The Delaware Supreme Court has revived a shareholder derivative suit that targeted the directors of Blue Bell Creameries USA Inc. in the wake of a deadly listeria outbreak in 2015 for allegedly failing to enact measures to safeguard its ice cream products from contamination.

A unanimous panel of the high court said Tuesday that plaintiff Jack L. Marchand II had supported claims that two Blue Bell executives, and the company’s board, had failed to implement any system to monitor the safety of the Texas-based company’s product and its compliance with state and federal regulations.