A5073410010- Vibrio bacteria research studies
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Aquaculture disease management and microbiota
- Crystallography and molecular interactions
- Salmonella and Campylobacter epidemiology
- Metal complexes synthesis and properties
- Bacterial biofilms and quorum sensing
- Electrocatalysts for Energy Conversion
- Metal-Organic Frameworks: Synthesis and Applications
- Bacteriophages and microbial interactions
- Escherichia coli research studies
- Antibiotic Resistance in Bacteria
- Child Nutrition and Water Access
- COVID-19 epidemiological studies
- Advanced battery technologies research
- Fecal contamination and water quality
- Data-Driven Disease Surveillance
- Yersinia bacterium, plague, ectoparasites research
- Magnetism in coordination complexes
- Synthesis and Characterization of Heterocyclic Compounds
- Cassava research and cyanide
- CO2 Reduction Techniques and Catalysts
- Identification and Quantification in Food
- Parasitic infections in humans and animals
University of Florida
2016-2025
Indian Institute of Technology Delhi
2007-2025
University of Louisiana at Lafayette
2025
Sharda University
2023-2024
University of Engineering and Technology Taxila
2024
Indian Institute of Technology Gandhinagar
2019-2024
University of Engineering and Technology Lahore
2024
University of Kalyani
2023
University of Lahore
2022-2023
Florida College
2014-2023
ABSTRACT The complete genome of Aeromonas hydrophila ATCC 7966 T was sequenced. , a ubiquitous waterborne bacterium, has been placed by the Environmental Protection Agency on Contaminant Candidate List because its potential to cause human disease. 4.7-Mb this emerging pathogen shows physiologically adroit organism with broad metabolic capabilities and considerable virulence potential. A large array genes, including some identified in clinical isolates spp. or Vibrio spp., may confer upon...
The occurrence of outbreaks cholera in Africa 1970 and Latin America 1991, mainly coastal communities, the appearance new serotype Vibrio cholerae O139 India subsequently Bangladesh have stimulated efforts to understand environmental factors influencing growth geographic distribution epidemic serotypes. Because severity recent epidemics, is now being considered by some infectious disease investigators as a "reemerging" disease, prompting work on ecology vibrios. Epidemiological ecological...
Vibrio cholerae O1 in plankton samples collected from ponds and rivers between February 1987 January 1990 Matlab, Bangladesh, was detected by the fluorescent-monoclonal antibody (FA) technique. Samples were at sites which monitored fortnightly (fixed sites) as well that part of a case-control study. FA results compared with those obtained conventional culture methods (CM). A total 876 collected; V. 563 (64.27%) method 3 (0.34%) CM. Of fixed-site samples, 439 (63.62%) positive none 93 case...
How Vibrio cholerae spreads around the world and what determines its seasonal peaks in endemic areas are not known. These features of cholera have been hypothesized to be primarily result environmental factors associated with aquatic habitats that can now identified. Since 1997, fortnightly surveillance 4 widely separated geographic locations Bangladesh has performed identify patients collect data. A total 5670 (53% <5 years age) studied; 14.3% had (10.4% due V. O1 El Tor, 3.8% O139). Both...
ABSTRACT Toxigenic Vibrio cholerae , rarely isolated from the aquatic environment between cholera epidemics, can be detected in what is now understood to a dormant stage, i.e., viable but nonculturable when standard bacteriological methods are used. In research reported here, biofilms have proved source of culturable V. even nonepidemic periods. Biweekly environmental surveillance for was carried out Mathbaria, an area endemicity adjacent Bay Bengal, with focus on O1 and O139 Bengal. A total...
Novel preventatives could help in efforts to limit Vibrio cholerae infection and the spread of cholera. Bacteriophage (phage) treatment has been proposed as an alternative intervention, given rapid replication virulent phages, prey specificity, relative ease finding new phages. Phage tropism is dictated part by presence phage receptors on bacterial surface. While many phages that can kill V. have isolated, whether this pathogen able defend itself neutralizing binding unknown. Here, we show...
Rising populations and industrial expansion necessitate sustainable alternatives to conventional cement-based concrete. Geopolymers, with their impressive mechanical properties, eco-friendliness, potential for waste utilization, offer a promising solution. Yet, concerns like rapid setting low workability limit widespread adoption. This study addresses these challenges by optimizing geopolymer concrete incorporating ground granulated blast furnace slag (GGBS) blended bentonite dolomite...
Abstract Within concrete engineering, the uptake of self-compacting (SCC) represents a notable trend, delivering improved workability and placement efficiency. However, challenges persist, notably in achieving optimal performance while mitigating environmental impacts, particularly cement consumption. simply reducing content mix design can directly compromise structural-concrete requirements. Towards these challenges, global trends emphasize utilization appropriate waste materials blended...
Virulence of Vibrio cholerae depends on secretion cholera toxin (CT), which is encoded within the genome a filamentous phage, CTXφ. Release CT mediated by extracellular protein (eps) type II system. Here, outer membrane component this system, EpsD, was shown to be required for phage as well. Thus, EpsD plays role both in pathogenicity and horizontal transfer key virulence gene. Genomic analysis suggests that additional phages also exploit chromosome-encoded channels.
