Article
Agricultural Engineering
Saloni Rishi, Ispreet Kaur, Mariya Naseem, Vivek Kumar Gaur, Sandhya Mishra, Suchi Srivastava, Harvinder Singh Saini, Pankaj Kumar Srivastava
Summary: Free cyanide, a hazardous pollutant released from steel industries, can be remediated using a consortium of Trichoderma saturnisporum and Trichoderma citrinoviride. These microorganisms displayed increased growth and degradation activity in the presence of 20 mg-CN L-1, with degradation rates of over 99% within 3 days. FTIR analysis showed changes in functional groups on microbial cell walls after cyanide treatment.
BIORESOURCE TECHNOLOGY
(2023)
Article
Microbiology
Feiyue Lou, Charles Obinwanne Okoye, Lu Gao, Huifang Jiang, Yanfang Wu, Yongli Wang, Xia Li, Jianxiong Jiang
Summary: This study conducted whole-genome sequencing of two novel bacterial strains, Klebsiella michiganensis EF4 and K. oxytoca ETN19, to investigate their genomic functions and degradation pathways of phenanthrene and pyrene. The EF4 strain degraded approximately 80% of phenanthrene and 60% of pyrene after 28 days of cultivation. The combination of EF4 and ETN19 showed even higher phenanthrene degradation efficiency, following a first-level kinetic model with a half-life of approximately 6 days. The two bacterial genomes contained enzymes and gene clusters associated with PAHs degradation, as well as transcription factors that regulate the expression of PAHs degradation genes and enzymes.
MICROBIOLOGICAL RESEARCH
(2023)
Article
Biochemistry & Molecular Biology
B. O. Itakorode, R. E. Okonji, N. Torimiro
Summary: In this study, K. oxytoca synthesized rhodanese was immobilized on alginate-glutaraldehyde beads. The immobilized enzyme showed better thermal stability, higher activity retention, and improved degradation efficiency compared to the free enzyme, suggesting its potential in bioremediation of cyanide polluted environments.
BIOCATALYSIS AND BIOTRANSFORMATION
(2023)
Article
Microbiology
Abdulkhaleg M. Alfaify, Mushtaq Ahmad Mir, Sulaiman A. Alrumman
Summary: In this study, a strain of Klebsiella oxytoca with efficient pyrene degradation ability was isolated from petroleum-contaminated soil. Through various experiments and analysis, the mechanism and pathway of pyrene degradation by K. oxytoca were elucidated, demonstrating its potential for soil aromatic hydrocarbon removal.
ARCHIVES OF MICROBIOLOGY
(2022)
Article
Pharmacology & Pharmacy
Beata Weber-Dabrowska, Maciej Zaczek, Malgorzata Lobocka, Marzanna Lusiak-Szelachowska, Barbara Owczarek, Filip Orwat, Norbert Lodej, Aneta Skaradzinska, Lukasz Laczmanski, Dariusz Martynowski, Marta Kaszowska, Andrzej Gorski
Summary: In recent years, multidrug-resistant strains of Klebsiella pneumoniae have become a global concern and bacteriophage therapy may provide a potential solution. This study evaluated the properties and effectiveness of bacteriophages against Klebsiella strains, identifying promising candidates for therapeutic purposes. Additionally, historical phages were examined, including one with lytic activity that has been maintained for nearly 60 years.
Article
Environmental Sciences
Tao Zhang, Shuang-yan Xu, Hui Lin, Jian Yang, Zhuo-qun Zhao, Damia Barcelo, Hua-bao Zheng
Summary: In this study, a new tylosin-degrading strain, TYL-T1, was isolated and its degradation mechanism was revealed through transcriptome and metabolite analysis. The results demonstrate the potential of TYL-T1 in removing tylosin from the environment.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Microbiology
Tufail Bashir, Rowan D. Brackston, Christopher Waite, Ioly Kotta-Loizou, Matthew R. Carey, Christoph Engl, Martin Buck, Jorg Schumacher
Summary: This study investigates the molecular origins of phenotypic heterogeneity in clonal bacterial batch cultures under extreme low-nitrogen stress. The researchers found high heterogeneity of nifHDK gene expression, which codes for the structural genes of nitrogenase, in the model diazotroph Klebsiella oxytoca. Through analysis and experiments, they identified the likely molecular origins of this heterogeneity and discovered the significant effect of the regulatory gene ginK on nifHDK variance. This understanding can inform biotechnology strategies and potentially have implications for nitrogen fixation in natural soil environments.
