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This empirical study examines food sources and their quantitative contribution to the city of Tamale, Ghana. The results contribute to an understanding of the urban food system, and evoke questions relating to the standardised measurement and evaluation of urban food system resilience across geog...


Karg, H.Akoto-Danso, Edmund K.Drechsel, Pay[Examining food sources in the city of Tamale, Ghana]Examining food sources in the city of Tamale, Ghana
Amoah, PhilipDrechsel, PayAbaidoo, R.C.Henseler, M.[Irrigated urban vegetable production in Ghana: Microbiological contamination in farms and markets and associated consumer risk groups]Irrigated urban vegetable production in Ghana: Microbiological contamination in farms and markets and associated consumer risk groups
Keraita, Bernard N.Konradsen, FlemmingDrechsel, PayAbaidoo, R.C.[Reducing microbial contamination on wastewater-irrigated lettuce by cessation of irrigation before harvesting]Reducing microbial contamination on wastewater-irrigated lettuce by cessation of irrigation before harvesting
Ntow, W.J.Gijzen, H.J.Kelderman, P.Drechsel, Pay[Farmer perceptions and pesticide use practices in vegetable production in Ghana]Farmer perceptions and pesticide use practices in vegetable production in Ghana

Assessment was done of heavy-metal contamination and its related health risks in urban vegetable farming in Accra. Samples of irrigation water (n = 120), soil (n = 144) and five different kinds of vegetable (n = 240) were collected and analyzed for copper, zinc, lead, cadmium, chromium, nickel an...


Lente, I.Keraita, Bernard N.Drechsel, PayOfosu-Anim, J.Brimah, A.K.[Risk assessment of heavy-metal contamination on vegetables grown in long-term wastewater irrigated urban farming sites in Accra, Ghana]Risk assessment of heavy-metal contamination on vegetables grown in long-term wastewater irrigated urban farming sites in Accra, Ghana

Quantitative microbial risk assessment (QMRA) is frequently used to estimate health risks associated with wastewater irrigation and requires pathogen concentration estimates as inputs. However, human pathogens, such as viruses, are rarely quantified in water samples, and simple relationships betw...


Silverman, A.I.Akrong, M.O.Amoah, PhilipDrechsel, PayNelson, K.L.[Quantification of human norovirus GII, human adenovirus, and fecal indicator organisms in wastewater used for irrigation in Accra, Ghana]Quantification of human norovirus GII, human adenovirus, and fecal indicator organisms in wastewater used for irrigation in Accra, Ghana

With a rapidly growing urban population in Kumasi, Ghana, the consumption of street food is increasing. Raw salads, which often accompany street food dishes, are typically composed of perishable vegetables that are grown in close proximity to the city using poor quality water for irrigation. This...


Barker, S.F.Amoah, PhilipDrechsel, Pay[A probabilistic model of gastroenteritis risks associated with consumption of street food salads in Kumasi, Ghana: evaluation of methods to estimate pathogen dose from water, produce or food quality]A probabilistic model of gastroenteritis risks associated with consumption of street food salads in Kumasi, Ghana: evaluation of methods to estimate pathogen dose from water, produce or food quality
Semasinghe, C.Benders, J.Vairavamoorthy, VisakanFernando, SudarshanaDrechsel, Pay[Vulnerability and resilience of the Colombo urban food system to extreme weather]Vulnerability and resilience of the Colombo urban food system to extreme weather

Recent studies have examined the urban metabolism of cities using urban consumption as a proxy for food inflows but very few studies have aimed at quantifying the role of cities as trade hubs and nutrient sinks of their hinterlands. We therefore examined the linkages between food and animal feed ...


Karg, H.Akoto-Danso, Edmund K.Drechsel, PayAbubakari, A.-H.Buerkert, Andreas[Food- and feed-based nutrient flows in two West African cities]Food- and feed-based nutrient flows in two West African cities

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