The treatment of soil infested with the human whipworm, Trichuris trichiura.

The soil fumigants methyl bromide, chloropircrin and Basamid or mixtures of Basamid and chloropicrin proved to be of no use in filling T. trichiura ova in soil. However, on untreated plots the eggs died at a rate such than only 20% of the ova remained viable after 18 months.