Abstract
Objective: The main objective of this research was to evaluate the growth parameters and sanitary quality of Solanum nigrum L. irrigated with polluted water from Avo’o river in Nomayos.
 Methods: Faecal sludge, water from Avo’o River and Solanum nigrum L., were analysed with respect to microbiological and parasitological parameters. Four points (S0: Control site, located in Mbankomo at 3 km away from faecal sludge discharge area; S1: located at 810 m before the faecal sludge discharge area; S2: located at 100 m away from the faecal sludge discharge area; and S3: located at 350 m after the faecal sludge discharge area) were considered for sampling events. For faecal indicator (FC: Faecal coliforms and FS: Faecal Streptococci), the membrane filtration method was used. Helminthes eggs were determined using the method of Bailenger, modified by Rodier. The growth parameters of S. nigrum L., measured in different site mentioned above, were plant height, number, length and width of fresh leaves.
 Results: High concentration of FC (6857 ± 5180) and FS (2500 ± 1876 CFU/100 ml), as well as helminths eggs (273 ± 186 eggs/L) were obtained in Avo’o water samples. The strong correlations (r=0.9) clearly show that the waters of the Avo’o stream influence the growth of S. nigrum L.
 Conclusion: Despite the best growth of Solanum Nigrum L. irrigated with water from Avo’o River, high concentration of parasites was obtained on their leaves (43 eggs/100 g) highlight the necessity of a better management of faecal sludge in this city.
Highlights
In urban areas of many developing countries, the excreta disposal location is dramatic
The work of Mercanoglutaban and Halkman [13], Djaouda et al [14], FAO [15], Fouepe et al [16] focused on the evaluation of the biomass of several species of Eucalyptus camaldulensis, Acacia cyanophylus, and Populus nigra mentioned that P. nigra plants showed the greatest growth in height while Cyanophylus and Acacia manifested highest growth in diameter
The objectives were as follows: (a) To characterize different kinds of water used for irrigation of S. nigrum L. in the study area, (b) to evaluate the growth parameters of the plant, and (c) to evaluate the sanitary risks associated to the Solanum nigrum L. produced by farmers
Summary
In urban areas of many developing countries, the excreta disposal location is dramatic. Many studies have shown the effect of wastewaters on the growth and productivity of plants in various countries of the world. The present research work was conducted in a peri-urban area of Yaounde call Nomayos. It aimed at evaluated the effect of various treatment combinations of ordinary water and water contaminated by fecal sludge on the growth characteristics of Solanum nigrum L. The objectives were as follows: (a) To characterize different kinds of water used for irrigation of S. nigrum L. in the study area, (b) to evaluate the growth parameters of the plant, and (c) to evaluate the sanitary risks associated to the Solanum nigrum L. produced by farmers
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