Article
Food Science & Technology
Bum Soo Park, Chong-Sung Park, Yuna Shin, Sungae Yoon, Myung-Soo Han, Yoon-Ho Kang
Summary: This study found that two bacteria, Aeromonas bestiarum HYD0802-MK36 and Pseudomonas syringae KACC10292(T), are capable of killing the harmful cyanobacteria, Microcystis aeruginosa. These bacteria exhibit different algicidal modes.
Article
Environmental Sciences
Jinjie Huang, Mingchen Xu, Wenyi Zhang, Linqiang Mao
Summary: This study evaluates the potential application of the algicidal bacteria XMC, isolated from native snails, and shows that it has strong algicidal ability and environmental adaptability, making it a promising solution for inhibiting harmful algal blooms.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Microbiology
Luwei Zheng, Hong Lin, Barathan Balaji-Prasath, Yuping Su, Ying Wang, Yi Zheng, Guanglang Yu
Summary: This study confirmed the algicidal properties of high-efficiency marine alginolytic bacteria, identified as belonging to the species Pseudomonas sp., on red tide species G. catenatum and K. mikimotoi. The ps3 strain showed the best algae-lysis effect, reaching 83.0% and 78.3% for G. catenatum and K. mikimotoi, respectively. The use of algaecide may be a rapid and effective method to control dinoflagellate blooms.
FRONTIERS IN MICROBIOLOGY
(2023)
Article
Materials Science, Biomaterials
Wei Guo, Yongjie Wang, Pengqi Wan, Hao Wang, Li Chen, Shaokun Zhang, Chunsheng Xiao, Xuesi Chen
Summary: Bacterial infections and antibiotic resistance have become a global healthcare crisis. Cationic amphiphilic dendrons designed and synthesized showed excellent antimicrobial activities, depending highly on the length of the hydrophobic alkyl chain. The identified prime candidate exhibited rapid and broad-spectrum bactericidal activity, disrupting the integrity of a pathogen's membrane and promoting wound healing.
JOURNAL OF MATERIALS CHEMISTRY B
(2022)
Article
Environmental Sciences
Shuhe Chen, Miyu Haga, Ichiro Imai, Ryuichi Sakai, Masaki J. Fujita
Summary: In this study, a bacterial strain Go58 with potent algicidal activity against bloom-forming cyanobacterium was discovered. The strain is closely related to Pseudomonas protegens and produces pyoluteorins, which exhibit high toxicity against cyanobacteria. This bacterial group has the potential to be a safe biological countermeasure for controlling cyanobacterial blooms.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Food Science & Technology
He Zhang, Yan Xie, Rongzhen Zhang, Zhongliang Zhang, Xinglong Hu, Yao Cheng, Ruozhen Geng, Zengling Ma, Renhui Li
Summary: Harmful cyanobacterial blooms pose a threat to aquatic ecosystems and public health globally. Searching for high efficiency algicidal bacteria has become an important task. In this study, a bacterial strain named Streptomyces sp. HY exhibited highly algicidal activity against Microcystis aeruginosa and other cyanobacterial strains, while showing minimal impact on green algae. The algicidal mechanism involved damages to the photosynthesis system, morphological injury of algal cells, oxidative stress, and dysfunction of the DNA repair system. HY treatment also reduced the expression levels of genes related to microcystin biosynthesis. Overall, Streptomyces sp. HY shows promise as a candidate for controlling harmful cyanobacterial blooms.
Article
Ecology
Lydia-Ann J. Ghuneim, Ruma Raghuvanshi, Kerri A. Neugebauer, Douglas V. Guzior, Martin H. Christian, Bella Schena, Jeremiah M. Feiner, Alicia Castillo-Bahena, Jenna Mielke, Marc McClelland, Douglas Conrad, Isaac Klapper, Tianyu Zhang, Robert A. Quinn
Summary: This study investigates the effect of antibiotics on host-associated microbial communities using cultured sputum samples from cystic fibrosis patients. The researchers found that in addition to the predicted outcomes, antibiotic treatment can also lead to shifts in community composition and an increase in total bacterial load. A mathematical model reveals that the increase in bacterial load is due to the antibiotic-mediated release of pathogens by anaerobic fermentation. Metagenomic sequencing of clinical samples further confirms these findings.
