Strongyloidiasis is an intestinal parasitosis found in tropical and subtropical areas, where the warm climates are suitable for parasite survival (Barr, 1978). It is a common cause of morbidity and mortality, particularly in developing countries, and infects over one-quarter of the world’s population (Genta, 1989). Approximately 52 species are known to infect mammals, birds, reptiles and amphibians (Speare, 1989). The most common globally distributed human pathogen of clinical importance is Strongyloides stercoralis (Schad, 1989). Another species, Strongyloides fuelleborni, is a zoonotic parasite that infects primates and is found sporadically in humans in Africa (Pampiglione & Ricciardi, 1972). S. stercoralis is a ubiquitous soil-transmitted intestinal nematode that was first reported in 1876 in French soldiers working in Vietnam. It is unique among helminths in that it completes its life cycle inside a single human host. A unique feature of strongyloidiasis is the ability of the parasite to autoinfect the host, which makes S. stercoralis a significant public health problem (Grove, 1989).