首页 > 文献资料
-
The mites found in stored food and house comprise a large group of subclass Acari, belonging to the suborder Acardida of the order Acarifornes. They can be found in dust and vacuum samples from floors, furniture, mattresses, Chinese herbal medicine, dry fruit, grain, flour, sugar, and bedding. These mites are nidicolous and feed on organic debris, including sloughed human skin, fungi, spilled food, pollen, etc. These mites are particularly prevalent in Chinese herbal medicine, dry fruit, grain, flour, sugar, beds, though carpeted floors near beds or couches may also have large numbers. The most common species are Acarus siro, Tyrophagus putrescentiae , Dermatophagoides farinae , D . pteronyssinus, Glycyphagus domesticus, G. Ornatus, Carpoglyphus lactis and Tarsonemus granarius, etc. The viability of mites in storage is quite strong and they can invade and parasitize the intestines of humans[1 -15]. They can cause pulmonary acariasis[16-25] , urinary acariasis[26-33] and so on. The dejecta of mites is a quite strong allergen and can cause different allergic diseases[34-44]. Intestinal acariasis can be caused by some mites related to the way of diet intake and invading against intestinal mucosa, intestinal muscle[45-5a]. The first report of intestinal acariasis caused by these mites was made by Hinman et al (1934)[45]. From then on, all kinds of studies on the disease have been reported gradually. In order to make an epidemiological survey of intestinal acariasis the investigation of the disease was taken in some areas of Anhui Province from 1989 to 1996.
-
酒精室间隔消融术与肥厚型心肌病
大多数的肥厚型心肌病患者左心症状是由于流出道梗阻所致,内科治疗能缓解其症状.少数患者内科治疗后,仍有症状,传统上,这些患者可接受室间隔切除术缓解流出道梗阻.由于手术仅限于几个有经验的中心,药物难治性的患者多采用经皮消融疗法解除梗阻、缓解症状.
-
精神医学中的生物统计学(10):进行临床试验时对缺失数据的预防和处理
1.IntroductionThis paper is the second in a 3-part series focusing on missing data.In a clinical study missing data can occur for various reasons, with or without any actual loss of study participants because of drop-outs.Poorly designed assessment schedules or use of inefficient data collection tools can result in missed visits or omissions of questions and, thus, missing data.
-
精神医学中的生物统计学(9):从研究设计角度考虑如何避免数据缺失以及由此带来的问题
One of the most common challenges in biomedical and psychosocial research is missing data, which occurs when respondents refuse to provide answers to sensitive questions and when study subjects are lost to follow-up during the repeated assessments of longitudinal trials.This paper is the first in a 3-part series focusing on this important topic; it describes different types of missing data and their differential effects on model estimates, focusing on study design strategies that can be used to prevent or minimize missing data and, thus, maintain the scientific integrity of the research.The second paper in the series will discuss implementation strategies to manage and reduce missing data while conducting the study, and the third paper will discuss analytic strategies for dealing with missing data after completion of data collection.
-
CT机数据显示产生误差的分析
故障现象:CT机启动后扫描马上中断,操作台报出错误信息:B AD DATA COLLECTION ERROR ERROR CODE=237 分析:问题出现在数据收集部分,使用SUDS检测程序检测,结果如下: