首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   176篇
  免费   3篇
  国内免费   5篇
基础医学   33篇
口腔科学   2篇
临床医学   16篇
内科学   66篇
特种医学   1篇
外科学   7篇
综合类   36篇
预防医学   12篇
药学   9篇
中国医学   1篇
肿瘤学   1篇
  2023年   2篇
  2021年   1篇
  2018年   2篇
  2017年   2篇
  2016年   3篇
  2015年   1篇
  2014年   11篇
  2013年   6篇
  2012年   8篇
  2011年   6篇
  2010年   4篇
  2009年   8篇
  2008年   3篇
  2007年   6篇
  2006年   2篇
  2005年   2篇
  2004年   7篇
  2003年   7篇
  2002年   3篇
  2001年   1篇
  2000年   3篇
  1999年   1篇
  1998年   4篇
  1997年   8篇
  1996年   6篇
  1995年   15篇
  1994年   23篇
  1993年   18篇
  1992年   14篇
  1991年   6篇
  1990年   1篇
排序方式: 共有184条查询结果,搜索用时 15 毫秒
1.
2.
OBJECTIVE: The reported frequency of chronic liver disease, and particularly, Hepatitis C virus (HCV) infection in patients with oral lichen planus (OLP) shows geographical variation. The aim of this study was to determine the prevalence of chronic hepatic disease, Hepatitis B virus and HCV infection in patients with OLP and control subjects resident in Serbia. PATIENTS AND METHODS: In this prospective study 48 patients with OLP (33 women and 15 men, with a mean age of 49.7 years) and 60 control subjects (38 women and 22 men, with a mean age of 46.7 years) were examined for the presence of serological evidence of chronic hepatic disease, Hepatitis B surface antigen (HBsAg) and anti-HCV seropositivity. RESULTS: All patients with OLP had normal liver function. HBsAg was not found in any of the patients with OLP or control group. None of the patients with OLP or control subjects were HCV seropositive. CONCLUSION: Patients with OLP resident in Serbia do not have evidence of chronic liver disease or infection with HBV or HCV. The exact aetiological role between hepatic disease and OLP remains unclear.  相似文献   
3.
4.
本文采用ELISA法对25例慢性肝炎,105例肝硬化,64例肝癌,以及8例急性黄疸型肝炎进行了HBV标志物及抗-HCV的检测,结果:HBV感染率为80.6%,抗-HCV检测阳性率为46%,二者均阳性的双重感染率为32%。其中肝癌组双重感染明显高于肝硬化组,P<0.001。单纯抗-HCV检出率为10.8%,说明HBV是引起肝炎,肝硬化,肝癌的主要原因,而CV感染也是其致病因素。本文对有输血史的慢性肝炎,肝硬化,肝癌100例进行抗-HCV检测其阳性率为59%,而02例无输血史的肝病患者抗-HCV检出率为25%,输血组抗-HCV检出率明显高于无输血组,P<0.001。其中慢性肝炎,肝硬化,肝癌病人输血组抗-HCV检出率亦明显高于无输血组,各组P<0.001,故提示,HCV感染与输血有密切关系。50例HBV标志物阴性的健康献血员抗-HCV阳性率为6%。  相似文献   
5.
The prevalence of hepatitis C virus (HCV) infection was studied prospectively in pregnant women in France and their children by detection of anti-HCV with second-generation ELISA (ELISA2). In ELISA2-positive women, anti-HCV was detected with second- and third-generation RIBA (RIBA2 and RIBA3) and serum HCV RNA was detected with PCR. Among 670 women, anti-HIV1-negative, 26 (3.9%) were positive with ELISA2. RIBA2 was positive in 13 and HCV RNA was found in 10. Ten ELISA2-positive women had a further evaluation with assessment of HCV infection in their children. Among the 10 children born to the index pregnancy, only one was positive with ELISA2 and RIBA2 but negative with RIBA3 and PCR; the nine other children were ELISA2, RIBA2, RIBA3, and PCR negative. All 26 siblings (2–16 years old), of whom 14 were born to PCR-positive mothers, were ELISA2 and RIBA2 negative. We conclude that among anti-HIV1-negative pregnant women with normal serum ALT levels, the prevalence of HCV infection is relatively high but the risk for mother-to-infant transmission of HCV seems to be low.  相似文献   
6.
ABSTRACT— Thirty-nine of 61 prospectively followed patients who had had acute non-A, non-B hepatitis in 1978 were clinically reexamined in 1991 and tested for antibodies to hepatitis C virus (anti-HCV) with a second generation ELISA and RIBA and for HCV RNA by PCR. Acute hepatitis C was diagnosed in stored sera from 1978 in 24 patients, who were found still to be anti-HCV positive in 1991, and 16 of them were also HCV RNA positive. The majority of anti-HCV positive patients with or without HCV RNA had elevated serum ALT levels 13 years after onset of their acute hepatitis C. After 13 years follow-up, 1.6% of the patients had died of end-stage liver disease, 8% of anti-HCV positive patients had histologically confirmed liver cirrhosis, 79% of anti-HCV positive patients were judged to have chronic infection, whereas 21% seemed to have recovered. To conclude, we found that a majority of our patients with acute symptomatic hepatitis C continued to be viraemic 13 years after onset of hepatitis C, and that all continued to be anti-HCV positive by second-generation ELISA.  相似文献   
7.
