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Selepe TN, Maliehe TS. Bioflocculation of pollutants in wastewater using flocculant derived from Providencia huaxiensis OR794369.1. BMC Microbiol 2024; 24:39. [PMID: 38281910 PMCID: PMC10823601 DOI: 10.1186/s12866-023-03144-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Accepted: 12/07/2023] [Indexed: 01/30/2024] Open
Abstract
BACKGROUND Water pollution has become a major environmental and health concern due to increasing population and industrialisation. Microbial flocculants are promising agents for treatment of contaminated water owing to their effectiveness, eco-friendliness, and high biosafety levels. In this study, culture conditions of Providencia huaxiensis OR794369.1 were optimised and its bioflocculant was extracted, characterised and used to treat wastewater. RESULTS The maximum flocculating activity of 92% and yield of 3.5 g/L were obtained when cultivation conditions were: 3% inoculum size, starch, casein, initial pH of 6, cultivation temperature of 30 oC and 72 h of fermentation. The bioflocculant is an amorphous glycoprotein biomolecule with 37.5% carbohydrates, 27.9% protein, and 34.6% uronic acids. It is composed of hydroxyl, amino, alkanes, carboxylic acid and amines groups as its main functional structures. It was found to be safe to use as it demonstrated non-cytotoxic effects on bovine dermis and African green monkey kidney cells, illustrating median inhibitory concentration (IC50) values of 180 and > 500 µg/mL on both cell lines, respectively. It demonstrated the removal efficiencies of 90% on chemical oxygen demand (COD), 97% on biological oxygen demand (BOD) and 72% on Sulphur on coal mine wastewater. It also revealed the reduction efficacies of 98% (COD) and 92% (BOD) and 70% on Sulphur on domestic wastewater. CONCLUSION The bioflocculant was effective in reducing pollutants and thus, illustrated potential to be used in wastewater treatment process as an alternative.
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Affiliation(s)
- Tlou Nelson Selepe
- Department of Water and Sanitation, University of Limpopo, Private Bag X1106, Polokwane, 0727, South Africa.
| | - Tsolanku Sidney Maliehe
- Department of Water and Sanitation, University of Limpopo, Private Bag X1106, Polokwane, 0727, South Africa
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Mondol SM, Islam I, Islam MR, Shakil SK, Rakhi NN, Mustary JF, Amiruzzaman, Gomes DJ, Shahjalal HM, Rahaman MM. Genomic landscape of NDM-1 producing multidrug-resistant Providencia stuartii causing burn wound infections in Bangladesh. Sci Rep 2024; 14:2246. [PMID: 38278862 PMCID: PMC10817959 DOI: 10.1038/s41598-024-51819-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Accepted: 01/09/2024] [Indexed: 01/28/2024] Open
Abstract
The increasing antimicrobial resistance in Providencia stuartii (P. stuartii) worldwide, particularly concerning for immunocompromised and burn patients, has raised concern in Bangladesh, where the significance of this infectious opportunistic pathogen had been previously overlooked, prompting a need for investigation. The two strains of P. stuartii (P. stuartii SHNIBPS63 and P. stuartii SHNIBPS71) isolated from wound swab of two critically injured burn patients were found to be multidrug-resistant and P. stuartii SHNIBPS63 showed resistance to all the 22 antibiotics tested as well as revealed the co-existence of blaVEB-6 (Class A), blaNDM-1 (Class B), blaOXA-10 (Class D) beta lactamase genes. Complete resistance to carbapenems through the production of NDM-1, is indicative of an alarming situation as carbapenems are considered to be the last line antibiotic to combat this pathogen. Both isolates displayed strong biofilm-forming abilities and exhibited resistance to copper, zinc, and iron, in addition to carrying multiple genes associated with metal resistance and the formation of biofilms. The study also encompassed a pangenome analysis utilizing a dataset of eighty-six publicly available P. stuartii genomes (n = 86), revealing evidence of an open or expanding pangenome for P. stuartii. Also, an extensive genome-wide analysis of all the P. stuartii genomes revealed a concerning global prevalence of diverse antimicrobial resistance genes, with a particular alarm raised over the abundance of carbapenem resistance gene blaNDM-1. Additionally, this study highlighted the notable genetic diversity within P. stuartii, significant informations about phylogenomic relationships and ancestry, as well as potential for cross-species transmission, raising important implications for public health and microbial adaptation across different environments.
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Affiliation(s)
| | - Israt Islam
- Department of Microbiology, University of Dhaka, Dhaka, 1000, Bangladesh
| | - Md Rafiul Islam
- Department of Microbiology, University of Dhaka, Dhaka, 1000, Bangladesh
| | - Shahriar Kabir Shakil
- Department of Microbiology, University of Dhaka, Dhaka, 1000, Bangladesh
- Department of Biotechnology and Genetic Engineering, Noakhali Science and Technology University, Noakhali, 3814, Bangladesh
| | | | - Jannatul Ferdous Mustary
- Microbiology Department, Sheikh Hasina National Institute of Burn and Plastic Surgery, Dhaka, 1000, Bangladesh
| | - Amiruzzaman
- Department of Medicine, Sir Salimullah Medical College, Dhaka, 1000, Bangladesh
| | - Donald James Gomes
- Department of Microbiology, University of Dhaka, Dhaka, 1000, Bangladesh
| | - Hussain Md Shahjalal
- Department of Biochemistry and Molecular Biology, Jahangirnagar University, Savar, Dhaka, 1342, Bangladesh
| | - Md Mizanur Rahaman
- Department of Microbiology, University of Dhaka, Dhaka, 1000, Bangladesh.
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Yin Y, Wang S, Zhang K, Li Y, Liu W, Zhang Q, Zhang X, Kong X, An S, Zhang R, Zhang Z. Klebsiella pneumoniae in the intestines of Musca domestica larvae can assist the host in antagonizing the poisoning of the heavy metal copper. BMC Microbiol 2023; 23:383. [PMID: 38049761 PMCID: PMC10694927 DOI: 10.1186/s12866-023-03082-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Accepted: 10/23/2023] [Indexed: 12/06/2023] Open
Abstract
BACKGROUND Musca domestica larvae are common saprophytes in nature, promoting the material-energy cycle in the environment. However, heavy metal pollution in the environment negatively affects their function in material circulation. Our previous research found that some intestinal bacteria play an important role in the development of housefly, but the responses of microbial community to heavy metal stresses in Musca domestica is less studied. RESULTS In this study, CuSO4, CuSO4-Klebsiella pneumoniae mixture and CuSO4-K. pneumoniae phage mixture were added to the larval diet to analyze whether K. pneumoniae can protect housefly larvae against Cu2+ injury. Our results showed that larval development was inhibited when were fed with CuSO4, the bacterial abundance of Providencia in the intestine of larvae increased. However, the inhibition effects of CuSO4 was relieved when K. pneumoniae mixed and added in larval diets, the abundance of Providencia decreased. Electron microscope results revealed that K. pneumoniae showed an obvious adsorption effect on copper ion in vitro. CONCLUSIONS Based on the results we assume that K. pneumoniae could adsorb Cu2+, reduce Cu2+ impact on gut community structure. Our study explains the role of K. pneumoniae antagonizing Cu2+, which could be applied as a probiotic to saprophytic bioantagonistic metal contamination.
