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de Oliveira Santos IC, da Conceiçāo Neto OC, da Costa BS, Teixeira CBT, da Silva Pontes L, Silveira MC, Rocha-de-Souza CM, Carvalho-Assef APD. Evaluation of phenotypic detection of carbapenemase-producing Pseudomonas spp. from clinical isolates. Braz J Microbiol 2023; 54:135-141. [PMID: 36327041 PMCID: PMC9943810 DOI: 10.1007/s42770-022-00857-4] [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: 03/02/2022] [Accepted: 10/12/2022] [Indexed: 11/05/2022] Open
Abstract
Carbapenems are considered last-resort antibiotics for the treatment of infections caused by multidrug-resistant Gram-negative bacteria. Although the main mechanism of carbapenem-resistance in Pseudomonas aeruginosa is the loss of OprD porin, carbapenemases continue to be a problem worldwide. The aim of this study was to evaluate the performance of phenotypic tests (Carba NP, Blue Carba, and mCIM/eCIM) for detection of carbapenemase-producing Pseudomonas spp. in Brazil. One hundred twenty-seven Pseudomonas spp. clinical isolates from different Brazilian states were submitted to phenotypic and molecular carbapenemase detection. A total of 90 carbapenemase-producing P. aeruginosa and 5 Pseudomonas putida (35, blaVIM-2; 17, blaSPM-1; 2, blaIMP-10; 1, blaVIM-24; 1, blaNDM-1; 39, blaKPC-2). The phenotypic Carba NP, Blue Carba, and mCIM/eCIM showed sensitivity of 94.7%, 93.6%, and 93.6%, and specificity of 90.6%, 100%, and 96.8%, respectively. However, only the Carba NP presented the highest sensitivity and showed the ability in differentiating the carbapenemases between class A and class B using EDTA. Blue Carba failed to detect most of the class B carbapenemases, having the worst performance using EDTA. Our results show changes in the epidemiology of the spread of carbapenemases and the importance of their detection by phenotypic and genotypic tests. Such, it is essential to use analytical tools that faithfully detect bacterial resistance in vitro in a simple, sensitive, rapid, and cost-effective way. Much effort must be done to improve the current tests and for the development of new ones.
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Affiliation(s)
- Ivson Cassiano de Oliveira Santos
- Laboratório de Pesquisa Em Infecção Hospitalar (LAPIH), Instituto Oswaldo Cruz - FIOCRUZ, Fundação Oswaldo Cruz, Av. Brasil, 4365, Rio de Janeiro, RJ, 21045900, Brazil
| | - Orlando Carlos da Conceiçāo Neto
- Laboratório de Pesquisa Em Infecção Hospitalar (LAPIH), Instituto Oswaldo Cruz - FIOCRUZ, Fundação Oswaldo Cruz, Av. Brasil, 4365, Rio de Janeiro, RJ, 21045900, Brazil
| | - Bianca Santos da Costa
- Laboratório de Pesquisa Em Infecção Hospitalar (LAPIH), Instituto Oswaldo Cruz - FIOCRUZ, Fundação Oswaldo Cruz, Av. Brasil, 4365, Rio de Janeiro, RJ, 21045900, Brazil
| | - Camila Bastos Tavares Teixeira
- Laboratório de Pesquisa Em Infecção Hospitalar (LAPIH), Instituto Oswaldo Cruz - FIOCRUZ, Fundação Oswaldo Cruz, Av. Brasil, 4365, Rio de Janeiro, RJ, 21045900, Brazil
| | - Leilane da Silva Pontes
- Laboratório de Pesquisa Em Infecção Hospitalar (LAPIH), Instituto Oswaldo Cruz - FIOCRUZ, Fundação Oswaldo Cruz, Av. Brasil, 4365, Rio de Janeiro, RJ, 21045900, Brazil
| | - Melise Chaves Silveira
- Laboratório de Pesquisa Em Infecção Hospitalar (LAPIH), Instituto Oswaldo Cruz - FIOCRUZ, Fundação Oswaldo Cruz, Av. Brasil, 4365, Rio de Janeiro, RJ, 21045900, Brazil
| | - Cláudio Marcos Rocha-de-Souza
- Laboratório de Pesquisa Em Infecção Hospitalar (LAPIH), Instituto Oswaldo Cruz - FIOCRUZ, Fundação Oswaldo Cruz, Av. Brasil, 4365, Rio de Janeiro, RJ, 21045900, Brazil
| | - Ana Paula D'Alincourt Carvalho-Assef
- Laboratório de Pesquisa Em Infecção Hospitalar (LAPIH), Instituto Oswaldo Cruz - FIOCRUZ, Fundação Oswaldo Cruz, Av. Brasil, 4365, Rio de Janeiro, RJ, 21045900, Brazil.
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Chouhan S, Mulani R, Ansari H, Sindhav G, Rao P, Rawal RM, Saraf M, Goswami D. Rapid method for detection, quantification and measuring microbial degradation of pesticide-thiram using high performance thin layer chromatography (HPTLC). Environ Sci Pollut Res Int 2023; 30:7874-7885. [PMID: 36048383 DOI: 10.1007/s11356-022-22731-4] [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: 07/07/2022] [Accepted: 08/22/2022] [Indexed: 06/15/2023]
Abstract
Thiram (tetramethylthiuramdisulfide) or thiram sulphide is a dithiocarbamate group of non-systemic group of fungicide which are applied for seed treatment, control of the crop pests, to repel animals, etc. Moreover, thiram has also been responsible to cause moderate skin sensitivity and eye irritation. Higher exposure to thiram might also lead to developmental damages to newborn and neurotoxic effects to non-target organisms. Advancing to prevent such toxic effects and prevention of soil fertility from thiram and thiram-like chemicals is indispensable. The analytical High-Performance Thin-Layer Chromatography (HPTLC) is a simple, quick and a reliable method was proposed and validated for the detection and quantification of various small molecules for many years. This manuscript represents the solution to use microbes to degrade the thiram present in the soil and for that, HPTLC based method to study thiram degradation by Pseudomonas has been designed. Herein, a HPTLC protocol formalised to reveal the detection and quantification of thiram within the range of 100 to 700 ng/spot on TLC plate. The same concentration was then used for calculating percent microbial degradation of thiram from the culture broth. To perform the microbial degradation of thiram, Pseudomonas otitidis strain TD-8 and Pseudomonas stutzeri strain TD-18 were taken as thiram degrader microbial strain. The efficacy of TD-8 to degrade thiram was identified to be 81 and 99% when grown in presence of thiram for 4 days and 8 days, respectively, while TD-18 strain's efficacy to degrade thiram was found to be 57% and 99% when grown in presence of thiram for 4 days and 8 days, respectively.