Article
Infectious Diseases
Tomasz Bogiel, Malgorzata Prazynska, Joanna Kwiecinska-Pirog, Agnieszka Mikucka, Eugenia Gospodarek-Komkowska
Summary: The study compared the frequency of selected enzymatic virulence factor genes among non-duplicated carbapenem-resistant P. aeruginosa isolates, finding a higher prevalence of alkaline protease gene and a 37.4% detection rate for neuraminidase-1 gene. Significant differences in the prevalence of lasB and nan1 were observed between MBL-positive and MBL-negative strains.
Article
Biotechnology & Applied Microbiology
Yuanyuan Hu, Xiaojia Huang, Xiaowei Cheng, Sicheng Li, Yulin Zou, Weibin Pan
Summary: Cylindrospermopsis raciborskii is an invasive species that poses a serious threat to drinking water sources and human health. Bacillus cereus strain L7 was found to have efficient algicidal activity against C. raciborskii FACHB-1503, with the highest activity observed during the decline phase of L7 culture. The coculture system showed optimal conditions at 30 degrees C, pH = 8, and a light-dark cycle.
ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
(2023)
Article
Food Science & Technology
Jianzhou Li, Xiaohua Chen, Ziyan Xie, Lin Liang, Anping Li, Chao Zhao, Yuxi Wen, Zaixiang Lou
Summary: This study screened lactic acid bacteria (LAB) with strong antagonistic ability against Pseudomonas aeruginosa (P. aeruginosa) and evaluated the regulatory mechanism of LAB against P. aeruginosa. The results showed that the selected LAB strains inhibited the growth, biofilm formation, and pyocyanin expression of P. aeruginosa, and promoted the expression of autoinducer-2. Lactipantibacillus plantarum (Lp. plantarum) LPyang affected the metabolic processes of P. aeruginosa by influencing metabolic substances, such as LysoPC, oxidized glutathione, betaine, etc. These findings provide new insights into the antagonistic activity of Lp. plantarum LPyang against P. aeruginosa.
Article
Microbiology
Nicholas Teran, Stephanie L. Egge, Kady Phe, Rodrigo P. Baptista, Vincent H. Tam, William R. Miller, Jared A. Silverman
Summary: This study reports a clinical case of cefiderocol-resistant P. aeruginosa and identifies mutations not previously reported, suggesting potential novel pathways to cefiderocol resistance.
ANTIMICROBIAL AGENTS AND CHEMOTHERAPY
(2023)
Article
Multidisciplinary Sciences
Thomas F. Durand-Reville, Alita A. Miller, John P. O'Donnell, Xiaoyun Wu, Mark A. Sylvester, Satenig Guler, Ramkumar Iyer, Adam B. Shapiro, Nicole M. Carter, Camilo Velez-Vega, Samir H. Moussa, Sarah M. McLeod, April Chen, Angela M. Tanudra, Jing Zhang, Janelle Comita-Prevoir, Jan A. Romero, Hoan Huynh, Andrew D. Ferguson, Peter S. Horanyi, Stephen J. Mayclin, Henry S. Heine, George L. Drusano, Jason E. Cummings, Richard A. Slayden, Ruben A. Tommasi
Summary: The study presents a rational design strategy for developing new antibiotics to combat infections caused by drug-resistant Gram-negative pathogens. The inhibitors are able to overcome multiple mechanisms of resistance and show potential clinical efficacy against superbugs.
Article
Environmental Sciences
Tianyu Huang, Meng Lai, Zhenwei Lin, Xuezheng Xiang, Haozhe Xu, Ning Pan, Zhaojiang Zuo
Summary: This study analyzed the terpenoid composition in different chemotypes of Cinnamomum camphora and evaluated their effects on the cyanobacteria Microcystis aeruginosa. Eucalyptol and borneol chemotypes showed stronger algaecidal effects, with eucalyptol and borneol being the main components. The mechanism of action involved the increase of reactive oxygen species levels and caspase-3-like activity, leading to apoptosis-like programmed cell death. These findings suggest that eucalyptol and borneol chemotype extracts and their typical monoterpenoids have potential as algaecides for controlling cyanobacteria.
