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Alabdallah NM, Kotb E. Antimicrobial Activity of Green Synthesized Silver Nanoparticles Using Waste Leaves of Hyphaene thebaica (Doum Palm). Microorganisms 2023; 11:microorganisms11030807. [PMID: 36985380 PMCID: PMC10054916 DOI: 10.3390/microorganisms11030807] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2023] [Revised: 03/04/2023] [Accepted: 03/06/2023] [Indexed: 03/30/2023] Open
Abstract
Silver nanoparticles (AgNPs) were biosynthesized for the first time from waste leaves extract of local doum palms in Tabuk, Saudi Arabia. The transmission electron microscope (TEM) revealed a spherical shape with a particle size from 18 to 33 nm. The d-spacing is about 2.6 Å, which confirms a face-centered cubic crystalline building. The biosynthesized AgNPs were evaluated as an antimicrobial agent against several pathogenic bacteria, including Escherichia coli ATCC 25922, Staphylococcus aureus ATCC 29213, and Pseudomonas aeruginosa ATCC 27853. The highest action was exerted against S. aureus ATCC 29213 (MIC = 1.5 µg/mL). Interestingly, AgNPs also showed anticandidal activity against the pathogenic yeasts Candida albicans ATCC 14053 (MIC = 24 µg/mL) and Candida tropicalis ATCC 13803 (MIC = 96 µg/mL). Scanning electron microscope (SEM) revealed deep morphological changes in Candida spp. due to the treatment of the AgNPs. Scarce pseudohyphae, perforation, exterior roughness, irregularly shaped cells, and production of protective exopolysaccharide (EPS) were the main features. In conclusion, the process of biosynthesis of AgNPs from the aqueous leaf extract of Hyphaene thebaica is environmentally compatible and induces the biosynthesis of tiny AgNPs that could be a promising candidate in biomedical applications, including antimicrobials against some pathogenic bacteria and yeasts.
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Affiliation(s)
- Nadiyah M Alabdallah
- Basic and Applied Scientific Research Center (BASRC), Imam Abdulrahman Bin Faisal University (IAU), P.O. Box 1982, Dammam 31441, Saudi Arabia
- Department of Biology, College of Science, Imam Abdulrahman Bin Faisal University (IAU), P.O. Box 1982, Dammam 31441, Saudi Arabia
| | - Essam Kotb
- Basic and Applied Scientific Research Center (BASRC), Imam Abdulrahman Bin Faisal University (IAU), P.O. Box 1982, Dammam 31441, Saudi Arabia
- Department of Biology, College of Science, Imam Abdulrahman Bin Faisal University (IAU), P.O. Box 1982, Dammam 31441, Saudi Arabia
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Spectroscopic characterization, DFT modeling and antimicrobial studies of some novel nanoparticles mixed ligand complexes of NS bidentate ligand in presence of 2,2′-bipyridine. J Mol Liq 2023. [DOI: 10.1016/j.molliq.2023.121404] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
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El-Shwiniy WH, El-Desoky SI, Alrabie A, Abd El-Wahaab B. Spectrophotometric determination of Zr(IV), Hg(II) and U(VI) in solution with their analytical applications: Structural characterization and molecular docking of the solid complexes. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 279:121400. [PMID: 35609395 DOI: 10.1016/j.saa.2022.121400] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Revised: 04/11/2022] [Accepted: 05/13/2022] [Indexed: 06/15/2023]
Abstract
Spectrophotometry was used to determine trace amounts of Zirconium(IV), Mercury(II) and Uranium(VI) in environmental, biological, pharmaceutical and industrial samples. The determination depend on the complexation reactions between albendazole reagent and metal ions [Zr(IV), Hg(II) and U(VI)] at 555 nm, 485 nm and 510 nm, respectively. The experimental conditions were explored to reach the optimum conditions for albendazole-metal ions interaction, including detection of a suitable wavelength, medium (pH), reagent concentration, surfactants effect, reaction time and temperature. Under optimum conditions, the complexes displayed apparent molar absorptivities of 0.8350 × 104, 0.6210 × 104 and 0.7012 × 104 L mol-1 cm-1; Sandell's sensitivity of 0.01092, 0.03230 and 0.03394 µg cm-2 and with linearity ranges of 1.0-120.0, 3.0-200.0 and 1.0-150.0 µg mL-1 for the developed methods, respectively. Furthermore, Elemental analysis, thermal analysis (TGA, DTG), IR, 1HNMR, spectroscopies, electrical molar conductivity and magnetic moment measurements were used to determine the structures and characteristics of the complexes. A careful examination of the IR spectra revealed that the ligand interacted with all of the metal ions described as a bidentate via the oxygen of the carbonyl of the ester moiety and the nitrogen atom of the heterocyclic CN group. An octahedral geometry for Zr(IV), Hg(II) and U(VI) complexes has been postulated based on magnetic and electronic spectrum data. The band gap values indicated that these complexes were semi-conductors and belong to the same class of extremely effective solar materials. The albendazole ligand and its complexes have been biologically tested against a variety of bacterial and fungal strains, and molecular docking studies have been conducted to evaluate the optimal binding site and its inhibitory action.
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Affiliation(s)
- Walaa H El-Shwiniy
- Faculty of Science, Chemistry Department, Zagazig University, Zagazig 44519, Egypt; Department of Chemistry, College of Science, University of Bisha, Bisha 61922, Saudi Arabia
| | - Sameh I El-Desoky
- Regional Joint Laboratory, Directorate of Health Affairs, the Arab Republic of Egypt, Zagazig, Egypt
| | - Ali Alrabie
- Chemistry Department, Faculty of Education Albaydha, Albaydha University, Yemen
| | - Badr Abd El-Wahaab
- Faculty of Science, Chemistry Department, Zagazig University, Zagazig 44519, Egypt.
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DPPH and Nitric Oxide Free Radical Scavenging Potential of Phenyl Quinoline Derivatives and Their Transition Metal Complexes. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.134058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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El-Attar MS, Sadeek SA, Abd El-Hamid SM, Elshafie HS. Spectroscopic Analyses and Antimicrobial Activity of Novel Ciprofloxacin and 7-Hydroxy-4-methylcoumarin, the Plant-Based Natural Benzopyrone Derivative. Int J Mol Sci 2022; 23:ijms23148019. [PMID: 35887366 PMCID: PMC9316271 DOI: 10.3390/ijms23148019] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Revised: 07/13/2022] [Accepted: 07/18/2022] [Indexed: 02/04/2023] Open
Abstract
Coumarin is highly distributed in nature, notably in higher plants. The biological features of coumarin include antibacterial, anticancer and antioxidant effects. It is well known that metal ions present in complexes accelerate the drug action and the efficacy of organic therapeutic agents. The main aim of the current study is the synthesis of different complexes of the interaction between ciprofloxacin hydrochloride (CIP) and coumarin derivative 7-hydroxy-4-methylcoumarin (HMC) with Zr(IV). The chelates of CIP with Zr(IV) were prepared and characterized by elemental analysis, melting point, conductance measurements, spectroscopic techniques involving IR, UV-Vis, 1H NMR, and thermal behavior (TG-DTG) in the presence of HMC, dimethylformamide (DMF), pyridine (Py), and triethylamine (Et3N). Results of molar conductivity tests showed that the new synthesized complexes are electrolytes with a 1:1 or 1:2 electrolyte ratio, with the chloride ions functioning as counter ions. According to IR spectra, CIP acts as a neutral bidentate ligand with Zr(IV) through one carboxylato oxygen and the carbonyl group, HMC as a monodentate through the carbonyl group, and DMF through the oxygen atom of the carbonyl group and the N atom of Py and Et3N. The thermal behavior of the complexes was carefully investigated using TG and DTG techniques. TG findings signal that water molecules are found as hydrated and coordinated. The thermal decomposition mechanisms proposed for CIP, HMC, and Zr(IV) complexes are discussed and the activation energies (Ea), Gibbs free energies (∆G*), entropies (∆S*), and enthalpies (∆H*) of thermal decomposition reactions have been calculated using Coats–Redfern (CR) and Horowitz–Metzeger (HM) methods. The studied complexes were tested against some human pathogens and phytopathogens, including three Gram-positive bacteria (Bacillus subtilis, B. cereus, Brevibacterium otitidis) and three Gram-negative bacteria (Escherichiacoli, Pseudomonas aeruginosa and Klebsiella pneumoniae), and compared to the free CIP and HMC parent compounds.
