Journal of Microbiology

Editor’s Choice articles are curated by our senior editors, who represent each section, to highlight research published in 2024 that they consider particularly interesting to our readers and/or important within the respective research area.

editor_pick

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

Microbial Ecology and Environmental Microbiology

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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Abstract PDF

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.

Citations

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Intestinal microbiota dysbiosis in bovine mastitis: Its role and strategies for prevention and control targeting intestinal microbiota
Shumin Li, Yue Zhang, Ping Liu, Peng Shen, Caijun Zhao, Naisheng Zhang, Xiaoyu Hu, Yunhe Fu
Animals and Zoonoses.2026;[Epub] CrossRef
Dietary Supplementation of Concentrate Improves Lactation Performance and Immune Function in Grazing Lactating Yaks Through Changes in Rumen Microbial Population and Metabolites
Lu Sun, Xun Wang, Hao Wang, Zhanhong Cui, Shatuo Chai, Shujie Liu, Shiheng Tao
Microorganisms.2026; 14(2): 278. CrossRef
The microbiome’s influence on obesity: mechanisms and therapeutic potential
Dawit Adisu Tadese, James Mwangi, Lei Luo, Hao Zhang, Xiaoshan Huang, Brenda B. Michira, Shengwen Zhou, Peter Muiruri Kamau, Qiumin Lu, Ren Lai
Science China Life Sciences.2025; 68(3): 657. CrossRef
Mitigating enteric methane emissions: An overview of methanogenesis, inhibitors and future prospects
Xin Xie, Yurong Cao, Qiushuang Li, Qi Li, Xingze Yang, Rong Wang, Xiumin Zhang, Zhiliang Tan, Bo Lin, Min Wang
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
Journal of Dairy Science.2025; 108(7): 7576. CrossRef
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
Veterinary Sciences.2025; 12(3): 234. CrossRef
Integrated multi-omics to elucidate the interplay between rumen microorganisms and host metabolism in Hu sheep supplemented with herbal preparations
Chunhui Wang, Qiao Li, Xingcai Qi, Huihui Wang, Yi Wu, Keyan Ma, Juanjuan Song, Zilong Liu, Youji Ma, Garret Suen
mSphere.2025;[Epub] CrossRef
Investigation on the action mechanisms of taurine on rumen microbial crude protein synthesis and nitrogen metabolism in beef steers using sodium sulfate as a contrast
Manman Fan, Jinming Hu, Cheng Liu, Shuo Zhang, Yufeng Liu, Guangyong Zhao
Animal Nutrition.2025; 22: 1. CrossRef
Sex-specific microbiota associations with backfat thickness, eye muscle area, and rumen fermentation in Qinchuan cattle
Yueting Pan, Gege Sun, Guo Li, Shuaicheng Chen, Haibing Liu, Huaxuan Li, Chugang Mei, Wucai Yang, Linsen Zan
BMC Microbiology.2025;[Epub] CrossRef
Growth performance, meat quality, rumen morphometrics and microbiota of finishing bulls fed diets supplemented with oregano essential oils
Stella Dokou, Ilias Giannenas, Ioanna Stylianaki, Eleftherios Bonos, Vangelis Economou, Georgios Arsenos
Animal Feed Science and Technology.2025; 327: 116405. CrossRef
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
Frontiers in Microbiology.2025;[Epub] CrossRef
The interaction between rumen microbiota and neurotransmitters plays an important role in the adaptation of phenological changes in Tibetan sheep
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
BMC Veterinary Research.2025;[Epub] CrossRef
Effects of Grazing in a Low Deciduous Forest on Rumen Microbiota and Volatile Fatty Acid Production in Lambs
Raúl Ávila-Cervantes, Pedro González-Pech, Carlos Sandoval-Castro, Felipe Torres-Acosta, José Ramos-Zapata, Mónica Galicia-Jiménez, Ramón Pacheco-Arjona
Animals.2025; 15(11): 1565. CrossRef
Metagenomic sequencing reveals the taxonomic and functional characteristics of rumen microorganisms in Dongliu buffalo
Wenwen Lu, Jinling Hua, Min Zhang, Longfei Yan, Huwei Zhao, Xiaokang Lv
Scientific Reports.2025;[Epub] CrossRef
The Effect of Sodium Humate on Sheep In Vitro Fermentation Characteristics and Rumen Bacterial Community
Na Yin, Yuchao Hu, Xiangting Cai, Long Gao, Wenwen Wang, Yuan Wang, Jingwei Qi
Microorganisms.2025; 13(6): 1266. CrossRef
A refined comparative mouse model of acute and chronic atopic dermatitis
Jinok Kwak, Hyunok Doo, Eun Sol Kim, Gi Beom Keum, Sumin Ryu, Yejin Choi, Juyoun Kang, Haram Kim, Yeongjae Chae, Sheena Kim, Ju-Hoon Lee, Hyeun Bum Kim
Journal of Animal Science and Technology.2025; 67(3): 636. CrossRef
