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  1. 1 World News of Natural Sciences

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  1. 1 2024

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  1. 1 Dike K. S.

  2. 1 Onuoha N.

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Diversity of Microorganisms Associated with Deteriorated Tomatoes Sold by Vendors in Major Markets in Owerri

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Dike K. S., Onuoha N.
World News of Natural Sciences
|
2024
|
vol. 54
123-132
EN
Tomatoes hold considerable significance in Nigeria due to their substantial contributions to the employment sector, income generation for cultivators, and satisfaction of domestic and nutritional food requirements. Nonetheless, postharvest deterioration of a considerable quantity of tomato produce occurs in Nigeria as a result of the growth of spoilage organisms. The diversity of microorganisms associated with the deterioration of tomato fruits sold by vendors in four major markets in Owerri was analyzed. One hundred and twenty samples were randomly drawn from the various markets and subjected to standard microbiological techniques Total viable count (2.6 × 104 CFU/g), total coliform count (4.2 × 104 CFU/g), and total fungi count (7.0 × 105 CFU/g) were highest from deteriorated tomato samples analyzed from the relief market. A total of six bacteria genera belonging to Micrococcus sp., Klebsiella sp., Escherichia coli, Proteus sp., Bacillus sp., and Staphylococcus spp. were identified. Staphylococcus spp (31.75%) was the most predominant bacteria isolate associated with the deteriorated tomato samples. This was followed by Escherichia coli 4 (25%), Bacillus sp. 3 (18.75%), Proteus sp. 2 (12.5%), Enterobacter sp. 1 (6.25%), and Micrococcus sp. Penicillium sp., Aspergillus sp., and Rhizopus sp. were also isolated from the deteriorated tomatoes, with Rhizopus sp. being the most predominant isolate 6 (40%) while Aspergillus sp. 4 (26.7%) was the least predominant isolate. The isolation of potential pathogens from deteriorated tomatoes sold by vendors in the four major markets in Owerri represents a significant health risk to consumers. A robust measure to combat post-harvest deterioration of tomatoes should be put in place by government agencies at all levels. Additionally, public enlightenment and awareness campaigns on the consequences of consuming deteriorated tomatoes should be encouraged.
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