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Affiliation(s)
- Mohamed S. El-Attar
- Department of Chemistry, Faculty of Science, Zagazig University, Zagazig 44519, Egypt; (M.S.E.-A.); (S.A.S.)
| | - Sadeek A. Sadeek
- Department of Chemistry, Faculty of Science, Zagazig University, Zagazig 44519, Egypt; (M.S.E.-A.); (S.A.S.)
| | - Sherif M. Abd El-Hamid
- Department of Basic Science, Higher Future Institute of Engineering and Technology, Mansoura 35511, Egypt;
| | - Hazem S. Elshafie
- School of Agricultural, Forestry, Food and Environmental Sciences, University of Basilicata, 85100 Potenza, Italy
- Correspondence: ; Tel.: +39-0971-205522; Fax: +39-0971-205503
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El‐Attar MS, Ahmed FM, Sadeek SA, Mohammed SF, Zordok WA, El‐Shwiniy WH. Characterization, DFT and Antimicrobial Evaluation of Some New N
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O
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Tetradentate Schiff Base Metal Complexes. Appl Organomet Chem 2022. [DOI: 10.1002/aoc.6826] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- M. S. El‐Attar
- Department of Chemistry, Faculty of Science Zagazig University Zagazig Egypt
| | - F. M. Ahmed
- Regional Joint Laboratory, Directorate of Health Affairs, The Arab Republic of Egypt Zagazig Egypt
| | - S. A. Sadeek
- Department of Chemistry, Faculty of Science Zagazig University Zagazig Egypt
| | - S. F. Mohammed
- Department of Chemistry, Faculty of Science Zagazig University Zagazig Egypt
| | - W. A. Zordok
- Department of Chemistry, Faculty of Science Zagazig University Zagazig Egypt
| | - W. H. El‐Shwiniy
- Department of Chemistry, Faculty of Science Zagazig University Zagazig Egypt
- Department of Chemistry College of Science, University of Bisha Bisha Saudi Arabia
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Salem AE, Mohammed SF, Sadeek SA, Zordok WA, S. El‐Attar M. Synthesis, structural elucidation, molecular modeling and antimicrobial studies of some nanoparticles mixed ligands complexes of cetirizine in presence of 2,2′‐bipyridine. Appl Organomet Chem 2022. [DOI: 10.1002/aoc.6715] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Ahmed E. Salem
- Department of Chemistry, The Egyptian mineral resources authority (EMRA) Cairo Egypt
| | - Soha F. Mohammed
- Department of Chemistry, Faculty of Science Zagazig University Zagazig Egypt
| | - Sadeek A. Sadeek
- Department of Chemistry, Faculty of Science Zagazig University Zagazig Egypt
| | - Wael A. Zordok
- Department of Chemistry, Faculty of Science Zagazig University Zagazig Egypt
| | - Mohamed S. El‐Attar
- Department of Chemistry, Faculty of Science Zagazig University Zagazig Egypt
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Algammal AM, Alfifi KJ, Mabrok M, Alatawy M, Abdel-moneam DA, Alghamdi S, Azab MM, Ibrahim RA, Hetta HF, El-Tarabili RM. Newly Emerging MDR B. cereus in Mugil seheli as the First Report Commonly Harbor nhe, hbl, cytK, and pc-plc Virulence Genes and bla1, bla2, tetA, and ermA Resistance Genes. Infect Drug Resist 2022; 15:2167-2185. [PMID: 35498633 PMCID: PMC9052338 DOI: 10.2147/idr.s365254] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Accepted: 04/15/2022] [Indexed: 01/23/2023] Open
Abstract
Background Bacillus cereus is a common food poisoning pathogen in humans. This study aimed to investigate the prevalence, molecular typing, antibiogram profile, pathogenicity, dissemination of virulence and antibiotic resistance genes associated with natural B. cereus infection among Mugil seheli. Methods Consequently, 120 M. seheli (40 healthy and 80 diseased) were obtained from private fish farms in Port-said Governorate, Egypt. Afterward, samples were processed for clinical, post-mortem, and bacteriological examinations. The recovered isolates were tested for antimicrobial susceptibility, phenotypic assessment of virulence factors, pathogeneicity, and PCR-based detection of virulence and antibiotic resistance genes. Results B. cereus was isolated from 30 (25%) examined fish; the highest prevalence was noticed in the liver (50%). The phylogenetic and sequence analyses of the gyrB gene revealed that the tested B. cereus isolate displayed a high genetic similarity with other B. cereus strains from different origins. All the recovered B. cereus isolates (n =60, 100%) exhibited β-hemolytic and lecithinase activities, while 90% (54/60) of the tested isolates were biofilm producers. Using PCR, the tested B. cereus isolates harbor nhe, hbl, cytK, pc-plc, and ces virulence genes with prevalence rates of 91.6%, 86.6%, 83.4%, 50%, and 33.4%, respectively. Moreover, 40% (24/60) of the tested B. cereus isolates were multidrug-resistant (MDR) to six antimicrobial classes and carried the bla1, bla2, tetA, and ermA genes. The experimentally infected fish with B. cereus showed variable mortality in direct proportion to the inoculated doses. Conclusion As far as we know, this is the first report that emphasized the existence of MDR B. cereus in M. seheli that reflects a threat to the public health and the aquaculture sector. Newly emerging MDR B. cereus in M. seheli commonly carried virulence genes nhe, hbl, cytK, and pc-plc, as well as resistance genes bla1, bla2, tetA, and ermA.
