TABLE 3.

Relationship of biofilm formation assessed microscopically and biofilm formation assessed by microtiter plate assay

Comparison	Correlation coefficienta	P valueb,c
Microscopic PVC vs microscopic stainless steel	0.714	0.0347; S
PVC microtiter plate vs microscopic stainless steel	0.571	0.120; NS
PCV microtiter plate vs microscopic PVC	0.810	0.0096; S

^aCorrelation coefficient for biofilm formation of eight L. monocyotogenes strains (Fig. 5) was calculated by Sigma Stat software using Spearman rank order correlation.

^bP value was calculated by Spearman rank order correlation.

^cS, significant (P < 0.050); NS, not significant (P > 0.050).