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Affiliation(s)
- Yansong Yin
- School of Basic Medical Science, Shandong First Medical University (Shandong Academy of Medical Sciences), Taian, 271016, Shandong, China
- Collaborative Innovation Center for the Origin and Control of Emerging Infectious Diseases, Shandong First Medical University (Shandong Academy of Medical Sciences), No. 619, Changchen Road, Taian, 271016, Shandong, China
| | - Shumin Wang
- School of Basic Medical Science, Shandong First Medical University (Shandong Academy of Medical Sciences), Taian, 271016, Shandong, China
- School of Life Science, Shandong First Medical University (Shandong Academy of Medical Sciences), Taian, 271016, Shandong, China
| | - Kexin Zhang
- School of Basic Medical Science, Shandong First Medical University (Shandong Academy of Medical Sciences), Taian, 271016, Shandong, China
- Collaborative Innovation Center for the Origin and Control of Emerging Infectious Diseases, Shandong First Medical University (Shandong Academy of Medical Sciences), No. 619, Changchen Road, Taian, 271016, Shandong, China
| | - Ying Li
- School of Basic Medical Science, Shandong First Medical University (Shandong Academy of Medical Sciences), Taian, 271016, Shandong, China
- Collaborative Innovation Center for the Origin and Control of Emerging Infectious Diseases, Shandong First Medical University (Shandong Academy of Medical Sciences), No. 619, Changchen Road, Taian, 271016, Shandong, China
| | - WenJuan Liu
- School of Basic Medical Science, Shandong First Medical University (Shandong Academy of Medical Sciences), Taian, 271016, Shandong, China
- Collaborative Innovation Center for the Origin and Control of Emerging Infectious Diseases, Shandong First Medical University (Shandong Academy of Medical Sciences), No. 619, Changchen Road, Taian, 271016, Shandong, China
| | - Qian Zhang
- School of Basic Medical Science, Shandong First Medical University (Shandong Academy of Medical Sciences), Taian, 271016, Shandong, China
- Collaborative Innovation Center for the Origin and Control of Emerging Infectious Diseases, Shandong First Medical University (Shandong Academy of Medical Sciences), No. 619, Changchen Road, Taian, 271016, Shandong, China
| | - Xinyu Zhang
- School of Basic Medical Science, Shandong First Medical University (Shandong Academy of Medical Sciences), Taian, 271016, Shandong, China
- Collaborative Innovation Center for the Origin and Control of Emerging Infectious Diseases, Shandong First Medical University (Shandong Academy of Medical Sciences), No. 619, Changchen Road, Taian, 271016, Shandong, China
| | - Xinxin Kong
- School of Basic Medical Science, Shandong First Medical University (Shandong Academy of Medical Sciences), Taian, 271016, Shandong, China
- Collaborative Innovation Center for the Origin and Control of Emerging Infectious Diseases, Shandong First Medical University (Shandong Academy of Medical Sciences), No. 619, Changchen Road, Taian, 271016, Shandong, China
| | - Sha An
- School of Basic Medical Science, Shandong First Medical University (Shandong Academy of Medical Sciences), Taian, 271016, Shandong, China
- Collaborative Innovation Center for the Origin and Control of Emerging Infectious Diseases, Shandong First Medical University (Shandong Academy of Medical Sciences), No. 619, Changchen Road, Taian, 271016, Shandong, China
| | - Ruiling Zhang
- School of Basic Medical Science, Shandong First Medical University (Shandong Academy of Medical Sciences), Taian, 271016, Shandong, China.
- Collaborative Innovation Center for the Origin and Control of Emerging Infectious Diseases, Shandong First Medical University (Shandong Academy of Medical Sciences), No. 619, Changchen Road, Taian, 271016, Shandong, China.
| | - Zhong Zhang
- School of Life Science, Shandong First Medical University (Shandong Academy of Medical Sciences), Taian, 271016, Shandong, China.
- Weifang Medical University, Weifang, 261021, Shandong, China.
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White JA, Khalek AA, Rodriguez J, Kandadai J, Hosameddin M, Gonzalez S. Providencia alcalifaciens in a patient with a staghorn calculus: a novel presentation. Diagn Microbiol Infect Dis 2023; 107:116055. [PMID: 37716218 DOI: 10.1016/j.diagmicrobio.2023.116055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2023] [Revised: 08/05/2023] [Accepted: 08/07/2023] [Indexed: 09/18/2023]
Abstract
A member of the Enterobacteriaceae family, Providencia alcalifaciens is typically recognized as a source of gastrointestinal illness. Although its pathogenicity is not well known, many studies have suggested its mechanism of action involves the invasion of the intestinal mucosal layer. Although P. alcalifaciens is a urease producing microorganism, it has not been associated with the formation of a staghorn calculus in the setting of a urinary tract infection. This organism is neither commonly pursued in research or investigation nor is it commonly tested for in the clinical setting. This is especially true when combined with other disease processes, such as calculus formation. The advancement of antibiotic resistance, such as carbapenemase-producing strains, should bring more attention and routine investigation to this organism in the acute stage of infection. In this case report we introduce a 43-year-old Cuban female, who presents with a left-sided staghorn calculi and urine culture positive for carbapenemase-producing P. alcalifaciens.
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Affiliation(s)
| | | | | | - Jagan Kandadai
- Nova Southeastern University College of Osteopathic Medicine, Davie, FL, USA
| | | | - Saul Gonzalez
- Department of Nephrology, Larkin Community Hospital, Hialeah, FL, USA
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Khataniar A, Das A, Baruah MJ, Bania KK, Rajkhowa S, Al-Hussain SA, Zaki MEA. An Integrative Approach to Study the Inhibition of Providencia vermicola FabD Using C2-Quaternary Indolinones. Drug Des Devel Ther 2023; 17:3325-3347. [PMID: 38024529 PMCID: PMC10657194 DOI: 10.2147/dddt.s427193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2023] [Accepted: 10/25/2023] [Indexed: 12/01/2023] Open
Abstract
Background The present study investigates the potential bioactivity of twelve experimentally designed C-2 quaternary indolinones against Providencia spp., a bacterial group of the Enterobacteriaceae family known to cause urinary tract infections. The study aims to provide insights into the bioactive properties of the investigated compounds and their potential use in developing novel treatments against Providencia spp. The experimental design of indolinones, combined with their unique chemical structure, makes them attractive candidates for further investigation. The results of this research may contribute to the development of novel therapeutic agents to combat Providencia spp. infections. Methods The synthesized indolinones (moL1-moL12) are evaluated to identify any superior activity, particularly focusing on moL12, which possesses aza functionality. The antimicrobial activities of all twelve compounds are tested in triplicates against six different Gram-positive and Gram-negative organisms, including P. vermicola (P<0.05). Computational methods have been employed to assess the pharmacokinetic properties of the compounds. Results Among the synthesized indolinones, moL12 exhibits superior activity compared to the other compounds with similar skeleton but different functional moieties. All six strains tested, including P. vermicola, demonstrated sensitivity to moL12. Computational studies support the pharmacokinetic properties of moL12, indicating acceptable absorption, distribution, metabolism, excretion, and toxicity characteristics. Conclusion Utilizing the PPI approach, we have identified a promising target, FabD, in Gram-negative bacteria. Our analysis has shown that moL12 exhibits significant potential in binding with FabD, thereby, might inhibit cell wall formation, and display superior antimicrobial activity compared to other compounds. Consequently, moL12 may be a potential therapeutic agent that could be used to combat urinary tract infections caused by Providencia spp. The findings of this research hold significant promise for the development of new and effective treatments for bacterial infections.
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Affiliation(s)
- Ankita Khataniar
- Centre for Biotechnology and Bioinformatics, Dibrugarh University, Dibrugarh, As-786004, India
| | - Abhichandan Das
- Centre for Biotechnology and Bioinformatics, Dibrugarh University, Dibrugarh, As-786004, India
| | - Manash J Baruah
- Department of Chemical Sciences, Tezpur University, Tezpur, As-784028, India
| | - Kusum K Bania
- Department of Chemical Sciences, Tezpur University, Tezpur, As-784028, India
| | - Sanchaita Rajkhowa
- Centre for Biotechnology and Bioinformatics, Dibrugarh University, Dibrugarh, As-786004, India
| | - Sami A Al-Hussain
- Department of Chemistry, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh, Saudi Arabia
| | - Magdi E A Zaki
- Department of Chemistry, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh, Saudi Arabia
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6
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Hanson MA, Grollmus L, Lemaitre B. Ecology-relevant bacteria drive the evolution of host antimicrobial peptides in Drosophila. Science 2023; 381:eadg5725. [PMID: 37471548 DOI: 10.1126/science.adg5725] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Accepted: 06/08/2023] [Indexed: 07/22/2023]
Abstract
Antimicrobial peptides are host-encoded immune effectors that combat pathogens and shape the microbiome in plants and animals. However, little is known about how the host antimicrobial peptide repertoire is adapted to its microbiome. Here, we characterized the function and evolution of the Diptericin antimicrobial peptide family of Diptera. Using mutations affecting the two Diptericins (Dpt) of Drosophila melanogaster, we reveal the specific role of DptA for the pathogen Providencia rettgeri and DptB for the gut mutualist Acetobacter. The presence of DptA- or DptB-like genes across Diptera correlates with the presence of Providencia and Acetobacter in their environment. Moreover, DptA- and DptB-like sequences predict host resistance against infection by these bacteria across the genus Drosophila. Our study explains the evolutionary logic behind the bursts of rapid evolution of an antimicrobial peptide family and reveals how the host immune repertoire adapts to changing microbial environments.