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Affiliation(s)
- Sonalkunwar Chouhan
- Department of Microbiology & Biotechnology, University School of Sciences, Gujarat University, Ahmedabad, 380009, Gujarat, India
| | - Rinkal Mulani
- Department of Microbiology & Biotechnology, University School of Sciences, Gujarat University, Ahmedabad, 380009, Gujarat, India
| | - Hafsa Ansari
- Department of Zoology and Biomedical Technology, University School of Sciences, Gujarat University, Ahmedabad, 380009, Gujarat, India
| | - Gaurang Sindhav
- Department of Zoology and Biomedical Technology, University School of Sciences, Gujarat University, Ahmedabad, 380009, Gujarat, India
| | - Priyashi Rao
- Department of Biochemistry & Forensic Science, University School of Sciences, Gujarat University, Ahmedabad, Gujarat, India
| | - Rakesh M Rawal
- Department of Biochemistry & Forensic Science, University School of Sciences, Gujarat University, Ahmedabad, Gujarat, India
| | - Meenu Saraf
- Department of Microbiology & Biotechnology, University School of Sciences, Gujarat University, Ahmedabad, 380009, Gujarat, India
| | - Dweipayan Goswami
- Department of Microbiology & Biotechnology, University School of Sciences, Gujarat University, Ahmedabad, 380009, Gujarat, India.
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Yang H, Luo X, Zhu L, Liang R, Mao Y, Yang X, Niu L, Zhang Y, Dong P. The biological effect of a beef-derived Latilactobacillus sakei on beef steaks during chilled storage. Food Sci Nutr 2022; 11:1059-1072. [PMID: 36789062 PMCID: PMC9922142 DOI: 10.1002/fsn3.3143] [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] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Revised: 10/26/2022] [Accepted: 11/04/2022] [Indexed: 11/16/2022] Open
Abstract
The aim of this study was to investigate the biological inhibiting effect of a beef-derived Latilactobacillus sakei (RS-25) on the spoilage of beef steaks in overwrapped packaging during the 12 days of storage at 4°C. Beef quality as well as microbial indicators were determined at different intervals during the storage after the inoculation of RS-25 at the 6 log CFU/g, and the high-throughput sequencing was applied to investigate the changes of microbial community structure during the storage. The inoculation of RS-25 on beef had no effect (p > .05) on pH, TBARS, and TVB-N during storage indicating the weak effect of such strain on the eat quality. Furthermore, the rise of L* and the delayed decline of a* and b* reveal the protection effect of RS-25 on the meat color. RS-25 reduced the re-contaminated Salmonella typhimurium by 1.16 log CFU/g (p < .01), and the growth of Brochothrix thermosphacta was also inhibited but no inhibition was found on the Pseudomonas spp. at the first 6 days of storage. The inhibiting effect of RS-25 was covered by the rapid growth of other microorganism during the following 6 days of storage. Consistent with the microbial counts results, high-throughput sequencing analysis confirmed that the inoculated L. sakei RS-25 was dominant at first 6 days, and then replaced by Pseudomonas spp. The findings obtained from the current study may provide basic information for the further application of bioprotective bacteria in preservation of beef steaks in the overwrapped packaging.
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Affiliation(s)
- Huixuan Yang
- Lab of Beef Processing and Quality Control, College of Food Science and EngineeringShandong Agricultural UniversityTai'anChina,National R&D Center for Beef Processing TechnologyTai'anChina
| | - Xin Luo
- Lab of Beef Processing and Quality Control, College of Food Science and EngineeringShandong Agricultural UniversityTai'anChina,National R&D Center for Beef Processing TechnologyTai'anChina
| | - Lixian Zhu
- Lab of Beef Processing and Quality Control, College of Food Science and EngineeringShandong Agricultural UniversityTai'anChina,National R&D Center for Beef Processing TechnologyTai'anChina
| | - Rongrong Liang
- Lab of Beef Processing and Quality Control, College of Food Science and EngineeringShandong Agricultural UniversityTai'anChina,National R&D Center for Beef Processing TechnologyTai'anChina
| | - Yanwei Mao
- Lab of Beef Processing and Quality Control, College of Food Science and EngineeringShandong Agricultural UniversityTai'anChina,National R&D Center for Beef Processing TechnologyTai'anChina
| | - Xiaoyin Yang
- Lab of Beef Processing and Quality Control, College of Food Science and EngineeringShandong Agricultural UniversityTai'anChina,National R&D Center for Beef Processing TechnologyTai'anChina
| | - Lebao Niu
- Lab of Beef Processing and Quality Control, College of Food Science and EngineeringShandong Agricultural UniversityTai'anChina,National R&D Center for Beef Processing TechnologyTai'anChina
| | - Yimin Zhang
- Lab of Beef Processing and Quality Control, College of Food Science and EngineeringShandong Agricultural UniversityTai'anChina,National R&D Center for Beef Processing TechnologyTai'anChina
| | - Pengcheng Dong
- Lab of Beef Processing and Quality Control, College of Food Science and EngineeringShandong Agricultural UniversityTai'anChina,National R&D Center for Beef Processing TechnologyTai'anChina
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López-Hernández J, García-Cárdenas E, López-Bucio JS, Jiménez-Vázquez KR, de la Cruz HR, Ferrera-Rodríguez O, Santos-Rodríguez DL, Ortiz-Castro R, López-Bucio J. Screening of Phosphate Solubilization Identifies Six Pseudomonas Species with Contrasting Phytostimulation Properties in Arabidopsis Seedlings. Microb Ecol 2022:10.1007/s00248-022-02080-y. [PMID: 35867140 DOI: 10.1007/s00248-022-02080-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Accepted: 07/15/2022] [Indexed: 06/15/2023]
Abstract
The interaction of plants with bacteria and the long-term success of their adaptation to challenging environments depend upon critical traits that include nutrient solubilization, remodeling of root architecture, and modulation of host hormonal status. To examine whether bacterial promotion of phosphate solubilization, root branching and the host auxin response may account for plant growth, we isolated and characterized ten bacterial strains based on their high capability to solubilize calcium phosphate. All strains could be grouped into six Pseudomonas species, namely P. brassicae, P. baetica, P. laurylsulfatiphila, P. chlororaphis, P. lurida, and P. extremorientalis via 16S rRNA molecular analyses. A Solibacillus isronensis strain was also identified, which remained neutral when interacting with Arabidopsis roots, and thus could be used as inoculation control. The interaction of Arabidopsis seedlings with bacterial streaks from pure cultures in vitro indicated that their phytostimulation properties largely differ, since P. brassicae and P. laurylsulfatiphila strongly increased shoot and root biomass, whereas the other species did not. Most bacterial isolates, except P. chlororaphis promoted lateral root formation, and P. lurida and P. chlororaphis strongly enhanced expression of the auxin-inducible gene construct DR5:GUS in roots, but the most bioactive probiotic bacterium P. brassicae could not enhance the auxin response. Inoculation with P. brassicae and P. lurida improved shoot and root growth in medium supplemented with calcium phosphate as the sole Pi source. Collectively, our data indicate the differential responses of Arabidopsis seedlings to inoculation with several Pseudomonas species and highlight the potential of P. brassicae to manage phosphate nutrition and plant growth in a more eco-friendly manner.
