Bacteria-blocking effect of surgical gowns with new material / 中国感染控制杂志

Objective To study bacteria-blocking effect of surgical gowns with new material.Methods Semi-quantitative and qualitative testing methods were used to detect bacteria-blocking rates of key sites of surgical gowns(chest and forearm), the detected samples included sample A (composite material, unused), sample B (composite material, after washing 100 times), and sample C (monolayer material, unused).Results In semi-quantitative testing,the average bacteria-blocking rates of three samples were 75.47%, 70.78%, and 73.73% respectively.In qualitative testing,three samples could effectively block the penetration of Staphylococcus aureus under wet condition and Bacillus subtilis var.niger spores under dry condition.Conclusion In semi-quantitative testing, all three kinds of samples had bacteria-blocking effect, and the average bacteria-blocking rate was> 70%;in qualitative testing, three samples all meet requirements of bacteria-blocking effect under wet and dry condition.

Best harvest time of Platycodon grandiflorum A.DC from Changbai Mountains and its cluster analysis / 中成药

AIM: To research the development of the content of total saponin in Platycodon grandifloeum(Jacq.) A.DC.and Platycodon grandifloeum(Jacq.) A.DC.var.Hort so that the best harvest time was found. METHODS: Using the methods of cluster analysis and according to the examination method ruled in the 2005 version 〈The People's Republic of China Prarmacopoeia〉,the content of total saponin in Platycodon grandiflorum in different harvest time was compared. RESULTS: Platycodon grandifloeum(Jacq.) A.DC and Platycodongrandifloeum(Jacq.) A.DC.var.Hort respectively on September 20,September 30 are the largest yield and the largest content of total saponin in root,that time is the best harvest time. CONCLUSION: The method is simple,accurate and reliable.

EVALUATION ON DETECTION OF SHIGELLA CULTURES WITH THE DIAGNOSTIC TYPING PHAGE SET FOR ENTEROBACTERIACEAE / 微生物学通报

In this paper , 2280 strains of suspicious Shigella c culture were detected by the diagnostic typing phage set for Enterobacteriaceae, the routine identification of them were carried oat at the same time . The results showed that 100% of shigella cultures were lysed with 10~3RTD and 99.9% lysed with 1RTD of phage Sh. 12.3% of 65 non-shigeUa cultures agglutinating with typing serum of shigeUa was lysed with 10~3RTD, 4.6% lysed with 1RTD of phage Sh. The determination of lytic-pattern of 2215 shigella culture indicated that only 3 strains of Boyd 5 of lytic-pattern 3 were not reported in literature, the rest strains were consistent to fomer studies. The nonshigella cultures lysed by Sh 10~3RTD could be excluded with 1RTD and its lytic-pattern. 20 strains of Enteroinvasive Escherichia coli possessing shigeUa-related antigens could be differentiated by Sh 10~3RTD. 1RTD and its lytic-pattern.