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Affiliation(s)
- Abdelazeem M Algammal
- Department of Bacteriology, Immunology, and Mycology, Faculty of Veterinary Medicine, Suez Canal University, Ismailia, 41522, Egypt
| | - Khyreyah J Alfifi
- Biology Department, Faculty of Science, Tabuk University, Tabuk, 71421, Saudi Arabia
| | - Mahmoud Mabrok
- Department of Fish Diseases and Management, Faculty of Veterinary Medicine, Suez Canal University, Ismailia, 41522, Egypt
| | - Marfat Alatawy
- Biology Department, Faculty of Science, Tabuk University, Tabuk, 71421, Saudi Arabia
| | - Dalia A Abdel-moneam
- Department of Aquatic Animal Medicine and Management, Faculty of Veterinary Medicine, Cairo University, Cairo, 12613, Egypt
| | - Saad Alghamdi
- Laboratory Medicine Department, Faculty of Applied Medical Sciences, Umm Al-Qura University, Makkah, 21955, Saudi Arabia
| | - Marwa M Azab
- Department of Microbiology and Immunology, Faculty of Pharmacy, Suez Canal University, Ismailia, 41522, Egypt
| | - Reham A Ibrahim
- Marine Environmental Division- National Institute of Oceanography and Fisheries (NIOF), Suez, 43511, Egypt
| | - Helal F Hetta
- Department of Medical Microbiology and Immunology, Faculty of Medicine, Assiut University, Assiut, 71515, Egypt
| | - Reham M El-Tarabili
- Department of Bacteriology, Immunology, and Mycology, Faculty of Veterinary Medicine, Suez Canal University, Ismailia, 41522, Egypt
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9
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Synthesis, spectrophotometric, spectroscopic, microbial studies and analytical applications of Cu(II) and Zn(II) complexes of chalcone ligand. CHEMICAL PAPERS 2022. [DOI: 10.1007/s11696-021-01916-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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10
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Al Baroot A, Alheshibri M, Drmosh Q, Akhtar S, Kotb E, Elsayed KA. A novel approach for fabrication ZnO/CuO nanocomposite via laser ablation in liquid and its antibacterial activity. ARAB J CHEM 2022. [DOI: 10.1016/j.arabjc.2021.103606] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
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El‐Attar MS, Elshafie HS, Sadeek SA, El‐Farargy AF, El‐Desoky SI, El‐Shwiniy WH, Camele I. Biochemical Characterization and Antimicrobial Activity against Some Human or Phyto‐Pathogens of New Diazonium Heterocyclic Metal Complexes. Chem Biodivers 2022; 19:e202100785. [DOI: 10.1002/cbdv.202100785] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Accepted: 12/06/2021] [Indexed: 01/29/2023]
Affiliation(s)
- Mohamed S. El‐Attar
- Department of Chemistry Faculty of Science Zagazig University Zagazig 44519 Egypt
| | - Hazem S. Elshafie
- School of Agricultural Forestry Food and Environmental Sciences University of Basilicata Viale dell'Ateneo Lucano 10 Potenza 85100 Italy
| | - Sadeek A. Sadeek
- Department of Chemistry Faculty of Science Zagazig University Zagazig 44519 Egypt
| | - Ahmed F. El‐Farargy
- Department of Chemistry Faculty of Science Zagazig University Zagazig 44519 Egypt
| | - Sameh I. El‐Desoky
- Regional Joint Laboratory Directorate of Health Affairs Zagazig 44515 Egypt
| | - Walaa H. El‐Shwiniy
- Department of Chemistry College of Science University of Bisha Bisha 61922 Saudi Arabia
| | - Ippolito Camele
- School of Agricultural Forestry Food and Environmental Sciences University of Basilicata Viale dell'Ateneo Lucano 10 Potenza 85100 Italy
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Glasset B, Sperry M, Dervyn R, Herbin S, Brisabois A, Ramarao N. The cytotoxic potential of Bacillus cereus strains of various origins. Food Microbiol 2021; 98:103759. [PMID: 33875199 DOI: 10.1016/j.fm.2021.103759] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Revised: 01/10/2021] [Accepted: 01/29/2021] [Indexed: 12/21/2022]
Abstract
B. cereus is a human pathogen associated with food poisoning leading to gastrointestinal disorders, as well as local and severe systemic infections. The pathogenic spectrum of B. cereus ranges from strains used as probiotics in humans to lethal highly toxic strains. In this study, we gathered a collection of 100 strains representative of the pathological diversity of B. cereus in humans, and characterized these strains for their cytotoxic potential towards human cells. We analyzed the correlation between cytotoxicity to epithelial and macrophage cells and the combination of 10 genes suspected to play a role during B. cereus virulence. We highlight genetic differences among isolates and studied correlations between genetic signature, cytotoxicity and strain pathological status. We hope that our findings will improve our understanding of the pathogenicity of B. cereus, thereby making it possible to improve both clinical diagnosis and food safety.
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Affiliation(s)
- Benjamin Glasset
- Micalis Institute, INRAE, AgroParisTech, Université Paris-Saclay, 78350, Jouy-en-Josas, France; Université Paris-Est, Anses, Laboratory for Food Safety, 94700, Maisons-Alfort, France
| | - Mylène Sperry
- Micalis Institute, INRAE, AgroParisTech, Université Paris-Saclay, 78350, Jouy-en-Josas, France
| | - Rozenn Dervyn
- Micalis Institute, INRAE, AgroParisTech, Université Paris-Saclay, 78350, Jouy-en-Josas, France
| | - Sabine Herbin
- Université Paris-Est, Anses, Laboratory for Food Safety, 94700, Maisons-Alfort, France
| | - Anne Brisabois
- Université Paris-Est, Anses, Laboratory for Food Safety, 94700, Maisons-Alfort, France
| | - Nalini Ramarao
- Micalis Institute, INRAE, AgroParisTech, Université Paris-Saclay, 78350, Jouy-en-Josas, France.
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Bacillus cereus Induces Severe Infections in Preterm Neonates: Implication at the Hospital and Human Milk Bank Level. Toxins (Basel) 2021; 13:toxins13020123. [PMID: 33562185 PMCID: PMC7915446 DOI: 10.3390/toxins13020123] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Revised: 01/18/2021] [Accepted: 02/02/2021] [Indexed: 12/15/2022] Open
Abstract
Human breast milk (HBM) is a source of essential nutrients for infants and is particularly recommended for preterm neonates when their own mother’s milk is not available. It provides protection against infections and decreases necrotizing enterocolitis and cardiovascular diseases. Nevertheless, HBM spoilage can occur due to contamination by pathogens, and the risk of a shortage of HBM is very often present. B. cereus is the most frequent ubiquitous bacteria responsible for HBM being discarded. It can contaminate HBM at all stages, from its collect point to the storage and delivery. B. cereus can induce severe infection in newborns with very low birth weight, with sometimes fatal outcomes. Although the source of contamination is rarely identified, in some cases, HBM was suspected as a potential source. Even if the risk is low, as infection due to B. cereus in preterm infants should not be overlooked, human milk banks follow strict procedures to avoid contamination, to accurately identify remaining bacteria following pasteurization and to discard non-compliant milk samples. In this review, we present a literature overview of B. cereus infections reported in neonates and the suspected sources of contamination. We highlight the procedures followed by the human milk banks from the collection of the milk to its microbiological characterization in Europe. We also present improved detection and decontamination methods that might help to decrease the risk and to preserve the public’s confidence in this vital biological product for infants whose mothers cannot breastfeed.
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El‐Shwiniy WH, Ibrahim AG, Sadeek SA, Zordok WA. Synthesis, structural elucidation, molecular modeling and antimicrobial studies of 6‐(2‐hydroxyphenylimine)‐2‐thioxotetrahydropyrimidin‐4(1H)‐one (L) Schiff base metal complexes. Appl Organomet Chem 2021. [DOI: 10.1002/aoc.6174] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Walaa H. El‐Shwiniy
- Department of Chemistry, Faculty of Science Zagazig University Zagazig Egypt
- Department of Chemistry, College of Science University of Bisha Bisha Saudi Arabia
| | - Asmaa G. Ibrahim
- Department of Chemistry, Faculty of Science Zagazig University Zagazig Egypt
| | - Sadeek A. Sadeek
- Department of Chemistry, Faculty of Science Zagazig University Zagazig Egypt
| | - Wael A. Zordok
- Department of Chemistry, Faculty of Science Zagazig University Zagazig Egypt
- Department of Chemistry, University College of Quanfudha Umm Al‐Qura University Al‐Qunfudhah Saudi Arabia
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Traceability of potential enterotoxigenic Bacillus cereus in bee-pollen samples from Argentina throughout the production process. Int J Food Microbiol 2020; 334:108816. [PMID: 32835996 DOI: 10.1016/j.ijfoodmicro.2020.108816] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Revised: 06/23/2020] [Accepted: 08/02/2020] [Indexed: 11/21/2022]
Abstract
Bee-pollen is a functional food sold for human and animal consumption but also is a favorable microhabitat for many spore-forming bacteria. Among them, Bacillus cereus can produce several toxins and other virulence factors, causing an emetic or diarrheal syndrome after ingestion. The study involved 36 bee-pollen samples obtained from different sampling points throughout the production process (collecting, freezing, drying, and cleaning) in Argentina. Fifty isolates of B. cereus yielded 24 different fingerprint patterns with BOX and ERIC primers. Only three fingerprint patterns were maintained throughout the production process. In contrast, others were lost or incorporated during the different steps, suggesting that cross-contamination occurred as shown by differences in fingerprint patterns after freezing, drying, and cleaning steps compared to the initial collection step. Genes encoding for cereulide (ces), cytotoxin K (cytK), sphingomyelinase (sph), the components of hemolysin BL (hblA, hblB, hblC, hblD) and non-hemolytic complex (nheAB) were studied. All the isolates displayed one or more enterotoxin genes. The most frequent virulence genes detected belong to the HBL complex, being the most abundant hblA (98%), followed by hblD (64%), hblB (54%), and hblC (32%), respectively. Ten strains (20%), present at all sampling points, carried all the subunits of the HBL complex. The non-hemolytic enterotoxic complex (nheAB) was found in 48 strains (96%), while seven strains (14%) present at all sampling points showed the amplification product for sphingomyelinase (sph). One cereulide-producer was isolated at the cleaning step; this strain contained all the components for the hemolytic enterotoxin complex HBL, the NHE complex, and cytotoxin K related to the foodborne diarrhoeal syndrome. In total, 11 different virulence patterns were observed, and also a correlation between rep-fingerprint and virulence patterns. The results suggest that bee-pollen can be contaminated at any point in the production process with potential enterotoxic B. cereus strains, emphasizing the importance of hygienic processing.
