Institution
Oswaldo Cruz Foundation
Facility•Rio de Janeiro, Brazil•
About: Oswaldo Cruz Foundation is a facility organization based out in Rio de Janeiro, Brazil. It is known for research contribution in the topics: Population & Trypanosoma cruzi. The organization has 18673 authors who have published 36752 publications receiving 802378 citations. The organization is also known as: Fundação Oswaldo Cruz & FIOCRUZ.
Topics: Population, Trypanosoma cruzi, Immune system, Leishmania, Health care
Papers published on a yearly basis
Papers
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TL;DR: Control of Chagas disease must be undertaken by interrupting its transmission by vectors and blood transfusions, improving housing and areas surrounding dwellings, providing sanitation education for exposed populations and treating acute and recently infected chronic cases.
Abstract: Chagas disease originated millions of years ago as an enzootic infection of wild animals and began to be transmitted to humans as an anthropozoonosis when man invaded wild ecotopes. While evidence of human infection has been found in mummies up to 9,000 years old, endemic Chagas disease became established as a zoonosis only in the last 200-300 years, as triatomines adapted to domestic environments. It is estimated that 15-16 million people are infected with Trypanosoma cruzi in Latin America, and 75-90 million are exposed to infection. Control of Chagas disease must be undertaken by interrupting its transmission by vectors and blood transfusions, improving housing and areas surrounding dwellings, providing sanitation education for exposed populations and treating acute and recently infected chronic cases. These measures should be complemented by surveillance and primary, secondary and tertiary care.
378 citations
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TL;DR: In re‐evaluating the effects of laser therapy in wound healing, the role of extracellular matrix elements and myofibroblasts was analyzed.
Abstract: Background and Objective
In re-evaluating the effects of laser therapy in wound healing, the role of extracellular matrix elements and myofibroblasts, was analyzed.
Study Design/Materials and Methods
Cutaneous wounds were inflicted on the back of 72 Wistar rats. Low level laser was locally applied with different energy densities. Lesions were analyzed after 24, 48, 72 hours and 5, 7, and 14 days. Tissues were studied by histology, immunohistochemistry, and electron microscopy.
Results
In treated animals, the extent of edema and the number of inflammatory cells were reduced (P < 0.05), but the amount of collagen and elastic fibers appeared slightly increased. Desmin/smooth muscle alpha-actin-phenotype myofibroblasts were statistically more prominent on the 3rd day after surgery (P < 0.05) in treated wounds than in controls. Treatment with a dosage of 4 J/cm2 was superior to that with 8 J/cm2.
Conclusions
Laser therapy reduced the inflammatory reaction, induced increased collagen deposition and a greater proliferation of myofibroblasts in experimental cutaneous wounds. Lasers Surg. Med. 32:239–244, 2003. © 2003 Wiley-Liss, Inc.
373 citations
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TL;DR: Metacyclic trypomastigotes of Trypanosoma cruzi obtained in chemically defined axenic culture are resistant to complement lysis and to macrophage digestion and are able to infect mice with an efficiency similar to that obtained for natural metacyclo-trypomastsigotes obtained from triatomine excreta.
373 citations
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TL;DR: Deficiencies in the sanitation infrastructure where slum inhabitants reside were found to be environmental sources of Leptospira transmission, indicating that effective prevention of leptospirosis may need to address the social factors that produce unequal health outcomes among slum residents, in addition to improving sanitation.
Abstract: Background
Leptospirosis has become an urban health problem as slum settlements have expanded worldwide. Efforts to identify interventions for urban leptospirosis have been hampered by the lack of population-based information on Leptospira transmission determinants. The aim of the study was to estimate the prevalence of Leptospira infection and identify risk factors for infection in the urban slum setting.
372 citations
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TL;DR: TSP-2 in particular provided protection in excess of the 40% benchmark set by the World Health Organization for progression of schistosome vaccine antigens into clinical trials, and seems to be an effective vaccine antigen against S. mansoni.
Abstract: Schistosomes are blood-dwelling flukes that infect 200 million people worldwide and are responsible for hundreds of thousands of deaths annually. Using a signal sequence trap, we cloned from Schistosoma mansoni two cDNAs, Sm-tsp-1 and Sm-tsp-2, encoding the tetraspanin (TSP) integral membrane proteins TSP-1 and TSP-2. We raised antibodies to recombinant TSP fusion proteins and showed that both proteins are exposed on the surface of S. mansoni. Recombinant TSP-2, but not TSP-1, is strongly recognized by IgG1 and IgG3 (but not IgE) from naturally resistant individuals but is not recognized by IgG from chronically infected or unexposed individuals. Vaccination of mice with the recombinant proteins followed by challenge infection with S. mansoni resulted in reductions of 57% and 64% (TSP-2) and 34% and 52% (TSP-1) for mean adult worm burdens and liver egg burdens, respectively, over two independent trials. Fecal egg counts were reduced by 65-69% in both test groups. TSP-2 in particular provided protection in excess of the 40% benchmark set by the World Health Organization for progression of schistosome vaccine antigens into clinical trials. When coupled with its selective recognition by naturally resistant people, TSP-2 seems to be an effective vaccine antigen against S. mansoni.
372 citations
Authors
Showing all 18833 results
Name | H-index | Papers | Citations |
---|---|---|---|
Douglas T. Golenbock | 123 | 317 | 61267 |
Guy A. Zimmerman | 109 | 328 | 39740 |
David Brown | 105 | 1257 | 46827 |
Liam Smeeth | 104 | 753 | 53433 |
Ann M. Dvorak | 99 | 437 | 41073 |
David C. Spray | 95 | 400 | 28732 |
Theodore A. Slotkin | 89 | 575 | 30070 |
Fernando Q. Cunha | 88 | 682 | 31501 |
Mauro M. Teixeira | 86 | 713 | 31301 |
Ricardo T. Gazzinelli | 86 | 340 | 28233 |
Peter F. Weller | 85 | 331 | 22005 |
João B. Calixto | 81 | 460 | 23029 |
Frederic J. Seidler | 80 | 372 | 19564 |
João Santana da Silva | 80 | 399 | 19060 |
Deborah Carvalho Malta | 77 | 706 | 61000 |