When I think Chicago, I still think crabs.

A Cook County Health Department spokeswoman says test results have confirmed that the number of people who contracted norovirus food poisoning connected to Bob Chinn’s Crab House in Wheeling, Illinois, has now risen to 146.

Case investigations are ongoing, but at this time a source for the virus has not been identified.

Bob Chinn’s, which bills itself as the nation’s fourth busiest restaurant, reopened Wednesday afternoon, one day after it voluntarily closed its doors in the wake of several customers becoming sick.