**5.2 Blood agar**

Some of the strains show beta hemolysis, especially those that are isolated from the pathologic conditions, whereas those which are isolated from normal persons may or may not show hemolysis on blood agar [25, 26] shown in **Figure 4**.


**Table 1.**

*Cultural characteristics of E. coli [22].*

**Figure 3.** *Growth of* E. coli *on nutrient agar [23].*

**Figure 4.** *A. A non-hemolytic* E. coli *strain on blood agar [25]. B. A beta-hemolytic E. coli strain on blood agar [26].*
