For days, the speculation has been rampant: Which Mexican food chain – only identified as “Restaurant Chain A” by federal investigators earlier this month -- was linked to a large salmonella outbreak late last year?

This week, Food Safety News named Taco Bell as the chain in question.

In October and November, at least 68 diners were sickened across 10 states, including 16 in Oklahoma and 43 in Texas. The spate of illnesses eventually petered out and was reported by the Centers for Disease Control on Jan. 19.

But the agency stayed mum on the origin of the salmonella bacteria, saying only that the majority of victims had reported eating at 18 separate locations of “a Mexican-style fast-food restaurant chain” in the Midwest.