Abstract
The growing population of the city of Daloa, together with its growing urbanization, has a diversified need for food resources. Urban and periurban production of lettuce is a food resource for its people. This study was designed to assess the risk of microbial contamination. For the conduct of the study, first a survey was carried out on different sites of urban production to know the technical process of production. Then, mature lettuce, ready for sale and then consumed from a site, was subjected to microbiological characterization according to the standards in force. Microbiological analyzes revealed a high contamination. For mesophilic aerobic germs, the charges in CFU/g ranged between 1.7x107 and 6.7x107. The loads in CFU/g for yeasts and molds ranged from 3.4x105 to 9.3x105. As for fecal coliforms and enterobacteria, their loads ranged between 1.2x105 to 2.8x105 CFU/g for the first and 7.2x105 to 106 CFU/g for the second. These samples were contaminated with both Escherichia coli, Staphylococcus aureus c + and Salmonella sp. The loads in E. coli and S. aureus c+ ranged between 9.4x104 and 1.8x105 for the first and 4x103 to 1.1x104 CFU/g for the second. Salmonella sp. was found with loads ranging from 6.1x104 to 8.2x104 CFU/g. Empirical production process would increase the risk of microbial contamination. It is necessary to produce healthy lettuce for Daloa’s consumers.
Highlights
Rapid urbanization and the strong concentration of urban populations have spawned a new form of agriculture, practiced in the urban and periurban areas of the major cities of West Africa
Urban agriculture is a major source of lettuce (Lactuca sativa L.) for urban populations, as is the case in Daloa
The assessment of the risk of microbial contamination revealed that consumption of lettuce (Lactuca sativa L.) from urban production in the city of Daloa would pose a risk to the health of consumers
Summary
Rapid urbanization and the strong concentration of urban populations have spawned a new form of agriculture, practiced in the urban and periurban areas of the major cities of West Africa. The third most populous city in Côte d’Ivoire after Abidjan and Bouake, covering an area of 5.305 km and an estimated population of more than 288 000 in habitants, with its many administrative changes (commune, sub-prefecture, department and region, university town), is confronted with this new form of agriculture (RGPH, 2014; Zah, 2015). This agricultural activity often practiced in the city center, faces enormous difficulties such as the thorny problem of urban pollution and the proximity of garbage and waste disposal sites of all kinds. These farming practices could favor a high contamination of soil and http://jfr.ccsenet.org
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