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Affiliation(s)
- José López-Hernández
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edificio B3, Ciudad Universitaria, C. P. 58030, Morelia, Michoacán, México
| | - Elizabeth García-Cárdenas
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edificio B3, Ciudad Universitaria, C. P. 58030, Morelia, Michoacán, México
| | - Jesús Salvador López-Bucio
- Catedrático CONACYT-Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edificio B3, Ciudad Universitaria, C. P. 58030, Morelia, Michoacán, México
| | - Kirán Rubí Jiménez-Vázquez
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edificio B3, Ciudad Universitaria, C. P. 58030, Morelia, Michoacán, México
| | - Homero Reyes de la Cruz
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edificio B3, Ciudad Universitaria, C. P. 58030, Morelia, Michoacán, México
| | - Ofelia Ferrera-Rodríguez
- Instituto de Ecología, Red de Estudios Moleculares Avanzados, Clúster BioMimic®, Carretera Antigua a Coatepec 351, El Haya, A.C, 91073, Veracruz, México
| | - Dulce Lizbeth Santos-Rodríguez
- Instituto de Ecología, Red de Estudios Moleculares Avanzados, Clúster BioMimic®, Carretera Antigua a Coatepec 351, El Haya, A.C, 91073, Veracruz, México
| | - Randy Ortiz-Castro
- Catedrático CONACYT-Instituto de Ecología, Red de Estudios Moleculares Avanzados, Clúster BioMimic®, Carretera Antigua a Coatepec 351, El Haya, A.C, 91073, Veracruz, México
| | - José López-Bucio
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edificio B3, Ciudad Universitaria, C. P. 58030, Morelia, Michoacán, México.
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Panebianco F, Rubiola S, Chiesa F, Civera T, Di Ciccio PA. Effect of gaseous ozone treatment on biofilm of dairy-isolated Pseudomonas spp. strains. Ital J Food Saf 2022; 11:10350. [PMID: 35832038 PMCID: PMC9272081 DOI: 10.4081/ijfs.2022.10350] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Accepted: 02/21/2022] [Indexed: 12/14/2022] Open
Abstract
Microbial biofilms existing in food industries have been implicated as important contamination sources of spoilage and pathogenic microorganisms in the finished products. Among the innovative strategies proposed to contrast biofilms in food environments, ozone is recognised as an environmentally friendly technology but there are few studies about its effect against bacterial biofilms. The objective of this study was to evaluate the effect of gaseous ozone (50 ppm for 6 h) in inhibition and eradication of biofilm formed by twenty-one dairyisolated Pseudomonas spp. strains. Before ozone treatments, all isolates were screened for biofilm formation according to a previously described method. Strains were then divided in four groups: weak, weak/moderate, moderate/strong, and strong biofilm producers based on the biofilm biomass value of each isolate determined using the optical density (OD - 595 nm). Inhibition treatment was effective on the strain (C1) belonging to the weak producers' group, on all strains classified as weak/moderate producers, on two strains (C8 and C12) belonging to the group of moderate/strong producers and on one strain (C13) classified as strong producer. Conversely, eradication treatments were ineffective on all strains tested, except for the strain C4 which reduced its biofilm-forming abilities after exposure to ozone gas. In conclusion, gaseous ozone may be used to enhance existing sanitation protocols in food processing environments, but its application alone not seems sufficient to contrast Pseudomonas spp. established biofilms.
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Affiliation(s)
| | - Selene Rubiola
- Department of Veterinary Sciences, University of Turin, Italy
| | | | - Tiziana Civera
- Department of Veterinary Sciences, University of Turin, Italy
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Abstract
In this study, we explored the possibility of utilizing the succulent pulp of Spondias mombin (SM) as feedstock for the synthesis of biosurfactants by Pseudomonas spp. The cultures were composed of basic mineral medium amended with SM, SM + glucose, glucose (GLC), and nutrient broth (NB) as carbon sources. Biosurfactant production was determined by surface-active properties such as hemolysis, emulsification index (E24), drop collapse, oil-spreading assays, and reduction of surface tension. The stability of the biosurfactants was monitored across different temperature and pH regimes while chemical components of the extracted biosurfactants were determined by thin-layer chromatography. Biosurfactants synthesized from SM as sole substrate showed the highest emulsification index (56.35%), oil-spreading capacity (4.4 ± 1.31 cm), hemolysis (3.10 ± 0.02 cm), the shortest time for drop collapse (30 s), and surface tension reduction (24 mN/m). Biosurfactant concentrations ranged from 0.07 ± 0.01 in the NB to 2.08 ± 0.01 g/L in the media amended with SM. Chemical characterization revealed significant concentrations of carbohydrates and lipids in the biosurfactant produced from SM (1.2 ± 0.17 and 0.88 ± 0.04 g/L, respectively) when compared to SM + glucose (0.92 ± 0.05, and 0.62 ± 0.02 g/L, respectively), glucose (0.35 ± 0.04 and 0.13 ± 0.02 g/L, respectively), and nutrient broth (0.06 ± 0.03 and 0.01 ± 0.01 g/L, respectively). The biosurfactants were stable over a wide range of temperature while E24 increased with pH. Our results show the viability of SM fruit pulp as low-cost feedstock for industrial-scale production of biosurfactants using Pseudomonas spp.
