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Table 4 Biofilm production of bacterial isolates in the present study from patients with HAP

From: Identification and detection of pathogenic bacteria from patients with hospital-acquired pneumonia in southwestern Iran; evaluation of biofilm production and molecular typing of bacterial isolates

  Microtiter plate method Congo red agar method Total
(N = 54)
Acinetobacter baumannii (N = 20) Pseudomonas aeruginosa (N = 13) Escherichia coli
(N = 6)
Staphylococcus aureus
(N = 15)
Strong biofilm producer 18 (90%) 12 (92.3%) 3 (50%) 7 (46.7%) 40 (74%)
Moderate biofilm producer 2 (10%) 1 (7.7%) 1 (16.7%) 4 (26.7%) 8 (14.8%)
Weak biofilm producer 1 (16.7%) 2 (13.3%) 3 (5.6%)
Negative biofilm 1 (16.6%) 2 (13.3%) 3 (5.6%)