铁皮石斛试管苗快速繁殖的研究

兰科植物铁皮石斛(Dendrobium candidum Wall.ex Lind1.)的茎为常用名贵中药。多年来,主要依靠采收野生品种供药用和出口,致使野生资源枯竭,现已成为日益稀少的濒危植物。兰属种子和石斛属种子试管繁殖已积累不少资料,但是有关铁皮石斛种子试管繁殖的研究只有少量简单的报道,对其种子在试管繁殖过程中,所需外界条件的研究也不够     

荧光原位杂交技术分析人结肠菌群方法研究

建立荧光原位杂交技术分析人体内结肠菌群的方法。取受试者新鲜粪便 ,选用 5种特异性的 16SrRNA寡核苷酸探针 ,检测粪便样本收集后的保存时间、温度 ,离心条件及样本固定液存放时间对杂交计数结果的影响。结果建立最佳实验条件为 :粪便样本收集后应尽快在 4℃下保存 ,放置时间不要超过 12小时即作处理 ;样本的适宜离心条件为 70 0g 2分钟 ;样本用多聚甲醛固定后在 - 80℃下存放时间不要超过 5个月。该方法具有较好的稳定性 ,可以有效地检出个体之间结肠菌群的差异。     

The inter‐rater reliability between nurse‐assessors clinically assessing infection of chronic wounds using the WUWHS criteria

The aim of this study was to determine the inter‐rater reliability between one expert‐nurse and four clinical‐nurses who were asked to clinically assess infection of chronic wounds by using the World Union of Wound Healing Societies (WUWHS) criteria. A quasi‐experimental design was used to collect the data. In comparison to phase 1 in which ‘open questions’ were asked, in phase 2 a pre‐printed form (checklist) was introduced. In both phases, 55 chronic wounds were clinically assessed. For each WUWHS criterion the inter‐rater reliability of signs and symptoms was expressed by Cohens Kappa (κ). A substantial agreement (κ ≥ 0·6) was considered as adequate. In both phases pocketing (p < 0·02), and erythema (p < 0·004) scored statistically significant results. Phase 2 showed higher inter‐rater agreements compared with phase 1 (three substantial agreements (easily bleeding/friable granulation tissue, delayed healing, increasing exudate), an almost perfect‐ and a perfect agreement for malodour and pain, respectively. According to the results it can be concluded that the clinical assessment of infection of chronic wounds may be better supported by a pre‐printed form than making use of an ‘open questions’ form. To provide this with a higher level of evidence, there is need for more well conducted studies.     

Reaction or infection: topical chloramphenicol treatment

Chloramphenicol is a topical treatment that is used widely, especially in wounds around the eyes. In our practice there have been a number of cases of delayed hypersensitivity to chloramphenicol that has been mismanaged initially as an infective cellulitis. We hope to share some of our experience of this uncommon reaction to highlight the delayed reaction that can occur with topical application of this drug.     

Are quality of family life and disease severity related in childhood atopic dermatitis?

BACKGROUND: Atopic dermatitis (AD) can be traumatizing to family life. Little is known about the relationship between quality of life in AD and disease severity. OBJECTIVE: To document family quality of life and relate this to severity of AD in children, for a 6-month period from a given point in time. STUDY DESIGN: These data are part of a longitudinal study conducted in two parts of the UK to investigate risk factors for AD severity and its impact on quality of life. SUBJECTS: and methods Thetargetedpopulation comprised children with AD aged 5-10 years in a primary-care setting. The general practitioners identified potential subjects and the UK diagnostic criteria for AD were used to verify the diagnosis. Both the children and their parents were interviewed. Eczema severity was assessed using a modified form of the SCORAD (SCORe Atopic Dermatitis) Index (SCORAD-D) from which parents' score of itching and sleep loss were excluded. The quality of family life was quantified by the Dermatitis Family Impact (DFI) questionnaire. These two parameters were evaluated on two occasions 6 months apart. ANALYSIS: Multiple regression analysis was used to investigate the relationship between the quality of family life and the severity of the AD in the children, at a specific point in time and over the following 6-month period. RESULTS: Of the 116 children attending the first visit, mean age 8 years, 106 attended the second visit (91%) and were included in the analysis. Quality of family life was shown to be significantly affected in 48 (45%) cases at the first visit and 38 (36%) cases at the second visit. The initial means of the DFI and SCORAD-D were 2.4 and 8.2, respectively. Six months later the mean final DFI and SCORAD-D were 1.9 and 7.7, respectively. Using multiple regression on the first and second visits, each unit increase in SCORAD-D was associated with 0.21 [95% confidence interval (CI) 0.06-0.37 P = 0.008] and 0.37 (95% CI 0.15-0.59, P = 0.001) units increase in quality of family life, respectively. This relationship remained significant even after adjustment for potential confounders (black skin, social class, sex, child's age, family size and location) each unit increase in SCORAD-D led to a 0.25 unit (95% CI 0.11-0.4, P = 0.001) and 0.23 unit (95% CI 0.05-0.42, P = 0.014) increase in DFI on the first and second visits, respectively. Changes in the DFI scores were significantly related to changes in the SCORAD-D scores (regression coefficient; 0.17 (95% CI 0.06-0.29, P = 0.002). CONCLUSIONS: We show that quality of family life is related to the severity of AD in children. This confirms the importance of parental assessment of the impact of the disease in the management of AD, because the disease affects the entire family. Also, these results show the response of DFI to change predictably with disease severity. This may imply that the DFI questionnaire could be used as an extra measure of outcome in everyday clinical practice as well as in research studies.