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Affiliation(s)
- Kenneth Ejike Ogbonna
- Department of Science Laboratory Technology, Faculty of Physical Sciences, University of Nigeria , Nsukka, Nigeria.,Department of Biochemistry, Faculty of Biological Sciences, University of Nigeria , Nsukka, Nigeria
| | | | - Christopher Chukwudi Okonkwo
- Department of Animal Sciences, The Ohio State University, and Ohio State Agricultural Research and Development Center (OARDC) , Wooster, OH, USA
| | - Kingsley Tochukwu Ughamba
- Department of Science Laboratory Technology, Faculty of Physical Sciences, University of Nigeria , Nsukka, Nigeria.,Department of Microbiology, Faculty of Biological Sciences, University of Nigeria , Nsukka, Nigeria
| | - Joseph Akor
- Department of Science Laboratory Technology, Faculty of Physical Sciences, University of Nigeria , Nsukka, Nigeria.,Department of Biochemistry, Faculty of Biological Sciences, University of Nigeria , Nsukka, Nigeria
| | - Obioma U Njoku
- Department of Biochemistry, Faculty of Biological Sciences, University of Nigeria , Nsukka, Nigeria
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Zain M, Yasmin S, Hafeez FY. Isolation and Characterization of Plant Growth Promoting Antagonistic Bacteria from Cotton and Sugarcane Plants for Suppression of Phytopathogenic Fusarium Species. Iran J Biotechnol 2019; 17:e1974. [PMID: 31457052 PMCID: PMC6697841 DOI: 10.21859/ijb.1974] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Background Plant Growth Promoting Rhizobacteria (PGPR) may be utilized to augment plant growth and suppress the plant pathogens. Objective: The present study was conducted to isolate and characterize the antagonistic bacteria indigenous to cotton and sugarcane rhizosphere in Pakistan, and to evaluate their ability to suppress phytopathogenic Fusarium spp. Out of 63 isolates 37 different morphotypes were studied for their antagonistic activity against Fusarium monoliformae, Fusarium oxysporum and Fusarium solani. Among these 31 strains showed the percentage suppression ranging from 40 to 66% against Fusarium spp. Objectives The antagonistic bacteria having antifungal activity were studied for different morphological and physiological characteristics using Gram staining and light microscopy. Most of them were Gram negative and tentatively identified as Pseudomonas spp. The selected strains were screened in vitro for plant growth regulation and antifungal traits. Material and Methods Our study included 1000 premature CAD patients that classified into two groups with history of MI (n = 461) and without of MI (n = 539). The polymorphism variants in 10% of samples were determined by PCR-RFLP technique and genotyping of the polymorphism in all subjects was conducted by High Resolution Melting method. Given the two conditions of patients residing in Tehran and also faced with their first episode of MI, 640 out of 1000 study samples that had been previously followed-up were assessed in a retrospective cohort phase regarding long-term major adverse cardiac events (MACE). Results Four bacterial strains were able to produce the chitinase enzyme while four other bacterial strains showed protease production. Ten strains were positive for HCN production. Out of 37, eight strains showed phosphate solubilization ranging from 13 to 24 µg/ml. eighteen strains produced indole acetic acid ranging from 5 to 19 µg/ml. Conclusions This study identified specific traits in the isolated rhizobacteria which make them good candidates as PGPR and might contribute to enhance growth of crop plants. This information is of general interest and also helpful for devising strategies to manage diseases caused by Fusarium in cotton and sugarcane.
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Affiliation(s)
- Maryam Zain
- Department of Biochemistry and Biotechnology, The Women University, Multan, Pakistan.,National Institute for Biotechnology and Genetic Engineering (NIBGE), Faisalabad, Pakistan
| | - Sumera Yasmin
- National Institute for Biotechnology and Genetic Engineering (NIBGE), Faisalabad, Pakistan
| | - Fouzia Yousaf Hafeez
- National Institute for Biotechnology and Genetic Engineering (NIBGE), Faisalabad, Pakistan.,Department of Biosciences, COMSAT Institute of Biotechnology, Islamabad, Pakistan
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Jin X, Wang J, Li D, Wu F, Zhou X. Rotations with Indian Mustard and Wild Rocket Suppressed Cucumber Fusarium Wilt Disease and Changed Rhizosphere Bacterial Communities. Microorganisms 2019; 7:E57. [PMID: 30795626 DOI: 10.3390/microorganisms7020057] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2019] [Revised: 02/20/2019] [Accepted: 02/20/2019] [Indexed: 02/06/2023] Open
Abstract
Crop monocropping usually results in an enrichment of soil-borne pathogens in soil. Crop rotation is an environmentally friendly method for controlling soil-borne diseases. Plant rhizosphere microorganisms, especially plant-beneficial microorganisms, play a major role in protecting plants from pathogens, but responses of these microorganisms to crop rotation remain unclear. Here, we evaluated the effects of rotations with Indian mustard (Brassica juncea) and wild rocket (Diplotaxis tenuifolia (L.) DC.) on cucumber Fusarium wilt disease caused by Fusarium oxysporum f.sp. cucumerinum (FOC). Cucumber rhizosphere bacterial community composition was analyzed by high-throughput amplicon sequencing. Bacteria, Pseudomonas spp., 2,4-diacetylphloroglucinol (an antifungal secondary metabolite) producer and FOC abundances were estimated by real-time PCR. Rotations with Indian mustard and wild rocket suppressed cucumber Fusarium wilt disease and cucumber rhizosphere FOC abundance. Crop rotations increased cucumber rhizosphere bacteria, Pseudomonas spp. and 2,4-diacetylphloroglucinol producer abundances. Moreover, crop rotations changed cucumber rhizosphere bacterial community composition and increased bacterial community diversity. However, crop rotations decreased soil inorganic nitrogen content and inhibited cucumber seedling growth. Overall, rotations with Indian mustard and wild rocket suppressed cucumber Fusarium wilt disease, which might be linked to the increased rhizosphere bacterial diversity and abundances of potential plant-beneficial microorganisms (such as Pseudomonas spp. and 2,4-diacetylphloroglucinol producer).
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Amorese V, Donadu M, Usai D, Sanna A, Milia F, Pisanu F, Molicotti P, Zanetti S, Doria C. In vitro activity of essential oils against Pseudomonas aeruginosa isolated from infected hip implants. J Infect Dev Ctries 2018; 12:996-1001. [PMID: 32012130 DOI: 10.3855/jidc.10988] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Accepted: 10/31/2018] [Indexed: 10/31/2022] Open
Abstract
INTRODUCTION Essential oils have been used since ancient times and are known for their anti-inflammatory, anti-depressive, antiseptic, antifungal and antimicrobial properties. METHODOLOGY in this study the antimicrobial activity of two essential oils from Melaleuca alternifolia and Thymus vulgaris-red thyme geraniol was tested against 16 multidrug-resistant P. aeruginosa strains from infected hip implants as well as the "in vitro" cytotoxic activity on normal human Wong-Kilbourne derivative (WKD) cells. RESULTS Thymus vulgaris-red thyme geraniol showed lower antimicrobial activity when compared to Melaleuca alternifolia. All tested oils were cytotoxic at concentrations lower than 0.12%. CONCLUSION Increase in drug resistance and lack of new antibiotics may encourage the development of natural treatments together with higher concern on environmental issues and natural lifestyle.
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Datta P, Gupta M, Kumar MB, Gupta V, Chander J. Burkholderia Cepacia Complex Causing Pneumonia in an Immunocompetent Non-Cystic Fibrosis Patient: Case Report and Review of Literature. Infect Disord Drug Targets 2018; 20:106-110. [PMID: 30345929 DOI: 10.2174/1871526518666181022112857] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2018] [Revised: 10/10/2018] [Accepted: 10/12/2018] [Indexed: 11/22/2022]
Abstract
BACKGROUND Burkholderia cepacia complex is widespread in the environment and has been recognized as a cause of opportunistic pulmonary infections, particularly in patients with Cystic Fibrosis (CF). The natural ecology of the bacteria as part of plant growth-promoting rhizosphere provides stark contrast to its infectious potential. Its preponderance as a nosocomial pathogen may be due to its ability to survive in antiseptic solutions, contaminate equipments and intrinsic antimicrobial resistance. CASE An elderly, diabetic male was evaluated for hemoptysis, fever and cough. Chest computed tomography showed a thick walled cavity in the left lung and hilar lymphadenopathy. Sputum examination showed Gram negative bacilli and no acid fast bacilli. Sputum culture yielded growth of non-fermentative Gram negative bacilli on two occasions, but blood culture was sterile. The isolate was identified as B. cepacia by Matrix Assisted Laser Desorption Ionization-Time of Flight Mass Spectrometry (MALDI-TOF MS). The patient's general condition remained poor and in spite of initiation of antibiotics, the patient expired after an episode of massive hemoptysis. CONCLUSION This report raises concerns regarding the spread and severity of B. cepacia infection in non-compromised patients in the community and the need to suspect and identify it. Since the organism is inherently resistant to antipseudomonal penicillins, aminoglycosides and polymyxin B, differentiation from Pseudomonas spp. and determining antimicrobial susceptibility is paramount for treatment.
