Isolation and Identification of Bacterial Contaminants and the Potential Link between Food Contamination and the Risk Factors in Selected Cooked Street Foods on Mombasa Island

  • Alice Odundo Pwani University, Kenya


The street food sector has experienced significant growth in the past few decades due to rapid urbanization. Despite the economic benefits of the sector, it has been recognized as a potential hazard to public health when food is not prepared and handled hygienically. The objective of this study was to isolate and identify Bacterial contaminants and establish the potential link between food contamination and the risk factors in selected cooked street foods on Mombasa Island. The study adopted a descriptive survey and experimental design. One hundred vendors were selected using purposive and systematic random sampling. Representative samples of the food items were randomly collected from five vendors in each of the three locations for microbiological analysis. Standard methods from the Bacteriological Analytical Manual of Foods were used to determine coliform counts, total plate counts, and isolate Ecoli and Salmonella strains. One hundred vendors were selected using simple random sampling method. From the census in the area, there were 130 vendors selling these three food items. Sample size was 107 vendors. Questionnaires were administered to vendors. Data analysis was done using Statistical Package for Social Sciences (SPSS) computer software. Chi-square (χ2) was used to test the relationship between training and various aspects of hygiene. T- Test and Analysis of Variance was used to assess any significant differences between the three areas and between male and female, respectively. The International Commission of Microbiological Specification for Foods standards, (1996), were used to determine the acceptable limits of the bacterial counts in the food items tested. From the study results, Salmonella was detected in 8.9% of the 45 samples analyzed, which were beef samosas. These samples were considered contaminated, as Salmonella should be absent in all food items prepared and sold for consumption. The presence of Salmonella in the beef samosas could have been due to improper food handling or use of leftover foods. Unhygienic practices by some of the vendors, and probably insufficient cooking or reheating of the meat product could have been a contributing factor. This study confirmed the results of others that have identified meat products as being liable to contamination if not well handled.

Keywords: E.Colli, Salmonella, Street food, Bacterial Contaminants, Food Contamination and Mombasa Island.

Author Biography

Alice Odundo, Pwani University, Kenya

School of Hospitality and Tourism


Adams, M, Y and Motarjemi,Y., (1999). WHO Basic Food Safety for HealthWorkers. WHO, Geneva, 3-9.

Altekruse, S., Street, D., Fein, S., and Levy, A., (1995). Consumer Knowledge of Foodborne Microbial Hazards and Food Handling Practices. Journal of Food Protection. 59(3): 287-294.

Andrews, W., Feng, P., Grant 1\. M., Hammack, S. T., Weagent, D. S., (1998). Bacteriological Analytical Manual for Foods. United States.

Angelillo, 1. F., Viggiani, M.A.N., Rizzo, L, and Binco, A., (2000). Food Handlers and Foodborne Diseases: Knowledge, Attitudes, and Reported Behavior, Italy. Journal of Food Production. 63(3): 381- 385.

Centers for Disease Control and Prevention, Department of Human Services, (2002). Food borne diseases. Atlanta Georgia, 1-5.

Chakravarty, 1., and Canet, c., (1996). Street food) in Calcutta. Food and Agriculture Organisation of the United Nation. FAO, Rome, 30-37.

Dawson, R., Liamrangsi, S. and Boccas, F., (1996). Bangkok's street food project. Food, Nutrition and Agriculture, FAO, Rome, 1-9.

Draper, A., (1996). Street food) in developing countries. 771e Potential for Micronutrient Fortification, London School of Hygiene and Tropical Medicine. London, 1-16.

Escalante, A., (2001) Street foods in Asia and The Pacific. Asia, 3··14.

FAO, (1989). Street Food. A summary of F'AO studies and other activities relating to street foods. FAO, Rome, 1··3.

FAO, (1997). FAO Newslights: Streetfood: Small Entrepreneurs, Big Business. FAO, Rome, 1-3.

FAO, (2001a). Street foods made safer. News and highlights, FAO, Rome, 1-2.

FAO, (2001b) Street foods around the world: News and Highlights. FAO, Rome.

FAO/WHO Geneva, (1984). The Role of Food Safety in Health and Development. Report of A Joint FAO/WHO Expert Committee On Food Safety, WHO, Geneva, 4-26.

FAO/WHO, (1986). Guiding Principles on Evaluation of Programs to Ensure Food Safety. WHO, Geneva, 2-13.

FAO/WHO, (2001). Codex Alimentarius General Requirements (Food Hygiene). FAO of United Nations and WHO, Rome, 227-247.

Gay, M., (2002). Multicenter Study of Street Foods In J 3 Towns on Four Continents by the Food and Environment Hygiene Study Group of the International Network of Pasteur and Associated Institute. Journal of Food Production, 65(1): 146-151.

Hutabarat, L.S.R., and FAO (1994). Street foods in Bangkok. The nutritional contribution and contaminants content of street foods. An Andre Mayer Research Fellowship Study, FAO, Rome, 2-18.

Kimani, D., (2001). Report Blames Epidemics on Poor Facilities. The East African, 1-3.

Kishwar, M., (2001). Service, not a nuisance: The economic roots and realities of vending. India Together, India, 4-8.

Klontz, C. K., Timbo, 8., Fien, S and Levy, A., (1995). Prevalence of Selected Food Consumption and Preparation Behaviors Associated with Increased Risk of Foodborne Disease. Journal of Food Protection, 58(1): 927-930.

Martins, J. H., and Anelich, L. E., (2000). Improving street foods in South Africa. Pretoria, South Africa, 3-71.

Mensah, P., Yeboah-Manu. D, Owusu-Darko and Ablordey. A., (2002). Street foods in Accra, Ghana: How safe are they? Accra, Ghana, 1-7.

Mosupye, F. M., and Alexander, H., (1999). Microbiological Quality and Safety of Ready- to Eat Street- Vended Foods In Johannesburg, South Africa. Journal of Food Production, 62 (11): 1278-1284.

Motarjemi, Y., Kaferstein, F., Moy, G., Miyagishima, K., Miyagawa, S., and Reilly, A., (1995). Food Safety Issues. WHO, Geneva, 3-16.

WHO and Ministry of Health (1994). I" Provincial Food Safety Seminar Workshop. Nyanza Province, Kenya, 7-8.

WHO Information, (2002). Food Safety and Food Borne lllnesses. Fact Sheet no. 237, WHO, Geneva, 1-5.

WHO, (2002a). WHO Global Strategy for Food Safety. WHO, Geneva, 1-12.

WHO, (2002b). Food Safety Issues, Terrorist Threats to Food. WHO, Switzerland.

WHO, (2003). Food Safety- a worldwide public health issue. WHO, Geneva,1-3.

WHO, Food Safety Unit, (1995). Essential Safety Requirements for Street vended Foods. WHO, Geneva, 3-13.

WHO, Geneva (1989). Evaluation of Programs to Ensure Food Safety. Guiding Principle, WHO, Geneva, 9-13.
How to Cite
Odundo, A. (2018). Isolation and Identification of Bacterial Contaminants and the Potential Link between Food Contamination and the Risk Factors in Selected Cooked Street Foods on Mombasa Island. Journal of Hospitality and Tourism Management, 1(1), 40 - 56. Retrieved from