Effect of Diet and Lifestyle Changes on Gut Microbial Diversity in Healthy Adolescents
Juyoun Kang, Yejin Choi, Gi Beom Keum, Hyunok Doo, Jinok Kwak, Haram Kim, Yeongjae Chae, Suyoung Lee, Hyunjin Yang, Sheena Kim, Xingmin Sun, Hyeun Bum Kim, Soo Jin Yoo
Journal of Microbiology and Biotechnology.2025;[Epub] CrossRef
Understanding the diversity and roles of the canine gut microbiome
Haram Kim, Yeongjae Chae, Jin Ho Cho, Minho Song, Jinok Kwak, Hyunok Doo, Yejin Choi, Juyoun Kang, Hyunjin Yang, Suyoung Lee, Gi Beom Keum, Suphot Wattanaphansak, Sheena Kim, Hyeun Bum Kim
Journal of Animal Science and Biotechnology.2025;[Epub] CrossRef
The ins and outs of integrative digestive biology
Carol Bucking, John S. Terblanche, Matthew D. Regan
Journal of Experimental Biology.2025;[Epub] CrossRef
Analysis of the Microbiota of Milk from Holstein–Friesian Dairy Cows Fed a Microbial Supplement
Bronwyn E. Campbell, Mohammad Mahmudul Hassan, Timothy Olchowy, Shahab Ranjbar, Martin Soust, Orlando Ramirez-Garzon, Rafat Al Jassim, Robert J. Moore, John I. Alawneh
Animals.2025; 15(14): 2124. CrossRef
Complete genome sequence of Lactiplantibacillus plantarum strain GA_C_14 with potential characteristics applicable in the swine industry
Sumin Ryu, Hyunok Doo, Eun Sol Kim, Gi Beom Keum, Jinok Kwak, Sriniwas Pandey, Yejin Choi, Juyoun Kang, Sheena Kim, Hyeun Bum Kim, Ju-Hoon Lee
Journal of Animal Science and Technology.2025; 67(4): 944. CrossRef
Heated drinking water in winter improves growth performance of male Hu sheep by modulating rumen quorum sensing and metabolites, and enhancing serum antioxidant capacity
Chang Liu, Lingyan Li, Jiaqi Dai, Mingren Qu, Kehui Ouyang, Qinghua Qiu
Animal Bioscience.2025; 38(10): 2280. CrossRef
Artificial Intelligence in Microbiome Research and Beyond: Connecting Human Health, Animal Husbandry, and Aquaculture
Silvio Rizzi, Giulio Saroglia, Violeta Kalemi, Simona Rimoldi, Genciana Terova
Applied Sciences.2025; 15(17): 9781. CrossRef
Bovine Lymphocyte Intestinal Retention Defect (BLIRD): a novel recessive immunogenetic disorder in Holstein cattle
Lucie Dutheil, Blandine Gausseres, Florian Besnard, Laurence Guzylack-Piriou, Yanad Abou Monsef, Nicolas Gaide, Lisa Arnalot, Fabien Corbiere, Marie Gaborit, Frédéric Launay, Agnès Poujade, Aurélien Capitan, Gilles Foucras
Veterinary Quarterly.2025;[Epub] CrossRef
Self-reported hopefulness and cognitive function: the moderating effect of physical activity in older adults without cognitive impairment
Boung Chul Lee, Young Min Choe, Ji-Hyun Kim, Hye Ji Choi, Guk-Hee Suh, Shin Gyeom Kim, Hyun Soo Kim, Jaeuk Hwang, Dahyun Yi, Jee Wook Kim
Frontiers in Aging Neuroscience.2025;[Epub] CrossRef
Effects of Oregano Essential Oil and/or Yeast Cultures on the Rumen Microbiota of Crossbred Simmental Calves
Ting Liu, Zhihao Luo, Tao Zhang, Huan Chen, Xuejiao Yi, Jiang Hu, Bingang Shi, Yuxi An, Changze Cui, Xiangyan Wang
Animals.2024; 14(24): 3710. CrossRef
Host-Associated Microbiome
Woo Jun Sul
Journal of Microbiology.2024; 62(3): 135. CrossRef
GnRH Immunocastration in Male Xizang Sheep: Impacts on Rumen Microbiome and Metabolite Profiles for Enhanced Health and Productivity
Xiaoming Zhang, Tianzeng Song, Guiqiong Liu, Jing Wu, Yangzong Zhaxi, Shehr Bano Mustafa, Khuram Shahzad, Xiaoying Chen, Wangsheng Zhao, Xunping Jiang
Animals.2024; 14(20): 2942. CrossRef
Gut Akkermansia muciniphila, Prevotellaceae, and Enterobacteriaceae spp. as Possible Markers in Women-Related Nutritional and Clinical Trials: Familial Mediterranean Fever Disease
Astghik Pepoyan
Women's Health Reports.2024; 5(1): 785. CrossRef
Exploring the Spatial Variation in the Microbiota and Bile Acid Metabolism of the Compound Stomach in Intensively Farmed Yaks
Shichun He, Zaimei Yuan, Sifan Dai, Zibei Wang, Shusheng Zhao, Bin Zhang, Huaming Mao, Dongwang Wu
Microorganisms.2024; 12(10): 1968. CrossRef
Investigation of the impact of multi-strain probiotics containing Saccharomyces cerevisiae on porcine production
Sheena Kim, Jinho Cho, Gi Beom Keum, Jinok Kwak, Hyunok Doo, Yejin Choi, Juyoun Kang, Haram Kim, Yeongjae Chae, Eun Sol Kim, Minho Song, Hyeun Bum Kim
Journal of Animal Science and Technology.2024; 66(5): 876. CrossRef
The Effects of Mixed Inoculum Storage Time on In Vitro Rumen Fermentation Characteristics, Microbial Diversity, and Community Composition
Chang Liu, Jing Ge, Jiaqi Dai, Mingren Qu, Kehui Ouyang, Qinghua Qiu
Animals.2024; 15(1): 5. CrossRef

