Navigating the signaling landscape of Ralstonia solanacearum: a study of bacterial two-component systems.

Ralstonia solanacearum, the bacterium that causes bacterial wilt, is a destructive phytopathogen that can infect over 450 different plant species. Several agriculturally significant crop plants, including eggplant, tomato, pepper, potato, and ginger, are highly susceptible to this plant disease, which has a global impact on crop quality and yield. There is currently no known preventive method that works well for bacterial wilt. Bacteria use two-component systems (TCSs) to sense their environment constantly and react appropriately. This is achieved by an extracellular sensor kinase (SK) capable of sensing a suitable signal and a cytoplasmic response regulator (RR) which gives a downstream response. Moreover, our investigation revealed that R. solanacearum GMI1000 possesses a substantial count of TCSs, specifically comprising 36 RRs and 27 SKs. While TCSs are known targets for various human pathogenic bacteria, such as Salmonella, the role of TCSs in R. solanacearum remains largely unexplored in this context. Notably, numerous inhibitors targeting TCSs have been identified, including GHL (Gyrase, Hsp, and MutL) compounds, Walk inhibitors, and anti-TCS medications like Radicicol. Consequently, the investigation into the involvement of TCSs in virulence and pathogenesis has gained traction; however, further research is imperative to ascertain whether TCSs could potentially supplant conventional anti-wilt therapies. This review delves into the prospective utilization of TCSs as an alternative anti-wilt therapy, focusing on the lethal phytopathogen R. solanacearum.

Unravelling the genomic secrets of bacterial fish pathogens: a roadmap to aquaculture sustainability.

In the field of aquaculture, bacterial pathogens pose significant challenges to fish health and production. Advancements in genomic technologies have revolutionized our understanding of bacterial fish pathogens and their interactions with their host species. This review explores the application of genomic approaches in the identification, classification, and characterization of bacterial fish pathogens. Through an extensive analysis of the literature, we have compiled valuable data on 79 bacterial fish pathogens spanning 13 different phyla, encompassing their whole genome sequences. By leveraging high-throughput sequencing techniques, researchers have gained valuable insights into the genomic makeup of these pathogens, enabling a deeper understanding of their virulence factors and mechanisms of host interaction. Furthermore, genomic approaches have facilitated the discovery of potential vaccine and drug targets, opening up new avenues for the development of effective interventions against fish pathogens. Additionally, the utilization of genomics in fish disease resistance and control in aquaculture has shown promising results, enabling the identification of genetic markers associated with disease resistance traits. This review highlights the significant contributions of genomics to the field of fish pathogen research and underscores its potential for improving disease management strategies and enhancing the sustainability of aquaculture practices.

G-quadruplex motifs are functionally conserved in cis-regulatory regions of pathogenic bacteria: An in-silico evaluation.

The role of G-quadruplexes in the cellular physiology of human pathogenesis is an intriguing area of research. Nonetheless, their functional roles and evolutionary conservation have not been compared comprehensively in pathogenic forms of various bacterial genera and species. In the current in silico study, we addressed the role of G-quadruplex-forming sequences (G4 motifs) in the context of cis-regulation, expression variation, regulatory networks, gene orthology and ontology. Genome-wide screening across seven pathogenic genomes using the G4Hunter tool revealed the significant prevalence of G4 motifs in cis-regulatory regions compared to the intragenic regions. Significant conservation of G4 motifs was observed in the regulatory region of 300 orthologous genes. Further analysis of published ChIP-Seq data (Minch et al., 2015) of 91 DNA-binding proteins of the M. tuberculosis genome revealed significant links between G4 motifs and target sites of transcriptional regulators. Interestingly, the transcription factors entangled with virulence, in specific, CsoR, Rv0081, DevR/DosR, and TetR family are found to have G4 motifs in their target regulatory regions. Overall the current study applies positional-functional relationship computation to delve into the cis-regulation of G-quadruplex structures in the context of gene orthology in pathogenic bacteria.

Ethnozoology of the Karbis of Assam, India: Use of ichthyofauna in traditional health-care practices.

BACKGROUND: Traditional or folk medicine is still prevalent among the Karbis as means of primary health-care. Traditional medicine is not only a source of healing, but the practice is also an important part of their religion and culture. AIM: The aim of the present study is to discuss the use of ichthyofauna in traditional health-care practices among the Karbis and other ethnic tribes of Karbi Anglong district, Assam. SETTING AND DESIGN: Field study was undertaken from March 2011 to June 2012. A total of 75 informants were selected from 27 villages and the selection was based on their recognition as having sound knowledge relating to health-care practices. MATERIALS AND METHODS: Information was collected following both unstructured and structured interview methods, group discussions and personal observation. Fish used in health-care practices were collected with the help of local guides and identified using available literatures. RESULTS: The present study has recorded use of 14 species belonging 7 families in the treatment of 25 disease conditions. Traditional health-care practices of the Karbis include both local and oral applications and rituals to cure diseases. Use of fish to cure mental depression like symptoms locally referred as nihu kachingtung is prevalent until today. Studies among the Dimasa and Thadou tribes also revealed the use of fish in traditional medicine as therapies against different ailments, but do not use fish in rituals. CONCLUSION: Study on fish-based zootherapy could be a viable option for discovery of new compounds with therapeutic potentials. However, the attitude of the present generation towards traditional medicine as being unscientific and acculturation are the main causes of decline of such practice in the Karbis. Destructive fishing practices by poisoning water bodies with synthetic chemicals pose serious threats to aquatic fauna in the hill streams.