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Affiliation(s)
- M A Hanson
- Global Health Institute, School of Life Science, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
- Disease Ecology and Evolution, Biosciences, University of Exeter, Penryn, United Kingdom
| | - L Grollmus
- Global Health Institute, School of Life Science, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - B Lemaitre
- Global Health Institute, School of Life Science, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
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Salas B, Conway HE, Vacek DC, Vitek C, Schuenzel EL. Pathogenicity of multiple Providencia species (Enterobacteriales: Morganellaceae) to the mass-reared Mexican fruit fly (Diptera: Tephritidae). J Insect Sci 2023; 23:4. [PMID: 37220089 PMCID: PMC10469543 DOI: 10.1093/jisesa/iead024] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Revised: 03/22/2023] [Accepted: 04/28/2023] [Indexed: 05/25/2023]
Abstract
Mexican fruit fly (Anastrepha ludens (Loew)) (Diptera: Tephritidae) represents a major threat to fruit production in the Western Hemisphere. Sterile insect technique is used to suppress and eradicate wild populations. Success of this control method necessitates weekly production of hundreds of millions of flies, their sterilization by irradiation, and their aerial release. Diet needed to produce large fly numbers are conducive to the spread of bacteria. Pathogenic bacteria were isolated from 3 rearing facilities and from multiple sources: eggs, larvae, pupae and spent diet, and were found to include some isolates identified to the genus Providencia (Enterobacteriales: Morganellaceae). We identified 41 Providencia isolates and tested their pathogenicity to A. ludens. Based on 16s rRNA sequences, 3 groups were clustered into several species of Providencia with varying capacities to affect the Mexican fruit fly production. Isolates putatively identified as P. alcalifaciens/P. rustigianii were all pathogenic causing larval and pupal yield reduction of 46-64% and 37-57%, respectively. Among them, Providencia isolate 3006 was the most pathogenic reducing larval and pupae yield by 73 and 81%, respectively. Isolates identified as P. sneebia were not pathogenic. The final cluster, P. rettgeri/P. vermicola, were variable in pathogenicity with 3 isolates yielding like the control and the rest causing larval and pupal yield reduction of 26-53% and 23-51%, respectively. Isolates putatively identified as P. alcalifaciens/P. rustigianii were more virulent than P. rettgeri/P. vermicola. Accurate identification of species is needed to diagnose and monitor pathogenic versus nonpathogenic Providencia strains.
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Affiliation(s)
- Bacilio Salas
- United States Department of Agriculture, Animal and Plant Health Inspection Services, Plant Protection and Quarantine, Mission Laboratory, 22675 N. Moorefield Road, Moore Airbase, Building 6417, Edinburg, TX 78541, USA
| | - Hugh E Conway
- United States Department of Agriculture, Animal and Plant Health Inspection Services, Plant Protection and Quarantine, Mission Laboratory, 22675 N. Moorefield Road, Moore Airbase, Building 6417, Edinburg, TX 78541, USA
| | - Don C Vacek
- United States Department of Agriculture, Animal and Plant Health Inspection Services, Plant Protection and Quarantine, Mission Laboratory, 22675 N. Moorefield Road, Moore Airbase, Building 6417, Edinburg, TX 78541, USA
| | - Cristopher Vitek
- Department of Biology, University of Texas Rio Grande Valley, Edinburg, TX 78539, USA
- Center for Vector-Borne Disease, University of Texas Rio Grande Valley, Edinburg, TX 78539, USA
| | - Erin L Schuenzel
- Department of Biology, University of Texas Rio Grande Valley, Edinburg, TX 78539, USA
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Yang J, Zhao ZQ, Wang M, Yu KF, Zhang T, Lin H, Zheng HB. Biodegradation of tylosin in swine wastewater by Providencia stuartii TYL-Y13: Performance, pathway, genetic background, and risk assessment. J Hazard Mater 2022; 440:129716. [PMID: 35952431 DOI: 10.1016/j.jhazmat.2022.129716] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Revised: 07/27/2022] [Accepted: 08/03/2022] [Indexed: 06/15/2023]
Abstract
Microbial bioremediation offers a solution to the problem of residual antibiotics in wastewater associated with animal farms. Efficient degradation of antibiotic residues depends upon the genetic make-up of microbial degraders, which requires a comprehensive understanding of the degradation mechanisms. In this study, a novel, efficient tylosin (TYL)-degrading bacterium, Providencia stuartii TYL-Y13 (Y13) was isolated, which could completely degrade 100 mg/L TYL within 15 h under optimal operating conditions at 40 ℃, pH 7.0 %, and 1 % (v/v) bacterial inoculation rate. Whole genome sequencing revealed that strain Y13 consists of a circular chromosome and two plasmids. A new biodegradation pathway of TYL including desugarification, hydrolysis, and reduction reactions was proposed through the analysis of biodegradation products. It was demonstrated that strain Y13 gradually decreased the biotoxicity of TYL and its metabolites based on the results of the ecological structural activity relationships (ECOSAR) model analysis and toxicity assessment. Moreover, Y13 promoted the reduction of the target macrolide resistance genes in wastewater and disappeared within 84 h. These results shed new light on the mechanism of TYL biodegradation and better utilization of microbes to remediate TYL contamination.
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Affiliation(s)
- Jian Yang
- Key Laboratory of Soil Contamination Bioremediation of Zhejiang Province, College of Environmental and Resources Sciences, Zhejiang A&F University, Hangzhou 311300, China
| | - Zhuo-Qun Zhao
- Key Laboratory of Soil Contamination Bioremediation of Zhejiang Province, College of Environmental and Resources Sciences, Zhejiang A&F University, Hangzhou 311300, China
| | - Min Wang
- Key Laboratory of Soil Contamination Bioremediation of Zhejiang Province, College of Environmental and Resources Sciences, Zhejiang A&F University, Hangzhou 311300, China
| | - Ke-Fei Yu
- Key Laboratory of Soil Contamination Bioremediation of Zhejiang Province, College of Environmental and Resources Sciences, Zhejiang A&F University, Hangzhou 311300, China
| | - Tao Zhang
- Key Laboratory of Soil Contamination Bioremediation of Zhejiang Province, College of Environmental and Resources Sciences, Zhejiang A&F University, Hangzhou 311300, China
| | - Hui Lin
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Institute of Environment, Resource, Soil and Fertilizers, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China.
| | - Hua-Bao Zheng
- Key Laboratory of Soil Contamination Bioremediation of Zhejiang Province, College of Environmental and Resources Sciences, Zhejiang A&F University, Hangzhou 311300, China.
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Alves IG, Rabelo G. [Album/Report by the Pequenas Irmãs da Divina Providência: records of social and medical assistance in the coal-producing region of southern Santa Catarina, 1955-1957]. Hist Cienc Saude Manguinhos 2022; 29:1063-1084. [PMID: 36542038 DOI: 10.1590/s0104-59702022000400011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2021] [Accepted: 07/27/2021] [Indexed: 06/04/2023]
Abstract
During the first half of the twentieth century, the coal-producing region of Santa Catarina state underwent intense industrialization that directly impacted various ways of life; various health problems emerged in the region as a result of coal mining and impeded economic progress. As the government was unable to meet health demands, local businesses established partnerships with female religious orders that provided assistance services in the villages where workers lived. As part of such a partnership, the Pequenas Irmãs da Divina Providência created an album of texts, drawings, and photographs as a report describing their activities from 1955 to 1957 in one such village in the region.
