Chromosomal excision of a new pathogenicity island modulates Salmonella virulence in vivo.
Tobar, Hugo E; Salazar-Echegarai, Franciso J; Nieto, Pamela A; Palavecino, Christian E; Sebastian, Vatenlina P; Riedel, Claudia A; Kalergis, Alexis M; Bueno, Susan M