chromate efflux transporter in Enterobacter sp. Z1: Xueqi Huo, Zijie Zhou, Hongliang Liu, Gejiao Wang, Kaixiang Shi; J. Microbiol. 2024;62(5):355-365. Published online April 8, 2024; DOI: https://doi.org/10.1007/s12275-024-00117-0

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Abstract PDF

Chromium is a prevalent toxic heavy metal, and chromate [Cr(VI)] exhibits high mutagenicity and carcinogenicity. The presence of the Cr(VI) efflux protein ChrA has been identified in strains exhibiting resistance to Cr(VI). Nevertheless, certain strains of bacteria that are resistant to Cr(VI) lack the presence of ChrB, a known regulatory factor. Here, a PadR family transcriptional repressor, ChrN, has been identified as a regulator in the response of Enterobacter sp. Z1(CCTCC NO: M 2019147) to Cr(VI). The chrN gene is cotranscribed with the chrA gene, and the transcriptional expression of this operon is induced by Cr(VI). The binding capacity of the ChrN protein to Cr(VI) was demonstrated by both the tryptophan fluorescence assay and Ni-NTA purification assay. The interaction between ChrN and the chrAN operon promoter was validated by reporter gene assay and electrophoretic mobility shift assay. Mutation of the conserved histidine residues His14 and His50 resulted in loss of ChrN binding with the promoter of the chrAN operon. This observation implies that these residues are crucial for establishing a DNA-binding site. These findings demonstrate that ChrN functions as a transcriptional repressor, modulating the cellular response of strain Z1 to Cr(VI) exposure.

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High antimony resistance strain Enterobacter sp. Z1 mediates biomineralization of antimony trioxide
Zijie Zhou, Hongbo Yu, Gejiao Wang, Mingshun Li, Kaixiang Shi
Environment International.2025; 195: 109237. CrossRef

Reviews

The Role of Extracellular Vesicles in Pandemic Viral Infections: Woosung Shim, Anjae Lee, Jung-Hyun Lee; J. Microbiol. 2024;62(6):419-427. Published online June 25, 2024; DOI: https://doi.org/10.1007/s12275-024-00144-x

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Abstract PDF

Extracellular vesicles (EVs), of diverse origin and content, are membranous structures secreted by a broad range of cell types. Recent advances in molecular biology have highlighted the pivotal role of EVs in mediating intercellular communication, facilitated by their ability to transport a diverse range of biomolecules, including proteins, lipids, DNA, RNA and metabolites. A striking feature of EVs is their ability to exert dual effects during viral infections, involving both proviral and antiviral effects. This review explores the dual roles of EVs, particularly in the context of pandemic viruses such as HIV-1 and SARS-CoV-2. On the one hand, EVs can enhance viral replication and exacerbate pathogenesis by transferring viral components to susceptible cells. On the other hand, they have intrinsic antiviral properties, including activation of immune responses and direct inhibition of viral infection. By exploring these contrasting functions, our review emphasizes the complexity of EV-mediated interactions in viral pathogenesis and highlights their potential as targets for therapeutic intervention. The insights obtained from investigating EVs in the context of HIV-1 and SARS-CoV-2 provide a deeper understanding of viral mechanisms and pathologies, and offer a new perspective on managing and mitigating the impact of these global health challenges.

Citations

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Differential Impact of Spike Protein Mutations on SARS-CoV-2 Infectivity and Immune Evasion: Insights from Delta and Kappa Variants
Tae-Hun Kim, Sojung Bae, Jinjong Myoung
Journal of Microbiology and Biotechnology.2024; 34(12): 2506. CrossRef

Adenoviral Vector System: A Comprehensive Overview of Constructions, Therapeutic Applications and Host Responses: Anyeseu Park, Jeong Yoon Lee; J. Microbiol. 2024;62(7):491-509. Published online July 22, 2024; DOI: https://doi.org/10.1007/s12275-024-00159-4

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Abstract PDF

Adenoviral vectors are crucial for gene therapy and vaccine development, offering a platform for gene delivery into host cells. Since the discovery of adenoviruses, first-generation vectors with limited capacity have evolved to third-generation vectors flacking viral coding sequences, balancing safety and gene-carrying capacity. The applications of adenoviral vectors for gene therapy and anti-viral treatments have expanded through the use of in vitro ligation and homologous recombination, along with gene editing advancements such as CRISPR-Cas9. Current research aims to maintain the efficacy and safety of adenoviral vectors by addressing challenges such as pre-existing immunity against adenoviral vectors and developing new adenoviral vectors from rare adenovirus types and non-human species. In summary, adenoviral vectors have great potential in gene therapy and vaccine development. Through continuous research and technological advancements, these vectors are expected to lead to the development of safer and more effective treatments.

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International Journal of Pharmaceutics.2025; 668: 124941. CrossRef
Enhancing precision in cancer treatment: the role of gene therapy and immune modulation in oncology
Emile Youssef, Brandon Fletcher, Dannelle Palmer
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Lisha Ou, Mekedlawit T. Setegne, Jeandele Elliot, Fangfang Shen, Laura M. K. Dassama
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Intestinal mucus: the unsung hero in the battle against viral gastroenteritis
Waqar Saleem, Ateeqa Aslam, Mehlayl Tariq, Hans Nauwynck
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Chromatin structure and gene transcription of recombinant p53 adenovirus vector within host
Duo Ning, Yuqing Deng, Simon Zhongyuan Tian
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Multi-level ROS regulation to activate innate and adaptive immune therapies
Ke-Ke Feng, Cheng-Lei Li, Yi-Fan Tu, Shi-Cheng Tian, Rui Xiong, Bai-Sheng Sa, Jing-Wei Shao
Chemical Engineering Journal.2025; 515: 163429. CrossRef
Genetically modified cell membrane proteins in tissue engineering and regenerative medicine
Yilin Bao, Yue Hu, Mengxuan Hao, Qinmeng Zhang, Guoli Yang, Zhiwei Jiang
Biofabrication.2025; 17(3): 032004. CrossRef
Surgical treatment of otogenic vertigo
Tian Yu, Xiaohong Chen
European Archives of Oto-Rhino-Laryngology.2025;[Epub] CrossRef
Chimeric Element-Regulated MRI Reporter System for Mediation of Glioma Theranostics
Qian Hu, Jie Huang, Xiangmin Zhang, Haoru Wang, Xiaoying Ni, Huiru Zhu, Jinhua Cai
Cancers.2025; 17(14): 2349. CrossRef
Molecular Engineering of Virus Tropism
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International Journal of Molecular Sciences.2024; 25(20): 11094. CrossRef
Antisolvent 3D Printing of Gene-Activated Scaffolds for Bone Regeneration
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International Journal of Molecular Sciences.2024; 25(24): 13300. CrossRef

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