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Affiliation(s)
- Ismael Gonçalves Alves
- Professor, Programa de Pós-graduação em Desenvolvimento Socioeconômico/Universidade do Extremo Sul Catarinense. Criciúma - SC - Brasil
| | - Giani Rabelo
- Professora, Programa de Pós-graduação em Educação/Universidade do Extremo Sul Catarinense. Criciúma - SC - Brasil
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Luo J, Ruan X, Chen W, Chen S, Ding Z, Chen A, Li D. Abiotic transformation of atrazine in aqueous phase by biogenic bixbyite-type Mn 2O 3 produced by a soil-derived Mn(II)-oxidizing bacterium of Providencia sp. J Hazard Mater 2022; 436:129243. [PMID: 35739762 DOI: 10.1016/j.jhazmat.2022.129243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2022] [Revised: 05/14/2022] [Accepted: 05/24/2022] [Indexed: 06/15/2023]
Abstract
Recently, biogenic Mn oxides (BioMnOx) are considered as the promising degradation agents for environmental organic contaminants. However, little information is available for the degradation of atrazine by BioMnOx. In this work, BioMnOx, generated by a soil-derived Mn(II)-oxidizing bacterium, Providencia sp. LLDRA6, was explored to degrade atrazine. To begin with, collective results from mineral characterization analyses demonstrated that this BioMnOx was biogenic bixbyite-type Mn2O3. After that, purified biogenic Mn2O3 was found to exhibit a much higher removal efficiency for atrazine in aqueous phase, as compared to unpurified biogenic Mn2O3 and LLDRA6 biomass. During the atrazine removal by biogenic Mn2O3, six intermediate degradation products were discovered, comprising deethylatrazine (DEA), hydroxylatrazine (HA), deethylhydroxyatrazine (DEHA), ammeline, cyanuric acid, and 5-methylhexahydro-1,3,5-triazine-2-thione (MTT). Particularly, the intermediate, MTT, was considered as a new degradation product of atrazine, which was not described previously. Meanwhile, Mn(II) ions were released from biogenic Mn2O3, and on the surface of biogenic Mn2O3, the content of hydroxyl O species increased at the expense of that of lattice and water O species, but the fundamental crystalline structure of this Mn oxide remained unchanged. Additionally, no dissociative Mn(III) was found to involve in atrazine degradation. In summary, these results demonstrated that both the non-oxidative and oxidative reactions underlay the degradation of atrazine by biogenic Mn2O3.
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Affiliation(s)
- Jun Luo
- School of Life Sciences and Chemistry, Hunan University of Technology, Zhuzhou 412007, China; Hunan Provincial Engineering Research Center of Lily Germplasm Resource Innovation and Deep Processing, Hunan University of Technology, Zhuzhou 412007, China
| | - Xiaofang Ruan
- School of Life Sciences and Chemistry, Hunan University of Technology, Zhuzhou 412007, China
| | - Wuying Chen
- Hunan Plant Protection Institute, Hunan Academy of Agricultural Sciences, Changsha 410125, China
| | - Sha Chen
- School of Life Sciences and Chemistry, Hunan University of Technology, Zhuzhou 412007, China; Hunan Provincial Engineering Research Center of Lily Germplasm Resource Innovation and Deep Processing, Hunan University of Technology, Zhuzhou 412007, China
| | - Zhexu Ding
- Jiangsu Provincial Key Laboratory for Organic Solid Waste Utilization, Nanjing Agricultural University, Nanjing 210095, China
| | - Ang Chen
- Hunan Plant Protection Institute, Hunan Academy of Agricultural Sciences, Changsha 410125, China
| | - Ding Li
- School of Life Sciences and Chemistry, Hunan University of Technology, Zhuzhou 412007, China; Hunan Provincial Engineering Research Center of Lily Germplasm Resource Innovation and Deep Processing, Hunan University of Technology, Zhuzhou 412007, China.
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Portz L, Manzolli RP, Villate-Daza DA, Fontán-Bouzas Á. Where does marine litter hide? The Providencia and Santa Catalina Island problem, SEAFLOWER Reserve (Colombia). Sci Total Environ 2022; 813:151878. [PMID: 34826464 DOI: 10.1016/j.scitotenv.2021.151878] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Revised: 11/17/2021] [Accepted: 11/18/2021] [Indexed: 06/13/2023]
Abstract
The SEAFLOWER Biosphere Reserve (SBR) is the largest Marine Protected Area in the Caribbean Sea and the second largest in Latin America. Marine protected areas are under pressure from various stressors, one of the most important issues being pollution by marine litter, especially plastic. In this study our aim is to establish the distribution pattern and potential sources of solid waste in the different marine/coastal ecosystems of the islands of Providencia and Santa Catalina (SBR), as well as assess any interconnections between these ecosystems. At the same time, the distribution characteristics of marine litter in the different compartments facilitated a more dynamic understanding of the load of marine litter supplied by the islands, both locally and externally. We observed that certain ecosystems, principally back-beach vegetation and mangroves, act as crucial marine litter accumulation zones. Mangroves are important hotspots for plastic accumulation, with densities above eight items/m2 (minimum 8.38 and maximum 10.38 items/m2), while back-beach vegetation (minimum 1.43 and maximum 7.03 items/m2) also removes and stores a portion of the marine litter that arrives on the beaches. Tourist beaches for recreational activities have a low density of marine litter (minimum 0.01 and maximum 0.72 items/m2) due to regular clean-ups, whereas around non-tourist beaches, there is a greater variety of sources and accumulation (minimum 0.31 and maximum 5.41 items/m2). The low density of marine litter found on corals around the island (0-0.02 items/m2) indicates that there is still no significant marine litter stream to the coral reefs. Identifying contamination levels in terms of marine litter and possible flows between ecosystems is critical for adopting management and reduction strategies for such residues.
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Affiliation(s)
- Luana Portz
- Civil and Environmental Department, Universidad de la Costa, Calle 58 # 55 - 66, Barranquilla, Colombia.
| | | | | | - Ángela Fontán-Bouzas
- Centro de Investigación Mariña (CIM), Universidade de Vigo, GEOMA, Vigo 36310, Spain; Physics Department & CESAM - Centre of Environmental and Marine Studies, University of Aveiro, Portugal.
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Balakrishnan P, Mohan S. Treatment of triclosan through enhanced microbial biodegradation. J Hazard Mater 2021; 420:126430. [PMID: 34252677 DOI: 10.1016/j.jhazmat.2021.126430] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Revised: 06/15/2021] [Accepted: 06/16/2021] [Indexed: 06/13/2023]
Abstract
Triclosan (TCS) is extensively used in healthcare and personal care products as an antibacterial agent. Due to the persistent and toxic nature of TCS, it is not completely degraded in the biological wastewater treatment process. In this research work, identification of TCS degrading bacteria from municipal wastewater sludge and applying the same as bioaugmentation treatment for wastewater have been reported. Based on the 16S rRNA analysis of wastewater sludge, it was found that Providencia rettgeri MB-IIT strain was active and able to grow in higher TCS concentration. The identified bacterial strain was able to use TCS as carbon and energy source for its growth. The biodegradation experiment was optimized for the operational parameters viz. pH (5-10), inoculum size (1-5% (v/v)) and different initial concentration (2, 5, and 10 mg/L) of TCS. During the TCS degradation process, manganese peroxidase (MnP) and laccase (LAC) enzyme activity and specific growth rate of P. rettgeri strain were maximum at pH=7% and 2% (v/v) inoculum size, resulting in 98% of TCS removal efficiency. A total of six intermediate products were identified from the Liquid chromatography-high-resolution mass spectrometry (LC-HRMS) analysis, and the two mechanisms responsible for the degradation of TCS have been elucidated. The study highlights that P. rettgeri MB-IIT strain could be advantageously used to degrade triclosan present in the wastewater.
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Affiliation(s)
- P Balakrishnan
- Environmental and Water Resources Engineering Division, Department of Civil Engineering, Indian Institute of Technology Madras, Chennai 600036, Tamil Nadu, India.
| | - S Mohan
- Environmental and Water Resources Engineering Division, Department of Civil Engineering, Indian Institute of Technology Madras, Chennai 600036, Tamil Nadu, India.
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13
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Garcés-Ordóñez O, Saldarriaga-Vélez JF, Espinosa-Díaz LF. Marine litter pollution in mangrove forests from Providencia and Santa Catalina islands, after Hurricane IOTA path in the Colombian Caribbean. Mar Pollut Bull 2021; 168:112471. [PMID: 34000707 DOI: 10.1016/j.marpolbul.2021.112471] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Revised: 05/03/2021] [Accepted: 05/05/2021] [Indexed: 06/12/2023]
Abstract
Marine litter in mangroves comes mainly from poor waste management practices and its abundance is increased by natural catastrophes occurrence that affects coastal settlements, as occurred in November-2020, when two hurricanes (ETA and IOTA) destroyed homes and deposited litters in mangroves of the Providencia and Santa Catalina islands, in the Colombian Caribbean. This study aims to assess the litter pollution in mangrove forests of these islands after Hurricane IOTA. Litter pollution was high in mangroves near urban areas and low in mangroves with little urban influence. In three mangrove sectors with high pollution, litter densities of 0.4-1.4 items m-2 and masses of 0.1-1.2 kg m-2 were determined; the majority were megalitter (sizes >1 m). Plastics were the most abundant (>60%). Local community is aware of the litter pollution problem and their participation in scientific research and mangroves recovery is key to understanding the impacts of natural and anthropogenic events and for ecosystem conservation.
