chipotleBurson-Marsteller has picked up AOR duties for Chipotle, the struggling fast feeder that split with Edelman over a conflict in January.

Denver-based Chipotle, which has worked with Rubenstein Associates for PR in a series of food-borne crises, is likely cheered by a William Blair & Co. research report this month that found the company's woes may have bottomed out in January.

After dismal revenue results in the fourth quarter, Chipotle will lean on Burson to shore up its consumer PR as it looks to move on from the crisis.

Looking however is a federal criminal probe related to a norovirus outbreak last year.