X= average number of bacterial colonies in the agar plate from control
Y = average number of bacterial colonies in the agar plates from fabric dyed in the presence of chitosan
Figure 5.10 shows representative photographs of biocidal activity in the agar plates corresponding to the control fabric (A) with 253 CFU of E. coli and the test sample dyed in the presence of 0.05% chitosan (B) with no bacterial growth. The results are in agreement with earlier research, which reported antimicrobial properties of cotton fabrics treated first with chitosan by exhaust dyeing and then dyed by exhaust or padding methods [96, 176, 190, 191].The above results are summarised in Table 5.3.