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Affiliation(s)
- Ostin Garcés-Ordóñez
- Instituto de Investigaciones Marinas y Costeras "José Benito Vives de Andréis" - INVEMAR, Santa Marta, Colombia; Red de Vigilancia para la Conservación y Protección de las Aguas Marinas y Costeras de Colombia - REDCAM, Santa Marta, Colombia; Red de Investigación de los Estresores Marino Costeros de Latinoamérica y el Caribe - REMARCO, Santa Marta, Colombia.
| | - Juan F Saldarriaga-Vélez
- Instituto de Investigaciones Marinas y Costeras "José Benito Vives de Andréis" - INVEMAR, Santa Marta, Colombia
| | - Luisa F Espinosa-Díaz
- Instituto de Investigaciones Marinas y Costeras "José Benito Vives de Andréis" - INVEMAR, Santa Marta, Colombia; Red de Vigilancia para la Conservación y Protección de las Aguas Marinas y Costeras de Colombia - REDCAM, Santa Marta, Colombia; Red de Investigación de los Estresores Marino Costeros de Latinoamérica y el Caribe - REMARCO, Santa Marta, Colombia.
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Huang S, Wang Y, Tang C, Jia H, Wu L. Speeding up selenite bioremediation using the highly selenite-tolerant strain Providencia rettgeri HF16-A novel mechanism of selenite reduction based on proteomic analysis. J Hazard Mater 2021; 406:124690. [PMID: 33296764 DOI: 10.1016/j.jhazmat.2020.124690] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Revised: 11/24/2020] [Accepted: 11/24/2020] [Indexed: 06/12/2023]
Abstract
Selenite in the environment is extremely biotoxic, thus, the biotransformation of selenite into selenium nanoparticles (SeNPs) by microorganisms is gaining increasing interest. However, the relatively low selenite tolerance and slow processing by known microorganisms limit its application. In this study, a highly selenite-resistant strain (up to 800 mM) was isolated from coalmine soil and identified as Providencia rettgeri HF16. Remarkably, 5 mM selenite was entirely transformed by this strain within 24 h, and SeNPs were detected as early as 2 h of incubation, which is a more rapid conversion than that described for other microorganisms. The SeNPs were spherical in shape with diameters ranging from 120 nm to 295 nm, depending on the incubation time. Moreover, in vitro selenite-reduction activity was detected in the cytoplasmic protein fraction with NADPH or NADH serving as electron donors. Proteomics analysis and key enzyme activity tests revealed the presence of a sulfite reductase-mediated selenite reduction pathway. To our knowledge, this is the first report to identify the involvement of sulfite reductase in selenite reduction under physiological conditions. P. rettgeri HF16 could be a suitable and robust biocatalyst for the bioremediation of selenite, and would accelerate the efficient and economical synthesis of selenium nanoparticles.
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Affiliation(s)
- ShengWei Huang
- Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, Anhui, China; Key Laboratory of Environmental Toxicology and Pollution Control Technology of Anhui Province, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230026, Anhui, China
| | - Yuting Wang
- The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei 230001, Anhui, China; Intelligent Pathology Institute, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei 230036, Anhui, China
| | - Caiguo Tang
- Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, Anhui, China; Key Laboratory of Environmental Toxicology and Pollution Control Technology of Anhui Province, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230026, Anhui, China
| | - HuiLing Jia
- Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, Anhui, China; School of Life Sciences, University of Science and Technology of China, Hefei 230026, Anhui, China
| | - Lifang Wu
- Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, Anhui, China; Key Laboratory of Environmental Toxicology and Pollution Control Technology of Anhui Province, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230026, Anhui, China; School of Life Sciences, University of Science and Technology of China, Hefei 230026, Anhui, China.
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Zhang H, Li Z, Dai C, Wang P, Fan S, Yu B, Qu Y. Antibacterial properties and mechanism of selenium nanoparticles synthesized by Providencia sp. DCX. Environ Res 2021; 194:110630. [PMID: 33345899 DOI: 10.1016/j.envres.2020.110630] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2020] [Revised: 11/27/2020] [Accepted: 12/14/2020] [Indexed: 05/21/2023]
Abstract
Selenium nanoparticles (SeNPs) have attracted great interest as a potential antimicrobial agent. However, there is limited research on the antibacterial activity and possible mechanisms of biosynthesized SeNPs. In this study, spherical bio-SeNPs with an average size of 120 nm were synthesized by strain Providencia sp. DCX. The SeNPs were further applied to investigate the antibacterial properties of model bacteria, including Gram-positive (Staphylococcus aureus, Bacillus cereus and Bacillus subtilis) and Gram-negative bacteria (Pseudomonas aeruginosa, Escherichia coli and Vibrio parahemolyticus). The biosynthesized SeNPs demonstrated strong inhibition activity against the growth of these pathogens. When treated with 500 mg/L SeNPs, most of the tested bacteria were destructed within 12 h, among which the mortality rates of Gram-negative bacteria were much better. The leakage tests illustrated that there existed more proteins and polysaccharides outside the cells after reacted with bio-SeNPs. It was indicated that the leakages of proteins and polysaccharides were caused by permeability changes of membranes and the disruption of cell walls. And the change of reactive oxygen species (ROS) intensity indicated that oxidative damage may play the significant role in the antibacterial processes. The results showed that several bacteria could be effectively inhibited and destructed, suggesting the potential of using the biosynthesized SeNPs as antibacterial agents for bacterial infectious diseases.
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Affiliation(s)
- Henglin Zhang
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, China
| | - Zheng Li
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, China
| | - Chunxiao Dai
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, China
| | - Ping Wang
- Dalian Product Quality Inspection and Testing Institute Co., Ltd., Dalian, 116024, China
| | - Shuling Fan
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, China
| | - Bin Yu
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, China
| | - Yuanyuan Qu
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, China.
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Zhang C, Wu X, Wu Y, Li J, An H, Zhang T. Enhancement of dicarboximide fungicide degradation by two bacterial cocultures of Providencia stuartii JD and Brevundimonas naejangsanensis J3. J Hazard Mater 2021; 403:123888. [PMID: 33264954 DOI: 10.1016/j.jhazmat.2020.123888] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Revised: 08/13/2020] [Accepted: 08/22/2020] [Indexed: 06/12/2023]
Abstract
Bioremediation is commonly conducted by microbial consortia rather than individual species in natural environments. Biodegradation of dicarboximide fungicides in brunisolic soil were significantly enhanced by two bacterial cocultures of Providencia stuartii JD and Brevundimonas naejangsanensis J3. The cocultures degraded 98.42 %, 95.44 %, and 96.81 % of 50 mg/L dimethachlon, iprodione, and procymidone in liquid culture within 6 d respectively, whose efficiency was 1.23 and 1.26, 1.25 and 1.23, and 1.24 and 1.24 times of strains JD and J3, respectively. The cocultures could effectively degrade dimethachlon, iprodione and procymidone to simple products. Moreover, the cocultures immobilized in a charcoal-alginate-chitosan carrier obviously surpassed free cocultures in terms of degradability, stability and reusability. In the field brunisolic soils treated by immobilized cocultures, 96.74 % of 20.25 kg a.i./ha dimethachlon, 95.02 % of 7.50 kg a.i./ha iprodione and 96.27 % of 7.50 kg a.i./ha procymidone were degraded after 7 d, respectively. Moreover, the lower half-lifes (1.53, 1.59 and 1.57 d) by immobilized cocultures were observed, as compared to free cocultures (3.60, 4.03 and 3.92 d) and natural dissipation (21.33, 20.51 and 20.09 d). This study highlights that strains JD and J3 have significant synergetic degradation advantages in rapid bioremediation of dicarboximide fungicide contamination sites.
