The CDC has been unable to determine the origin of a “fast-growing” Salmonella Oranienburg outbreak that has sickened nearly 280 people across 29 states. As of the agency’s latest update on September 24, state and local officials have been collecting food items from restaurants where sick people ate, however since several items were in takeout containers that were contaminated with the strain of Salmonella, the CDC has not been able to identify the source of the outbreak. Sampled items include takeout condiments that contain cilantro and lime.

The first illness was reported on August 3. The CDC also notes that recent illnesses may not yet be reported because it can take three to four weeks to determine whether a sick person is part of an outbreak. Thus far no deaths have been reported.