传病媒介把致病微生物从一个宿主传到另一宿主的生物，如蚊子或虱蝇等 An organism, such as a mosquito or tick, that carries disease-causing microorganisms from one host to another.
寄生生物一种在另一有机体上生长并以该有机体维持生存或蔽护但对宿主的生存毫无益处的生物 An organism that grows, feeds, and is sheltered on or in a different organism while contributing nothing to the survival of its host.