Vibrio cholerae can switch to a 'rugose' phenotype characterized by an exopolysaccharide (EPS) matrix, wrinkled colony morphology, increased biofilm formation and survival under specific conditions. The vps gene cluster responsible for the biosynthesis of rugose EPS (rEPS) is positively regulated VpsR. We recently identified media (APW#3) promoting production found epidemic strains at higher frequency than non-pathogenic strains, suggesting this are important in cholera epidemiology. In...
The present work shows that the Co3+ coordination to deprotonated pyridine-amide ligands orients noncoordinated or hanging pyridine rings, thus furnishing a cleft in which Zn2+ ions coordinate. building block approach points out strategy incorporate Lewis acidic metal center periphery. This has been used synthesize Co3+-centered−Zn2+-peripheral heterobimetallic complexes. These complexes have thoroughly characterized including structural studies and successfully shown catalyze Beckmann...
Altered El Tor Vibrio cholerae O1, with classical cholera toxin B gene, was isolated from 16 patients severe diarrhea at St. Mark's Hospital, Arbonite, Haiti, <3 weeks after onset of the current epidemic. Variable-number tandem-repeat typing 187 isolates showed minimal diversity, consistent a point source for
In response to antibiotic and/or environmental stress, some species of bacteria shift a "persister" phenotype. Although toxigenic Vibrio cholerae, responsible for the disease cholera, can be found in nutrient-poor aquatic environments endemic areas, underlying mechanism(s) by which culturable cells persist these reservoirs is largely unknown. Here we report that introduction V. cholerae into filter sterilized lake water (FSLW) microcosm promoted what have defined as phenotype (PP) was >700...
An epidemic of cholera infections was documented in Haiti for the first time more than 100 years during October 2010. Cases have continued to occur, raising question whether microorganism has established environmental reservoirs Haiti. We monitored 14 sites near towns Gressier and Leogane April 2012-March 2013. Toxigenic Vibrio cholerae O1 El Tor biotype strains were isolated from 3 (1.7%) 179 water samples; nontoxigenic V. an additional samples. All samples containing also contained non-O1...
The spread of cholera in the midst an epidemic is largely driven by direct transmission from person to person, although it well-recognized that Vibrio cholerae also capable growth and long-term survival aquatic ecosystems. While prior studies have shown reservoirs are important persistence disease on Indian subcontinent, epidemiological view postulating locally evolving environmental V. contributes outbreaks outside Asia remains debated. single-source introduction toxigenic O1 Haiti, one...
The development of a bidirectional catalyst for oxygen reduction and water oxidation is the key to establishing sustainable energy transduction from renewable resources. We report stable homogeneous molecular copper complex, comprising labile diimine-dioxime ligand framework, that enables rapid complete 4e–/4H+ electrocatalysis both (2.1(±0.01) × 105 s–1) (3.2(±0.01) in aqueous solution presumably via situ formation binuclear intermediates. Computational investigations unravel pivotal role...
Gold- and silver-based plasmonic materials have emerged as game changers in the field of solar-driven small-molecule activation because their enhanced broadly tunable absorption cross sections. This review essays cutting-edge research plasmon-mediated while highlighting role nanostructures photosensitizers, leading to advent numerous photocatalytic materials. Here we initiate discussion with a basic overview optical properties, followed by detailed analysis three major categories...
Controlling the selectivity of 4e–/4H+ reduction oxygen over 2e–/2H+ is a key challenge in making efficient catalysts for fuel cell cathodes. A tyrosine residue poised active site cytochrome c oxidase (CcO) has been demonstrated to control hydrogen atom transfer reactions and cleavage O–O bond Fe–O–O–Cu moiety yield water. In couple small-molecule iron complexes supported by porphyrin derivatives, it was shown that presence protonation sites at secondary coordination sphere plays an...
The present work demonstrates the utilization of Co(3+) complex pyridine-amide ligand as building blocks for assembly heterobimetallic complexes. These Co(3+)-centered orient tethered pyridine groups to a preorganized cleft that successively coordinates Cd(2+) and Hg(2+) ions in periphery. Both {Cd(2+)-Co(3+)-Cd(2+)} {Hg(2+)-Co(3+)-Hg(2+)} complexes have been thoroughly characterized, including crystal structures depicting interesting weak interactions solid state. further used catalytic...
Two {Co(3+)-Zn(2+)} heterobimetallic coordination networks have been synthesized utilizing Co(3+) complex as the building blocks. The structural studies reveal 2D sheet-like where containing blocks are connected through Zn(2+) ions. different generate two unique evidenced by crystallographic and other properties. These shown to catalyze Lewis metal ion assisted Strecker reaction in heterogeneous manner.
This work shows the syntheses, structures, and hydrogen-bonding based self-assembly of Co3+ coordination complexes containing appended phenol catechol groups. Placement hydrogen-bond donors (in O–H groups catechol) acceptors C═Oamide groups) in a single molecule results complementary yet unique self-assembly.
Since the identification of first cholera case in 2010, disease has spread epidemic form throughout island nation Haiti; as 2014, about 700,000 cases have been reported, with over 8,000 deaths. While numbers declined, more fundamental question whether causative bacterium, Vibrio cholerae established an environmental reservoir surface waters Haiti remains to be elucidated. In a previous study conducted between April 2012 and March 2013, we reported isolation toxigenic V. O1 from Ouest...