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Bacillus cereus: Epidemiology, Virulence Factors, and Host-Pathogen Interactions. Trends Microbiol 2020; 29:458-471. [PMID: 33004259 DOI: 10.1016/j.tim.2020.09.003] [Citation(s) in RCA: 56] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2020] [Revised: 09/03/2020] [Accepted: 09/04/2020] [Indexed: 12/30/2022]
Abstract
The toxin-producing bacterium Bacillus cereus is an important and neglected human pathogen and a common cause of food poisoning. Several toxins have been implicated in disease, including the pore-forming toxins hemolysin BL (HBL) and nonhemolytic enterotoxin (NHE). Recent work revealed that HBL binds to the mammalian surface receptors LITAF and CDIP1 and that both HBL and NHE induce potassium efflux and activate the NLRP3 inflammasome, leading to pyroptosis. These mammalian receptors, in part, contribute to inflammation and pathology. Other putative virulence factors of B. cereus include cytotoxin K, cereulide, metalloproteases, sphingomyelinase, and phospholipases. In this review, we highlight the latest progress in our understanding of B. cereus biology, epidemiology, and pathogenesis, and discuss potential new directions for research in this field.
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El‐Shwiniy WH, Gamil MA, Sadeek SA, Zordok WA, El‐farargy AF. Ligational, DFT modeling and biological properties of some new metal complexes with 3‐(bromoacetyl)coumarin and 1,10‐phenanthroline. Appl Organomet Chem 2020. [DOI: 10.1002/aoc.5696] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Walaa H. El‐Shwiniy
- Department of Chemistry Faculty of Science, Zagazig University Zagazig Egypt
- Department of Chemistry, College of Science University of Bisha Bisha Kingdom of Saudi Arabia
| | - Manar A. Gamil
- Department of Chemistry Faculty of Science, Zagazig University Zagazig Egypt
| | - Sadeek A. Sadeek
- Department of Chemistry Faculty of Science, Zagazig University Zagazig Egypt
| | - Wael A. Zordok
- Department of Chemistry Faculty of Science, Zagazig University Zagazig Egypt
- Departmentof chemistry University college of Quanfudha, Umm Al‐Qura University KSA Saudi Arabia
| | - Ahmed F. El‐farargy
- Department of Chemistry Faculty of Science, Zagazig University Zagazig Egypt
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Gamil MA, Sadeek SA, Zordok WA, El-Shwiniy WH. Spectroscopic, DFT modeling and biological study of some new mixed ligand metal complexes derived from gatifloxacin and pregabalin. J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2020.127941] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Ramarao N, Tran SL, Marin M, Vidic J. Advanced Methods for Detection of Bacillus cereus and Its Pathogenic Factors. SENSORS (BASEL, SWITZERLAND) 2020; 20:E2667. [PMID: 32392794 PMCID: PMC7273213 DOI: 10.3390/s20092667] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Revised: 05/02/2020] [Accepted: 05/05/2020] [Indexed: 12/21/2022]
Abstract
Bacillus cereus is an opportunistic foodborne pathogen causing food intoxication and infectious diseases. Different toxins and pathogenic factors are responsible for diarrheal syndrome, like nonhemolytic enterotoxin Nhe, hemolytic enterotoxin Hbl, enterotoxin FM and cytotoxin K, while emetic syndrome is caused by the depsipeptide cereulide toxin. The traditional method of B. cereus detection is based on the bacterial culturing onto selective agars and cells enumeration. In addition, molecular and chemical methods are proposed for toxin gene profiling, toxin quantification and strain screening for defined virulence factors. Finally, some advanced biosensors such as phage-based, cell-based, immunosensors and DNA biosensors have been elaborated to enable affordable, sensitive, user-friendly and rapid detection of specific B. cereus strains. This review intends to both illustrate the state of the B. cereus diagnostic field and to highlight additional research that is still at the development level.
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Affiliation(s)
- Nalini Ramarao
- INRAE, AgroParisTech, Micalis Institute, Université Paris-Saclay, 78350 Jouy-en-Josas, France; (S.-L.T.); (M.M.)
| | | | | | - Jasmina Vidic
- INRAE, AgroParisTech, Micalis Institute, Université Paris-Saclay, 78350 Jouy-en-Josas, France; (S.-L.T.); (M.M.)
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Landsberg JH, Hendrickson J, Tabuchi M, Kiryu Y, Williams BJ, Tomlinson MC. A large-scale sustained fish kill in the St. Johns River, Florida: A complex consequence of cyanobacteria blooms. HARMFUL ALGAE 2020; 92:101771. [PMID: 32113602 DOI: 10.1016/j.hal.2020.101771] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Revised: 12/16/2019] [Accepted: 02/01/2020] [Indexed: 06/10/2023]
Abstract
In the summer of 2010, a sustained multispecies fish kill, affecting primarily adult red drum (Sciaenops ocellatus) and Atlantic stingray (Dasyatis sabina), along with various baitfish such as menhaden (Brevoortia spp.) and shad (Dorosoma spp.), was documented for six weeks along 50 km of the Lower St. Johns River (LSJR), Florida. An Aphanizomenon flos-aquae bloom was present in the freshwater reaches before the fish kill. The kill was triggered by a significant reverse-flow event and sudden influx of high-salinity water in late May that contributed to the collapse of the bloom upstream and brought euryhaline fish downstream into the vicinity of the senescing bloom or its by-products. The decomposing bloom led to a sequence of events, including the release of small amounts of cyanotoxins, bacterial lysis of cyanobacterial cells, high organic loading, and changes in the diversity and dominance of the plankton community to include Microcystis spp., Leptolyngbya sp., Pseudanabaena spp., Planktolyngbya spp., and low concentrations of Heterosigma akashiwo. Dissolved oxygen levels were within normal ranges in the reach of the fish kill, although elevated ammonia concentrations and high pH were detected farther upstream. These conditions resulted in complex pathological changes in fish that were not consistent with acute cyanotoxin exposure or with poor water quality but were attributable to chronic lethal hemolysis. Potential sources of hemolytic activity included H. akashiwo, Microcystis spp., and Bacillus cereus, a hemolytic bacterium. The continued presence of A. flos-aquae in the LSJR could have significant environmental repercussions and ideally the causal factors contributing to bloom growth and maintenance should be fully understood and managed.
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Affiliation(s)
- Jan H Landsberg
- Fish and Wildlife Research Institute, Florida Fish and Wildlife Conservation Commission, 100 Eighth Avenue Southeast, St. Petersburg, FL, 33701, USA.
