Listeria monocytogenes: Prevalence and contamination profile in different categories of ready-to-eat foods within Ibadan metropolis, Oyo State, Nigeria


  • Kubrat Oyinlola Koladaisi University, Ibadan
  • Augustina Balogun


Ready-to-eat food, Listeria monocytogenes, Listeriosis, Food contamination


The present investigation encompasses the incidence of Listeria monocytogenes in some ready-to-eat food samples, a human pathogen in the outbreak of listeriosis worldwide. A total of 104 food samples, comprising of chicken-pie, apple, shrimps, dried fish, fura, kilishi, salad and yoghurt were analyzed. Samples were tested using standard bacteriological methods to detect the presence of Listeria monocytogenes. Twenty-five suspected Listeria species were isolated from the samples except chicken pie, dried fish, yoghurt, and their percentage occurrence were 8% (kilishi), 28% (shrimps), 24% (fura), 32% (salad) and 8% (apple). Nineteen of these isolates showed α and β haemolysis, however, only 16 were positive to CAMP test, and as such, identified as L. monocytogenes. Shrimp had the highest number (6) of L. monocytogenes, followed by salad, with 5, fura had 4 and 1 from apple. The results indicated that some of the food samples analysed were contaminated with Listeria monocytogenes and posed a threat to consumers.


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Alsheikh, A. D. I., Mohammed, G. E. and Abdalla, M. A. 2013. Isolation and Identification of Listeria monocytogenes from Retail Broiler Chicken Ready to Eat Meat Products in Sudan. International Journal of Animal and Veterinary Advances. 5(1): 9-14.

Bayoub, K., Baibai, T., Mountassif, D., Retmane, A. and Soukri, A. 2010. Antibacterial activities of the crude ethanol extracts of medicinal plants against Listeria monocytogenes and some other pathogenic strains. African Journal of Biotechnology. 9: 4251–4258.

Camargo, A. C., Woodward, J. J. and New, L. A. 2016. The continuous challenge of characterizing the foodborne pathogen Listeria monocyogenes. Foodborne Pathogens and Disease. 13(8): 405-416.

Cummins, A. I., Fielding, A. K. and Mclauchlin, J. 1994. Listeria ivanovii infection in a patient with AIDS. J. Journal of Infection. 28: 89-91.

Daeschel, M. A. 1989. Antimicrobial substances from lactic acid bacteria for use as food preservatives. Food Technology. 43: 164–166.

Groves R. D. and Welshimer J. 1977. Separation of pathogenic from apathogenic Listeria monocytogenes by three in vitro reactions. Journal of Clinical Microbiology. 5: 559–563.

Harrigan, W. F. and McCance, M. E. 1976. Laboratory Methods in Food and Dairy Microbiology 1st Edition. Academic Press, London. (pp. 25-29).

Ikeh, M. A. C., Obi, S. K. C., Ezeasor, D. N., Ezeonu, I. M. and Moneke, A. N. 2010. Incidence and pathogenicity profile of Listeria sp. isolated from food and environmental samples in Nsukka, Nigeria. African Journal of Biotechnology. 9(30): 4776-4782.

Islam, M.S., Husna, A. A., Islam, M. A. and Khatun, M. M. 2016. Prevalence of Listeria monocytogenes in Beef, Chevon and Chicken in Bangladesh. American Journal of Food Science and Health. 2 (4): 39-44.

Jamali, H., Paydar, M., Ismail, S., Looi, C. Y., Wong, W. F., Radmehr, B. and Abedini, A. 2015. Prevalence, antimicrobial susceptibility and virulotyping of Listeria species and Listeria monocytogenes isolated from open-air fish markets. BMC Microbiology. 15:144.

Jami, M., Ghanbari, M., Zunabovic, M., Domig, K. J. and Kneifel, W. 2014. Listeria monocytogenes in Aquatic Food Products—A Review. Comprehensive Reviews in Food Science and Food Safety. 13: 798–813.

