Table 2.

Distribution of enterococcal clinical isolates according to the capacity for biofilm formation on polystyrene microtiter plates and the presence or absence of esp

esp gene statusBacteriaNo. of isolates with the following biofilm formation capacitya:Total no. of isolates
++++++
Positive E. faecalis 626184393
Negative E. faecalis 5900059
Other enterococci4800048
Total113261843200
  • a −, non-biofilm forming (OD595, ≤1); +, weak biofilm forming (1 < OD595 ≤ 2); ++, medium biofilm forming (2 < OD595 ≤ 3); +++, strong biofilm forming (OD595, > 3).