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Affiliation(s)
- Cheng Zhang
- Key Laboratory of Modern Agricultural Equipment and Technology, Ministry of Education, College of Agricultural Engineering, Jiangsu University, Zhenjiang, Jiangsu, 212013, China; Department of Plant Protection, Institute of Crop Protection, Research Center for Engineering Technology of Kiwifruit, Guizhou Engineering Research Center of Fruit Crops, College of Agriculture, Guizhou University, Guiyang, Guizhou, 550025, China; State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, Guizhou, 550081, China
| | - Xiaomao Wu
- Department of Plant Protection, Institute of Crop Protection, Research Center for Engineering Technology of Kiwifruit, Guizhou Engineering Research Center of Fruit Crops, College of Agriculture, Guizhou University, Guiyang, Guizhou, 550025, China.
| | - Yanyou Wu
- Key Laboratory of Modern Agricultural Equipment and Technology, Ministry of Education, College of Agricultural Engineering, Jiangsu University, Zhenjiang, Jiangsu, 212013, China; State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, Guizhou, 550081, China.
| | - Jiaohong Li
- Department of Plant Protection, Institute of Crop Protection, Research Center for Engineering Technology of Kiwifruit, Guizhou Engineering Research Center of Fruit Crops, College of Agriculture, Guizhou University, Guiyang, Guizhou, 550025, China
| | - Huaming An
- Department of Plant Protection, Institute of Crop Protection, Research Center for Engineering Technology of Kiwifruit, Guizhou Engineering Research Center of Fruit Crops, College of Agriculture, Guizhou University, Guiyang, Guizhou, 550025, China
| | - Tao Zhang
- Key Laboratory of Modern Agricultural Equipment and Technology, Ministry of Education, College of Agricultural Engineering, Jiangsu University, Zhenjiang, Jiangsu, 212013, China
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Sharma S, Bora P, Singla N, Gupta V, Chander J. Isolation of Morganella Morganii and Providencia Species from Clinical Samples in a Tertiary Care Hospital in North India. Infect Disord Drug Targets 2021; 21:84-89. [PMID: 31994472 DOI: 10.2174/1871526520666200128162646] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Revised: 11/06/2019] [Accepted: 12/26/2019] [Indexed: 06/10/2023]
Abstract
INTRODUCTION The members of the tribe Proteeae, Morganella and Providencia are being increasingly recognized as important pathogens. The spectrum of disease caused by them is wide and in reported cases, the mortality is high. Previously both of these pathogens were considered to be rare pathogens as the potential to cause nosocomial transmission and infection was not much studied. But their phenomenal evolution and increase in multidrug-resistance (MDR) strains of these pathogens are posing a major threat toward public health throughout the world. METHODS This present study was carried out from July 2018 to December 2018 on all the pus and body fluid samples that were received in the Department of Microbiology. Samples were processed as per the standard Microbiological guidelines and also were analyzed for their antimicrobial susceptibility profile as per Clinical Laboratory Standards Institute. RESULTS Out of 8425 samples received, 2140 were culture positive, amongst which 19 samples (0.89%) were positive for Providencia species (9) and Morganella morganii(10). The male : female ratio of these 19 patients was 2.8 : 1 and maximum patients (13) belonged to 20-60 years. As far as risk factors are concerned, maximum patients were diabetics (7) followed by abnormal liver function tests (6), concomitant UTI (6), history of invasive procedure (5), prior exposure to antibiotics (5) and urinary catheterization (4). About 6 were polymicrobial infections. Antibiotic susceptibility patterns revealed that Providencia strains were sensitive to ampicillin- sulbactum (77.7%) and amikacin (77.7%), while all Morganella strains were 100% sensitive to tobramycin and piperacillintazobactam. CONCLUSION This study heralds in need for more research in this area as infections caused by these two pathogens are on the rise. Moreover, resistance to antimicrobials is also an increasingly common problem thus delaying the treatment and prognosis of the disease.
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Affiliation(s)
- Shiwani Sharma
- Department of Microbiology, Government Medical College Hospital, Chandigarh, India
| | - Prapti Bora
- Department of Microbiology, Government Medical College Hospital, Chandigarh, India
| | - Nidhi Singla
- Department of Microbiology, Government Medical College Hospital, Chandigarh, India
| | - Varsha Gupta
- Department of Microbiology, Government Medical College Hospital, Chandigarh, India
| | - Jagdish Chander
- Department of Microbiology, Government Medical College Hospital, Chandigarh, India
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Blanco Blanco J, Ballesté Torralba J. [Local control treatment of bacteria found present in an infected bed sore by means of a hydropolymer dressing with ionic silver]. Rev Enferm 2009; 32:7-66. [PMID: 20014620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Every chronic wound has microorganisms present on its surface and therefore, its contamination is universal and unavoidable, but the majority of these wounds are not infected. It is important, therefore, to refine the diagnosis of infection indentifying the microorganisms which have succeeded in gaining access to the submarginal tissues in order to be able to prevent unnecessary or inappropriate antibiotic treatment and to lessen possible complications. A high level of bacteria present, close to 105 "UFC" per gram of tissue, even though this does not manifest a clinical infection, might interfere with the repair mechanisms and impede cicatrization of the wound. Due to this difficulty to identify in a precise manner the microorganisms which cause an infection, those patients who have sepsis related to bed sores are habitually treated empirically with wide spectrum range antibiotics, potentially more toxic and often more expensive. But it is important to restrict the use of local antibiotics when treating chronic wounds and to prioritize the use of cleaning methods and diverse debridement methods in order to lower the presence of bacteria. The use of systemic antibiotics should be limited to precise indications, considering that today we have at our disposal alternate treatments with topical antibiotics, principally dressings which contain silver.
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Abstract
The authors report a case of dark purple urine in a woman with bowel obstruction and bilateral percutaneous nephrostomy urinary diversion for 30 years. This colour was due to the presence of high urinary concentrations of 3-indoxyl sulphate due to the enzymatic activity of Providencia rettgeri. A favourable course was observed in response to antibiotics.
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Affiliation(s)
- Yaël Lazimy
- Service de Gynécologie-Obstétrique-Reproduction et de Médecine Foetale, CHU de Nice
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Bushmarinov IS, Ovchinnikova OG, Kocharova NA, Toukach FV, Torzewska A, Shashkov AS, Knirel YA, Rozalski A. Structure of the O-polysaccharide from the lipopolysaccharide of Providencia alcalifaciens O29. Carbohydr Res 2006; 341:1181-5. [PMID: 16630597 DOI: 10.1016/j.carres.2006.03.022] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2006] [Revised: 03/10/2006] [Accepted: 03/17/2006] [Indexed: 11/24/2022]
Abstract
The O-polysaccharide was obtained by a mild acid degradation of the lipopolysaccharide of Providencia alcalifaciens O29. Structural studies were performed using sugar and methylation analyses along with 1H and 13C NMR spectroscopy, including two-dimensional 1H, 1H COSY, TOCSY, ROESY, H-detected 1H, 13C HSQC and HMBC experiments. On the basis of the data obtained, the following structure of the branched tetrasaccharide repeating unit of the O-polysaccharide was established: [structure: see text].
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Affiliation(s)
- Ivan S Bushmarinov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 119991 Moscow, Russian Federation
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Murata T, Iida T, Shiomi Y, Tagomori K, Akeda Y, Yanagihara I, Mushiake S, Ishiguro F, Honda T. A large outbreak of foodborne infection attributed to Providencia alcalifaciens. J Infect Dis 2001; 184:1050-5. [PMID: 11574921 DOI: 10.1086/323458] [Citation(s) in RCA: 60] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2001] [Revised: 06/25/2001] [Indexed: 11/03/2022] Open
Abstract
The enteropathogenicity of Providencia alcalifaciens, a member of the family Enterobacteriaceae, has not yet been well established. In November 1996, a large outbreak of foodborne infection occurred in Fukui, Japan. In this study, the etiology of the outbreak was investigated. No other recognized enteropathogens were detected in patient fecal samples, but P. alcalifaciens was detected in 7 of 18 samples. The isolates were found to be clonal by pulsed-field gel electrophoresis. The patients who presented with gastroenteritis had elevated levels of specific antibody against the isolated P. alcalifaciens. The isolates showed invasion of Caco-2 cells and fluid accumulation in rabbit ileal loops. This study strongly suggests that the outbreak was caused by P. alcalifaciens. This is the first report of a large outbreak of foodborne infection attributed to the organism and provides definitive evidence that P. alcalifaciens is a causative agent of gastroenteritis.
