[Characteristics and Sources of Microbial Aerosols in Urban and Mountainous Areas in Autumn and Winter in Xi'an, China].

To explore the bioaerosol composition characteristics and sources in urban areas and mountains, three sample sites were selected in urban (urban, suburban) and southern mountainous areas in Xi'an, and air, soil, and leaf samples were simultaneously collected. The fungi and bacteria community structures at different sampling sites were analyzed through a high-throughput sequencing method, and their spatio-temporal variations were also examined. Moreover, a source track technique was used to identify the source of microorganisms in the air. The results showed that the fungi and bacteria at different sampling sites were significantly different, indicating that the geographical location has a significant influence on the community structure of microorganisms in the air. In winter, more potential fungal pathogens and bacterial pathogens were detected in urban areas with high relative abundance and diversity. In addition, the results showed that the main local source of fungi and bacteria was the leaf surface, of which the contribution rate of bacteria in the air fine particles was up to (55±30)%. This study can provide a scientific basis for understanding the characteristics of microbial pollution in the atmosphere, and for air environment quality evaluation and disease prevention in China.

Eighty cases of chronic cholecystitis treated by oral administration of dan an tang.

OBJECTIVE: To evaluate the clinical therapeutic effects of dan an tang (chronic-cholecystitis-relieving decoction) for chronic cholecystitis. METHODS: The 160 cases of chronic cholecystitis were randomly divided into the treatment group (80 cases) and the control group (80 cases). The former was treated by oral administration of dan an tang (chronic-cholecystitis-Relieving Decoction), and the latter by oral administration of xiao yan li dan Pian (bile-draining anti-inflammatory tablet). RESULTS: The total effective rate of the treatment group and the control group was 95% and 80% respectively, showing a significant difference (P < 0.05). CONCLUSION: Dan an tang (chronic-cholecystitis-relieving decoction) was obviously effective for chronic cholecystitis.