ENVIRONMENTAL RESEARCH
(2024)
Article
Microbiology
Nimrod Cohen, Isana Veksler-Lublinsky
Summary: Pseudogenes, once considered junk DNA, have recently gained significant interest in the scientific community. In this study, we analyzed the genomic data of Pseudomonas aeruginosa strains and identified correlations between pseudogenes and other genomic features. We also discovered clusters of orthologous genes and pseudogenes, and found that related strains share a significant amount of pseudogenes. Additionally, we classified pseudogenes into different types based on their phylogenetic neighborhood. This in-depth study provides important insights for future pseudogene annotation pipelines.
MICROBIOLOGY SPECTRUM
(2023)
Article
Microbiology
Nimrod Cohen, Isana Veksler-Lublinsky
Summary: This study analyzed the genomic data of Pseudomonas aeruginosa strains and found correlations between the number of pseudogenes and other genomic features. It identified clusters of orthologous genes and pseudogenes and examined their phylogenetic relationships. The study provides insights that can improve pseudogene annotation pipelines in the future.
MICROBIOLOGY SPECTRUM
(2023)
Article
Ecology
Alexander M. Cancelli, Frank A. P. C. Gobas
Summary: A mechanistic model was developed to assess the removal efficiency of pollutants in a wetland system, particularly in oil sands process-affected water (OSPW). The model simulated wetland mechanisms of chemical removal and showed that sustained wetland treatment is feasible. It is a helpful tool to evaluate the feasibility of treatment systems and to assess trade-offs in wetland design and operation.
ECOLOGICAL ENGINEERING
(2024)
Article
Ecology
Prakash Singh Thapa, Hiromu Daimaru, Seiji Yanai
Summary: This study assessed the vegetation recovery and erosion condition in a landslide area in central Japan. The results show that the upper slope, where reforestation activities were implemented, has seen significant vegetation recovery and no significant erosion, while the lower slope lacks vegetation and has experienced continued erosion.
ECOLOGICAL ENGINEERING
(2024)
Article
Ecology
Mike Jerauld, Forrest Dierberg, Thomas DeBusk, Scott Jackson, Kevin Grace, John Juston
Summary: The Everglades Stormwater Treatment Areas (STAs) are constructed wetlands built to remove phosphorus (P) from agricultural and urban runoff in support of Everglades restoration. Research shows that the levels of calcium (Ca) and alkalinity (Alk) have an impact on phosphorus removal in these wetlands.
ECOLOGICAL ENGINEERING
(2024)
Article
Ecology
Kalindhi Larios, Stefan Gerber, Rafael Munoz-Carpena, Patrick Inglett, K. Ramesh Reddy, Michael Chimney
Summary: This study modeled the phosphorus biogeochemical dynamics in one of the best performing Everglades treatment wetlands and found that the complexity of the hydrological system significantly affected the simulated water column P concentration. The modeling tool developed in this study can guide future data collection and optimization efforts for treatment wetlands in the Everglades.
ECOLOGICAL ENGINEERING
(2024)
Article
Ecology
Jing Hu, Benjamin Baiser, R. Thomas James, K. Ramesh Reddy
Summary: This study examined the long-term phosphorus retention in Stormwater Treatment Areas (STAs) and identified the factors influencing their performance. The results showed that the operational performance of STAs improved over time. There were notable differences among individual STAs, with the co-precipitation of phosphorus with calcium playing a critical role in one of the STAs. This highlights the complexity of phosphorus removal in STAs and the need for site-specific management strategies.
ECOLOGICAL ENGINEERING
(2024)
Article
Ecology
Odi Villapando, K. R. Reddy, J. King
Summary: The biogeochemical response to different flow conditions within two parallel flow-ways in Everglades Stormwater Treatment Area (STA)-2 was studied. It was found that there was a gradual decrease in the total phosphorus (TP) concentration from inflow to outflow for both emergent aquatic vegetation (EAV) and submerged aquatic vegetation (SAV) dominated systems, with EAV showing a higher reduction rate. Significant increase in TP concentration was observed in the SAV system under no flow condition, possibly due to the production of particulate phosphorus (PP) through various mechanisms.
ECOLOGICAL ENGINEERING
(2024)