| | - John Hendrickson
- St. Johns River Water Management District, P.O. Box 1429, Palatka, FL, 32178, USA
| | - Maki Tabuchi
- Fish and Wildlife Research Institute, Florida Fish and Wildlife Conservation Commission, 100 Eighth Avenue Southeast, St. Petersburg, FL, 33701, USA
| | - Yasunari Kiryu
- Fish and Wildlife Research Institute, Florida Fish and Wildlife Conservation Commission, 100 Eighth Avenue Southeast, St. Petersburg, FL, 33701, USA
| | - B James Williams
- Fish and Wildlife Research Institute, Florida Fish and Wildlife Conservation Commission, 100 Eighth Avenue Southeast, St. Petersburg, FL, 33701, USA
| | - Michelle C Tomlinson
- Center for Coastal Monitoring and Assessment, National Ocean Service, National Oceanic and Atmospheric Administration, 1305 East-West Highway, Silver Spring, MD, 20910, USA
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Sadeek S, Mohamed A, El‐Sayed H, El‐Attar M. Spectroscopic characterization, thermogravimetric and antimicrobial studies of some new metal complexes derived from4‐(4‐Isopropyl phenyl)‐2‐oxo‐6‐phenyl 1,2‐dihyropyridine‐3‐carbonitrile (L). Appl Organomet Chem 2019. [DOI: 10.1002/aoc.5334] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- S.A. Sadeek
- Department of Chemistry, Faculty of ScienceZagazig University Zagazig Egypt
| | - A.A. Mohamed
- Department of Basic ScienceHigher Institute of Engineering and Technology Zagazig Egypt
| | - H.A. El‐Sayed
- Department of Chemistry, Faculty of ScienceZagazig University Zagazig Egypt
| | - M.S. El‐Attar
- Department of Chemistry, Faculty of ScienceZagazig University Zagazig Egypt
- Department of Chemistry, Faculty of ScienceJazan University Jazan Saudi Arabia
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Ahmed FM, Sadeek SA, El-Shwiniy WH. Synthesis, Spectroscopic Studies, and Biological Activity of Some New N2O2 Tetradentate Schiff Base Metal Complexes. RUSS J GEN CHEM+ 2019. [DOI: 10.1134/s1070363219090238] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Pyrimidines as block units in heterocycles: novel synthesis of pyrimidines and condensed pyrimidine derivatives. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2019. [DOI: 10.1007/s13738-019-01712-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Sadeek SA, Abd El‐Hamid SM, Mohamed AA, Zordok WA, El‐Sayed HA. Spectroscopic characterization, thermogravimetry, density functional theory and biological studies of some mixed‐ligand complexes of meloxicam and 2,2′‐bipyridine with some transition metals. Appl Organomet Chem 2019. [DOI: 10.1002/aoc.4889] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Sadeek Atia Sadeek
- Department of Chemistry, Faculty of ScienceZagazig University Zagazig Egypt
| | | | - Amira A. Mohamed
- Department of Basic ScienceZagazig Higher Institute of Engineering and Technology Zagazig Egypt
| | - Wael A. Zordok
- Department of Chemistry, Faculty of ScienceZagazig University Zagazig Egypt
- Department of ChemistryUniversity College of Quanfudha, Umm Al‐Qura University Mecca Kingdom of Saudi Arabia
| | - Hassan A. El‐Sayed
- Department of Chemistry, Faculty of ScienceZagazig University Zagazig Egypt
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Sadeek S, Abd El-Hamid S, Zordok W. Spectroscopic, DFT and antimicrobial activity of Zn(II), Zr(IV), Ce(IV) and U(VI) complexes of N,N- chelated 4,6-bis (4-chlorophenyl)-2-amino-1,2-dihydropyridine-3-carbinitrile. Appl Organomet Chem 2018. [DOI: 10.1002/aoc.4457] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- S.A. Sadeek
- Department of Chemistry, Faculty of Science; Zagazig University; Zagazig Egypt
| | - S.M. Abd El-Hamid
- Department of Chemistry, Faculty of Science; Zagazig University; Zagazig Egypt
| | - W.A. Zordok
- Department of Chemistry, Faculty of Science; Zagazig University; Zagazig Egypt
- Department of Chemistry; University College of Quanfudha, Umm Al-Qura University; KSA
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Synthesis, spectroscopic, structural characterization, thermal analysis, kinetics, biological evaluation of non-steroidal anti-inflammatory drug diclofenac zirconium (IV) solvates (L) (L = H 2 O, DMF, Py and Et 3 N). J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2018.04.048] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Glasset B, Herbin S, Granier SA, Cavalié L, Lafeuille E, Guérin C, Ruimy R, Casagrande-Magne F, Levast M, Chautemps N, Decousser JW, Belotti L, Pelloux I, Robert J, Brisabois A, Ramarao N. Bacillus cereus, a serious cause of nosocomial infections: Epidemiologic and genetic survey. PLoS One 2018; 13:e0194346. [PMID: 29791442 PMCID: PMC5966241 DOI: 10.1371/journal.pone.0194346] [Citation(s) in RCA: 69] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2017] [Accepted: 03/01/2018] [Indexed: 11/19/2022] Open
Abstract
Bacillus cereus is the 2nd most frequent bacterial agent responsible for food-borne outbreaks in France and the 3rd in Europe. In addition, local and systemic infections have been reported, mainly describing individual cases or single hospital setting. The real incidence of such infection is unknown and information on genetic and phenotypic characteristics of the incriminated strains is generally scarce. We performed an extensive study of B. cereus strains isolated from patients and hospital environments from nine hospitals during a 5-year study, giving an overview of the consequences, sources and pathogenic patterns of B. cereus clinical infections. We demonstrated the occurrence of several hospital-cross-contaminations. Identical B. cereus strains were recovered from different patients and hospital environments for up to 2 years. We also clearly revealed the occurrence of inter hospital contaminations by the same strain. These cases represent the first documented events of nosocomial epidemy by B. cereus responsible for intra and inter hospitals contaminations. Indeed, contamination of different patients with the same strain of B. cereus was so far never shown. In addition, we propose a scheme for the characterization of B. cereus based on biochemical properties and genetic identification and highlight that main genetic signatures may carry a high pathogenic potential. Moreover, the characterization of antibiotic resistance shows an acquired resistance phenotype for rifampicin. This may provide indication to adjust the antibiotic treatment and care of patients.
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Affiliation(s)
- Benjamin Glasset
- Micalis Institute, INRA, AgroParisTech, Université Paris-Saclay, Jouy-en-Josas, France
- Université Paris-Est, Anses, Laboratory for Food Safety, Maisons-Alfort, France
| | - Sabine Herbin
- Université Paris-Est, Anses, Laboratory for Food Safety, Maisons-Alfort, France
| | - Sophie A. Granier
- Université Paris-Est, Anses, Laboratory for Food Safety, Maisons-Alfort, France
| | - Laurent Cavalié
- CHU Toulouse, Service de Bactériologie-Hygiène, IRSD, Université de Toulouse, INSERM, INRA, ENVT, UPS, Toulouse, France
| | - Emilie Lafeuille
- Sorbonne Universités, UPMC Univ Paris 06, Inserm, U1135, Centre d’Immunologie et des Maladies Infectieuses (CIMI-Paris), Paris, France
- Laboratoire de Bactériologie-Hygiène, Hôpitaux Universitaires Pitié-Salpêtrière-Charles Foix, APHP, Paris, France
| | - Cyprien Guérin
- MaiAGE, INRA, AgroParisTech, Université Paris-Saclay, Jouy-en-Josas, France
| | - Raymond Ruimy
- CHU Nice, Laboratoire de bactériologie, Nice, France
| | | | - Marion Levast
- Hôpital de Chambéry, Laboratoire de Biologie Médicale, Chambéry, France
| | | | - Jean-Winoc Decousser
- Hôpitaux Universitaires Paris-Sud Antoine Béclère, Laboratoire Hygiène, Clamart, France
| | - Laure Belotti
- CHU Strasbourg, Laboratoire d’hygiène hospitalière, Strasbourg, France
| | | | - Jerôme Robert
- Sorbonne Universités, UPMC Univ Paris 06, Inserm, U1135, Centre d’Immunologie et des Maladies Infectieuses (CIMI-Paris), Paris, France
- Laboratoire de Bactériologie-Hygiène, Hôpitaux Universitaires Pitié-Salpêtrière-Charles Foix, APHP, Paris, France
| | - Anne Brisabois
- Université Paris-Est, Anses, Laboratory for Food Safety, Maisons-Alfort, France
| | - Nalini Ramarao
- Micalis Institute, INRA, AgroParisTech, Université Paris-Saclay, Jouy-en-Josas, France
- * E-mail:
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Zordok W, Sadeek S. Synthesis, spectroscopic characterization, biological studies and DFT calculations on some transition metal complexes of NO donor ligand. J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2018.01.030] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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29
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Synthesis, characterization, DFT modeling and biological studies of new Co(II), Ni(II) and Cu(II) 4,6-bis(4-chlorophenyl)-2-amino-1,2-dihydropyridine-3-carbinitrile complexes. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2017. [DOI: 10.1007/s13738-017-1188-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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30
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Glasset B, Herbin S, Guillier L, Cadel-Six S, Vignaud ML, Grout J, Pairaud S, Michel V, Hennekinne JA, Ramarao N, Brisabois A. Bacillus cereus-induced food-borne outbreaks in France, 2007 to 2014: epidemiology and genetic characterisation. ACTA ACUST UNITED AC 2017; 21:30413. [PMID: 27934583 PMCID: PMC5388111 DOI: 10.2807/1560-7917.es.2016.21.48.30413] [Citation(s) in RCA: 85] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Accepted: 07/16/2016] [Indexed: 11/20/2022]
Abstract
The aim of this study was to identify and characterise Bacillus cereus from a unique national collection of 564 strains associated with 140 strong-evidence food-borne outbreaks (FBOs) occurring in France during 2007 to 2014. Starchy food and vegetables were the most frequent food vehicles identified; 747 of 911 human cases occurred in institutional catering contexts. Incubation period was significantly shorter for emetic strains compared with diarrhoeal strains A sub-panel of 149 strains strictly associated to 74 FBOs and selected on Coliphage M13-PCR pattern, was studied for detection of the genes encoding cereulide, diarrhoeic toxins (Nhe, Hbl, CytK1 and CytK2) and haemolysin (HlyII), as well as panC phylogenetic classification. This clustered the strains into 12 genetic signatures (GSs) highlighting the virulence potential of each strain. GS1 (nhe genes only) and GS2 (nhe, hbl and cytK2), were the most prevalent GS and may have a large impact on human health as they were present in 28% and 31% of FBOs, respectively. Our study provides a convenient molecular scheme for characterisation of B. cereus strains responsible for FBOs in order to improve the monitoring and investigation of B. cereus-induced FBOs, assess emerging clusters and diversity of strains.
