The agency says a tuna product could be contaminated with a bacterium that causes botulism, a potentially fatal form of food poisoning. The U.S. Food and Drug Administration (FDA) has alerted the public to a threat posed by select canned tuna products. The canned tuna is at risk of harboring the bacterium that causes botulism, a potentially fatal form of food poisoning. Here’s what you need to know about the canned tuna recall.