Like the majority of large African cities, Conakry is faced with the problems of wastewater management and the protection of the quality of water resources. This work on the evaluation of the bacteriological and parasitic loads of domestic raw wastewater from Conakry has highlighted the presence of bacteria, such as Salmonella (typhi and spp), faecal Coliforms/Escherichia coli, faecal Streptococci and Parasites in domestic wastewater in the city of Conakry. The bacteriological analysis showed that the loads of faecal coliforms/E.coli (CF) are higher than those of faecal streptococci (SF), with maximum for faecal/E.coli (7×105/100ml) in Dabondy in Matam and in Kakimbo in Ratoma and for faecal streptococci (6×105/100ml) in Dabondy in Matam, Yimbayah market in Matoto and in Kakimbo in Ratoma. The average bacteriological loads in (UFC/100mL) of the five communes of Conakry are respectively: Kaloum CF (4.80×105), S.F (3.60×105); Matam CF (5.80×105), S.F (4.80×105); Matoto CF (4.60×105), S.F (4.20×105); Ratoma CF (4.75.105), S.F (3.75.105) and Dixinn CF (5.75×105), S.F (4×105). The average total loads of the city are thus: CF (5×105), S.F (4.07×105). Qualitative parasitological analysis made it possible to identify eggs and cysts of four types of parasites (Entaboiba histolytica, Ascaris, Pinworms, Fasciola hepatica and Trichuris), with a predominance of eggs of Ascaris sp and Entaboiba histolytica, i.e. 100% each, followed respectively by Pinworm (84%), Trichuris (16%) and Fasciola hepatica (4%). The most contaminated municipalities remain those of Dixinn and Ratoma, followed respectively by Matoto, Matam and Dixinn. The quantitative parasite analysis made it possible to count (eggs/litre) each type of parasite, namely: Ascaris (25.5 eggs/l); Pinworm (4.23 eggs/l); Trichuris (2.4 eggs/l) and Fasciola hepatica (0.2 eggs/l). The microorganisms identified during this research can be the source of a health risk, in particular gastroenteritis, diarrhea, ascariasis, dysentery, hepatitis, typhoid. At the end of this work, we propose carried out a technique of treatment by filtration of the domestic waste water of Conakry, which will be the subject of another article.
Daloba Soumah, Demba Magassouba, Mamby Keita, Ansoumane Sakouvogui. Evaluation of bacteriological and parasitological quality raw domestic waste water from the city of Conakry (Republic of Guinea). International Journal of Biotechnology and Microbiology, Volume 4, Issue 1, 2022, Pages 54-61