2.5. Statistical analyses
Statistical analyses were performed with SAS 9.2 (Statistical
Analysis System, Cary, NC, USA) using the general linear model. For
descriptive analysis, summary statistics were used to compare the
number of survivors among groups. Tukey's multiple comparison
test was used to determine mean treatment differences (p 0.05).
The number of survivors from the two types of media were
compared using Student's t test with ɑ ¼ 0.05.