Sorry to hear you found foulbrood disease in your hive. Do you know if it's American foulbrood (AFB) or European foulbrood (EFB)? We have a lot of information on diagnosing EFB and AFB in this learning module: diagnostic tools for honey bee medicine.

In Michigan, we don't have reportable honey bee diseases. So, you don't need to report EFB/AFB or have colonies inspected in Michigan. Here is more information about Michigan Beekeeping Rules and Regulations.