Abstract
Waste stabilization ponds are frequently considered as being effective for the removal of intestinal parasites while conventional wastewater treatment processes are not. Over an 18-month period grab samples from the stabilization pond system in Grand Cayman, B.W.I., with a total nominal retention period of 23 days, were analysed for the presence of Necator americanus, Trichuris trichiura, Ascaris lumbricoides and Giardia lamblia. Of the inflow samples, 39% were found to be positive for at least one of the parasites while only the eggs of Necator americanus were identified in 44% of the effluent samples.
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