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.

Citations

Citations to this article as recorded by

Rapid and selective disruption of photosystem I in toxic cyanobacteria protects aquatic ecosystem health
Wonjae Kim, Yerim Park, Yongjun Son, Nayeon Yoo, Eui-Hwan Chung, Woojun Park
Journal of Hazardous Materials.2026; 501: 140736. CrossRef
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
HABS-BLOCKS© Inhibited Microcystis and Planktothrix and Reduced Microcystin Concentrations in a Lake Water Mesocosm Study
Cameron Gastaldo, Stephen Vesper
Microorganisms.2025; 13(5): 1074. CrossRef
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
Utilizing allelopathy from the invasive plant Solidago canadensis to control Microcystis aeruginosa blooms: An integrated metabolomic and bioassay approach
Miao Wu, Huiyuan Liu, Jiaxin Shen, Zhaohui Xie, Siyuan Yang, Jiahui Guo, Yijiang Liu, Huiting Lian, Dingli Wang
Journal of Hazardous Materials.2025; 499: 140043. 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
Microorganisms.2024; 12(10): 2035. CrossRef
Host-Associated Microbiome
Woo Jun Sul
Journal of Microbiology.2024; 62(3): 135. CrossRef

Journal Articles

Delineating the Acquired Genetic Diversity and Multidrug Resistance in Alcaligenes from Poultry Farms and Nearby Soil: Abhilash Bhattacharjee, Anil Kumar Singh; J. Microbiol. 2024;62(7):511-523. Published online June 21, 2024; DOI: https://doi.org/10.1007/s12275-024-00129-w

