洞庭湖区溃垸前后血吸虫病流行区螺情变化分析

目的 了解洪涝灾害对血吸虫病流行区螺情的影响程度。方法 选择遭受过严重洪涝灾害且溃垸的 8个围垸 ,回顾性调查围垸受灾前后螺情及灭螺等情况。结果 8个被调查溃垸中 ,除 2个围垸垸内受灾后未发现钉螺外 ,其他 6个垸垸内受灾后钉螺面积均有不同程度的扩大 ,钉螺总面积是受灾前的 10 8倍 ,其中围堤湖垸受灾前垸内无螺 ,灾后发现了钉螺。受灾后垸内活螺平均密度、垸外阳性螺平均密度和钉螺阳性率在大部分溃垸比受灾前均有不同程度的降低。结论 洪涝灾害能引起大部分溃垸垸内钉螺不同程度的扩散以及能降低部分溃决堤垸垸外的阳性螺平均密度和钉螺阳性率。钉螺是否扩散及其扩散程度受诸如决口处是否有钉螺分布、活螺密度、水淹面积、泥沙覆盖面积等因素的影响。

Risk factors for post-hepatectomy liver dysfunction in primary liver cancer patients with concurrent hepatic schistosomiasis and chronic hepatitis

Objective:The purpose of this study was to analyze risk factors for development of post-hepatectomy liver dysfunction in primary liver cancer(PLC)patients with concurrent hepatic schistosomiasis and chronic hepatitis.Methods:A retrospective analysis of 73 PLC patients with concurrent hepatic schistosomiasis and chronic hepatitis,of which 16 patients developed liver dysfunction(persistent ascites or pleural effusion or occurrence of liver-related potentially fatal complications)following hepatectomy,was performed.After clinical characteristics were recorded,preoperative liver function parameters and surgery-related parameters in these patients were assessed.Seventeen potential risk factors for post-hepatectomy liver dysfunction were identified.The association between these potential risk factors and post-hepatectomy liver dysfunction then was analyzed.Results:Univariate analysis showed that liver cirrhosis,intraoperative blood loss,and preoperative total bilirubin were associated with the development of post-hepatectomy liver dysfunction.Multivariate logistic regression analysis of these three factors revealed that intraoperative blood loss≥600 mL and cirrhosis were two independent risk factors for post-hepatectomy liver dysfunction in PLC patients with concurrent hepatic schistosomiasis and chronic hepatitis.Conclusion:Keeping intraoperative blood loss below 600 mL can help avoid the development of post-hepatectomy liver dysfunction in liver cancer patients with concurrent hepatic schistosomiasis and chronic hepatitis.For patients with concomitant liver cirrhosis,every effort should be made to minimize potential liver function impairment induced by other adverse factors.

Mechanisms and Techniques of Agroforestry Ecosystem on Snail Control and Schistosomiasis Prevention

Schistosomiasis, an important parasitic disease, is severely harmful to human heath in China . The beach along the Yangtze River is a important habitat of snail that is Schistosomiasis＇s only intermediate host. program of afforesting for wiping out snail（Oncomelania hupensisi） and Schistosomiasis, comprehensive administration and exploitation of the three kinds of beaches proposed by Peng Zhenhna and Jiang Zehui is a pioneering.work hased on the ecological and economic theory. The development process of forestry for snail control and Schistosomiasis prevention is reviewed, and mechanisms and major afforesting techniques are summarized in this paper.