Jarvis, N.A., O’Bryan, C.A., Ricke, S.C., Johnson, M.G. and Crandall, P.G. 2016. A review of minimal and defined media for growth of Listeria monocyogenes. Food Control. 66: 256-269.

Kornacki, J. L. and Gurtler. J. B. 2007. Incidence and control of Listeria monocytogenes in food processing facilities, Chapter 17. In, E. T. Ryser and E. H. Marth (eds.), Listeria, Listeriosis and Food Safety, 3rd ed. CRC Press Taylor & Francis Group, Boca Raton, FL.

Lennox, J. A., Etta, P. O., John, G. E. and Henshaw, E. E. 2017. Prevalence of Listeria monocytogenes in Fresh and Raw Fish, Chicken and Beef. Journal of Advances in Microbiology. 3 (4): 1-7.

Leong, D., Alvarez-Ordóñez, A., Jooste, P. and Jordan, K. 2016. Listeria monocytogenes in food: Control by monitoring the food processing environment. African Journal of Microbiology Research. 10 (1): 1-14.

Liu, D. 2006. Identification, subtyping and virulence determination of Listeria monocytogenes, an important foodborne pathogen. Journal of Medical Microbiology. 55: 645-659.

Momtaz, H. and Yadollahi, S. 2013. Molecular characterization of Listeria monocytogenes isolated from fresh seafood samples in Iran. Diagnostic Pathology. 8: 149

Noordhout, C. M., Devleesschauwer B., Angulo F. J., Verbeke G., Haagsma J., Kirk M. L., Havelaar A. H. and Speybroeck N. 2015. The global burden of listeriosis: a systematic review and meta-analysis. Lancet. 14(11): 1073–1082.

Norris, J. and Ribbons, D. 1971. Methods in Microbiology, Vol 6A. Academic Press, London and New York.

Olutiola, P. O., Famurewa, O. and Sonntag, H. G. 2000. An Introduction to General Microbiology: A Practical Approach. 2nd ed. (pp. 157-175). Bolabay Publications, Nigeria.

Pérez-Trallero, E. et al. 2014. Two outbreaks of Listeria monocytogenes infection, Northern Spain. Emerging Infectious Diseases. 20: 2155-2157.

Ponniah, J., Robin, T., Paie, M. S., Radu, S., Ghazali, F. M. and Kqueen, C. Y. 2010. Listeria monocytogenes in raw salad vegetables sold at retail level in Malaysia. Journal of Food Control. 21: 774-778.

Schuchat, A., Swaminathan, B. and Broome, C.V. 1991. Epidemiology of human listeriosis. Clinical Microbiological Review. 4: 169–183.

Seeley, H. W. (Jnr) and Van Demark, P. J. 1972. Microbes in action- a laboratory manual of Microbiology. Freeman, San Francisco. (pp. 361).

Takarada, K., R. Kimizuka, N. Takahashi, K. Honma, K. Okuda and Kato, T. 2004. A comparison of the antibacterial efficacies of essential oils against oral pathogens. Oral. Microbiol. Immunol. Journal of Medical Sciences. 2: 209-212.

Wan Norhana, M.N., Poole, S.E., Deeth, H.C. and Dykes, G.A. 2010. Control of Listeria monocytogenes with combined antimicrobials following post-process contamination and extended storage frankfurters at 4˚C in vacuum-packages. Journal of Food Protection. 64: 1722-1729.

Wong, W. C., Pui, C. F., Chilek, T. Z. T., Noorlis, A., Tang, J. Y. H. and Nakaguchi, Y. 2011. Survival of Listeria monocytogenes during frying of chicken burger patties. Food and Nutrition Sciences. 2: 471-475.




How to Cite

Oyinlola, K., & Balogun, A. (2022). Listeria monocytogenes: Prevalence and contamination profile in different categories of ready-to-eat foods within Ibadan metropolis, Oyo State, Nigeria. Food and Applied Bioscience Journal, 10(1), 1–12. Retrieved from



Food Biotechnology, Microbiology and Food Safety & Quality