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| Registros recuperados: 62 | |
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| França,Raquel C.S; Lopes,Maria Rosélia Marques; Ferragut,Carla. |
| The colonization process and successional patterns of a periphytic algal community were evaluated in a Amazonian Viveiro Lake (Rio Branco, Acre, Brazil). Sampling was performed over a period of 35 days; at four-day intervals for 20 days, and then at five-day intervals. Water sampling for physical, chemical and biological analyses was done during the dry and rainy season. Glass slides were used as artificial substrates for periphyton colonization. The structural community was evaluated through population density, algae class, diversity indices and descriptive species. Species richness, diversity and evenness increased as succession progressed. While density of Bacillariophyceae, Euglenophyceae and Zygnemaphyceae increased with succession, Cyanobacteria... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Periphyton; Colonization; Succession; Diversity. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672011000200010 |
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| Marins,Josy Fraccaro de; Carrenho,Rosilaine. |
| ABSTRACT There have been several reports of symbionts in the roots of plants that live in aquatic environments. Arbuscular mycorrhizal fungi (AMF) are the most common microsymbionts and possibly recolonized the aquatic environment together with plants; however, their functions and the extent of their benefits are unclear. Furthermore, the presence of other groups of fungi, such as dark septate fungi (DSF), with functions supposedly analogous to those of mycorrhizal fungi, has also been reported. The present work provides a compilation of data regarding the presence of arbuscular mycorrhizae in plants from, or under the influence of, aquatic environments, and co-colonization by AMF and DSF. Forty species of non-vascular plants, ferns, fern allies, and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Colonization; Flooding; Fungal co-occurrence; Macrophytes; Taxonomic diversity. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062017000200295 |
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| Candido,Helder Marcos Nunes; Miazaki,Ângela; Pontara,Vanessa; Bueno,Marcelo Leandro; Solar,Ricardo; Gastauer,Markus; Meira-Neto,João Augusto Alves. |
| ABSTRACT The growth-survival trade-off hypothesis states that functional traits of stem, wood, leaves and fruits govern acquisitive and conservative strategies of plant species that grow/survive differently in forests. We aimed to determine whether heterogeneity during the colonization of a secondary Atlantic Forest fragment causes differences in colonization-related traits and determines taxonomic composition of subplots. A total of 5,078 subplots were censused with leaf and fruit traits and height measurements being determined for each tree of each species, and with averaged-abundance-weighted values calculated for each subplot. A dendrogram was generated from the taxonomic composition of subplots using Sorensen similarity and UPGMA clustering. A total... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Colonization; Fruit size; LEEP 50-ha plot; Leaf functional traits; Plant height; Wood density; Plant functional traits; Phytosociology. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062020000100001 |
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| Felisberto, Sirlene Aparecida; Universidade Federal de Goiás; Rodrigues, Liliana; Universidade Estadual de Maringá. |
| Periphytic algal community in artificial and natural substratum in a tributary of the Rosana reservoir (Corvo Stream, Paraná State, Brazil). This study evaluated the heterogeneity in periphytic algal community, under the influence of time colonization on artificial substratum. We also examined which abiotic variables most influenced the community in natural and artificial substratum. Egeria najas Planchon was used as natural substratum, and a plastic plant, as artificial. This experiment was carried out in a lateral arm from Rosana Reservoir, formed by Corvo Stream (Paranapanema river basin), in the period from November 21st to December 12nd, 2003, characterized as a warm and rainy period. Changes in species composition were assessed using the similarity... |
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Palavras-chave: 2.00.00.00-6; 2.05.02.00-1 Ecology; Colonization; Phycoperiphyton; Zygnemaphyceae; Similarity Ecologia Ecology; Colonization; Phycoperiphyton; Zygnemaphyceae; Similarity. |
| Ano: 2010 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/4627 |
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| GUSHIKEN,CAROLINA Y.; MEDEIROS,LILIANE B.; CORREIA,BRUNA P.; SOUZA,JOYCE M.; MORIS,DANIELA V.; PEREIRA,VALERIA C.; GIUFFRIDA,ROGERIO; RODRIGUES,MARCUS V.P.. |
