Table 1.

The assessment of biofilm formation by test pathogens.

Test pathogen	Biofilm Intensity
S. aureus ATCC 29213	++++
E. coli ATCC 35218	+++
P. aeruginosa ATCC27853	++
Citrobacter sp.	+++
S. typhi ATCC 14028	+
E. coli ATCC 11775	+
Bacillus cereus	-

Key: + = slightly formed, ++ = partially formed, +++ = formed, ++++ = strongly formed, - = not formed.