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.
A mist filled valley. A mist filled valley. The definition of a valley is a stretch of low land between two mountain or hill ranges.An example of a valley is the San Fernando area in southern California which is circled by the Transverse Ranges. mist filled valley. A mist filled valley. The definition of a valley is a stretch of low land between two mountain or hill ranges.