Detection of Bacteria of the Genus Vibrio in Well, River, and Marine Waters in the City of Conakry
Mohamed Diallo *
Department of Biology, Laboratory for Applied Research in Natural Sciences (LARASCINA), Faculty of Sciences, University of Kindia, P.O. Box 212, Kindia, Republic of Guinea.
Abdoulaye Djibril Diallo
Department of Biology, Laboratory for Applied Research in Natural Sciences (LARASCINA), Faculty of Sciences, University of Kindia, P.O. Box 212, Kindia, Republic of Guinea.
Mamadou Gando Diallo
Department of Biology, Laboratory for Applied Research in Natural Sciences (LARASCINA), Faculty of Sciences, University of Kindia, P.O. Box 212, Kindia, Republic of Guinea.
Souleymane Diallo
Department of Biology, Laboratory for Applied Research in Natural Sciences (LARASCINA), Faculty of Sciences, University of Kindia, P.O. Box 212, Kindia, Republic of Guinea.
Bonaventure Kolie
Department of Biology, Laboratory for Applied Research in Natural Sciences (LARASCINA), Faculty of Sciences, University of Kindia, P.O. Box 212, Kindia, Republic of Guinea.
Boubacar Sidy Sily Bah
Department of Biology, Laboratory for Applied Research in Natural Sciences (LARASCINA), Faculty of Sciences, University of Kindia, P.O. Box 212, Kindia, Republic of Guinea.
Aissatou Boiro
Applied Biology Research Institute of Guinea, P.O. Box 146, Kindia, Republic of Guinea.
Mamadou Yero Boiro
Applied Biology Research Institute of Guinea, P.O. Box 146, Kindia, Republic of Guinea.
Thierno Amadou Labe Balde
Applied Biology Research Institute of Guinea, P.O. Box 146, Kindia, Republic of Guinea.
*Author to whom correspondence should be addressed.
Abstract
Cholera is an infectious bacterial disease caused by an enterotoxin produced by Vibrio cholerae and transmitted through the digestive tract. This study investigated the occurrence of bacteria of the genus Vibrio in water sources in Conakry, Guinea. Sampling was conducted from June to December 2025, and bacteriological analyses were performed at the Applied Biology Research Institute of Guinea laboratory in Kindia. Conventional bacteriological methods, including bacterial isolation and identification, were used to examine 69 water samples collected from eight source categories: bathing water, estuaries, boreholes, lakes, backwaters, wells, rivers and streams. Seven samples (10.14%) were positive for non-pathogenic Vibrio, and the identified species included V. alginolyticus. Salmonella spp. were also detected in two samples, while 60 samples were recorded as negative. Vibrio was detected in all five municipalities surveyed. At the water-source level, positive findings were recorded in lakes, wells, rivers and streams; no positive samples were reported from bathing water, estuaries or backwaters. Salmonella spp. were reported in borehole and well samples. These findings document the presence of the investigated bacteria in several water-source categories in Conakry. The results also indicate the importance of routine bacteriological monitoring and appropriate management of water sources used by the population. The findings should be interpreted within the scope of the 69 samples and the conventional bacteriological methods applied in this survey.
Keywords: Vibrio, V. alginolyticus, water quality, bacteriological analysis, drinking water, groundwater, surface water