浅析猪气喘病的临床症状及防治方法     

黄建军 《兽医导刊》2016,(16):168-168

猪气喘病产生的原因是猪支原体感染，又称猪支原体肺炎、霉形体肺炎，在世界各地广泛流行，不同性别、品种、年龄的猪都可感染，给养殖户和养殖场带来了巨大的经济损失。文章主要针对该病发生的原因提出了一些治疗方法和防治措施，供广大兽医工作者和养殖户参考。  相似文献   

Characterization of multidrug resistant Salmonella recovered from diseased animals     

Zhao S  McDermott PF  White DG  Qaiyumi S  Friedman SL  Abbott JW  Glenn A  Ayers SL  Post KW  Fales WH  Wilson RB  Reggiardo C  Walker RD 《Veterinary microbiology》2007,123(1-3):122-132

Three hundred and eighty Salmonella isolates recovered from animal diagnostic samples obtained from four state veterinary diagnostic laboratories (AZ, NC, MO, and TN) between 2002 and 2003 were tested for antimicrobial susceptibilities and further characterized for bla(CMY) beta-lactamase genes, class 1 integrons and genetic relatedness using PFGE. Forty-seven serovars were identified, the most common being S. Typhimurium (26%), S. Heidelberg (9%), S, Dublin (8%), S. Newport (8%), S. Derby (7%), and S. Choleraesuis (7%). Three hundred and thirteen (82%) isolates were resistant to at least one antimicrobial, and 265 (70%) to three or more antimicrobials. Resistance was most often observed to tetracycline (78%), followed by streptomycin (73%), sulfamethoxazole (68%), and ampicillin (54%), and to a lesser extent chloramphenicol (37%), kanamycin (37%), amoxicillin-clavulanic acid (20%), and ceftiofur (17%). With regards to animal of origin, swine Salmonella isolates displayed the highest rate of resistance, being resistant to at least one antimicrobial (92%), followed by those recovered from turkey (91%), cattle (77%), chicken (68%), and equine (20%). Serovars commonly showing multidrug resistance (MDR) to > or =9 antimicrobials were S. Uganda (100%), S. Agona (79%), and S. Newport (62%), compared to S. Heidelberg (11%) and S. Typhimurium (7%). Class-1 integrons were detected in 43% of all isolates, and were found to contain aadA, aadB, dhfr, cmlA and sat1 gene cassettes alone or in various combinations. All ceftiofur resistant isolates (n=66) carried the bla(CMY) beta-lactamase gene. A total of 230 PFGE patterns were generated among the 380 isolates tested using XbaI, indicating extensive genetic diversity across recovered Salmonella serovars, however, several MDR clones were repeatedly recovered from different diseased animals.  相似文献   

变螺距诱导轮流场的数值模拟   总被引：2，自引：0，他引：2  

孔繁余  吕毅  黄建军  孙建 《农业机械学报》2007,38(10):45-48

在泵叶轮进口前置变螺距诱导轮能有效地提高泵机组的抗汽蚀性能。基于CFD技术,采用Fluent软件对变螺距诱导轮进行几何建模、选定边界条件等,数值模拟计算其内部流场。结合变螺距诱导轮的实例,给出了变螺距诱导轮内部速度与压力的分布情况以及粒子流动迹线图,得到了其内部流场的主要特征。  相似文献   

城乡融合背景下农民增收的对策研究     

黄建军 《农业科技与信息》2022,(24):104-107

目前我国农村居民收入最主要的来源是农业生产,其财产性收入在农民收入占比中不大,具有较高的增长空间以及潜力。要实现农业现代化建设,必须要重点考虑提高农民经济收入,同时也是实现民族复兴的基础。本文基于对全国农业发展基本情况的分析,进一步结合国内农村地区居民收入的实际现状问题进行研究,并根据我国城乡融合发展主要要求,为突破当前农民收入增长瓶颈,探索出提升农民收入的有效对策,以实现我国农民收入能够快速、稳定、持续的增长,进而促进全国农村实现现代化发展。  相似文献   

Comparison of the chemical constituents of aged pu-erh tea, ripened pu-erh tea, and other teas using HPLC-DAD-ESI-MSn     

Zhang L  Li N  Ma ZZ  Tu PF 《Journal of agricultural and food chemistry》2011,59(16):8754-8760

Pu-erh tea is a popular beverage in southwestern China and South Asian countries. To explain the differences of aged pu-erh tea and ripened pu-erh tea, the chemical constituents of these teas were identified by HPLC-DAD-ESI-MS(n). In addition, HPLC was used to determine the contents of the major polyphenols, gallic acid, caffeine, and theobromine, in various types of teas. These results showed that the majority of chemical constituents in ripened pu-erh tea and aged pu-erh tea were similar, but the contents of catechins and gallic acid presented significant differences between these two teas. After fermentation by microorganism, the levels of catechins in ripened pu-erh tea were decreased, but the contents of gallic acid and caffeine were conversely elevated compared with aged pu-erh tea.  相似文献   

玉米不同耐密植品种茎秆穿刺强度的变化特征   总被引：17，自引：1，他引：17  

勾玲  黄建军  孙锐  丁在松  董志强  赵明 《农业工程学报》2010,26(11):156-162

以耐密抗倒性不同的品种（稀植大穗品种JK 518和JK 519、耐密抗倒品种XY335和CS 1;中等耐密品种ND 108）为材料,设5个密度处理,研究玉米茎秆的穿刺强度（RPS）的变化特点及其对群体种植密度的响应。结果表明玉米茎秆穿刺强度随生育期递进而增强,不同耐密性品种间随种植密度变化有较大差异。茎秆基部节间的穿刺强度随群体密度增加呈线性递减。茎秆节间RPS随着节位的上升而呈二次函数递减;不同耐密性品种间RPS以抽雄-吐丝期差异明显,以穗位以下节间,尤其第3～6节间表现差异较大。玉米抽雄前茎壁增厚早、  相似文献   

环翠楼高丽红参与韩国产高丽红参中人参皂苷含量的比较分析     

黄建军  高晖富  姜志辉  姜丽萍  张瑞瑞  李兴祝  张倩  张崇禧 《人参研究》2017,(2):14-16

目的测定环翠楼高丽红参与韩国产高丽红参中人参皂苷的含量。方法采用HPLC色谱法和比色法。结果人参皂苷的含量分别为环翠楼高丽红参:人参皂苷-Rg3含量为0.039 6 mg/g,人参皂苷-Rh2含量为0.021 6 mg/g,总皂苷含量为3.02%(g/g);韩国产高丽红参:人参皂苷-Rg3含量为0.038 9 mg/g,人参皂苷-Rh2含量为0.020 8 mg/g,总皂苷含量为2.98%(g/g)。结论环翠楼高丽红参与韩国产高丽红参中人参皂苷-Rg3、人参皂苷Rh2和总皂苷含量相近;该方法分离效果好、准确、快速、样品制备简单。  相似文献   

综合利用森林资源     

Ffol.  PF  项玉章 《山西水土保持科技》1989,(2):43-47

  相似文献   

联合收割机三大自行熄火故障的原因     

黄建军 《农村百事通》2011,(13)

  相似文献   

猪病的简易鉴别及治疗方法     

黄建军 《养殖技术顾问》2011,(3):118-119

1简易鉴别 呼吸观察法，即健康猪正常呼吸每分钟10-0次；如果腹式呼吸过快或过慢则不正常。  相似文献