| ABSTRACT Staphylococcus aureus can cause a variety of infections due to its high transmissibility, high pathogenic potential and resistance to multiple drugs, factors that contribute to the relevance of infections in healthcare services. The aim of this study was to document phenotypic and genotypic resistance factors of Staphylococcus aureus strains, isolated from nasal mucosa of medical students. A nasal swab was collected from the nares (nostrils) of 222 medical students. After collection, the samples were submitted to isolation and identification procedures. From 204 valid samples, 20.6% (42 samples) were positive for S. aureus. For the assessment of phenotypic resistance by disk-diffusion technique, from 42 samples, 95.2% showed resistance to... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Multidrug resistance; Colonization; MLSB resistance; MRSA. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000401501 |
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| Mattos,Katherine A.; Pádua,Vania L.M.; Romeiro,Alexandre; Hallack,Leticia F.; Neves,Bianca C.; Ulisses,Tecia M.U.; Barros,Claudia F.; Todeschini,Adriane R.; Previato,José O.; Mendonça-Previato,Lucia. |
| Burkholderia kururiensis is a diazotrophic bacterium originally isolated from a polluted aquifer environment and presents a high level of similarity with the rice endophyte "B. brasilensis" species. This work assessed the ability of B. kururiensis to endophytically colonize rice plantlets by monitoring different tissues of root-inoculated plants for the presence of bacterial growth in different media, electron microscopy and by 16S rDNA analysis. Observations of roots, stems and leaves of inoculated rice plantlets by electron microscopy revealed B. kururiensis colonization predominantly on root hair zones, demonstrating endophytic colonization primarily through the endodermis, followed by spreading into xylem vessels, a possible pathway leading to aerial... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Burkholderia kururiensis; Colonization; Rice; Diazotrophic bacterium; Auxin. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652008000300009 |
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| Varotto,Ricardo Silva; Barreto,Cristine Costa. |
| The colonization pattern of wooden panels by teredinid larvae released from a previously infested focus was investigated. Panels were placed at different distances (1, 10, 20m) and in different directions from the focus. The colonization experiment took place at Parcel do Aleijado, Ilha Grande Bay, RJ. The focus remained immersed in nearly surface water, by the coast, during three months for infestation by teredinids. After this period, it was transferred to the study site. The infested focus and colonization panels remained in water, 10m deep, for three months more. Total density and density of the dominant species were considered for each group of panels. Five teredinid species were found: Bankia fimbriatula, Bankia gouldi, Lyrodus floridanus, Lyrodus... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Teredinidae; Colonization; Benthic ecology; Dispersion. |
| Ano: 1998 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89131998000400002 |
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| Tresoldi,Antonia T.; Cardoso,Luis Gustavo O.; Castilho,Giane V.; Dantas,Sônia R. P. E.; von Nowakonski,Angela; Pereira,Ricardo M.; Trabasso,Plínio. |
| Vancomycin-resistant enterococci (VRE) are important pathogens involved in nosocomial infections. Colonization precedes infection and the number of colonized individuals is about 10 times higher than the number of infected patients. We examined VRE colonization in two intensive care units from October 2003 to June 2004. Perirectal swab specimens were obtained from all patients, starting on the 5th day after admission, and then weekly. A total of 249 swabs were obtained from 112 patients. Nine patients had VRE-positive swabs, giving a positive rate of 8.0%. The rate of patients colonized by V-R E. faecalis was 1.8% (n=2), 4.5% by V-R E. gallinarun (n=5) and 1.8% by V-R E. casseliflavus (n=2). No V-R E. faeciun was isolated. None of the patients that had... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Vancomycin-resistant enterococci; VRE; Colonization. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702006000400004 |
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| Kara,Ahu; Devrim,İlker; Bayram,Nuri; Katipoğlu,Nagehan; Kıran,Ezgi; Oruç,Yeliz; Demiray,Nevbahar; Apab,Hurşit; Gülfidan,Gamze. |
| Background:Vancomycin-resistant enterococci colonization has been reported to increase the risk of developing infections, including bloodstream infections.Aim:In this study, we aimed to share our experience with the vancomycin-resistant enterococci bloodstream infections following gastrointestinal vancomycin-resistant enterococci colonization in pediatric population during a period of 18 months.Method:A retrospective cohort of children admitted to a 400-bed tertiary teaching hospital in Izmir, Turkey whose vancomycin-resistant enterococci colonization was newly detected during routine surveillances for gastrointestinal vancomycin-resistant enterococci colonization during the period of January 2009 and December 2012 were included in this study. All... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bloodstream infections; Colonization; Immunosupression; Vancomycin-resistant enterococcus. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702015000100058 |
