Michigan’s cyclosporiasis outbreak continued to expand in the latest state update, with health officials reporting more than 4,300 cases since late June and over 100 hospitalizations. The increase highlights the growing scale of the foodborne illness in Michigan as well as nationally.

Cyclosporiasis is caused by the Cyclospora parasite and is commonly tied to contaminated food. As case numbers climbed, the outbreak drew added attention from consumers, public health agencies and major restaurant brands that have been linked to concerns around fresh ingredients and supply chains.

Restaurants responded as the situation developed. Taco Bell said it proactively reduced its menu, while Chipotle also remained in focus as investors reacted to the outbreak, sending the company’s shares lower. The response reflects the pressure on chains to manage risk quickly when illnesses rise and public scrutiny intensifies.

With more Michiganders becoming sick, the outbreak remains a significant public health issue for the state. Officials are continuing to track cases and hospitalizations as the investigation moves forward and the impact spreads beyond hospitals to the restaurant industry and financial markets.