Chipotle shares jumped more than 12% to the highest level since early February. Yum Brands said Taco Bell is overcoming a lettuce-related consumer pullback.

The outbreak has sickened thousands and lettuce supplied to Taco Bell is the only source identified by the FDA so far.

Taco Bell’s parent company, Yum Brands, reported robust sales and profit in the second quarter. But more recent sales took a hit after the cyclospora outbreak plunged the…