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Affiliation(s)
- Priya Datta
- Department of Microbiology, Government Medical College and Hospital, Sector-32, Chandigarh 160030, India
| | - Menal Gupta
- Department of Microbiology, Government Medical College and Hospital, Sector-32, Chandigarh 160030, India
| | - Mani B Kumar
- Department of Microbiology, Government Medical College and Hospital, Sector-32, Chandigarh 160030, India
| | - Varsha Gupta
- Department of Microbiology, Government Medical College and Hospital, Sector-32, Chandigarh 160030, India
| | - Jagdish Chander
- Department of Microbiology, Government Medical College and Hospital, Sector-32, Chandigarh 160030, India
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Yusuf AL, Adeyemi KD, Roselina K, Alimon AR, Goh YM, Samsudin AA, Sazili AQ. Dietary supplementation of different parts of Andrographis paniculata affects the fatty acids, lipid oxidation, microbiota, and quality attributes of longissimus muscle in goats. Food Res Int 2018; 111:699-707. [PMID: 30007735 DOI: 10.1016/j.foodres.2018.06.015] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Revised: 05/30/2018] [Accepted: 06/03/2018] [Indexed: 12/31/2022]
Abstract
The effects of dietary supplementation of different parts of Andrographis paniculata on fatty acids, lipid oxidation, microbiota and quality attributes of Longissimus thoracis et lumborum (LTL) muscle in goats were assessed. Twenty four, entire Boer bucks (4 months old; 20.18 ± 0.19 kg BW) were randomly allotted to either a basal diet without additive (AP0), a basal diet + 1.5% Andrographis paniculata leaves (APL) or a basal diet + 1.5% Andrographis paniculata whole plant (APW). The bucks were fed the diets for 100 d and slaughtered. The LTL muscle was subjected to a 7 d chill storage. The AP0 meat had higher (p < .05) concentration of C16:0 and C18:0 than the APW and APL meat. The concentrations of total C18:1trans, total CLA, C18:1n-9, C18:2n-6, C18:3n-3 and C20:5n-3 were higher (p < .05) in APL and APW meat than the AP0 meat. Diets had no effect (p > .05) on muscle glycogen, pH, drip loss, chemical composition and lactic acid bacteria count. Cooking loss, shear force, and TBARS values were lower (p < .05) in APL (23.98%, 0.76 kg, 0.12 mg MDA/kg) and APW (24.53%, 0.80 kg, 0.15 mg MDA/kg) meat compared with AP0 (26.49%, 1.13 kg, 0.23 mg MDA/kg) meat. Meat redness was higher (p < .05) in APL (13.49) and APW (12.98) than AP0 (10.86). Sensory scores for juiciness, tenderness, and overall acceptability of APL (7.92, 7.88, 7.89) and APW (7.90, 7.08, 7.77) meat were higher (p < .05) than that of the AP0 (5.38, 5.95, 5.41) meat. Total viable counts and populations of Pseudomonas spp, Escherichia coli and Enterobacteriacea were higher (p < .05) in AP0 meat than in APL and APW meat. The APL exhibited higher (p < .05) antimicrobial potential than the APW. Chill storage affected (p < .05) the physicochemical properties, lipid oxidation and microbial counts in chevon. Dietary APL and APW enhanced the beneficial fatty acids, quality attributes and oxidative stability, and reduced microbial counts in chevon.
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Affiliation(s)
- Aisha L Yusuf
- Department of Animal Science, Faculty of Agriculture, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor Darul Ehsan, Malaysia; Department of Animal Science, Usmanu Danfodiyo University, P.M.B. 2346, Sokoto, Nigeria
| | - Kazeem D Adeyemi
- Department of Animal Science, Faculty of Agriculture, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor Darul Ehsan, Malaysia; Department of Animal Production, Faculty of Agriculture, University of Ilorin, P.M.B 1515, Ilorin, Nigeria
| | - Karim Roselina
- Department of Food Technology, Faculty of Food Science and Technology, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor Darul Ehsan, Malaysia
| | - Abdul Razak Alimon
- Department of Animal Science, Faculty of Agriculture, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor Darul Ehsan, Malaysia
| | - Yong M Goh
- Department of Veterinary Preclinical Sciences, Faculty of Veterinary Medicine, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor Darul Ehsan, Malaysia
| | - Anjas A Samsudin
- Department of Animal Science, Faculty of Agriculture, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor Darul Ehsan, Malaysia
| | - Awis Q Sazili
- Department of Animal Science, Faculty of Agriculture, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor Darul Ehsan, Malaysia; Laboratory of Sustainable Animal Production and Biodiversity, Institute of Tropical Agriculture and Food Security, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor Darul Ehsan, Malaysia; Halal Products Research Institute, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor Darul Ehsan, Malaysia.
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12
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Vardakas KZ, Mavroudis AD, Georgiou M, Falagas ME. Intravenous colistin combination antimicrobial treatment vs. monotherapy: a systematic review and meta-analysis. Int J Antimicrob Agents 2018; 51:535-547. [PMID: 29288723 DOI: 10.1016/j.ijantimicag.2017.12.020] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [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: 10/10/2017] [Revised: 11/20/2017] [Accepted: 12/16/2017] [Indexed: 01/25/2023]
Abstract
BACKGROUND To evaluate whether intravenous colistin in combination with other antibiotics (IVCC) is associated with lower mortality compared with intravenous colistin monotherapy (IVCM), and to identify factors influencing study outcomes. METHODS PubMed and Scopus were searched up to November 2016. Studies were included if they evaluated adult patients with multi-drug-resistant (MDR) or extensively-drug-resistant Gram-negative infections, and reported comparative mortality data (adjusted and unadjusted) for patients receiving IVCC vs. IVCM. Random effects meta-analyses were performed. FINDINGS Thirty-two studies (29 observational, three randomized) were included. The overall quality of data was low to very low, and studies were characterized by the lack of adjusted data. The majority of studies were not designed to evaluate the outcome of the meta-analysis, and focused mainly on infections due to Acinetobacter baumannii and Klebsiella pneumoniae. Colistin was administered at variable doses, with or without a loading dose, and in combination with several antibiotics. Overall, IVCC was not associated with lower mortality than IVCM [32 studies, 2328 patients, risk ratio (RR) 0.91, 95% confidence interval (CI) 0.81-1.02, I2 8%]. A significant difference was observed in favour of IVCC when high-dose (>6 million international units) colistin was used (RR 0.80, 95% CI 0.69-0.93), in studies conducted in Asia (RR 0.82, 95% CI 0.71-0.95), in patients with bacteraemia (RR 0.75, 95% CI 0.57-0.98) and in patients with acinetobacter infections (RR 0.88, 95% CI 0.78-1.00). INTERPRETATION Overall, low-quality data suggest that IVCC did not lower mortality in patients with MDR Gram-negative infections. However, there is some evidence for a benefit observed with high intravenous doses of colistin.
