“…Although this result demonstrated that animal passage did not change the features involved, it is possible that the time period (7 days) was insufficient for microevolution. According to several studies, microevolution occurred over longer periods of time and after several passages, as an adaptation to the host (Currie et al 1995, Franzot et al 1998, Blasi et al 2001, McClelland et al 2005, Clancy et al 2006, Cavalcante et al 2007. One exception occurred with urease.…”