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Affiliation(s)
- Benjamin Glasset
- Université Paris-Est, ANSES, Laboratory for Food Safety, Maisons-Alfort Cedex, France.,Micalis Institute, INRA, AgroParisTech, Université Paris-Saclay, Jouy-en-Josas, France
| | - Sabine Herbin
- Université Paris-Est, ANSES, Laboratory for Food Safety, Maisons-Alfort Cedex, France.,These authors contributed equally to this work
| | - Laurent Guillier
- Université Paris-Est, ANSES, Laboratory for Food Safety, Maisons-Alfort Cedex, France
| | - Sabrina Cadel-Six
- Université Paris-Est, ANSES, Laboratory for Food Safety, Maisons-Alfort Cedex, France
| | - Marie-Léone Vignaud
- Université Paris-Est, ANSES, Laboratory for Food Safety, Maisons-Alfort Cedex, France
| | - Joel Grout
- Université Paris-Est, ANSES, Laboratory for Food Safety, Maisons-Alfort Cedex, France
| | - Sylvie Pairaud
- Université Paris-Est, ANSES, Laboratory for Food Safety, Maisons-Alfort Cedex, France
| | | | | | - Nalini Ramarao
- Micalis Institute, INRA, AgroParisTech, Université Paris-Saclay, Jouy-en-Josas, France.,These authors contributed equally to this work
| | - Anne Brisabois
- Université Paris-Est, ANSES, Laboratory for Food Safety, Maisons-Alfort Cedex, France.,These authors contributed equally to this work
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31
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Preparation, structural characterization and biological studies of some new levofloxacin metal complexes. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2017. [DOI: 10.1007/s13738-017-1112-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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32
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Sadeek S, El-Hamid SA. Preparation, characterization and cytotoxicity studies of some transition metal complexes with ofloxacin and 1,10-phenanthroline mixed ligand. J Mol Struct 2016. [DOI: 10.1016/j.molstruc.2016.05.101] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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33
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Synthesis, thermal analyses, characterization and biological evaluation of new enrofloxacin vanadium(V) solvates(L) (L = An, DMF, Py, Et3N and o-Tol). J Mol Struct 2016. [DOI: 10.1016/j.molstruc.2016.05.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Seghal Kiran G, Priyadharshini S, Dobson ADW, Gnanamani E, Selvin J. Degradation intermediates of polyhydroxy butyrate inhibits phenotypic expression of virulence factors and biofilm formation in luminescent Vibrio sp. PUGSK8. NPJ Biofilms Microbiomes 2016; 2:16002. [PMID: 28721241 PMCID: PMC5515267 DOI: 10.1038/npjbiofilms.2016.2] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2015] [Revised: 01/28/2016] [Accepted: 03/08/2016] [Indexed: 11/21/2022] Open
Abstract
Luminescent vibrios are ubiquitous in the marine environment and are the causative agents of vibriosis and mass mortality in many aquatic animals. In aquatic environments, treatments cannot be limited to the diseased population alone, therefore treatment of the entire aquatic system is the only possible approach. Thus, the use of antibiotics to treat part of the infected animals requires a dose based on the entire biomass, which results in the treatment of uninfected animals as well as non-target normal microbial flora. A treatment method based on anti-virulence or quorum quenching has recently been proposed as an effective treatment strategy for aquatic animals. Polyhydroxy butyrates (PHB) are bacterial storage molecules, which accumulate in cells under nutritional stress. The degradation of PHB releases short-chain β-hydroxy butyric acid, which may act as anti-infective molecule. To date, there is very limited information on the potential anti-infective and anti-virulence mechanisms involving PHB. In this study, we aim to examine the effect of PHB on inhibition of the virulence cascade of Vibrio such as biofilm formation, luminescence, motility behaviour, haemolysin and quorum sensing. A luminescent Vibrio PUGSK8, tentatively identified as Vibrio campbellii PUGSK8 was tested in vitro for production of extracellular virulence factors and then established as a potential shrimp pathogen based on in vivo challenge experiments. The ability of Vibrio PUGSK8 to form biofilms and the effect of PHB on biofilm formation was tested in a 96-well microtitre-plate assay system. The motility behaviour of Vibrio PUGSK8 was evaluated using twitching, swimming and swarming plate assays. Reporter strains such as Chromobacterium violaceum CV026 and Agrobacterium tumefaciens were used to detect quorum-sensing molecules. Gas chromatography-mass spectrometry spectral analysis was performed to elucidate the fragmentation pattern and structure of N-hexanoyl homoserine lactone. PHB depolymerase activity in Vibrio PUGSK8 was quantified as the amount of the enzyme solution to hydrolyse 1 μg of PHB per min. An in vivo challenge experiment was performed using a gnotobiotic Artemia assay. Of the 27 isolates tested, the Vibrio PUGSK8 strain was selected for target-specific assays based on the high intensity of luminescence and production of virulence factors. The virulence cascade detected in Vibrio PUGSK8 include luminescence, motility behaviour, biofilm formation, quorum sensing and haemolysin production. Thus inhibition/degradation of the virulence cascade would be an effective approach to contain Vibrio infections in aquatic animals. In this report, we demonstrate that the degradation intermediate of PHB effectively inhibits biofilm formation, luminescence, motility behaviour, haemolysin production and the N-acyl-homoserine lactone (AHL)-mediated quorum-sensing pathway in PUGSK8. Interestingly, the growth of Vibrio PUGSK8 remains unaffected in the presence of PHB, with PHB degradation being detected in the media. PHB depolymerase activity in Vibrio PUGSK8 results in the release of degradation intermediates include a short-chain β-hydroxy butyric acid, which inhibits the virulence cascade in Vibrio PUGSK8. Thus, a molecule that targets quorum sensing and the virulence cascade and which is species/strain-specific could prove to be an effective alternative to antimicrobial agents to control the pathogenesis of Vibrio, and thereby help to contain Vibrio outbreaks in aquatic systems.
