Here we present the complete genomic sequence of the Chinese standard challenge strain (CSC) of duck enteritis virus (DEV), which was isolated in China in 1962. The DEV CSC genome is 162,131 bp long a
Streptococcus equi ssp. zooepidemicus (S. zooepidemicus, SEZ) is one ofthe common pathogens that can cause septicemia, meningitis, and mammitis in domesticated species. Identify the virulence factors
目的:对初步鉴定的牛种布鲁氏菌分离株(B.abortus 343)进行全面的生物学特性检定,为深入研究布鲁氏菌病提供参考菌株.方法:将B.abortus 343划线培养及梯度稀释,使其形成单个菌落,观察菌落形态.挑取单个菌落进行革兰氏染色和柯氏染色,观察其染色特点;分别接种1.5X106 CFU到含硫瑾(1:25000)或含碱性复红(1:25000)的TSA平板上,观察其生长状态;将接种有B.ab
Streptococcus suis serotype 2 was an important zoonotic pathogen.Phenotypic and genotypic characterization of S.suis 2 isolated from clinically healthy sows and diseased pigs in China remains largely
To explore the development of a vaccine against transmissible gastroenteritis virus (TGEV) infections,the gene coding for the TGEV protein(S) was inserted into the swinepox virus (SPV).We obtained a r
水土保持区划能够为治理水土流失提供重要基础工作.而省级范围及以下行政单位的区划还处于起步阶段,本文以统计年鉴为主要数据来源,针对广西壮族自治区水土流失特点及当地社会经济条件,选取自然要素、土地利用要素、社会经济要素、水土保持要素四个方面共25个指标作为水土保持区划指标.再利用主成分-系统聚类-空间叠置的方法进行广西水土保持区划,结合一级区初步区划和相关区划进行调整合并,最终得到广西水土保持区划.
Chicken pathogenic E.coli is endangering poultry industry severely in China and worldwide,and antibiotics therapy is facing an increasing problem of antibiotics resistance.Bacteriophages can kill bact
The outbreak of highly pathogenic porcine reproductive and respiratory syndrome (HP-PRRS) in 2006 devastated Chinese swine industry.Up to now,compared with classical strain of PRRSV,HP-PRRS virus (HP-
本文借助60年来的广西水土流失调查数据,阐明了广西水土流失变化趋势并分析其原因,从20世纪50年代到20世纪末,广西水土流失面积呈波动性变化,水土流失面积为10690.50~ 13564km2之间,占土地总面积的4.50~5.71%,水土资源与生态环境表现为"一边治理,一边破坏"的现象;2000年后,随着广西经济发展,人口增加,生产建设项目增多、毁林开荒以及山丘区农林开发,水土流失面积由2000年
本文通过对比云南省怒江流域1999、2004、2009年三次水土流失遥感调查结果,研究分析水土流失变化趋势,根据水土保持存在的问题,提出治理重点,为云南省怒江流域水土保持工作开展提供决策参考.