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In order to estimate the proportion of hookworm infections represented by Necator americanus and Ancylostoma duodenale, the 2 major species of human hookworms in Nigeria, stool samples from 1253 hookworm-positive schoolchildren were cultured to the third-stage (L3), filariform larvae, using the Harada-Mori test-tube method. N. americanus larvae were recovered from a total of 1177 (93.9%) coprocultures while A. duodenale larvae were recovered from a total of 274 (21.9%) stool cultures. 58.2% of the hookworm infections were due solely to N. americanus, 6.1% solely to A. duodenale and 25.8% were mixed infections with both species. In all mixed infections, much higher number of N. americanus larvae were recorded compared with those of A. duodenale. Key words : Hookworm species, Necator americanus, Ancylostoma duodenale, filariform larvae. African Journal of Biotechnology Vol.2(11) 2003: 470-473

Relative prevalence of the human hookworm species, Necator americanus and Ancylostoma duodenale in an urban community in Ogun State, Nigeria