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| Akturk,Hacer; Sutcu,Murat; Somer,Ayper; Aydın,Derya; Cihan,Rukiye; Ozdemir,Aslı; Coban,Asuman; Ince,Zeynep; Citak,Agop; Salman,Nuran. |
| Abstract Background Little is known about factors associated with carbapenem-resistant Klebsiella pneumoniae infections in pediatric patients, who are initally colonized with carbapenem-resistant Klebsiella pneumoniae. Materials and methods A retrospective case–control study was conducted involving pediatric and neonatal intensive care units throughout a five-year period (January 2010–December 2014). Clinical and microbiological data were extracted from Hospital Infection Control Committee reports and patients’ medical records. Risk factors were assessed in carbapenem-resistant Klebsiella pneumoniae colonized patients who developed subsequent systemic infection (cases) and compared to carbapenem-resistant Klebsiella pneumoniae colonized patients who did... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Carbapenem resistant Klebsiella pneumoniae; Infection; Colonization; Pediatric/Neonatal intensive care. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702016000200134 |
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| Fortaleza,Carlos Magno Castelo Branco; Figueiredo,Lígia Castellon; Beraldo,Carolina Contador; Melo,Edson Carvalho de; Póla,Patrícia Maria Sales; Aragão,Valéria Drummond Nagem. |
| Oropharyngeal carriage of Pseudomonas aeruginosa is associated with increased risk of infection and may provide a source for spread of drug-resistant strains. In order to assess the incidence and risk factors of oropharyngeal carriage, we conducted a retrospective cohort study based on results of surveillance cultures (oropharyngeal swabs) from a medical-surgical intensive care unit, collected from March 2005 through May 2006. Variables investigated included demographic characteristics, comorbid conditions, invasive procedures, use of devices and use of antimicrobials. Thirty case patients with P. aeruginosa carriage were identified. Other 84 patients with surveillance cultures negative to P. aeruginosa were enrolled as control subjects. Case patients were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pseudomonas aeruginosa; Colonization; Oropharyngeal carriage; Surveillance cultures; Intensive care unit. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702009000300004 |
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| Silva,Eduardo Caetano Brandão Ferreira da; Antas,Maria das Graças C.; B. Neto,Armando Monteiro; Rabelo,Marcelle Aquino; Melo,Fábio Lopes de; Maciel,Maria Amélia Vieira. |
| Staphylococcus aureus is the main human pathogen that colonizes individuals in general population. The objective of the study was evaluate the epidemiological and sensitivity profile of S. aureus lineage, isolated in health care workers (HCW) of a University Hospital in Pernambuco state, Brazil. Biological samples of hands and nasal cavities were sown in agar sheep blood. Colonies under suspicion of being S. aureus were identified using Gram staining, catalase test and coagulase, mannitol-salty agar fermentation and DNAse agar. The resistance to mupirocin was analyzed through the Kirby Bauer technique. In relation to methicillin and vancomycin the determination was by the minimum inhibitory concentration method (E-test). From the 202 HCW evaluated, 52 were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Staphylococcus aureus; Colonization; Health staff. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702008000600012 |
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| Bonifácio da Silva,M.E.; Marin,J.M.. |
| Day care centers are a relatively new phenomenon in Brazil that bring together large numbers of young children susceptible to contagious diseases. Haemophilus influenzae (Hi) is an important infection in the age range of those attending day care centers. In the present study, the carriage rate of Haemophilus influenzae was identified in 38 day care attendees age 6 to 37 months, and 23 staff members, at a day care center in Ribeirão Preto-São Paulo, in 1997. To identify the carriers, two nasopharyngeal swabs were collected; one in July and one in December. The rate of H. influenzae carriers among the children was 77%. Only 2 of 23 staff members (9%) had Hi. Among the children, there were 58 isolates in the two sampling periods; 6 of the Hi were serotype b,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Haemophilus influenzae; Day care; Colonization. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702001000500004 |
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| Registros recuperados: 62 | |
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