天然宿主

作为NPV的天然宿主，家蚕与病毒的相互作用关系一直是众多研究者关心的问题。

As the natural host of NPV , the interaction of silkworm and virus attracts a lot of attention from all over the world .

迄今为止，关于AIV对天然宿主鸡致病机制的研究，仍停滞在组织和细胞水平。

Up to now , the research of the pathogenic mechanism of AIV in its natural host chicken is still limited to tissue and cell levels .

但是在乌黑色白睑猴，他们是HIV的天然宿主，极少发展为艾滋病，内毒素水平在他们体内根本就没有升高。

But in sooty mangabeys , which are natural hosts of primate HIV but rarely progress to AIDS , the endotoxin levels didn 't rise at all .

亚洲猿类特别是恒河猴是SV40的天然宿主。

The natural hosts for SV40 are species of Asian macaque monkeys , especially the rhesus ( Maccaca mulatta ) .

从动物中检出率分别为：猪2.56%、鸭21.70%、淡水鱼29.22%、观赏动物32.35%，证明Ps具有较广泛天然宿主。

Pigs Ps 2.56 % , ducks 21.70 % , fresh-water fishes 29.22 % , various animals in zoo 32.35 % . This study showed that Ps was widely distributed in natural hosts .

猪是此病的唯一天然宿主。

Pigs are the only natural hosts of this disease .

野生水鸟是A型流感病毒的天然宿主。

Wild waterfowl are considered the natural reservoir of all influenza A viruses .

非常引人注目的是，1996年发现果蝠（飞狐）是该病毒的天然宿主。

Remarkably , in1996 fruit bats ( flying foxes ) were found to be the natural host of the virus .

经确认，狐属狐蝠科的果蝠是这一病毒的天然宿主。

The natural host of the virus has been identified as being fruit bats of the Pteropodidae Family , Pteropus genus .

野生动物是多数自然界病原体的天然宿主，野生动物重大疫病和人类公共卫生问题息息相关。

Wildlife is the natural reservoir for most pathogens , and furthermore some important diseases in wildlife are closely linked to public health .

犬、猫科动物是本病的天然宿主，野生肉食动物、马属动物、海狸、猩猩、麝鼠、灵长类等偶见感染，还可以感染人类。

Dogs , cats are natural hosts of this parasite , the animals such as wild carnivores , horses , beavers , apes , muskrats , and other primates are infected incidentally .

正常情况下，由于长时间的进化，前病毒发生了突变不能合成蛋白，从而其天然宿主不致病。

Normally , with a long period of evolution for host , PERV proviral DNA in host cell mutated and thus can not synthesize protein , so the pig does not ill with PERV .

杨树生长周期短，离体操作容易，基因组相对较小，是根癌农杆菌的天然宿主，是研究木本植物分子生物学和林木基因工程的模式植物。

Poplar has many advantages , such as short growth periods , smaller genome , easier to propagate and operate and the natural host of Agrobacterium tumefaciens , so it is the model plants for the studies of tree molecular biology and forest genetic engineering .

再加上CAM是天然免疫缺陷宿主，并可耐受一定的温度变化，有利于检测某些对温度敏感的肿瘤细胞的生物学行为。

The CAM is natural immunocompromised host and can tolerant temperature changes , we can detect biology behavior of tumor cell that sensitive to temperature .

天然免疫系统是宿主抵抗病原微生物的第一道防线，也是获得性免疫的基础。

The innate immunity is the first line to defense against invading pathogens and is also essential for the subsequent adaptive immune response .