ABSTRACT
Trichuriasis is more common in areas with tropical weather such as Asia, Sub-Sarahan Mrica and the Americas, particularly in impoverished regions of the Caribbean. It is also more common in poor rural communities and areas that lack proper sanitary facilities with easily contaminated food and water. A large number of individuals who are infected actually harbor fewer than 20 worms and are asymptomatic; those with a larger burden of infection (greater than 200 worms) are most likely to develop clinical disease. School age children tend to be most heavily infected.
