Egwunyenga, O.A. and Ataikiru, D.P. (2005) Soil-Transmitted Helminthiasis among School Age Children in Ethiope East Local Government Area, Delta State, Nigeria. African Journal of Biotechnology, 4, 938-941.
 Obiukwu, M.O., Umeanaeto, P.U., Eneanya, C.I. and Nworgu, G.O. (2008) Prevalence of Gastro-Intestinal Helminth in School Children in Mbaukwu, Anambra State, Nigeria. Annals of Tropical Medicine and Parasitology, 101, 705-713.
 Nematian, J., Nematian, E., Gholamrezanezhad, A. and Asgari, A.A. (2004) Prevalence of Intestinal Parasitic Infections and Their Relation with Socio-Economic Factors and Hygiene Habits in Tehran Primary School Students. Acta Tropica, 92, 179-186.
 Nwosu, A.B.C. (1981) The Community Ecology of Soil Transmitted Helminth Infections of Human in a Hyperendemic Area of Southern Nigeria. Annals of Tropical Medicine and Parasitology, 75, 197-203.
 Quihui-Cota, L., Valencia, M.E., Crompton, D.W.T., Phillips, S., Hagan, P., Diaz-Camacho, S.P., et al. (2004) Prevalence and Intensity of Intestinal Parasitic Infections in Relation to Nutritional Status in Mexican School Children. Transaction of the Royal Society of Tropical Medicine and Hygiene, 98, 653-659.
 Carvalho-Costa, F.A., Goncalves, A.Q., Lassance, S.L., Silva Neto, L.M., Salmazo, C.A.A. and Boi, M.N. (2007) Giardia lamblia and Other Intestinal Parasitic Infections and Their Relationships with Nutritional Status in Children in Brazilian Amazon. Revista do Instituto de Medicina Tropical de Sao Paulo, 49, 147-153.
 Nematian, J., Gholamrezanezhad, A. and Nematian, E. (2008) Giardiasis and Other Intestinal Parasitic Infections in Relation to Anthropometric Indicators of Malnutrition: A Large-Population-Based Survey of School Children in Tehran. Annals of Tropical Medicine and Parasitology, 102, 209-214.
 Silva, R.R., Mariano da Silva, C.A., Pereira, C.A.D., Nicolato, R.L., Negrao-Correa, D., Iamounier, J.A. and Carneiro, M. (2009) Association between Nutritional Status, Environmental and Socio-Economic Factors and Giardia lamblia Infections among Children Aged 6-7 Months in Brazil. Transaction of the Royal Society of Tropical Medicine and Hygiene, 103, 512-519.
 Casapia, M., Joseph, S.A., Nunez, C., Rahme, E. and Gyorkos, T.W. (2006) Parasite Risk Factors for Stunting in Grade 5 Students in a Community of Extreme Poverty in Peru. International Journal for Parasitology, 36, 741-747.
 Basu, A.K., Ahmed, M.I., Shingu, P.A. and Srivastava, G.C. (1994) A Comparative Study of the Different Solutions Used in the Diagnosis of Gastro Intestinal Helminth and Protozoa Infections. Bulletin of Animal Health and Production in Africa, 42, 37-39.
 Srikanth, R. and Naik, D. (2004) Prevalence of Giardiasis Due to Wastewater Reuse for Agriculture in the Suburbs of Asmara City, Eritrea. International Journal of Environmental Health Research, 14, 43-52.
 Khan, M.Y. (1979) An Analytical Study of Factors Related to Infestation by Intestinal Parasites in Rural School Children (Report of a Pilot Study). Public Health, 93, 82-88.
 Water and Sanitation Program (2007) Can Hygiene Be Cool and Fun: Insights from School Children in Senegal.
 Curtis, V. and Cairncross, S. (2003) Effect of Washing Hands with Soap on Diarrhoea Risk in the Community: A Systematic Review. The Lancet Infectious Diseases, 3, 275-281.