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Affiliation(s)
- T Murata
- Department of Bacterial Infections, Research Institute for Microbial Diseases, Osaka University, Suita, Osaka, Japan
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Lipsky BA. Managing urinary tract infections in men. Hosp Pract (1995) 2000; 35:53-9; discussion 59-60; quiz 144. [PMID: 10645989 DOI: 10.3810/hp.2000.01.181] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/14/2023]
Abstract
Despite the obvious genitourinary differences between the sexes, management of lower urinary tract infections in men is based largely on standards developed from studies in women. This has helped foster misconceptions that, among other problems, add needless complexity and expense to diagnosis and treatment of male patients.
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Affiliation(s)
- B A Lipsky
- University of Washington School of Medicine, USA
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Pinto V, Telenti M, Bernaldo de Quirós JF, Palomo C. Two cases of fatal transfusion-associated bacterial sepsis provoked by Providencia rettgeri. Haematologica 1999; 84:1051-2. [PMID: 10553171] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/14/2023] Open
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Ichetovkin IE, Abramochkin G, Shrader TE. Substrate recognition by the leucyl/phenylalanyl-tRNA-protein transferase. Conservation within the enzyme family and localization to the trypsin-resistant domain. J Biol Chem 1997; 272:33009-14. [PMID: 9407082 DOI: 10.1074/jbc.272.52.33009] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
The leucyl/phenylalanyl-tRNA-protein transferase (L/F-transferase) from Escherichia coli catalyzes a peptidyltransferase reaction that results in the N-terminal aminoacylation of acceptor proteins using Leu-, Phe-, and Met-tRNAs as amino acid donors. We demonstrated that L/F-transferase homologs are widely distributed throughout the eubacteria, supporting our proposal that the enzyme family is ancient and catalyzes early peptide bond synthesis. However, here we present data suggesting that the L/F-transferase is not a homolog of the peptidyltransferase enzymes involved in cell wall peptidoglycan biosynthesis in Gram-positive species, such as Staphylococcus aureus. A sequence comparison of the known L/F-transferase homologs began to identify the essential residues required to catalyze a peptidyltransferase reaction and revealed that <20% of the residues were invariant within the L/F-transferase family. Despite this sequence variation, substrate specificity was broadly conserved, and L/F-transferase homologs from Providencia stuartii, Vibrio cholerae, Neisseria gonorrhoeae, and the cyanobacterium Synechocystis sp. all complemented an E. coli aat mutant (lacking L/F-transferase activity) for the degradation of N-end rule substrates. In vitro comparison of the most divergent L/F-transferase homologs, from E. coli and the cyanobacterium Synechocystis sp., revealed near-complete conservation of both substrate specificity and secondary structure. Finally, we demonstrated that variants of the E. coli L/F-transferase, lacking either 33 or 78 N-terminal residues, retained measurable peptidyltransferase activity and wild type substrate specificity. Overall, our results identified an essential core of an L/F-transferase and revealed that a peptidyltransferase catalyst may be constructed from approximately 120 amino acids.
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Affiliation(s)
- I E Ichetovkin
- Department of Biochemistry, Albert Einstein College of Medicine, Bronx, New York 10461, USA
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King JB, Stickler DJ. The effect of repeated instillations of antiseptics on catheter-associated urinary tract infections: a study in a physical model of the catheterized bladder. Urol Res 1992; 20:403-7. [PMID: 1462478 DOI: 10.1007/bf00294496] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The activity of three antiseptic bladder washout solutions was examined in a physical model of the catheterized bladder. Tests were performed against cultures of four common urinary tract pathogens that had established themselves in the model and colonized the surfaces with biofilm. Double instillations of chlorhexidine (0.02% w/v) at 6-h intervals failed to eliminate Pseudomonas aeruginosa, Proteus mirabilis, and Providencia stuartii from the bladder model. Escherichia coli, however, was susceptible to a second instillation provided that it was performed within 12 h. Supplementing chlorhexidine with EDTA and TRIS potentiated its activity against E. coli. Mandelic acid (1.0% w/v) was the most effective of the agents, double instillations eliminating all but Pr. mirabilis infections.
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Affiliation(s)
- J B King
- School of Pure and Applied Biology, University of Wales, College of Cardiff, UK
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Keren G, Tyrrel DL. Gram-negative septicemia caused by providencia stuartii. Int J Pediatr Nephrol 1987; 8:91-4. [PMID: 3654064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The role of urologic disease and manipulation of the genito-urinary tract in the pathogenesis of gram-negative bacteremia has been long recognized. Among these organisms, species of providencia genus have been increasingly reported. We describe a 17-year-old male paraplegic who developed septic shock due to Providencia Stuartii following urinary tract manipulation and responding to medical therapy. This is unusual as most cases with septic shock from providencia species will succumb. It is important to review this case since providencia species appear to be increasingly common in paraplegic patients.
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Affiliation(s)
- G Keren
- Division of Pediatrics, Chaim Sheba Medical Center, Tel-Hashomer, Israel
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31
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Abstract
Burn patients in an early cohort (n = 173) treated in an intensive care ward without separate enclosures were compared with a later cohort (n = 213) treated in a renovated unit with separate bed enclosures. The number of patients developing infection was significantly reduced in the late group. Observed mortality was compared with mortality predicted on the basis of burn size and age alone. Reduction in observed compared with predicted mortality, inapparent in the early group, was seen in the late group and was restricted to the subgroup of patients with predicted mortality of 25% to 75%, in which the observed mortality of 28.3% was less than the predicted mortality of 48.7%. The incidence of infected patients was reduced from 58.1% in the early cohort to 30.4% in the late cohort. In comparison of the early cohort with the late cohort, the overall proportion of patients with bacteremia was reduced from 20.1% to 9.4%, while the incidences of both pneumonia and burn wound invasion remained unchanged. Providencia and Pseudomonas species, endemic in the early cohort, were eliminated in the late cohort. Reduction of infection by environmental manipulation in burn patients was possible and was associated with improved survival.
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Abstract
Parenteral nutrition therapy can achieve an anabolic state in patients who are unable to maintain normal nitrogen balance; however, it may be associated with infectious complications. Infections may be related to contamination of the cannula and the cannula wound, of the infusate, or of other parts of the parenteral nutrition system. A variety of microorganisms has been associated with these infections. The exact mechanisms that initiate cannula-related infection are poorly understood. Susceptibility of the host, the method and site of cannula insertion, colonization of parenteral nutrition cannulas, use of parenteral nutrition systems for multiple purposes, cannula material, and other factors may all play some role. Controlling infections depend on many factors, including quality control processes to ensure sterility of parenteral nutrition solutions, attention to aseptic technique during cannula insertion, procedures to prevent in-use contamination, proper care of the cannula insertion site, and proper management of other parts of the parenteral nutrition system. In addition, infectious complications appear to be reduced by an organized team that follows infection control protocols. Many facets of parenteral nutrition therapy are based on data from uncontrolled clinical investigations. Well-designed, controlled clinical trials may provide data that will further minimize the risks associated with parenteral nutrition therapy.
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Laor E, Schiffman Z, Reid RE, Tolia BM, Freed SZ. On percutaneous drainage of retroperitoneal collections: when is primary surgical drainage preferable? Urology 1985; 26:114-6. [PMID: 4024400 DOI: 10.1016/0090-4295(85)90041-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Percutaneous drainage of retroperitoneal collections is a method employed with an ever-increasing frequency. The indication for primary surgical drainage of these collections is rapidly decreasing. Herein we describe what we consider to be the indications for primary surgical drainage of retroperitoneal collections illustrated by the recurrence of the abscess in 3 of our patients following adequate primary percutaneous drainage.
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Abstract
This study involved 27 geriatric patients with asymptomatic chronic bacteriuria; all had indwelling Foley catheters. The treatment regimens (daily oral dosage) were: methenamine mandelate (MM) granules, 4 gm; MM, 4 gm, plus ascorbic acid, 4 gm; and MM, 4 gm, plus ascorbic acid, 4 gm, plus cranberry cocktail, 1 liter--administered according to a cross-over design. Proteus vulgaris, Pseudomonas aeruginosa and E. coli were the most common urinary organisms. Proteus organisms were more often found in alkaline than in acidic urines, but the type of pathogen had no influence on urinary pH. Urinary formaldehyde concentration [HCHO] was lower in patients with Proteus infection (17.7 micrograms/ml) than in those with Pseudomonas (21.9 micrograms/ml) or E. coli infection (21.8 micrograms/ml). However, for Proteus infection, [HCHO] was higher in patients receiving MM plus ascorbic acid than in those receiving MM alone. Addition of cranberry cocktail to ascorbic acid did not enhance urinary pH, [HCHO] or methenamine efficacy. Our data suggest that in Foley catheter patients with chronic asymptomatic bacteriuria secondary to Proteus, Pseudomonas or E. coli infection, the type of urinary pathogen or the urinary pH cannot be used to predict the efficacy of methenamine therapy either with or without urinary acidifying agents.