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Affiliation(s)
- Konstantinos Z Vardakas
- Alfa Institute of Biomedical Sciences, Athens, Greece; Department of Medicine, Henry Dunant Hospital Centre, Athens, Greece
| | | | | | - Matthew E Falagas
- Alfa Institute of Biomedical Sciences, Athens, Greece; Department of Medicine, Henry Dunant Hospital Centre, Athens, Greece; Department of Medicine, Tufts University School of Medicine, Boston, MA, USA.
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13
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Spanu C, Piras F, Mocci AM, Nieddu G, De Santis EPL, Scarano C. Use of Carnobacterium spp protective culture in MAP packed Ricotta fresca cheese to control Pseudomonas spp. Food Microbiol 2018; 74:50-56. [PMID: 29706337 DOI: 10.1016/j.fm.2018.02.020] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Revised: 01/15/2018] [Accepted: 02/28/2018] [Indexed: 10/17/2022]
Abstract
Ricotta fresca is a whey cheese susceptible of secondary contamination, mainly from Pseudomonas spp. The extension of the shelf life of refrigerated ricotta fresca could be obtained using protective cultures inhibiting the growth of this spoilage microorganism. A commercial biopreservative, Lyofast CNBAL, comprising Carnobacterium spp was tested against Pseudomonas spp. The surface of ricotta fresca samples were inoculated either with Pseudomonas spp or Pseudomonas and Carnobacterium spp. Samples were MAP packed, stored at 4 °C and analyzed the day of the inoculum and 7, 14 and 21 days after the contamination. Microbiological analyses included total bacterial count, mesophilic lactic acid bacteria, Enterobacteriaceae, Pseudomonas spp, Listeria monocytogenes, moulds and yeasts. Pseudomonas mean initial contamination level was comparable in blank and artificially inoculated samples, respectively with values of 2.15 ± 0.21 and 2.34 ± 0.26 log cfu g-1. Carnobacterium spp. significantly reduced the growth of Pseudomonas spp respectively of 1.28 log and 0.83 log after 14 and 21 days of refrigerated storage. Intrinsic properties and physico-chemical composition were also investigated. Limited variation of pH was observed in samples inoculated with the protective cultures, indicating low acidification properties of Carnobacterium spp. Instead, no significant differences were observed for aW, moisture, fat and proteins during storage and between inoculated and control samples.
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Affiliation(s)
- C Spanu
- Department of Veterinary Medicine, University of Sassari, Via Vienna 2, 07100, Sassari, Italy
| | - F Piras
- Department of Veterinary Medicine, University of Sassari, Via Vienna 2, 07100, Sassari, Italy
| | - A M Mocci
- Department of Veterinary Medicine, University of Sassari, Via Vienna 2, 07100, Sassari, Italy
| | - G Nieddu
- Cooperativa Allevatori Ovini Formaggi Soc. Coop. Agricola, Loc. "Perda Lada" Fenosu, 09170, Oristano, Italy
| | - E P L De Santis
- Department of Veterinary Medicine, University of Sassari, Via Vienna 2, 07100, Sassari, Italy.
| | - C Scarano
- Department of Veterinary Medicine, University of Sassari, Via Vienna 2, 07100, Sassari, Italy
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14
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Kang Y, Hao Y, Xia D, Shen M, Li Q, Hu J. The effects of pig manure application on the spread of tetracycline resistance in bulk and cucumber rhizosphere soils: a greenhouse experiment. Can J Microbiol 2017; 63:563-572. [PMID: 28222270 DOI: 10.1139/cjm-2016-0767] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
It is important to understand the dynamics of tetracycline-resistant bacteria (TRB) and tetracycline resistance genes (TRGs) in bulk and rhizosphere soils for evaluating the spread of TRGs from pig manure to human. In this work, a greenhouse experiment was conducted to investigate the difference in abundance of TRB, tetracycline-resistant Escherichia coli (TRE), tetracycline-resistant Pseudomonas spp. (TRP), and TRGs between bulk and cucumber rhizosphere soils. The application of pig manure resulted in the long-term persistence of TRB, TRE, TRP, and TRGs in bulk soil and rhizosphere of cucumber for at least 65 days. Pig manure application dose was the major driving force in altering the abundances of TRB and TRE, whereas TRP was disturbed mainly by compartment (bulk soil or rhizosphere). Both TRE and the percentage of TRE in bulk and rhizosphere soils increased linearly with an increase in dose of pig manure. The exponential relationships between pig manure dose and TRP along with TRP percentage were also noted. There were significant differences in the relative abundances of TRGs between bulk and cucumber rhizosphere soils, suggesting the use of pig manure exerted a more lasting impact on the spread of TRGs in the rhizosphere than in the bulk soil.
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Affiliation(s)
- Yijun Kang
- a Environmental Science & Engineering, Yangzhou University, Yangzhou, Jiangsu 225127, People's Republic of China.,b College of Marine and Bio-engineering, Yancheng Teachers University, Yancheng, Jiangsu, People's Republic of China
| | - Yangyang Hao
- a Environmental Science & Engineering, Yangzhou University, Yangzhou, Jiangsu 225127, People's Republic of China
| | - Dan Xia
- b College of Marine and Bio-engineering, Yancheng Teachers University, Yancheng, Jiangsu, People's Republic of China
| | - Min Shen
- b College of Marine and Bio-engineering, Yancheng Teachers University, Yancheng, Jiangsu, People's Republic of China
| | - Qing Li
- a Environmental Science & Engineering, Yangzhou University, Yangzhou, Jiangsu 225127, People's Republic of China
| | - Jian Hu
- a Environmental Science & Engineering, Yangzhou University, Yangzhou, Jiangsu 225127, People's Republic of China
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Chaves Lopez C, Serio A, Rossi C, Mazzarrino G, Marchetti S, Castellani F, Grotta L, Fiorentino FP, Paparella A, Martino G. Effect of diet supplementation with Ascophyllum nodosum on cow milk composition and microbiota. J Dairy Sci 2016; 99:6285-6297. [PMID: 27320666 DOI: 10.3168/jds.2015-10837] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [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: 12/30/2015] [Accepted: 04/22/2016] [Indexed: 01/25/2023]
Abstract
Iodine deficiency remains a major public health concern in many countries, including some European regions. This study aimed at understanding the effect of a supplement of marine alga Ascophyllum nodosum as a iodine fortifier in the cow diet, on the compositional and microbiological quality of milk. The results obtained in this work indicated that the dietary inclusion of A. nodosum exerted significant effects on cow milk composition. In particular, it increased iodine content and reduced the quantity of free amino acids without modifying the free fatty acid content. From a microbiological point of view, statistically significant differences were found in presumptive mesophilic lactobacilli, mesophilic lactococci, and Pseudomonas spp. counts. Based on a culture-independent method, milk obtained after dietary inclusion of A. nodosum harbored the highest number of Firmicutes (e.g., Lactococcus lactis) and the lowest number of Proteobacteria (e.g., Pseudomonas). In addition to changes in bacterial population, diet supplementation with A. nodosum changed the catabolic profiles of the milk community, according to Biolog Ecoplate (Biolog Inc., Hayward, CA) results. The results of this study suggest that the dietary inclusion of the marine alga A. nodosum led to an improvement of the iodine content in milk, and to a modification of its microbiota with a positive effect on milk hygiene and transformation.
