Newly identified c-di-GMP pathway putative EAL domain gene STM0343 regulates stress resistance and virulence in Salmonella enterica serovar Typhimurium by Kaifeng Chen, Lili Li, Nanwei Wang, Zhouping Zhou, Peng Pan, Chenggang Xu, Dage Sun, Jiayi Li, Changzhi Dai, Dai Kuang, Ming Liao, Jianmin Zhang

“…Specifically, it exhibited increases of 95.74% in extracellular protein and 35.96% in exopolysaccharide production by upregulating the expression of relevant genes. As a result, the biofilm formation ability of 269ΔSTM0343 was enhanced by 21.54%, accompanied by a more pronounced red, dry, and rough colony morphology. 269ΔSTM0343 also showed a 19.03% decrease in motility due to the downregulation of flhD expression. …”
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Microbial community structure and functional traits involved in the adaptation of culturable bacteria within the gut of amphipods from the deepest ocean by Yukun Cui, Yu Xiao, Zhuo Wang, Paiyao Ji, Changhao Zhang, Yongqi Li, Jiasong Fang, Xi Yu

“…In addition, the presence of antibacterial compounds and antibiotic resistance genes, as well as the ability to form a biofilm, facilitated the successful colonization of P. pentosaceus XY62 in the gut environment.IMPORTANCEAmphipods are widely distributed in the Hadal trenches, and the study of their gut microbes has garnered considerable scientific interest. …”
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Emerging Resistance and Virulence Patterns in <i>Salmonella enterica</i>: Insights into Silver Nanoparticles as an Antimicrobial Strategy by Irina Gheorghe-Barbu, Ilda Czobor Barbu, Rareș-Ionuț Dragomir, Ioana Cristina Marinaș, Miruna Silvia Stan, Radu Pericleanu, Andreea Ștefania Dumbravă, Liviu-Iulian Rotaru, Simona Paraschiv, Leontina Mirela Bănică, Ionuț Pecete, Dan Oțelea, Violeta Corina Cristea, Mircea Ioan Popa, Marilena Monica Țânțu, Marius Surleac

“…Methods: In 2019, community-acquired <i>Salmonella</i> strains were collected and identified using MALDI-TOF mass spectrometry, antibiotic susceptibility profiles have been determined with the MicroScan system, and soluble virulence factors were evaluated using specific culture media, while biofilm formation was quantified in 96-well plates. …”
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Confocal Microscopy for Detection of Intracellular Bacteria in Urine Samples of patients Suspected with Urinary Tract Infection: A Cross-sectional Observational Study by Bhagyashri Patil-Takbhate, Nilam Memane, Srikanth Tripathy, Nageswari Gandham, Shahzad Mirza

“…Urine samples showing intracellular gram-negative bacteria by Gram staining were further processed for fluorescence confocal microscopy followed by conventional culture and virulence detection by multiplex Polymerase Chain Reaction (PCR). Formation of biofilm ability was assessed by tube method. Quantitative data presented as mean and Standard Deviation (SD) while qualitative variables expressed as frequency (percentage). …”
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Autoinducer-2 enhances the defense of Vibrio furnissii against oxidative stress and DNA damage by modulation of c-di-GMP signaling via a two-component system by Heng Zhang, Wenjin Zhao, Wenguang Yang, Huimin Zhang, Xinyu Qian, Kai Sun, Qiao Yang, Xihui Shen, Lei Zhang

“…In contrast with another well-known AI-2 receptor LuxP that recognizes the borated form of AI-2, AsrK is found to show higher affinity with AI-2 under borate-depleted conditions, and thus boron has a negative effect on AI-2 sensing by AsrK in regulation of the biofilm and motility phenotypes. AI-2 binds to the extracytoplasmic dCache_1 domain of AsrK to inhibit its autokinase activity, thus decreasing the phosphorylation level of its cognate response regulator AsrR and activating the phosphodiesterase activity of AsrR to degrade the cellular second messenger cyclic di-GMP (c-di-GMP). …”
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Technological dental sealants: in vitro evaluation of material properties and antibiofilm potential by Witalo Pereira de Jesus, Luiza de Almeida Queiroz Ferreira, Washington Henrique Themoteo da Silva, Fernanda Vieira Belém, Ana Paula Turrioni, Cláudia Silami de Magalhães, Mila Fernandes Moreira Madeira, Ivana Márcia Alves Diniz, Marco Aurelio Benini Paschoal

“…For the MAS test, a bacterial biofilm of S. mutans was induced for five days in BHI broth + 5% sucrose and measurement of CFU/ml (log 10 from serial dilutions). …”
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