The results obtained with S. aureus were, in general, different—
and, in some cases, even opposite to those encompassingall five compounds tested exhibited a bactericidal effect against S. aureus. At 0.50% (w/v), all those compounds required only 30 min to completely eliminate the initial population of S. aureus, whereas high and medium MW chitosans at 0.25% (w/v) exerted their
activity earlier (by 30 min) than the other three compounds
(by 60 min).At the lowest concentration tested, highMWchitosan
was more efficient—as it required only 1 h,