Some vegetables such as Capsicum annum (Pepper), Lycopersicon esculentum (Tomato), Allium cepa (Onion), Cucumis sativus (Cucumber), Solanum tubero- sum (Potato) and Daucus carrota (Carrot) which are
consumed more frequently in the area were obtained from Kaduna central market
and Kawo market with the aim of isolating and characterizing the different
bacterial flora associated with their spoilage. Four bacteriological media:
Mannitol Salt Agar (MSA), MacConkey Agar (MA), Salmonella Shigella Agar (SSA)
and Blood Agar (BA) were used for the isolation of the bacterial populations.
The results obtained from Kaduna central market indicated the presence of two
Gram positive bacteria viz: Staphylococcus and Streptococcus strains as well
as three Gram negative bacteria including Escherichiacoli, Citrobacter and Klebsiella spp. Staphylococcus aureus is the most abundant
(with 80% relative occurrence) with Strep-tococcus spp being the least abundant (with 10% relative occurrence).
Furthermore, among the Gram negative isolates, Escherichia coli, Citrobacter and Kleb- siella spp had
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