| experimental and field studies on the viability of eggs, and the infectivity of third-stage larvae of the human hookworm necator americanus recovered from the creek waters of the niger delta, nigeria, and their epidemiological significance. | in a combined field and laboratory study, the eggs and 3rd-stage infective larvae of the human hookworm necator americanus were recovered from the creek waters of the niger delta, nigeria. they were tested for viability and infectivity. eggs recovered from fresh water creeks showed a viability or hatching index of between 17.5 and 23.7%. eggs recovered from brackish water showed a viability index of 18.8-21.4% in 'normal' cultures, and a maximum index of 6.3% when cultured in brackish water. the ... | 1988 | 3362571 |