Apparently healthy birds can be carriers and shed the infectious agent , particularly when subjected to stress through crowding and shipping 看似健康的雀鸟亦可能带菌，它们在挤迫环境或船运等过程中受压时，最易将病菌传播。
Apparently healthy birds can be carriers and shed the infectious agent , particularly when subjected to stress through crowding and shipping 看似健康的雀鸟亦可能带菌，它们在挤迫环境或船运等过程中受压时，最易将病菌传播。
A person or an animal that shows no symptoms of a disease but harbors the infectious agent of that disease and is capable of transmitting it to others 带菌者没有表现出疾病的症状但却携带这种疾病的传染因子并由此能够传播疾病的人或动物
Perfluorochemicals are cheap to produce and are completely free of biological materials , so there is no risk of infectious agents contaminating them 全氟化合物的生产成本低，并且由于是完全游离的生物物质，因此没有易传染物质污染它们的危险。
If too much of the cuticle is cut back during a manicure , the cuticle can be separated from the nail , and infectious agents can get into the exposed area 如果在修指甲期间要修剪很多表皮，皮肤就会和指甲分离，感染物就可以进入皮肤暴露的区域。
Biological weapons , by definition , are any infectious agent , such as a bacterium or virus , used deliberately to inflict harm on soldiers and civilians alike 从定义来看，生物武器是指任何蓄意用来伤害士兵和老百姓等的传染手段，如细菌或病毒等。
If pericarditis is suspected , the history should address exposure to infectious agents , connective tissue and immune diseases , and previous diagnosis of neoplasia 当怀疑有心包炎时，病史应注重感染原接触史，结缔组织和免疫性疾病史和以往的肿瘤诊断史。
Studies in human populations link cancer risk to infectious agents , such as human papillomairus ( cerical cancer ) and hepatitis b ( lier cancer ) ( 1970s and 1980s ) 在人群中研究传染病原与癌风险的关系,如人乳头瘤病毒(宫颈癌)和乙型肝炎病毒(肝癌) ( 70年代到80年代)
Studies in human populations link cancer risk to infectious agents , such as human papillomavirus ( cervical cancer ) and hepatitis b ( liver cancer ) ( 1970s and 1980s ) 在人群中研究传染病原与癌风险的关系,如人乳头瘤病毒(宫颈癌)和乙型肝炎病毒(肝癌) ( 70年代到80年代)
Even though deaths caused in the 1980s by accidental hiv infection mean that donated blood is now screened meticulously to keep it free of infectious agents , there is still a nagging feeling that something is wrong 尽管在经历了80年代爱滋病毒意外感染事件后，为防止感染但依然血液已经经过异常细致的检验与过滤但好象依然有些什么地方不对劲。
