Abstract
Abstract The aim of this study is to determine the effectiveness of disinfectant on the viability of eggs from three nematode species (Ascaris, Trichuris, Ankylostoma). It was conducted in a microcosm from June 2018 to June 2019. The wastewater scan was sampled using 5 L sterile containers, the sample was arranged in four replicas, three tests and one control. The test samples received three disinfectants (Moringa, calcium hypochlorite and Moringa associated with calcium hypochlorite) at varying concentrations. The physical and chemical parameters were measured before and after the application of each disinfectant. The samples were then observed under an optical microscope. The viability of the eggs was determined by incubating the Petri dish samples at 30 °C for 30 days. The analyses show that some physicochemical parameters can significantly influence the efficacy of disinfectant on the eggs. The calcium hypochlorite associated with Moringa at 0.6 g/L showed greater efficacy on reducing viability and inactivation of eggs with 100% efficacy yield rates on Ankylostoma and Trichuris trichiuria and 97% on Ascaris lumbricoides eggs; this efficacy is significantly different from that observed on samples treated with Moringa and simple calcium hypochlorite. Of the three parasites tested, A. lumbricoides showed greater resistance to the disinfectant.
Highlights
Soil transmitted helminth infections (STH) are among the most common infections in low- and middle-income countries (WHO )
In the course of this study, we found that the morphological and structural appearance of incubated eggs varies according to its species
The eggs of Ankylostoma obtained after incubation showed a succession of segmentation of the cytoplasm leading to blastomere formation after 4 weeks (Figure 1(a))
Summary
Soil transmitted helminth infections (STH) are among the most common infections in low- and middle-income countries (WHO ). This infection remains of public health importance, in developing countries (Nasution et al ). The presence of parasitic helminths, intestinal nematodes (Ascaris, Trichuris, Ankylostoma), is the main constraint for the reuse of. There are four important species of STHs that infect humans: Ascaris lumbricoides (roundworm), Trichuris trichiura (whip-worm) and Ankylostoma
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