Table 3.

Association between biofilm formation, ompA gene and copper tolerance among phage susceptible A. baumannii strains.

Biofilm formation and copper tolerance	No. of phage susceptible isolates		p-values*
	Positive (Yes)	Negative (No)
Biofilm formation
Biofilm formation phenotype	88/173 (50.87%)	19/57 (33.33%)	0.0214
ompA gene	101/198 (51.01%)	6/32 (18.75%)	0.0007
Copper tolerance
Copper tolerance phenotype	9/53 (16.98%)	98/177 (55.37%)	< 0.001
copRS gene	9/46 (19.56%)	98/184 (53.26%)	< 0.001

*p-values less than 0.05 were considered as a statistically significant difference (Fisher's exact test) and are shown in bold.