Children are most commonly infected. Estimated prevalence rates among children in various world regions are 4â28%. Ascariasis: Ascaris, or roundworm, infection is the common helminthic infection in humans, with an estimated worldwide prevalence of 1 billion. The causative organism, A lumbricoides, is cosmopolitan in distribution, being most abundant in tropical countries.
Definition of hollow. 1  1 : an unfilled space : cavity, hole in the hollow of a tree. 2  2 : a depressed or low part of a surface; especially : a small valley or basin.
In Chinese symbolism the valley is the yin, shadowy state, with the mountain as the yang and sunny state. In stories the valley has symbolized the peaceful and restful area reached after crossing the mountains and the deserts. A valley is the destination of the wagon trains of American western films.