REFERENCES
- Amin, M. A., Fenwick, A., Teesdale, C. H., McLaren, M., Marshall, T. F. D. de C. & Vaughan, J. P. (1982). The assessment of a large snail control programme over a 3 year period in the Gezira irrigated area of the Sudan. Annals of Tropical Medicine and Parasitology, 76, 415–424.
- Bartholomew, R. K., Peters, P. A. & Jordan, P. (1981). S. mansoni in St. Lucian and Kenyan communities—a comparative study using the Kato stool examination technique. Annals of Tropical Medicine and Parasitology, 75, 401–405.
- Bundy, D. A. P. (1990). Is hookworm just another geohelminth? In Hookworm Disease, eds. Schad, G. A. & Warren, K. S. pp. 147–164. London: Taylor & Francis.
- El Tayeb, M., Daffalla, A. A., Kardaman, M. W., See, R. & Fenwick, A. (1988). Praziquantel and oltipraz: the treatment of schoolchildren infected with Schistosoma mansoni and/or S. haematobium in the Gezira, Sudan. Annals of Tropical Medicine and Parasitology, 82, 53–57.
- Greany, W. H. (1952). Schistosomiasis in the Gezira irrigated area of the Anglo-Egyptian Sudan. 1. Public health and field aspects. Annals of Tropical Medicine and Parasitology, 46, 250–267.
- Heinz, H. J. (1961). Factors governing the survival of bushmen worm parasites in the Kalahari. South African Journal of Science, 57, 207–213.
- Jones, T. C. (1987). Common intestinal parasites. In Medical Care of Refugees, eds. Sandler, R. & Jones, T. C. pp. 377–381. Oxford: Oxford University Press.
- Kardaman, M. W., Fenwick, A., Eligail, A. B., El Tayeb, M., Bennett, J. L. & Daffalla, A. A. (1985). Field trials with Oltipraz against S. mansoni in the Gezira irrigated area, Sudan. Journal of Tropical Medicine and Hygiene, 88, 95–100.
- McCullogh, F. S. & Magendantz, M. (1974). An epidemiological investigation into S. mansoni transmission in Mwanza, Tanzania. Annals of Tropical Medicine and Parasitology, 68, 69–80.
- Pwalowski, Z. S. (1989). Epidemiology, prevention and control. In Strongyloidiasis, a Major Roundworm Infection of Man, ed. Grove, D. I. pp. 233–249. London: Taylor & Francis.
- Reckart, M. L., Plastino, J. & Carr, C. (1985). Health status of teenage schoolboys in eastern Sudan. East African Medical Journal, 62, 54–59.
- Steketee, R. W. & Mulholland, K. (1982). Primary care medicine in the refugee relief programme of E. Sudan. Disasters, 6, 176–182.
- Ukoli, F. M. (1984). Introduction to Parasitology in the Tropical Africa. Chichester: J. Wiley & Sons.
- Watson, J. M. (1960). Medical Helminthology. London: Balliere Tindall & Cox.
- World Health Organization (1985). Diagnostic techniques for intestinal parasitic infections (IPI) applicable to primary health care (PHC) services. WHO/PDP/85.2. Geneva: WHO.