WASHINGTON — U.S. health officials are investigating a multistate outbreak of Salmonella and E. coli infections linked to a recalled alfalfa sprout product.

The CDC issued its warning on August 21, urging attention to the recalled product as investigators work to determine the full extent of the outbreak.

The development has renewed concerns about the risks associated with raw sprouts, which can provide conditions favorable to bacterial growth. Foodborne infections can cause gastrointestinal illness and, in some cases, more serious complications.

Health authorities are working with state agencies and other partners to identify cases and trace the contaminated product through the food supply chain.

The outbreak is another reminder that food recalls can quickly become a national public-health issue when contaminated products are distributed across multiple states.

Consumers should check official CDC and FDA guidance for the latest recall information and follow instructions on whether affected products should be discarded or avoided.