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Affiliation(s)
- Clemencia Chaves Lopez
- Faculty of Bioscience and Technology for Food, Agriculture and Environment, University of Teramo, Mosciano S. Angelo (TE), Italy 64023.
| | - Annalisa Serio
- Faculty of Bioscience and Technology for Food, Agriculture and Environment, University of Teramo, Mosciano S. Angelo (TE), Italy 64023
| | - Chiara Rossi
- Faculty of Bioscience and Technology for Food, Agriculture and Environment, University of Teramo, Mosciano S. Angelo (TE), Italy 64023
| | - Giovanni Mazzarrino
- Faculty of Bioscience and Technology for Food, Agriculture and Environment, University of Teramo, Mosciano S. Angelo (TE), Italy 64023
| | - Sonia Marchetti
- Faculty of Bioscience and Technology for Food, Agriculture and Environment, University of Teramo, Mosciano S. Angelo (TE), Italy 64023
| | - Federica Castellani
- Faculty of Bioscience and Technology for Food, Agriculture and Environment, University of Teramo, Mosciano S. Angelo (TE), Italy 64023
| | - Lisa Grotta
- Faculty of Bioscience and Technology for Food, Agriculture and Environment, University of Teramo, Mosciano S. Angelo (TE), Italy 64023
| | - Francesco Paolo Fiorentino
- Faculty of Bioscience and Technology for Food, Agriculture and Environment, University of Teramo, Mosciano S. Angelo (TE), Italy 64023
| | - Antonello Paparella
- Faculty of Bioscience and Technology for Food, Agriculture and Environment, University of Teramo, Mosciano S. Angelo (TE), Italy 64023
| | - Giuseppe Martino
- Faculty of Bioscience and Technology for Food, Agriculture and Environment, University of Teramo, Mosciano S. Angelo (TE), Italy 64023
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16
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González-Fandos E, Maya N, Pérez-Arnedo I. Effect of propionic acid on Campylobacter jejuni attached to chicken skin during refrigerated storage. Int Microbiol 2016; 18:171-5. [PMID: 27036744 DOI: 10.2436/20.1501.01.247] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2015] [Accepted: 09/10/2015] [Indexed: 11/15/2022]
Abstract
The ability of propionic acid to reduce Campylobacter jejuni on chicken legs was evaluated. Chicken legs were inoculated with Campylobacter jejuni. After dipping legs in either water (control), 1% or 2% propionic acid solution (vol/vol), they were stored at 4ºC for 8 days. Changes in C. jejuni, psychrotrophs and Pseudomonas counts were evaluated. Washing in 2% propionic acid significantly reduced C. jejuni counts compared to control legs, with a decrease of about 1.62 log units after treatment. Treatment of chicken legs with 1 or 2% propionic acid significantly reduced numbers of psychrotrophs 1.01 and 1.08 log units and Pseudomonas counts 0.75 and 0.96 log units, respectively, compared to control legs. The reduction in psychrotrophs and Pseudomonas increased throughout storage. The highest reductions obtained for psychrotrophs and Pseudomonas counts in treated legs were reached at the end of storage, day 8, being 3.3 and 2.93 log units, respectively, compared to control legs. Propionic acid treatment was effective in reducing psychrotrophs and Pseudomonas counts on chicken legs throughout storage. It is concluded that propionic acid is effective for reducing C. jejuni populations in chicken.
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Affiliation(s)
- Elena González-Fandos
- Food Technology Department, CIVA Research Center, University of La Rioja, Logroño, Spain
| | - Naiara Maya
- Food Technology Department, CIVA Research Center, University of La Rioja, Logroño, Spain
| | - Iratxe Pérez-Arnedo
- Food Technology Department, CIVA Research Center, University of La Rioja, Logroño, Spain
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17
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Tremonte P, Sorrentino E, Succi M, Tipaldi L, Pannella G, Ibañez E, Mendiola JA, Di Renzo T, Reale A, Coppola R. Antimicrobial Effect of Malpighia Punicifolia and Extension of Water Buffalo Steak Shelf-Life. J Food Sci 2015; 81:M97-105. [PMID: 26556435 PMCID: PMC4737311 DOI: 10.1111/1750-3841.13141] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2015] [Accepted: 10/05/2015] [Indexed: 11/29/2022]
Abstract
In the present study, a multiple approach was used to characterize Malpighia punicifolia extract and to evaluate its inhibitory activity against several meat spoilage bacteria. First, volatile fraction, vitamins and phenolic compounds of the extract obtained by supercritical fluid extraction were determined by GC‐MS and HPLC. Then, the antimicrobial action of the extract was in vitro evaluated against Pseudomonas putida DSMZ 291T, Pseudomonas fluorescens DSMZ 50009T, Pseudomonas fragi DSMZ 3456T, and Brochothrix thermosphacta DSMZ 20171T by the agar well diffusion assay and by the agar dilution test. Based on the results of the minimum inhibitory concentration (MIC) against the assayed bacteria, 4 different concentrations of the extract were used in a challenge test on water buffalo steaks stored for 21 d at 4 °C. Results of chemical analyses showed that M. punicifolia extract is characterized by the presence of several compounds, already described for their antimicrobial (phenolic acids, flavonones, and furanes) and antioxidant (ascorbic acid) properties. The in vitro detection of antimicrobial activities highlighted that the extract, used at 8% concentration, was able to inhibit all the target bacteria. Moreover, very low MIC values (up to 0.025%) were detected. In situ tests, performed on water buffalo steaks treated with the extract in the concentration range 0.025% to 0.05%, showed a strong inhibition of both intentionally inoculated bacteria and naturally occurring microorganisms. Positive results, in terms of color and odor, were also observed during the entire storage of steaks preserved with the extract.
