The Rowan County Health Department has eight confirmed cases of E. coli and is tracking seven potential cases, reports the Independent Tribune.

Health Director Leonard Wood said calls about illness from the bacteria have decreased. “We’re beginning to see a slowdown in calls,” Wood said. “We don’t know the final number, but things have slowed down.”

The latest case was confirmed on Tuesday, Cabarrus Health Director Fred Pilkington said. Last week, Rowan and Cabarrus health officials began an investigation when residents complained of E. coli-like symptoms. The investigation led officials to Captain’s Galley Seafood Restaurant in China Grove.