Article
Microbiology
Nagender Ledala, Mishika Malik, Karim Rezaul, Sara Paveglio, Anthony Provatas, Aaron Kiel, Melissa Caimano, Yanjiao Zhou, Jonathan Lindgren, Kristyna Krasulova, Peter Illes, Zdenek Dvorak, Sandhya Kortagere, Sabine Kienesberger, Amar Cosic, Lisa Poeltl, Ellen L. Zechner, Subho Ghosh, Sridhar Mani, Justin D. Radolf, Adam P. Matson
Summary: In this study, it was shown that bacterial indole acts as a multifunctional mitigator of pathogenicity by suppressing toxin production, enhancing conversion of tilimycin to tilivalline, and activating PXR.
Review
Microbiology
Nakul Neog, Upasana Phukan, Minakshi Puzari, Mohan Sharma, Pankaj Chetia
Summary: Klebsiella oxytoca is emerging as an important opportunistic pathogen causing hospital infections, especially posing a high risk for immunocompromised patients. It can lead to a variety of diseases, including colitis and infective endocarditis, in addition to common urinary and respiratory tract infections. The bacterium exhibits resistance to a wide range of antibiotics.
CURRENT MICROBIOLOGY
(2021)
Article
Microbiology
Christopher J. Waite, Anya Lindstrom Battle, Mark H. Bennett, Matthew R. Carey, Chun K. Hong, Ioly Kotta-Loizou, Martin Buck, Jorg Schumacher
Summary: Free-living nitrogen-fixing bacteria can improve growth yields of non-leguminous plants and address nutrient imbalances in crop production. Nitrogen fixation is a resource-costly adaptation regulated by signaling processes, and reinvestment of fixed nitrogen is essential for sustained nitrogenase activity. The study highlights the quantitative resource allocation required for successful nitrogen fixation in free-living diazotrophs.
FRONTIERS IN MICROBIOLOGY
(2021)
Review
Microbiology
Jing Yang, Haiyan Long, Ya Hu, Yu Feng, Alan McNally, Zhiyong Zong
Summary: Klebsiella oxytoca is a complex of nine species that can cause various infections and is increasingly becoming resistant to antibiotics, posing a potential threat to human health.
CLINICAL MICROBIOLOGY REVIEWS
(2022)
Article
Biotechnology & Applied Microbiology
Peng Lu, Huiying Huang, Yixiao Sun, Mengyao Qiang, Yan Zhu, Mengjiao Cao, Xue Peng, Bo Yuan, Zhaozhong Feng
Summary: In this study, two bacterial strains, identified as Acinetobacter johnsonii and Klebsiella oxytoca, were isolated from marine sediments and shown to efficiently degrade 4-HBA and other lignin-derived compounds under anaerobic conditions. The immobilization of these strains demonstrated their potential for bioremediation of 4-HBA in aqueous environments. Soils inoculated with the strains showed higher 4-HBA degradation rates, indicating their effectiveness in anaerobic soil. These findings contribute to the development of anaerobic bioremediation systems for 4-HBA.
Article
Energy & Fuels
Uttarini Pathak, Patali Mogalapalli, Dalia Dasgupta Mandal, Tamal Mandal
Summary: The efficacy of mixed bacterial cultures in treating coke oven wastewater was investigated. The study evaluated the impact of initial concentrations of phenol and cyanide on the growth and treatment by the bacterial cultures. The results showed that the mixed cultures had a high removal efficiency for phenol and cyanide in the wastewater.
BIOMASS CONVERSION AND BIOREFINERY
(2023)
Article
Pediatrics
Michelle Bous, Malte Tielsch, Cihan Papan, Elisabeth Kaiser, Regine Weber, Joerg Ingo Baumbach, Soeren L. Becker, Michael Zemlin, Sybelle Goedicke-Fritz
Summary: The study developed a method for analyzing volatile organic compound (VOC) profiles of different bacterial species using MCC/IMS. The MCC/IMS analysis showed clear differentiation between Klebsiella pneumoniae (KP) and Klebsiella oxytoca (KO), as well as high sensitivity, specificity, and positive predictive values for identifying these bacteria. The results suggest that MCC/IMS may be a useful tool for in vitro diagnostics.
FRONTIERS IN PEDIATRICS
(2023)
Article
Microbiology
Haiyan Long, Ya Hu, Yu Feng, Zhiyong Zong
Summary: The Klebsiella oxytoca complex consists of nine closely related species that cause human infections, with K. oxytoca and Klebsiella michiganensis being more commonly associated with human infections and carrying more virulence genes.
ANTIMICROBIAL AGENTS AND CHEMOTHERAPY
(2022)