Table 3. Frequency of Toxin-Antitoxin Genes in Biofilm Positive and Negative Isolates by Microtiter Plate Assay ^a.

Toxin-Antitoxin Genes	Biofilm positive isolates	Biofilm negative isolates	Total
mazF
Negative	22 (75.9)	7 (24.1)	29 (100)
Positive	80 (66.1)	41 (33.9)	121 (100)
relE
Negative	15 (68.2)	7 (31.8)	22 (100)
Positive	87 (68)	41 (32)	128 (100)
ccdB
Negative	6 (46.2)	7 (53.8)	13 (100)
Positive	96 (70.1)	41 (29.9)	137 (100)
hipA
Negative	27 (61.4)	17 (38.6)	44 (100)
Positive	75 (70.8)	31 (29.2)	106 (100)
MqsR
Negative	21 (77.8)	6 (22.2)	27 (100)
Positive	81 (65.9)	42 (34.1)	123 (100)

^a Data are presented as No. (%).