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| Ramos,Daniela Fernandes; Matthiensen,Alexandre; Colvara,Wilson; Votto,Ana Paula Souza de; Trindade,Gilma Santos; Silva,Pedro Eduardo Almeida da; Yunes,João Sarkis. |
| Background The present work aimed to evaluate the antimycobacterial activity and cytotoxicity of Microcystis aeruginosa toxins, the MC-LR variant and purified extract of [D-Leu1] microcystin-LR. Methods The antimicrobial activity of M. aeruginosa extract and microcystin was evaluated by resazurin microtiter assay against Mycobacterium tuberculosis, M. terrae, M. chelonae and M. kansasii. The cytotoxicity assay was performed by trypan blue exclusion against the HTC cell line. Results Antimicrobial activity was observed in the hexanic extract of M. aeruginosa (RST 9501 strain) against M. tuberculosis, including sensitive and resistant strains with minimal inhibitory concentrations (MIC) between 1.93 μM and 0.06 μM. The high activity of M. aeruginosa hexanic... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Mycobacteria; Antimycobacterial agents; Cytotoxic activity; Microcystins. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992015000100315 |
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| Ramis,Ivy Bastos; Moraes,Ernani Pinho de; Fernandes,Márcia Silveira; Mendoza-Sassi,Raul; Rodrigues,Obirajara; Juliano,Carlos Renan Varela; Scaini,Carlos James; Silva,Pedro Eduardo Almeida da. |
| Helicobacter pylori infects nearly 50% of the world's population. This microorganism is accepted as the most important agent of gastritis and as a risk factor for peptic ulcer disease and gastric adenocarcinoma. Currently many diagnostic methods exist for detecting H. pylori, however they all have limitations, thus it is recommend a combination of at least two methods. The aim of this study was to evaluate diagnostic methods, such as in-house urease test, culture and Polymerase Chain Reaction (PCR), for the detection of the H. pylori in gastric biopsy specimens of 144 dyspeptic patients, using as gold standard the association between histology and rapid urease test. According to the gold standard used in this study, 48 (33.3%) patients were infected with... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Helicobacter pylori; Histology; Culture; Urease test; Polymerase Chain Reaction. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822012000300008 |
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| Silva,Pedro Eduardo Almeida da; Wiesel,Fernanda; Boffo,Maria Marta Santos; von Groll,Andréa; Mattos,Ivo Gomes de; Mejia,Glória; Robledo,Jaime. |
| Tuberculosis remains one of the major causes of mortality worldwide. The early detection of new cases is an important goal in the program of tuberculosis control. Several methodologies for rapid and accurate laboratorial diagnosis have been developed, however, some of these techniques are expensive or cumbersome, making their implementation in low-income regions unfeasible. In this study, the thin layer culture method was compared with conventional culture method and it was observed that it provides earlier results and a presumptive species identification, being adequate alternative method for rapid laboratory diagnosis. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Tuberculosis; Rapid diagnosis; Mycobacterium tuberculosis. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822007000300007 |
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| Ramos,Daniela Fernandes; Silva,Ana Bárbara Scholante; Fagundes,Michel Quevedo; von Groll,Andrea; Silva,Pedro Eduardo Almeida da; Dellagostin,Odir Antônio. |
| Bovine tuberculosis is a major infectious disease of the cattle. In this study, 85 M. bovis isolates from 162 lymph nodes, obtained from a herd of cattle on a farm in southern Brazil, were evaluated using spoligotyping and VNTR. The strains were grouped into five clusters and five orphans, showing a heterogenic genetic profile, what could represent diverse geographic origins of the introduced cows and/or the frequent movement of cattle between different properties. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bovine tuberculosis; Mycobacterium bovis; Genotyping. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822014000200039 |
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| Soares,Renata Oliveira; Macedo,Maíra Bidart de; von Groll,Andrea; Silva,Pedro Eduardo Almeida da. |
| A sublineage of Mycobacterium tuberculosis called RD Rio was described in 2007. Although only recently described, this strain may have been present previously in the population, and its identification in clinical isolates will elucidate bacterial transmission dynamics and host-pathogen interactions. This study evaluated the clonal diversity of the RD Rio sublineage in clinical isolates from Rio Grande-RS obtained between 1998 and 2001. Among the 45 samples analyzed by the MIRU-VNTR method, there were six clusters with two samples each and 33 orphan strains with unique pattern. The strains were distributed across several different lineages including LAM (34.04%), X (14.89%), Haarlem (12.77%), UgandaI (10.64%), S (4.26%), NEW-1 (2.13%) and Cameroon (2.13%);... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Mycobacterium tuberculosis; MIRU-VNTR; RDRio. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822013000400032 |
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