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Abstract PDF

Alcaligenes faecalis is one of the most important and clinically significant environmental pathogens, increasing in importance due to its isolation from soil and nosocomial environments. The Gram-negative soil bacterium is associated with skin endocarditis, bacteremia, dysentery, meningitis, endophthalmitis, urinary tract infections, and pneumonia in patients. With emerging antibiotic resistance in A. faecalis, it has become crucial to understand the origin of such resistance genes within this clinically significant environmental and gut bacterium. In this research, we studied the impact of antibiotic overuse in poultry and its effect on developing resistance in A. faecalis. We sampled soil and faecal materials from five poultry farms, performed whole genome sequencing & analysis and identified four strains of A. faecalis. Furthermore, we characterized the genes in the genomic islands of A. faecalis isolates. We found four multidrug-resistant A. faecalis strains that showed resistance against vancomycin (MIC >1000 μg/ml), ceftazidime (50 μg/ml), colistin (50 μg/ml) and ciprofloxacin (50 μg/ml). From whole genome comparative analysis, we found more than 180 resistance genes compared to the reference sequence. Parts of our assembled contigs were found to be similar to different bacteria which included pbp1A and pbp2 imparting resistance to amoxicillin originally a part of Helicobacter and Bordetella pertussis. We also found the Mycobacterial insertion element IS6110 in the genomic islands of all four genomes. This prominent insertion element can be transferred and induce resistance to other bacterial genomes. The results thus are crucial in understanding the transfer of resistance genes in the environment and can help in developing regimes for antibiotic use in the food and poultry industry.

Citations

Citations to this article as recorded by

First Case of Respiratory Infection in Rabbits Caused by Alcaligenes faecalis in Romania
Vlad Iorgoni, Ionica Iancu, Ionela Popa, Alexandru Gligor, Gabriel Orghici, Bogdan Sicoe, Corina Badea, Cristian Dreghiciu, Călin Pop, Timea Bochiș, Janos Degi, Luminita Costinar, Corina Pascu, Viorel Herman
Veterinary Sciences.2025; 12(1): 33. CrossRef

Autotrophy to Heterotrophy: Shift in Bacterial Functions During the Melt Season in Antarctic Cryoconite Holes: Aritri Sanyal, Runa Antony, Gautami Samui, Meloth Thamban; J. Microbiol. 2024;62(8):591-609. Published online May 30, 2024; DOI: https://doi.org/10.1007/s12275-024-00140-1

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Abstract PDF

Microbes residing in cryoconite holes (debris, water, and nutrient-rich ecosystems) on the glacier surface actively participate in carbon and nutrient cycling. Not much is known about how these communities and their functions change during the summer melt-season when intense ablation and runoff alter the influx and outflux of nutrients and microbes. Here, we use high-throughput-amplicon sequencing, predictive metabolic tools and Phenotype MicroArray techniques to track changes in bacterial communities and functions in cryoconite holes in a coastal Antarctic site and the surrounding fjord, during the summer season. The bacterial diversity in cryoconite hole meltwater was predominantly composed of heterotrophs (Proteobacteria) throughout the season. The associated functional potentials were related to heterotrophic-assimilatory and -dissimilatory pathways. Autotrophic Cyanobacterial lineages dominated the debris community at the beginning and end of summer, while heterotrophic Bacteroidota- and Proteobacteria-related phyla increased during the peak melt period. Predictive functional analyses based on taxonomy show a shift from predominantly phototrophy-related functions to heterotrophic assimilatory pathways as the melt-season progressed. This shift from autotrophic to heterotrophic communities within cryoconite holes can affect carbon drawdown and nutrient liberation from the glacier surface during the summer. In addition, the flushing out and export of cryoconite hole communities to the fjord could influence the biogeochemical dynamics of the fjord ecosystem.

Citations

Citations to this article as recorded by

Biogeography of Cryoconite Bacterial Communities Across Continents
Qianqian Ge, Zhiyuan Chen, Yeteng Xu, Wei Zhang, Guangxiu Liu, Tuo Chen, Binglin Zhang
Microorganisms.2026; 14(1): 162. CrossRef
Post-glacial microbial succession and carbon sequestration processes: insights from recent research
Wenmei Li, Shichang Kang, Wasim Sajjad
Environmental Sciences Europe.2025;[Epub] 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

Cultivation of Diverse Novel Marine Bacteria from Deep Ocean Sediment Using Spent Culture Supernatant of Ca. Bathyarchaeia Enrichment: Sidra Erum Ishaq, Tariq Ahmad, Lewen Liang, Ruize Xie, Tiantian Yu, Yinzhao Wang, Fengping Wang; J. Microbiol. 2024;62(8):611-625. Published online July 10, 2024; DOI: https://doi.org/10.1007/s12275-024-00145-w

