Parasitic diseases are caused by parasites. 寄生生物引起的
adjective [原级]寄生的(等于 parasitical)
Rickettsia is a bacterium which can cause many diseases that are transmitted by blood-sucking parasitic arthropods. 立克次氏体是一种细菌,这种细菌可引起多种疾病,并通过吸血节肢寄生动物传播。
...a parasitic new middle class of consultants and experts. …由顾问和专家组成的新的寄生性的中产阶级。
Immediately relevant to game theory are the sex ratios in certain parasitic wasp species that have a large excess of females. 与博弈论直接相关的是某些具有大量过剩雌性的寄生蜂种类的性别比例。