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排序方式: 共有719条查询结果,搜索用时 15 毫秒
141.
Souza SC Leone C Takano OA Moratelli HB 《Cadernos de saúde pública / Ministério da Saúde, Funda??o Oswaldo Cruz, Escola Nacional de Saúde Pública》2008,24(8):1917-1926
The aim of this study was to assess the neuropsychomotor development of children enrolled in daycare centers and preschools. This cross-sectional study used 38 items from the Denver II test to assess four and five-year-olds enrolled in the municipal school system in Cuiabá, Mato Grosso State, Brazil, from August 2002 to November 2003. There were 960 children enrolled in 27 daycare centers and two public preschools. Statistical analysis used the C2 test with a 95% confidence interval and +/- = 5%. Logistic regression was used to calculate the percentages with which the preschoolers passed the test at each respective age. Of the 960 preschoolers tested, 67% showed normal performance, 30.2% borderline, and 2.8% abnormal. In 27 of the 38 items, the proportion of correct answers was greater than 90%. Altered performance was more common in five-year-old boys. Performance in this sample was quite similar to that of preschoolers in Denver, Colorado, USA. The best results by gender were for girls, and by age in four-year-olds. 相似文献
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J. Thomas Danzi M.D. F.A.CP. Thomas J. McDonald M.D. † Joseph King M.D ‡ 《The American journal of gastroenterology》1988,83(1):83-85
A middle-aged female with chronic, watery diarrhea was diagnosed after extensive evaluation as having collagenous colitis. The clinical, histological, and pathological findings of our case and those previously reported are reviewed. The diagnostic importance of total colonoscopy with biopsy in a normal-appearing colon in a patient with chronic, undiagnosed, watery diarrhea is discussed. 相似文献
148.
Incomplete antigenic cross-reactivity between platelets and megakaryocytes: relevance to ITP 总被引:6,自引:2,他引:4
Immune thrombocytopenias are usually associated with normal or increased numbers of megakaryocytes in the marrow. Therefore, the mechanism(s) responsible for the destruction of circulating platelets may not affect megakaryocytes in the same way. One of the possibilities which could account for the differential effect on the cells would be the development of antibodies to components of platelet membranes which are not exposed on the surface of all megakaryocytes. To investigate this possibility, a rabbit antiserum specific for mouse platelets was tested against fresh and cultured mouse megakaryocytes by indirect immunofluorescence. This antiserum cross-reacted with 46% of fresh murine megakaryocytes and 54% of cultured megakaryocytes. Phase- contrast microscopy revealed the reacting megakaryocytes to be fully granulated with irregular contours and in the process of releasing platelets. Nonreactive megakaryocytes demonstrated smooth contours and lacked morphological evidence of thrombocytopoiesis. Electron microscopy showed that only in megakaryocytes (MK) with an irregular contour had the demarcation membrane system (DMS) reached continuity with the plasma membrane. Ultrastructural analysis of megakaryocytes from patients with ITP showed approximately 25% to 50% of megakaryocytes without evidence of injury, whereas 50% to 75% had extensive damage. In undamaged cells, platelet territories had not yet reached the peripheral zone. The DMS of damaged megakaryocytes opened to the exterior elaborating platelets. The observations suggested that some platelet antibodies react only with megakaryocytes which have reached the stage of thrombocytopoiesis. Relevant target antigens may not be exposed on all megakaryocytes before cytoplasmic fragmentation occurs. 相似文献
149.
Vinicius Lins Ferreira Helena Hiemisch Lobo Borba Astrid Wiens Maria Lucia Alves Pedroso Vanessa Ferreira de Camargo Radunz Cláudia Alexandra Pontes Ivantes Aline Satie Oba Kuniyoshi Roberto Pontarolo 《The Brazilian journal of infectious diseases》2018,22(3):186-192
Background
This study aimed to evaluate the clinical effectiveness in terms of sustained virological response and tolerability of available second generation direct-acting antivirals in Brazilian patients.Methods
This was a retrospective observational study conducted in six centers in Southern Brazil. The sample comprised adult patients who were chronically infected with hepatitis C virus, regardless of virus genotype, fibrosis stage, or prior treatment. Statistical analysis was performed to compare the effectiveness among the treatments, and also to uncover the factors influencing the achievement of sustained virological response.Results
A total of 296 patients were included in the study, with the majority receiving sofosbuvir with daclatasvir (59%) or sofosbuvir with simeprevir (26%). Overall sustained virological response rates were approximately 91.6%. For genotype 1, sofosbuvir with daclatasvir had an sustained virological response rate of approximately 95%, while the sustained virological response rate of sofosbuvir with simeprevir was 92%; this difference was statistically significant only for subtype 1b. The only treatment used for genotype 3 patients was sofosbuvir with daclatasvir, and lower rates of sustained virological response were observed for this group, compared to genotype 1 (84% versus 95%, p < 0.05). Apart from this difference between genotypes, and a difference between patients who achieved rapid virologic response compared with those who did not, there were no other statistically significant factors associated with sustained virological response.Conclusions
The results point to the effectiveness of second-generation direct-acting antivirals in hepatitis C virus Brazilian patients, especially those with genotype 1. Furthermore, that patients with genotype 3 need more attention and adjustments in available treatment options. 相似文献150.