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Affiliation(s)
- George Seghal Kiran
- Department of Food Science and Technology, Pondicherry University, Puducherry, India
| | - Sethu Priyadharshini
- Department of Food Science and Technology, Pondicherry University, Puducherry, India
| | - Alan D W Dobson
- School of Microbiology, University College Cork, Cork, Ireland
- Environmental Research Institute, University College Cork, Cork, Ireland
| | | | - Joseph Selvin
- Department of Microbiology, School of Life Sciences, Pondicherry University, Puducherry, India
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Sadeek SA, Abd El-Hamid SM, El-Shwiniy WH. Synthesis, spectroscopic characterization, thermal stability and biological studies of mixed ligand complexes of gemifloxacin drug and 2,2′-bipyridine with some transition metals. RESEARCH ON CHEMICAL INTERMEDIATES 2015. [DOI: 10.1007/s11164-015-2205-0] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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36
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Sadeek SA, Abd El-Hamid SM, El-Aasser MM. Synthesis, characterization, antimicrobial and cytotoxicity studies of some transition metal complexes with gemifloxacin. MONATSHEFTE FUR CHEMIE 2015. [DOI: 10.1007/s00706-015-1507-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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A case of intoxication due to a highly cytotoxic Bacillus cereus strain isolated from cooked chicken. Food Microbiol 2015; 46:195-199. [DOI: 10.1016/j.fm.2014.08.005] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2014] [Revised: 08/11/2014] [Accepted: 08/14/2014] [Indexed: 12/12/2022]
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Distribution of six exotoxin genes and production of L2-HBL and nheA proteins in six Bacillus cereus isolates from infant formula and produce. Food Sci Biotechnol 2015. [DOI: 10.1007/s10068-015-0050-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
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El-Shwiniy WH, Sadeek SA. Synthesis and characterization of new 2-cyano-2-(p-tolyl-hydrazono)-thioacetamide metal complexes and a study on their antimicrobial activities. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 137:535-546. [PMID: 25240146 DOI: 10.1016/j.saa.2014.08.124] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2014] [Accepted: 08/24/2014] [Indexed: 06/03/2023]
Abstract
2-Cyano-2-(p-tolyl-hydrazono)-thioacetamide (Cthta) reacted with V(IV), Zr(IV), Pd(II), Pt(IV), Ce(IV) and U(VI) in acetone as a solvent at room temperature to form a solid complexes with characteristic color for metal ion. The molar ratio for all synthesized complexes is M:Cthta=1:2 which was established from the results of chemical analysis. The isolated complexes have been characterized with their melting points, elemental analysis, magnetic properties, conductance measurements, mass, IR, UV-Vis. and (1)H NMR spectroscopic methods and thermal analyses. The results supported the formation of the complexes and indicated that the Cthta reacts as a bidentate ligand. The thermogravimetric and infrared spectroscopic data confirmed the presence of water in the composition of the complexes. The molar conductance values of all complexes in (DMSO) were found in the range 150.71-328.85S cm(2) mol(-1) at room temperature. The magnetic moments of the complexes were measured at room temperature. The kinetic parameters of thermogravimetric and its differential have been evaluated by using Coats Redfern (CR) and Horowitz-Metzeger (HM) methods. The ligand as well as their metal complexes were also evaluated for their antibacterial and antifungal activities.
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Affiliation(s)
- W H El-Shwiniy
- Department of Chemistry, Faculty of Science, Zagazig University, Zagazig, Egypt.
| | - S A Sadeek
- Department of Chemistry, Faculty of Science, Zagazig University, Zagazig, Egypt
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Synthesis and characterization, antimicrobial activity, DNA binding and DNA cleavage studies of new 5-chloro-2-[4-phenylthiazol-2-yl-iminomethyl]phenol metal complexes. J Mol Struct 2015. [DOI: 10.1016/j.molstruc.2014.11.015] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Rolny IS, Minnaard J, Racedo SM, Pérez PF. Murine model of Bacillus cereus gastrointestinal infection. J Med Microbiol 2014; 63:1741-1749. [PMID: 25231625 DOI: 10.1099/jmm.0.079939-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Bacillus cereus is a spore-forming micro-organism responsible for foodborne illness. In this study, we focus on the host response following intragastric challenge with a pathogenic B. cereus strain (B10502) isolated from a foodborne outbreak. C57BL/6J female mice were infected by gavage with strain B10502. Controls were administered with PBS. Infection leads to significant modification in relevant immune cells in the spleen, Peyer's patches (PP) and mesenteric lymph nodes (MLN). These findings correlated with an increase in the size of PP as compared with uninfected controls. Histological studies showed that B. cereus infection increased the ratio of intestinal goblet cells and induces mononuclear cell infiltrates in spleen at 5 days post-infection. Evaluation of cytokine mRNA expression demonstrated a significant increase in IFN-γ in MLN after 2 days of infection. The present work demonstrates that infection of mice with vegetative B. cereus is self-limited. Our findings determined relevant cell populations that were involved in the control of the pathogen through modification of the ratio and/or activation.
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Affiliation(s)
- Ivanna S Rolny
- Cátedra de Microbiología, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Calle 47 y 115-B1900AJI, La Plata, Argentina
| | - Jessica Minnaard
- Centro de Investigación y Desarrollo en Criotecnología de Alimentos (CONICET-CCT La Plata), Calle 47 y 116-B1900AJI, La Plata, Argentina
| | - Silvia M Racedo
- Cátedra de Microbiología, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Calle 47 y 115-B1900AJI, La Plata, Argentina
| | - Pablo F Pérez
- Centro de Investigación y Desarrollo en Criotecnología de Alimentos (CONICET-CCT La Plata), Calle 47 y 116-B1900AJI, La Plata, Argentina.,Cátedra de Microbiología, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Calle 47 y 115-B1900AJI, La Plata, Argentina
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Søborg DA, Hendriksen NB, Kroer N. Occurrence and expression of bacterial human virulence gene homologues in natural soil bacteria. FEMS Microbiol Ecol 2014; 90:520-32. [PMID: 25118010 DOI: 10.1111/1574-6941.12413] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2013] [Revised: 08/03/2014] [Accepted: 08/08/2014] [Indexed: 02/04/2023] Open
Abstract
The presence and in vitro expression of homologues to 22 bacterial human virulence determinants amongst culturable soil bacteria were investigated. About 25% of the bacterial isolates contained virulence gene homologues representing toxin (hblA, cytK2), adhesin (fimH), regulator (phoQ) and resistance (yfbI) determinants in pathogenic bacteria. The homologues of the toxin genes were found in Actinobacteria and Firmicutes (hblA), and in Firmicutes and Alpha- and Gammaproteobacteria (cytK2). The homologues to the type 1 fimbrial adhesin gene, fimH, and the L-Ara4N transferase gene, yfbI, were observed in Actinobacteria, Firmicutes and Gammaproteobacteria. The regulator gene, phoQ, was only found in Gammaproteobacteria. The presence of cytK2 in Alpha- and Gammaproteobacteria, fimH in Actinobacteria and Firmicutes, and hblA in Actinobacteria has not previously been described. A close sequence similarity (84-100%) was observed between the genes of environmental and clinical isolates, and expression assays suggested that the genes in some cases were expressed in vitro. The presence of functional virulence gene homologues underpins their importance for the survival of environmental bacteria. Furthermore, the high degree of sequence conservation to clinical sequences indicates that natural environments may be 'evolutionary cribs' of emerging pathogens.
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Affiliation(s)
- Ditte A Søborg
- Department of Environmental Science, Aarhus University, Roskilde, Denmark
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Zordok WA. Interaction of vanadium (IV) solvates (L) with second-generation fluoroquinolone antibacterial drug ciprofloxacin: spectroscopic, structure, thermal analyses, kinetics and biological evaluation (L=An, DMF, Py and Et3N). SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 129:519-536. [PMID: 24762540 DOI: 10.1016/j.saa.2014.02.087] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2013] [Revised: 02/02/2014] [Accepted: 02/19/2014] [Indexed: 06/03/2023]
Abstract
The preparation and characterization of the new solid complexes [VO(CIP)2L]SO4⋅nH2O, where L=aniline (An), dimethylformamide (DMF), pyridine (Py) and triethylamine (Et3N) in the reaction of ciprofloxacin (CIP) with VO(SO4)2·2H2O in ethanol. The isolated complexes have been characterized with their melting points, elemental analysis, IR spectroscopy, magnetic properties, conductance measurements, UV-Vis. and (1)H NMR spectroscopic methods and thermal analyses. The results supported the formation of the complexes and indicated that ciprofloxacin reacts as a bidentate ligand bound to the vanadium ion through the pyridone oxygen and one carboxylato oxygen. The activation energies, E(*); entropies, ΔS(*); enthalpies, ΔH(*); Gibbs free energies, ΔG(*), of the thermal decomposition reactions have been derived from thermo gravimetric (TGA) and differential thermo gravimetric (DTG) curves, using Coats-Redfern and Horowitz-Metzeger methods. The lowest energy model structure of each complex has been proposed by using the density functional theory (DFT) at the B3LYP/CEP-31G level of theory. The ligand and their metal complexes were also evaluated for their antibacterial activity against several bacterial species, such as Bacillus Subtilis (B. Subtilis), Staphylococcus aureus (S. aureus), Nesseria Gonorrhoeae (N. Gonorrhoeae), Pseudomonas aeruginosa (P. aeruginosa) and Escherichia coli (E. coli).
