Non-pathogenic intestinal protozoa are single-celled parasites. They do not harm the body, even in people with weak immune systems. They are found only in lumen (cavity) of the intestinal tract. A total of 603 houses were selected at random. About 200 children born in these houses between 15 January 1996 and 14 January 1997 were recruited within 3 weeks of birth for a community-based cohort study of diarrheal disease, which included weekly morbidity recall visits with stool specimen collection irrespective of whether the children had diarrhea or not. The children were monitored until 2 years of age or until the end of the study on 28 April 1998.
Prevention of the disease is by separating food and water from faeces and by proper sanitation measures. There is no vaccine. There are two treatment options depending on the location of the infection. If present in tissues is treated with either, nitazoxanide or chloroquine. Several non-pathogenic protozoa inhabit the intestinal. The non-pathogenic protozoa can be divided into two groups: amebae and flagellates. Protozoa are a diverse group of unicellular eukaryotic organisms, many of which are motile. They are restricted to moist or aquatic habitats. That can be flagellates, ciliates, and amoebas.