Based on the previous bird and ecological environment survey and bird strike statistics of Chengdu Shuangliu International Airport, the author selected Long-tailed Shrike, one of the bird species causing the accident,...Based on the previous bird and ecological environment survey and bird strike statistics of Chengdu Shuangliu International Airport, the author selected Long-tailed Shrike, one of the bird species causing the accident, for stomach content analysis. The results showed that the feeding objects of Long-tailed Shrike were different in spring and summer, which was directly related to the seasonal food sources. However, they have something in common. The species that Long-tailed Shrike eats directly or indirectly in spring and summer are Carabidae, Columbidae, Muridae, Acridoidea, Cruciferae, Leguminosae, Moraceae, Gramineae, etc. These animal and plant species are widely distributed in the airport. We speculate that the plants and animals in the airport, as the food source of Long-tailed Shrike, to some extent attracted Long-tailed Shrike to come for food and activities. Therefore, we suggest to cut off the food source of brown-backed shrimps in the airport, such as turf management in the flight area, prevention and control of insects, soil animals and rodents, etc., so as to reduce the number of Long-tailed Shrike in the flight area and reduce its impact on flight safety.展开更多
Hepatitis B virus(HBV) infection has shown an intermediate or high endemicity level in low-income countries over the last five decades. In recent years, however, the incidence of acute hepatitis B and the prevalence o...Hepatitis B virus(HBV) infection has shown an intermediate or high endemicity level in low-income countries over the last five decades. In recent years, however, the incidence of acute hepatitis B and the prevalence of hepatitis B surface antigen chronic carriers have decreased in several countries because of the HBV universal vaccination programs started in the nineties. Some countries, however, are still unable to implement these programs, particularly in their hyperendemic rural areas. The diffusion of HBV infection is still wide in several low-income countries where the prevention, management and treatment of HBV infection are a heavy burden for the governments and healthcare authorities. Of note, the information on the HBV epidemiology is scanty in numerous eastern European and Latin-American countries. The studies on molecular epidemiology performed in some countries provide an important contribution for a more comprehensive knowledge of HBV epidemiology, and phylogenetic studies provide information on the impact of recent and older migratory flows.展开更多
AIM: To calculate the proportion of potentially preventable hospitalizations due to peptic ulcer disease (PUD), erosive gastritis (EG) or duodenitis (ED).
文摘Based on the previous bird and ecological environment survey and bird strike statistics of Chengdu Shuangliu International Airport, the author selected Long-tailed Shrike, one of the bird species causing the accident, for stomach content analysis. The results showed that the feeding objects of Long-tailed Shrike were different in spring and summer, which was directly related to the seasonal food sources. However, they have something in common. The species that Long-tailed Shrike eats directly or indirectly in spring and summer are Carabidae, Columbidae, Muridae, Acridoidea, Cruciferae, Leguminosae, Moraceae, Gramineae, etc. These animal and plant species are widely distributed in the airport. We speculate that the plants and animals in the airport, as the food source of Long-tailed Shrike, to some extent attracted Long-tailed Shrike to come for food and activities. Therefore, we suggest to cut off the food source of brown-backed shrimps in the airport, such as turf management in the flight area, prevention and control of insects, soil animals and rodents, etc., so as to reduce the number of Long-tailed Shrike in the flight area and reduce its impact on flight safety.
文摘Hepatitis B virus(HBV) infection has shown an intermediate or high endemicity level in low-income countries over the last five decades. In recent years, however, the incidence of acute hepatitis B and the prevalence of hepatitis B surface antigen chronic carriers have decreased in several countries because of the HBV universal vaccination programs started in the nineties. Some countries, however, are still unable to implement these programs, particularly in their hyperendemic rural areas. The diffusion of HBV infection is still wide in several low-income countries where the prevention, management and treatment of HBV infection are a heavy burden for the governments and healthcare authorities. Of note, the information on the HBV epidemiology is scanty in numerous eastern European and Latin-American countries. The studies on molecular epidemiology performed in some countries provide an important contribution for a more comprehensive knowledge of HBV epidemiology, and phylogenetic studies provide information on the impact of recent and older migratory flows.
文摘AIM: To calculate the proportion of potentially preventable hospitalizations due to peptic ulcer disease (PUD), erosive gastritis (EG) or duodenitis (ED).
