*2.2. Statistical Analysis*

The McNemar's test was used to compare frequency on paired data. The concordance between media was evaluated using the Kappa test (K < 0.20 = "poor", 0.20–0.40 = "fair", 0.40–0.60 = "moderate", 0.60–0.80 = "good", and 0.80–1.00 = "very good"). Specificity and sensitivity, as well positive and negative predictive values (PPV and NPV, respectively), and 95% confidence intervals (CI) for both media were calculated, considering the BCYE as a reference medium.

All statistical analyses were performed by Stata software version 11.2 (Stata Corp, College Station, TX, USA).