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Most microorganisms resist pure cultivation under conventional laboratory conditions. One of the primary issues for this un-culturability is the absence of biologically produced growth-promoting factors in traditionally defined growth media. However, whether cultivating microbes by providing spent culture supernatant of pivotal microbes in the growth medium can be an effective approach to overcome this limitation is still an under-explored area of research. Here, we used the spent culture medium (SCM) method to isolate previously uncultivated marine bacteria and compared the efficiency of this method with the traditional cultivation (TC) method. In the SCM method, Ca. Bathyarchaeia-enriched supernatant (10%) was used along with recalcitrant organic substrates such as lignin, humic acid, and organic carbon mixture. Ca. Bathyarchaeia, a ubiquitous class of archaea, have the capacity to produce metabolites, making their spent culture supernatant a key source to recover new bacterial stains. Both cultivation methods resulted in the recovery of bacterial species from the phyla Pseudomonadota, Bacteroidota, Actinomycetota, and Bacillota. However, our SCM approach also led to the recovery of species from rarely cultivated groups, such as Planctomycetota, Deinococcota, and Balneolota. In terms of the isolation of new taxa, the SCM method resulted in the cultivation of 80 potential new strains, including one at the family, 16 at the genus, and 63 at the species level, with a novelty ratio of ~ 35% (80/219). In contrast, the TC method allowed the isolation of ~ 10% (19/171) novel strains at species level only. These findings suggest that the SCM approach improved the cultivation of novel and diverse bacteria.

Citations

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Engineering the phycosphere: fundamental concepts and tools for the bottom-up design of microalgal-bacterial consortia
Austin Semple, Jagroop Pandhal
Applied Phycology.2025; 6(1): 21. CrossRef
Darkness to Discovery: A Comprehensive Mini-Review on Culturable and Non-Culturable Microbial Diversity from Deep Sea
Abhay B. Fulke, Nilkanth Sharma, Jayshree Nadekar
Microbial Ecology.2025;[Epub] CrossRef
The bacterial community of the freshwater bryozoan Cristatella mucedo and its secondary metabolites production potential
Inmaculada Tocino-Márquez, Martin Zehl, Joana Séneca, Petra Pjevac, Manuel Felkl, Christian F. W. Becker, Alexander Loy, Thomas Rattei, Andrew N. Ostrovsky, Sergey B. Zotchev
Scientific Reports.2025;[Epub] CrossRef
Uncertainty Analysis of Biogas Generation and Gas Hydrate Accumulations in the Baiyun Sag, South China Sea
Pibo Su, Jinqiang Liang, Huai Cheng, Yaoyao Lv, Wei Zhang, Zuofei Zhu
Microorganisms.2024; 13(1): 5. CrossRef

Different Adaption Strategies of Abundant and Rare Microbial Communities in Sediment and Water of East Dongting Lake: Yabing Gu, Junsheng Li, Zhenghua Liu, Min Zhang, Zhaoyue Yang, Huaqun Yin, Liyuan Chai, Delong Meng, Nengwen Xiao; J. Microbiol. 2024;62(10):829-843. Published online October 22, 2024; DOI: https://doi.org/10.1007/s12275-024-00171-8

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The dynamics of aquatic microbes is of great importance for comprehending the acclimatisation and evolution of microorganisms in lake ecology. However, little is known about the adaption strategies of microbial communities in East Dongting Lake, which had special and complexity geographical characteristics. A semi-enclosed lake area (A) and a waterway connected to Yangtze River (B) both existed in the lake zone. Here, we investigated bacterial and fungal community diversity, community network and community assembly processes in sediment and water. The results indicated that the proportion of OTU numbers and their relative abundance for rare and abundant taxa were different obviously between sediment and water, but not between bacteria and fungi. However, abundant subcommunities dominated the shifts of bacterial community diversity and structure in A region, while rare subcommunities for fungal community diversity. Compared to fungal community, bacterial network was more compact and more key stones were identified as rare taxa. In addition, stochastic processes (dispersal limitation) drove the community assembly of abundant and rare subcommunities, but the effects of deterministic processes (including variable and heterogeneous selections) affected more on rare rather than abundant taxa. Partial Mantel test further indicated that the effect of environmental factors was a stronger force in shaping abundant bacterial subcommunities (TOC, NH₄⁺-N, TN, and ORP) and rare fungal subcommunities (ORP). Environmental factors explained more of the variation in bacterial community structure than that in fungal community structure, although they had additional effects on fungal community diversity and community assembly. Moreover, bacterial community affected the fungal community as a biotic factor in water. This research provided new insights into better understanding of microbial communities in the complex environment of the East Dongting Lake.

