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Table 2 Mean faecal coliform contamination levels of irrigation water and irrigated lettuce from ten farming sites in Addis Ababa

From: Microbiological quality of lettuce (Lactuca sativa) irrigated with wastewater in Addis Ababa, Ethiopia and effect of green salads washing methods

Sample type Farming sites
Sore Amba Lekunda Peacock-Urael Peacock-Bole Kera Mekanissa Lafto Hana-Mariam Akaki 08 Akaki
Irrigation Water (N = 9 for each farming site)
 Range 3.23–6.73 4.51–6.96 3.65–5.54 2.83–6.23 3.04–6.73 3.59–5.67 3.51–7.20 2.96–5.64 3.58–5.41 3.51–6.15
 Mean (log10 MPN 100 ml−1) 5.06 (1.01)abc 5.61 (0.70)a 5.02 (0.64)abc 4.67 (1.04)bc 4.82 (1.02)abc 4.57 (0.54)bc 4.52 (1.18)bc 4.29(0.70)c 4.58 (0.66)bc 5.24 (0.75)ab
Lettuce (N = 15 for each farming site)
 Range 2-81-4.72 2.66-5.18 3.04-6.96 2.83-4.30 3.04-5.67 2.96-5.32 3.23-6.96 2.83-5.15 2.65-4.64 3.15-7.20
 Mean (log10 MPN 100 g−1) 3.91 (0.73)bc 4.18 (0.74)bc 4.10 (1.00)bc 3.46 (0.44)c 4.05(0.80)bc 3.93 (0.84)bc 5.03 (1.38)a 3.69 (0.58)bc 3.50 (0.59)c 4.19 (1.01)bc
  1. Figures in parentheses represent standard deviation
  2. Values in the same row with different letters differ significantly (p < 0.05)