Antibiotic Resistance Profile of E. coli Isolates from Lettuce, Poultry Manure, Irrigation Water, and Soil in Kumasi, Ghana

Table 2

Mean microbial load of lettuce per week (n = 42).

Week	Mean of microbial load (MPN/100 ml)
1	3.18 × 10^5a
2	4.56 × 10^6e
3	1.06 × 10^7c
4	5.23 × 10^6b
5	1.24 × 10^6d
6	5.35 × 10^6b
7	4.10 × 10^6e

Means in a row with different superscripts are significantly different .