During the 70 years since the People's Republic of China was established in 1949,the country has made great achievements in transportation con-struction.In addition,China has also success-fully carried out a numbe...During the 70 years since the People's Republic of China was established in 1949,the country has made great achievements in transportation con-struction.In addition,China has also success-fully carried out a number of international cooperationprojectsonrailwaydevelopment.In Africa,China has played a crucial role in improving its transport system,giving a much-needed boost to the continent's efforts to achieve regional integration.A major part of it is the increase of Chinese-built railway lines traversing the continent.展开更多
Seasonal outbreaks of airsacculitis in China＇s poultry cause great economic losses annually. This study tried to unveil the potential role of Avian metopneumovirus （AM PV）, Ornithobacterium rhinotrocheale （aRT） a...Seasonal outbreaks of airsacculitis in China＇s poultry cause great economic losses annually. This study tried to unveil the potential role of Avian metopneumovirus （AM PV）, Ornithobacterium rhinotrocheale （aRT） and Chlarnydia psittaci （CPS） in avian airsacculitis. A serological investigation of 673 breeder chickens and a case-controlled study of 430 birds were undertaken. Results showed that infection with AMPV, aRT, and CPS was highly associated with the disease. The correlation between AMPV and CPS were positively robust in both layers and broilers. Finally, we determined the co-infection with AMPV, aRT, and CPS was prevalent in the sampled poultry farms suffering from respiratory diseases and the outbreak of airsacculitis was closely related to simultaneous exposure to all three agents.展开更多
Hebei Xinli Import&Export Trading Co.,Ltd.is company cooperated with many factories,specially works in tractor and construction machinery driver seat and vehicle parts,his main works,covers an area of 28,000 squar...Hebei Xinli Import&Export Trading Co.,Ltd.is company cooperated with many factories,specially works in tractor and construction machinery driver seat and vehicle parts,his main works,covers an area of 28,000 square meters,has a modern building area of 15,000 square meters,with the annual production capacity of 300,000 sets of seats.展开更多
The study was to determine the appropriate dose and administration route of Ornitin Triple vaccine in cross-breed coloured broilers in Vietnam by evaluating the antibody titer against Ornithobacterium rhinotracheale(O...The study was to determine the appropriate dose and administration route of Ornitin Triple vaccine in cross-breed coloured broilers in Vietnam by evaluating the antibody titer against Ornithobacterium rhinotracheale(ORT)and local reactions at injection sites on chickens after vaccination.The study was divided into 2 trials.Both trials were designed with 3 vaccine dose groups:0.0ml(control group),0.25ml and 0.5ml and 2 different administration routes:subcutaneous at neck(SC)and intramuscular at breast(IM)injection.The result showed that,no statistically significant difference was found between antibody titer of two administration routes as well as 2 vaccine doses until 13-week-old.Local reactions at the injection sites of IM route was less severe than SC at neck and in higher dose would produce a more severe swelling reaction.Daily weight gain was found to have a slight decrease in the vaccinated groups within 2 weeks after vaccination,however,no statistically significant difference was found in later stage(P>0.05).In conclusion,Ornitin Triple can be used to vaccinate by IM with the dose of 0.25ml for coloured broilers at early age(3-week-old),or 0.5ml for older birds and should be careful for some reactions at the injection sites.展开更多
文摘During the 70 years since the People's Republic of China was established in 1949,the country has made great achievements in transportation con-struction.In addition,China has also success-fully carried out a number of international cooperationprojectsonrailwaydevelopment.In Africa,China has played a crucial role in improving its transport system,giving a much-needed boost to the continent's efforts to achieve regional integration.A major part of it is the increase of Chinese-built railway lines traversing the continent.
基金supported in part by the Ministry of Science and Technology(MoST),China under Grant No.2016YFE0127100 and 2017YFD0500705-5(HE Cheng)supported by the State Key Laboratory of Veterinary Etiological Biology,Lanzhou Veterinary Research Institute,Chinese Academy of Agricultural Sciences+1 种基金Supported by Beijing Natural Science Foundation[No.6172019]partially funded by Taishan Scholar Project No.ts201511084
文摘Seasonal outbreaks of airsacculitis in China＇s poultry cause great economic losses annually. This study tried to unveil the potential role of Avian metopneumovirus （AM PV）, Ornithobacterium rhinotrocheale （aRT） and Chlarnydia psittaci （CPS） in avian airsacculitis. A serological investigation of 673 breeder chickens and a case-controlled study of 430 birds were undertaken. Results showed that infection with AMPV, aRT, and CPS was highly associated with the disease. The correlation between AMPV and CPS were positively robust in both layers and broilers. Finally, we determined the co-infection with AMPV, aRT, and CPS was prevalent in the sampled poultry farms suffering from respiratory diseases and the outbreak of airsacculitis was closely related to simultaneous exposure to all three agents.
文摘Hebei Xinli Import&Export Trading Co.,Ltd.is company cooperated with many factories,specially works in tractor and construction machinery driver seat and vehicle parts,his main works,covers an area of 28,000 square meters,has a modern building area of 15,000 square meters,with the annual production capacity of 300,000 sets of seats.
文摘The study was to determine the appropriate dose and administration route of Ornitin Triple vaccine in cross-breed coloured broilers in Vietnam by evaluating the antibody titer against Ornithobacterium rhinotracheale(ORT)and local reactions at injection sites on chickens after vaccination.The study was divided into 2 trials.Both trials were designed with 3 vaccine dose groups:0.0ml(control group),0.25ml and 0.5ml and 2 different administration routes:subcutaneous at neck(SC)and intramuscular at breast(IM)injection.The result showed that,no statistically significant difference was found between antibody titer of two administration routes as well as 2 vaccine doses until 13-week-old.Local reactions at the injection sites of IM route was less severe than SC at neck and in higher dose would produce a more severe swelling reaction.Daily weight gain was found to have a slight decrease in the vaccinated groups within 2 weeks after vaccination,however,no statistically significant difference was found in later stage(P>0.05).In conclusion,Ornitin Triple can be used to vaccinate by IM with the dose of 0.25ml for coloured broilers at early age(3-week-old),or 0.5ml for older birds and should be careful for some reactions at the injection sites.
