The aggregated distribution pattern means that the flea individuals do not evenly distribute on rat host but gather as different size groups on rat individuals.
印鼠客蚤这种聚集型分布意味着该蚤的个体分布不均匀，而是在宿主动物体表形成大小不等的聚集蚤群。
2
Objective: To investigate the constituent of flea species, the dominant fleas and their spatial distribution patterns in the natural epidemic focus of wild-rat type of plague in Yunnan province.