OBJECTIVE To study the risk factors and clinical characteristics of nosocomial infection in senile patients with acute myelogenous leukemia who received chemotherapy.METHODS Ninety-one cases of senile patients with acute myelogenous leukemia received 304 times of chemotherapy with etiological examination,to analyze the relationship between nosocomial infection and absolute neutrophil count in peripheral blood,the cellularity of the marrow and chronic systemic disorder.RESULTS All indicators of senile patients with acute myelogenous leukemia were higher than those of younger patients(P0.05).CONCLUSIONS Age,different stage of chemotherapy,the neutrocytopenia level and prolongation,and hypocellularity of bone marrow are related to the nosocomial infection in senile patients with acute myelogenous leukemia,and the chronic systemic disorder is not a risk factor.

Objective To investigate the subtype distribution and sequence characteristics of HIV-1 strains prevalent among sexual infectors in Beijing. Methods We collected the blood samples from 100HIV sexual infectors in Beijing during 2008 and separated plasma specimens. RNA was extracted from the plasma and the gag gene was amplified by RT-PCR and nest-PCR. The PCR products were sequenced directly and phylogenetic analyses of gag gene was performed using the MEGA4 software. Results Among 100 HIV-1 plasma samples,84 gag gene fragments were amplified and analyzed. Eight HIV subtypes including B(22 strains), B'(8 strains),C( 1 strain) ,CRF01_AE (38 strains) ,CRF02_AG (2 strains) ,CRF07_BC(9 strains) ,CRF08_BC(3 strains) and C/CRF01_AE recombinant like strain( 1 strain) were identified circulating in Beijing. Conclusion CRF01 _AE and subtype B were predominant in Beijing account for 45.2% and 26.2% and the surveillance of HIV gene variation should be paid more attention.

A double burden of overweight/obesity and malnutrition during childhood is a major concern in China. Dietary intakes in this critical period affect children's physical and cognitive development, and also have health consequences in later life. Therefore, establishing healthy eating habits that will endure is crucial for children. Nutrition education is an effective way in improving nutrition knowledge and attitudes, and healthy eating behaviors. Diverse forms of nutrition improvement programs that targeting children, family, teachers, and school settings have been conducted in many developed countries. However, due to the differences of genetic background, household environment as well as dietary patterns between Chinese children and children from other countries, the existing nutrition education programs for children abroad might not be appropriate for children in China. Thus, nutrition education programs that consider Chinese nutrition-related policies and food supply as well as the local educational resources are required for Chinese children. This review summarized nutrition-related policies and legislations in China and developed countries. A series of evidence-based nutrition education programs that combined educational strategies and environmental supports conducted in the Southwest China Childhood Nutrition and Growth Study were presented. These programs can serve as example models for adopting nutrition interventions to improve nutrition and health status of children in different regions of China.