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Bacterial and environmental factors had alternatively dominant effects on ecosystem multifunctionality of river–lake continuum: A rate-focused study
Xiujun Wang, Caixia Peng, Mengyuan Li, Junxiang Cheng, Ligang Xu, Qinglong L. Wu, Jin Zeng
Ecological Indicators.2026; 182: 114416. CrossRef
Analysis of soil microbial diversity of Miscanthus lutarioriparius communities in different areas of Dongting Lake
Zixuan Yu, Peng Zhu, Bo Li, Hong-Ge Qian, Qingqing Hu, Sai Yang
Frontiers in Environmental Science.2026;[Epub] CrossRef
Diversity patterns and community assembly of the microbial community of periphyton in an urban Fenhe River under seasonal changes
Kangxu Zhao, Hanjie Huang, Wei Wang, Xudong Liu, Junping Lv, Zhengyu Hu, Ying Shi, Shulian Xie, Jia Feng
Journal of Environmental Chemical Engineering.2025; 13(5): 118148. CrossRef
The assembly processes and network characteristics of bacterial, fungal and archaeal communities in the middle Yangtze River and river-connected lakes
Fenglin Wang, Si Li, Pinjian Li, Chuanzhe Feng, Zhijie Zhao, Yulong Yang, Fulei Han, An Xue, Zhenshan Li, Peng Han
Frontiers in Microbiology.2025;[Epub] CrossRef

The Impact of Makgeolli Consumption on Gut Microbiota: An Enterotype-Based Preliminary Study: Gyungcheon Kim, Seongok Kim, Hayan Jung, Seohyun Kang, Gwoncheol Park, Hakdong Shin; J. Microbiol. 2024;62(11):965-972. Published online October 16, 2024; DOI: https://doi.org/10.1007/s12275-024-00176-3

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Makgeolli, a traditional Korean liquor, contains components such as lactic acid bacteria and dietary fiber, which can induce changes in the gut microbiome. Since variations in microbiome responses may exist between enterotypes-classifications based on the dominant bacterial populations in the gut-we hypothesized that the consumption of makgeolli leads to enterotype-dependent differences in gut microbial structures among healthy participants. This study aimed to determine the effect of makgeolli consumption on gut microbial structures by stratifying all participants into two enterotype groups: Bacteroides-dominant type (B-type, n = 7) and Prevotella-dominant type (P-type, n = 4). The B-type showed an increase in alpha diversity, while no significant difference was observed in the P-type following makgeolli consumption. The composition of gut microbiota significantly changed in the B-type, whereas no noticeable alteration was observed in the P-type after makgeolli consumption. Notably, Prevotella exhibited the most significant changes only in the P-type. In line with the increased abundance of Prevotella, the genes associated with carbohydrate metabolism, including pentose/glucuronate interconversions, fructose/mannose metabolism, starch/sucrose metabolism and amino sugar/nucleotide sugar metabolism were significantly enriched following makgeolli consumption in the P-type. These findings suggest that makgeolli consumption induces enterotype-dependent alterations in gut microbial composition and metabolic pathways, highlighting the potential for personalized dietary interventions.

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The prebiotic potential of dietary onion extracts: shaping gut microbial structures and promoting beneficial metabolites
Yebeen Yoo, Seongok Kim, WonJune Lee, Jinwoo Kim, Bokyung Son, Kwang Jun Lee, Hakdong Shin, Aviâja Lyberth Hauptmann
mSystems.2025;[Epub] CrossRef
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Ruijian Wang, Jin Shen, Chunqing Han, Xiaodong Shi, Yan Gong, Xiping Hu, Zhongtang Jia, Miaomiao Wang, Yu Wu
Nutrients.2025; 17(9): 1513. CrossRef
Modulation of Gut Microbiota by Cacao: Insights from an In Vitro Model
Jinshil Kim, Sunil Jung, Gyungcheon Kim, Jinwoo Kim, Bokyung Son, Hakdong Shin
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Description of Streptococcus dentalis sp. nov., Streptococcus gingivalis sp. nov., and Streptococcus lingualis sp. nov., Isolated from Human Oral Cavities: Beom-Jin Goo, Young-Sik Choi, Do-Hun Gim, Su-Won Jeong, Jee-Won Choi, Hojun Sung, Jae-Yun Lee, Jin-Woo Bae; J. Microbiol. 2024;62(11):973-983. Published online November 12, 2024; DOI: https://doi.org/10.1007/s12275-024-00178-1