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Affiliation(s)
- Patrizio Tremonte
- Dept. of Agricultural, Environmental and Food Sciences (DiAAA), Univ. of Molise, via De Sanctis, 86100 Campobasso, Italy
| | - Elena Sorrentino
- Dept. of Agricultural, Environmental and Food Sciences (DiAAA), Univ. of Molise, via De Sanctis, 86100 Campobasso, Italy
| | - Mariantonietta Succi
- Dept. of Agricultural, Environmental and Food Sciences (DiAAA), Univ. of Molise, via De Sanctis, 86100 Campobasso, Italy
| | - Luca Tipaldi
- Dept. of Agricultural, Environmental and Food Sciences (DiAAA), Univ. of Molise, via De Sanctis, 86100 Campobasso, Italy
| | - Gianfranco Pannella
- Dept. of Agricultural, Environmental and Food Sciences (DiAAA), Univ. of Molise, via De Sanctis, 86100 Campobasso, Italy
| | - Eléna Ibañez
- Inst. of Food Science Research, CIAL (CSIC-UAM), c/Nicolás Cabrera, 9, 28049, Madrid, Spain
| | - Jose Antonio Mendiola
- Inst. of Food Science Research, CIAL (CSIC-UAM), c/Nicolás Cabrera, 9, 28049, Madrid, Spain
| | - Tiziana Di Renzo
- Inst. of Food Science of the National Research Council (ISA-CNR), via Roma, 64, 83100, Avellino, Italy
| | - Anna Reale
- Inst. of Food Science of the National Research Council (ISA-CNR), via Roma, 64, 83100, Avellino, Italy
| | - Raffaele Coppola
- Dept. of Agricultural, Environmental and Food Sciences (DiAAA), Univ. of Molise, via De Sanctis, 86100 Campobasso, Italy
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18
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Rajkumari N, John NV, Mathur P, Misra MC. Antimicrobial Resistance in Pseudomonas sp. Causing Infections in Trauma Patients: A 6 Year Experience from a South Asian Country. J Glob Infect Dis 2014; 6:182-5. [PMID: 25538457 PMCID: PMC4265834 DOI: 10.4103/0974-777x.145250] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
Drug resistance to Pseudomonas sp. has spread to such a level irrespective of the type of patients, that its pattern of distribution and antibiotic resistance needs to be studied in detail, especially in trauma patients and hence the study. A 6 year study was carried out among trauma patients to see the trend and type of resistance prevalent in the apex hospital for trauma care in India among nonduplicate isolates where multidrug-resistance (MDR), cross-resistance and pan-drug resistance in Pseudomonas sp. were analyzed. Of the total 2,269 isolates obtained, the species, which was maximally isolated was Pseudomonas aeruginosa (2,224, 98%). The highest level of resistance was seen in tetracycline (2,166, 95.5%, P < 0.001) and chloramphenicol (2,160, 95.2%, P < 0.001) and least in meropenem (1,739, 76.7%, P < 0.003). Of the total, 1,692 (74.6%) isolates were MDR in which P. aeruginosa (75%) were maximum. MDR Pseudomonas is slowing increasing since the beginning of the study period. Of 1,797 imipenem-resistant P. aeruginosa isolated during the study period, 1,763 (98%) showed resistance to ciprofloxacin or levofloxacin, suggesting that cross-resistance may have developed for imipenem due to prior use of fluoroquinolones. Antibiotic resistance in Pseudomonas sp. is fast becoming a problem in trauma patients, especially in those who requires prolong hospital stay, which calls for proper antimicrobial stewardship.
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Affiliation(s)
- Nonika Rajkumari
- Department of Laboratory Medicine, Microbiology Division, All India Institute of Medical Sciences, New Delhi, India
| | - Nibu Varghese John
- Hospital Infection Control Unit, All India Institute of Medical Sciences, New Delhi, India
| | - Purva Mathur
- Department of Laboratory Medicine, Microbiology Division, All India Institute of Medical Sciences, New Delhi, India
| | - Mahesh Chandra Misra
- Department of Surgical Disciplines, Jai Prakash Narayan Apex Trauma Centre, All India Institute of Medical Sciences, New Delhi, India
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Bakker PA, Doornbos RF, Zamioudis C, Berendsen RL, Pieterse CM. Induced systemic resistance and the rhizosphere microbiome. Plant Pathol J 2013; 29:136-43. [PMID: 25288940 PMCID: PMC4174772 DOI: 10.5423/ppj.si.07.2012.0111] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2012] [Accepted: 08/22/2012] [Indexed: 05/04/2023]
Abstract
Microbial communities that are associated with plant roots are highly diverse and harbor tens of thousands of species. This so-called microbiome controls plant health through several mechanisms including the suppression of infectious diseases, which is especially prominent in disease suppressive soils. The mechanisms implicated in disease suppression include competition for nutrients, antibiosis, and induced systemic resistance (ISR). For many biological control agents ISR has been recognized as the mechanism that at least partly explains disease suppression. Implications of ISR on recruitment and functioning of the rhizosphere microbiome are discussed.
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Affiliation(s)
- Peter A.H.M. Bakker
- Plant-Microbe Interactions, Department of Biology, Faculty of Science, Utrecht University, Padualaan 8, 3584 CH Utrecht, the Netherlands
| | - Rogier F. Doornbos
- Plant-Microbe Interactions, Department of Biology, Faculty of Science, Utrecht University, Padualaan 8, 3584 CH Utrecht, the Netherlands
| | - Christos Zamioudis
- Plant-Microbe Interactions, Department of Biology, Faculty of Science, Utrecht University, Padualaan 8, 3584 CH Utrecht, the Netherlands
| | - Roeland L. Berendsen
- Plant-Microbe Interactions, Department of Biology, Faculty of Science, Utrecht University, Padualaan 8, 3584 CH Utrecht, the Netherlands
| | - Corné M.J. Pieterse
- Plant-Microbe Interactions, Department of Biology, Faculty of Science, Utrecht University, Padualaan 8, 3584 CH Utrecht, the Netherlands
- Centre for BioSystems Genomics, P.O. Box 98, 6700 AB Wageningen, the Netherlands
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Bakker PAHM, Berendsen RL, Doornbos RF, Wintermans PCA, Pieterse CMJ. The rhizosphere revisited: root microbiomics. Front Plant Sci 2013; 4:165. [PMID: 23755059 PMCID: PMC3667247 DOI: 10.3389/fpls.2013.00165] [Citation(s) in RCA: 187] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2013] [Accepted: 05/10/2013] [Indexed: 05/18/2023]
Abstract
The rhizosphere was defined over 100 years ago as the zone around the root where microorganisms and processes important for plant growth and health are located. Recent studies show that the diversity of microorganisms associated with the root system is enormous. This rhizosphere microbiome extends the functional repertoire of the plant beyond imagination. The rhizosphere microbiome of Arabidopsis thaliana is currently being studied for the obvious reason that it allows the use of the extensive toolbox that comes with this model plant. Deciphering plant traits that drive selection and activities of the microbiome is now a major challenge in which Arabidopsis will undoubtedly be a major research object. Here we review recent microbiome studies and discuss future research directions and applicability of the generated knowledge.
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Affiliation(s)
- Peter A. H. M. Bakker
- Plant-Microbe Interactions, Department of Biology, Faculty of Science, Utrecht UniversityUtrecht, Netherlands
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