Spread of hepatitis C virus infection within families   总被引:4,自引:0,他引:4  
In 1995, the intrafamilial spread of hepatitis C virus (HCV) was evaluated among 1379 household contacts of 585 HCV antibody-positive HCV RNA-positive subjects (index cases) in Italy. All index cases were patients with histologically proven chronic liver disease. The presence of antibodies to HCV (anti-HCV) was assessed by third-generation enzyme-linked immunosorbent assay (ELISA); the polymerase chain reaction (PCR) was used to test for HCV RNA. The overall anti-HCV prevalence among household contacts of index cases was 7.3% (101/1379); it was 15.6% in spouses and 3.2% in other relatives ( P <0.05; odds ratio (OR), 6.5; 95% confidence interval (CI), 3.5–8.6). Spouses married to index cases for longer than 20 years had a significantly higher anti-HCV prevalence than those married 20 years or less (19.8% vs 8.0%; P <0.05; OR, 2.8; 95% CI, 1.5–5.3). Parenteral risk factors were more likely to be reported in anti-HCV positive than in anti-HCV negative household contacts. After adjustment for confounders by multiple logistic regression analysis, age greater than 45 years (OR, 3.1; 95% CI, 1.6–5.3) and any parenteral exposure (OR, 3.7; 95% CI, 1.7–8.1), were the only independent predictors of the likelihood of anti-HCV positivity among household contacts. Spouses versus other relatives and length of marriage were both no longer associated. These findings suggest that sexual transmission does not seem to play a role in the intrafamilial spread of HCV infection.  相似文献   
8.
目的探讨抗-HCVELISAS/CO比值与抗-HCV免疫印迹法(RIBA)确证试验阳性的相关性。方法分别采用进口和国产试剂同时筛查34504例无偿献血者血液,结果有反应性标本用RIBA确证试剂进行确证,分析两种ELISA试剂有反应性S/CO阈值及其对确证试验阳性结果的预测率。结果 34504例标本中抗-HCV有反应性92例。国产试剂筛查出有反应性57例,经RIBA确证阳性30例,其中S/CO≥10.0的RIBA确证阳性率96.70%(29/30)明显高于S/CO〈10.0的3.70%(1/27),两者差异有统计学意义(χ2=45.60,P〈0.0001);进口试剂有反应性71例,经RIBA确证阳性31例,其中S/CO≥4.0的RIBA确证阳性率96.80%(30/31)明显高于S/CO〈4.0的2.50%(1/40),两者差异有统计学意义(χ2=60.36,P〈0.0001)。两种试剂同时有反应性标本36例,经RIBA确证阳性30例。结论抗-HCVELISAS/CO比值与确证试验阳性有一定的相关性,通过S/CO比值可以预测抗-HCV阳性。  相似文献   
9.
目的:探讨丙型肝炎(丙肝)患者感染途径与其肝脏病变程度的关系。方法:根据感染途径的不同将210例丙肝患者分输血后丙肝(PTHC组)102例和散发性丙肝(SHC组)108例,应用荧光定量聚合酶链反应(FQ-PCR)技术、酶联免疫吸附方法(ELISA)和自动生化速率法分别检测两组患者血清中HCV RNA含量、抗-HCV及ALT水平。结果:PTHC组HCV RNA阳性率和ALT的异常率均显著高于SHC组(χ2=23.39,P<0.01和χ2=13.73,P<0.01);HCV RNA阳性患者中,PTHC组的HCV DNA含量均值显著高于SHC组(t=4.29,P<0.01);ALT异常患者中,PTHC组的ALT水平均值显著高于SHC组(t=4.30,P<0.01)。HCV RNA的含量与ALT水平呈正相关(r=0.794,P<0.01)。结论:PTHC组患者病毒血症水平和肝脏功能损害的程度均显著高于SHC组,HCV不同的感染途径可导致患者不同的感染结果。  相似文献   
10.
SUMMARY. To determine the predictive value of IgM anti-hepatitis C virus (HCV) testing in patients with chronic hepatitis C infections undergoing interferon-α (IFN-α) therapy, IgM anti-HCV reactivity was analysed by two different methods (non-commercial and commercial) in 19 patients and monitored at times 0 (pre-treatment), 3, 6, 12. and 24 months during follow-up. Eight patients were non-responders, five remained in sustained response 1 year after stopping treatment, and six had a relapse. No correlation between alanine transaminase (ALT) levels and IgM anti-HCV reactivity was found by either method in baseline samples. In addition, neither the presence nor absence of IgM anti-HCV in baseline samples, nor the loss of specific IgM reactivity during treatment, had any predictive value. Finally, no other parameters analysed (age, sex, risk group and histological diagnosis), were significantly associated with IgM anti-HCV reactivity in our study. In summary, these results suggest that baseline detection and monitoring of IgM anti-HCV reactivity are not useful in predicting the sustained response to IFN-α therapy in chronic hepatitis C infection.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号