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We isolated three novel strains, S1^T, S2^T, and S5^T, from human oral cavities and identified them as distinct novel species. All these strains are facultatively anaerobic, Gram-stain-positive, and non-flagellated bacteria. Their optimal growth conditions for these strains were observed in Columbia broth (CB) at 37 °C, pH 7.0, and in the absence of NaCl. Phylogenetic analyses, employing the 16S rRNA gene and whole-genome sequencing, confirmed that all three strains belong to the genus Streptococcus. The 16S rRNA gene sequences of strains S1^T, S2^T, and S5^T showed the highest similarities to Streptococcus parasanguinis, 98.57%, 99.05%, and 99.05%, respectively, and the orthologous average nucleotide identity (OrthoANI) values between the three strains and S. parasanguinis were 93.82%, 93.67%, and 94.04%, respectively. The pairwise OrthoANI values between the novel strains were 94.37% (S1^T-S2^T), 95.03% (S2^T-S5^T), and 94.71% (S1^T-S5^T). All strains had C_20:1 ω9c and summed feature 8 (C_18:1 ω7c and/or C_18:1 ω6c) as major cellular fatty acids. Additionally, diphosphatidylglycerol (DPG) and hydroxyphosphatidylethanolamine (OH-PE) were identified as major polar lipids. Menaquinone was undetected in all strains. The results from the phylogenetic, phenotypic, chemotaxonomic, and genotypic analyses collectively indicated that strains S1^T, S2^T, and S5^T represent three distinct novel species within the genus Streptococcus, and we propose the names Streptococcus dentalis sp. nov. for strain S1^T (= KCTC 21234^T = JCM 36526^T), Streptococcus gingivalis sp. nov. for strain S2^T (= KCTC 21235^T = JCM 36527^T), and Streptococcus lingualis sp. nov. for strain S5^T (= KCTC 21236^T = JCM 36528^T).

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Validation List no. 223. Valid publication of new names and new combinations effectively published outside the IJSEM
Aharon Oren, Markus Göker
International Journal of Systematic and Evolutionary Microbiology .2025;[Epub] CrossRef

Rhodobacteraceae are Prevalent and Ecologically Crucial Bacterial Members in Marine Biofloc Aquaculture: Meora Rajeev, Jang-Cheon Cho; J. Microbiol. 2024;62(11):985-997. Published online November 15, 2024; DOI: https://doi.org/10.1007/s12275-024-00187-0

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Abstract PDF

Bioflocs are microbial aggregates primarily composed of heterotrophic bacteria that play essential ecological roles in maintaining animal health, gut microbiota, and water quality in biofloc aquaculture systems. Despite the global adoption of biofloc aquaculture for shrimp and fish cultivation, our understanding of biofloc microbiota-particularly the dominant bacterial members and their ecological functions-remains limited. In this study, we employed integrated metataxonomic and metagenomic approaches to demonstrate that the family Rhodobacteraceae of Alphaproteobacteria consistently dominates the biofloc microbiota and plays essential ecological roles. We first analyzed a comprehensive metataxonomic dataset consisting of 200 16S rRNA gene amplicons collected across three Asian countries: South Korea, China, and Vietnam. Taxonomic investigation identified Rhodobacteraceae as the dominant and consistent bacterial members across the datasets. The predominance of this taxon was further validated through metagenomics approaches, including read taxonomy and read recruitment analyses. To explore the ecological roles of Rhodobacteraceae, we applied genome-centric metagenomics, reconstructing 45 metagenome-assembled genomes. Functional annotation of these genomes revealed that dominant Rhodobacteraceae genera, such as Marivita, Ruegeria, Dinoroseobacter, and Aliiroseovarius, are involved in vital ecological processes, including complex carbohydrate degradation, aerobic denitrification, assimilatory nitrate reduction, ammonium assimilation, and sulfur oxidation. Overall, our study reveals that the common practice of carbohydrate addition in biofloc aquaculture systems fosters the growth of specific heterotrophic bacterial communities, particularly Rhodobacteraceae. These bacteria contribute to maintaining water quality by removing toxic nitrogen and sulfur compounds and enhance animal health by colonizing gut microbiota and exerting probiotic effects.

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