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Sapico FL, Lindquist LB, Montgomerie JZ, Jimenez EM, Morrow JW. Short-course aminoglycoside therapy in patients with spinal cord injury. Standard dose versus low dose. Urology 1980; 15:457-60. [PMID: 6763394 DOI: 10.1016/0090-4295(80)90004-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Twenty-nine patients with spinal cord injury and asymptomatic urinary tract infection were treated with standard or reduced doses of tobramycin and amikacin. The patients received five days of intramuscular antibiotics. Most of the patients in the tobramycin groups had Pseudomonas aeruginosa infection and most of those in the amikacin group had either Proteus rettgeri or Providencia stuartii infections. Only 1 patient had a positive urine antibody coating test. High antibiotic concentrations were demonstrated in the urine of all patients during therapy. Urine cultures were obtained two and seven days after completion of therapy. Forty-eight per cent of the patients were cured, while 31 per cent showed persistence or relapse, and 21 per cent had reinfection with other bacteria. No significant differences in results were observed between the standard-dose and low-dose regimens and between the amikacin and tobramycin groups. The low success rate of the regimens used may indicate the need to evaluate alternative therapeutic regimens to treat urinary tract infections in this special group of patients.
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Abstract
48% of all isolates of Providencia stuartii obtained within a period of one year, originated from the urine of catheterised patients, whereas another 37% were found in the respiratory tract of patients with intubation. The incidence of Providenica stuartii correlated with the period during which iatrogenic measures had been applied, as well as with a preceding course with antibiotics.
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Whiteley GR, Penner JL, Stewart IO, Stokan PC, Hinton NA. Nosocomial urinary tract infections caused by two O-serotypes of Providencia stuartii in one hospital. J Clin Microbiol 1977; 6:551-4. [PMID: 591628 PMCID: PMC274822 DOI: 10.1128/jcm.6.6.551-554.1977] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Providencia stuartii nosocomial urinary tract infections occurring in the same hospital over an 18-month period of retrospective study were shown, by serotyping and biotyping, to have been caused by two endemic strains. Two episodes, involving 38 patients in one ward and 11 patients in another, were caused by a mannitol-positive strain of serotype O55. Transmission of the strain through the movements of one patient appeared to have been the basis for the introduction of the agent from one ward to the other. In another episode, involving two patients in a third ward, the infections were caused by a mannitol-negative strain of serotype O49. The study demonstrated the usefulness of serotyping and biotyping in epidemiological studies of infections caused by P. stuartii.
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Marrie TJ, Gurwith MJ, Ronald AR, Stiver HG, Lank B, Fox L. Clinical and laboratory study of tobramycin in the treatment of infections due to gram-negative organisms. Can Med Assoc J 1977; 117:138-43. [PMID: 406032 PMCID: PMC1879715] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Tobramycin, an aminoglycoside antibiotic, was used to treat 52 infections due to gram-negative organisms in 51 patients. Complicated urinary tract infections, bacteremia and pyelonephritis accounted for 80% of the infections. The rate of immediate satisfactory response was 79%. During therapy with tobramycin, resistant organisms emerged in four patients--two Pseudomonas aeruginosa and two Escherichia coli strains. There were four superinfections with tobramycin-resistant Providencia sp. In four seriously ill patients the serum creatinine concentration increased 1 mg/dL or more; in three the increase was transient. No auditory toxicity was noted in the 19 patients in whom serial audiograms were made. In vitro testing of isolates from these patients showed that tobramycin and gentamicin had equal activity against Enterobacteriaceae. Tobramycin was two to four times more active against susceptible P. aeruginosa.
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40
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Panova IM, Grishina IA. [Gram-negative infections in severe thermal injury]. Vestn Khir Im I I Grek 1976; 11:66-9. [PMID: 823688] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Among 78 patients with persistant bacteriemia the latter was induced by staphylococci in 59 and by gram-negative microflora in 19 patients. In 14 of 19 patients gram-negative septicemia was preceded by staphylococcic one. Gram-negative septicemia would condition in patients the development of pyemic foci not only in the wound area but also in some portions of the body and in internal organs as well. Among 19 patients with gram-negative septicemia 12 patients died, while among 59 patients with staphylococcic septicemia there were 18 deaths.
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Nakamura M, Horiuchi S, Nakaya R. Comparative studies on generalized transducing bacteriophages of Proteus mirabilis, phim and pi1. Jpn J Microbiol 1975; 19:123-31. [PMID: 1097767 DOI: 10.1111/j.1348-0421.1975.tb00858.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Comparative studies were made on the generalized transducing bacteriophages of Proteus mirabilis phim (Nakaya and Rownd), pi1(Böhme), and a clear plaque-forming mutant phim-c, derived from phim. Electron microscopic observations revealed that these phages were morphologically identical, indicating that they belonged to the group C of Bradley's classification, or to the type C1 of Ackermann's classification. Phages phim and pi1 formed characteristic turbid plaques different from each other, and the plaques of pi1 were smaller in size than those of phim. The plaques of phage phim-c were clear and also were the largest in size among those studied. Average latent periods of phim and pi1 were 70 and 60 min, respectively. Average burst size was found to be 30 and 10 plaque-forming units per infected cell for phim and pi1, respectively. It was confirmed by cross neutralization tests that phim and pi1 differed serologically from each other. The host range of the two phages also differed, and phage phim was more sensitive to heat than pi1. These results indicate that phages phim and pi1 are different types of phages. Majority of the properties of phage phim-c were nearly identical with those of phage phim except that the multiplication of phim-c was more strongly inhibited by methylene blue than that of phim and pi1. Phage phim-c is considered to be a clear mutant of phim.
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42
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Lüthy R. [Aminoglycoside antibiotics from clinical viewpoint]. Int J Clin Pharmacol Biopharm 1975; 11:112-25. [PMID: 1095500] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Indications, side effects, dosage and several pharmacokinetic properties of gentamicin, tobramycin, sisomicin, kanamycin, amikacin, and streptomycin are delt with in the first part. Hereafter, some aspects are briefly mentioned concerning combinations of antibiotics with aminoglycosides, as well as indications for the evaluation and analysis of the aminoglycoside concentration in the serum.
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SERENY B. BREAKDOWN OF AMINO ACIDS BY ENTEROBACTERIACEAE. 3. CHARACTERISTIC COLOUR REACTIONS IN THE PROTEUS- PROVIDENCIA GROUP. Acta Microbiol Acad Sci Hung 1964; 11:237-49. [PMID: 14267554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/26/2023]
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CHAKRABARTY AN, GUPTA NP, GUPTA SP, GOVIL KK. OBSERVATIONS ON RETTGERELLA AND PROVIDENCIA ISOLATED FROM CASES OF ACUTE GASTROENTERITIS IN UTTAR PRADESH. Indian J Med Res 1963; 51:831-8. [PMID: 14065204] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/25/2023] Open
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VIEU JF. [Distribution of lysogeny among Proteus and Providencia]. C R Hebd Seances Acad Sci 1963; 256:4317-9. [PMID: 13997139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/25/2023]
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46
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SEFCOVICOVA L. [Incidence of Providencia strains in infants]. Cesk Epidemiol Mikrobiol Imunol 1958; 7:197-201. [PMID: 13573445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/23/2023]
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48
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NAMIOKA S, SAKAZAKI R. [Study on Rettgerella]. Ann Inst Pasteur (Paris) 1958; 94:485-99. [PMID: 13534038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 03/07/2023]
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49
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MOTTL J. [Decomposition of indole by strains of the Providencia group]. Cesk Epidemiol Mikrobiol Imunol 1957; 6:60-3. [PMID: 13413938] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
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50
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BYDZOVSKY V, DUDEK J. [Distribution of Providencia]. Cesk Epidemiol Mikrobiol Imunol 1956; 5:101-2. [PMID: 13364984] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
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