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Affiliation(s)
- Wael A Zordok
- Department of Chemistry, Faculty of Science, Zagazig University, Zagazig, Egypt; Department of Chemistry, University College of Quanfudha, Umm Al-Qura University, Saudi Arabia.
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Niazi A, Manzoor S, Asari S, Bejai S, Meijer J, Bongcam-Rudloff E. Genome analysis of Bacillus amyloliquefaciens Subsp. plantarum UCMB5113: a rhizobacterium that improves plant growth and stress management. PLoS One 2014; 9:e104651. [PMID: 25119988 PMCID: PMC4138018 DOI: 10.1371/journal.pone.0104651] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2014] [Accepted: 07/10/2014] [Indexed: 11/18/2022] Open
Abstract
The Bacillus amyloliquefaciens subsp. plantarum strain UCMB5113 is a Gram-positive rhizobacterium that can colonize plant roots and stimulate plant growth and defense based on unknown mechanisms. This reinforcement of plants may provide protection to various forms of biotic and abiotic stress. To determine the genetic traits involved in the mechanism of plant-bacteria association, the genome sequence of UCMB5113 was obtained by assembling paired-end Illumina reads. The assembled chromosome of 3,889,532 bp was predicted to encode 3,656 proteins. Genes that potentially contribute to plant growth promotion such as indole-3-acetic acid (IAA) biosynthesis, acetoin synthesis and siderophore production were identified. Moreover, annotation identified putative genes responsible for non-ribosomal synthesis of secondary metabolites and genes supporting environment fitness of UCMB5113 including drug and metal resistance. A large number of genes encoding a diverse set of secretory proteins, enzymes of primary and secondary metabolism and carbohydrate active enzymes were found which reflect a high capacity to degrade various rhizosphere macromolecules. Additionally, many predicted membrane transporters provides the bacterium with efficient uptake capabilities of several nutrients. Although, UCMB5113 has the possibility to produce antibiotics and biosurfactants, the protective effect of plants to pathogens seems to be indirect and due to priming of plant induced systemic resistance. The availability of the genome enables identification of genes and their function underpinning beneficial interactions of UCMB5113 with plants.
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Affiliation(s)
- Adnan Niazi
- Department of Animal Breeding and Genetics, SLU Global Bioinformatics Centre, Swedish University of Agricultural Sciences, Uppsala, Sweden
- * E-mail:
| | - Shahid Manzoor
- Department of Animal Breeding and Genetics, SLU Global Bioinformatics Centre, Swedish University of Agricultural Sciences, Uppsala, Sweden
- University of the Punjab, Lahore, Pakistan
| | - Shashidar Asari
- Department of Plant Biology, Linnéan Center for Plant Biology, Uppsala Biocenter, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Sarosh Bejai
- Department of Plant Biology, Linnéan Center for Plant Biology, Uppsala Biocenter, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Johan Meijer
- Department of Plant Biology, Linnéan Center for Plant Biology, Uppsala Biocenter, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Erik Bongcam-Rudloff
- Department of Animal Breeding and Genetics, SLU Global Bioinformatics Centre, Swedish University of Agricultural Sciences, Uppsala, Sweden
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Sadeek SA, Zordok WA, El-Farargy AF, El-Desoky SI. Synthesis, Spectral, Characterization, DFT and Biological Studies of New 3-[(3-Chlorophenyl)-hydrazono]-pentane-2,4-dione Metal Complexes. JOURNAL OF THE KOREAN CHEMICAL SOCIETY-DAEHAN HWAHAK HOE JEE 2014. [DOI: 10.5012/jkcs.2014.58.2.169] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Refat MS, Adam AMA, Sharshar T, Saad HA, Eldaroti HH. Utility of positron annihilation lifetime technique for the assessment of spectroscopic data of some charge-transfer complexes derived from N-(1-Naphthyl)ethylenediamine dihydrochloride. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 122:34-47. [PMID: 24291622 DOI: 10.1016/j.saa.2013.11.087] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2013] [Revised: 11/10/2013] [Accepted: 11/13/2013] [Indexed: 06/02/2023]
Abstract
In this work, structural, thermal, morphological, pharmacological screening and positron annihilation lifetime measurements were performed on the interactions between a N-(1-Naphthyl)ethylenediamine dihydrochloride (NEDA·2HCl) donor and three types of acceptors to characterize these CT complexes. The three types of acceptors include π-acceptors (quinol and picric acid), σ-acceptors (iodine) and vacant orbital acceptors (tin(IV) tetrachloride and zinc chloride). The positron annihilation lifetime parameters were found to be dependent on the structure, electronic configuration, the power of acceptors and molecular weight of the CT complexes. The positron annihilation lifetime spectroscopy can be used as a probe for the formation of charge-transfer (CT) complexes.
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Affiliation(s)
- Moamen S Refat
- Department of Chemistry, Faculty of Science, Taif University, Al-Haweiah, P.O. Box 888, 21974 Taif, Saudi Arabia; Department of Chemistry, Faculty of Science, Port Said University, Port Said, Egypt.
| | - Abdel Majid A Adam
- Department of Chemistry, Faculty of Science, Taif University, Al-Haweiah, P.O. Box 888, 21974 Taif, Saudi Arabia
| | - T Sharshar
- Department of Physics, Faculty of Science, Taif University, Al-Haweiah, P.O. Box 888, 21974 Taif, Saudi Arabia; Department of Physics, Faculty of Science, Kafrelsheikh University, Kafr El-Sheikh, Egypt
| | - Hosam A Saad
- Department of Chemistry, Faculty of Science, Taif University, Al-Haweiah, P.O. Box 888, 21974 Taif, Saudi Arabia; Department of Chemistry, Faculty of Science, Zagazig University, Zagazig, Egypt
| | - Hala H Eldaroti
- Department of Chemistry, Faculty of Education, Alzaeim Alazhari University, Khartoum, Sudan
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Detoxification of enterotoxigenic Bacillus cereus (JX455159) isolated from meat by a local strain of Lactobacillus plantarum (JX282192). ANN MICROBIOL 2014. [DOI: 10.1007/s13213-013-0662-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
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Sadeek S, El-Attar M, Abd El-Hamid S. Preparation and characterization of new tetradentate Schiff base metal complexes and biological activity evaluation. J Mol Struct 2013. [DOI: 10.1016/j.molstruc.2013.07.053] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Adam AMA, Refat MS, Saad HA. Spectral, thermal, XRD and SEM studies of charge-transfer complexation of hexamethylenediamine and three types of acceptors: π-, σ- and vacant orbital acceptors that include quinol, picric acid, bromine, iodine, SnCl4 and ZnCl2 acceptors. J Mol Struct 2013. [DOI: 10.1016/j.molstruc.2013.08.006] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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50
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Sadeek SA, Zordok WA, El-Shwiniy WH. Synthesis, Characterization, DFT Modeling and Antimicrobial Studies on the Ti(IV), Y(III) and Ce(IV) Ofloxacin Solid Complexes. JOURNAL OF THE KOREAN CHEMICAL SOCIETY-DAEHAN HWAHAK HOE JEE 2013. [DOI: 10.5012/jkcs.2013.57.5.574] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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