Both European Foulbrood and American Foulbrood are notifiable diseases here in UK. This means that cases MUST be reported to the Beekeeping Inspectorate, who will then inspect your bees and, if there is a positive diagnosis, will tell you what you should do next.
The Inspectors will then inspect all known colonies within the nearby area, and support those other beekeepers whose colonies are also infected. The aim is to restrict the spread of the disease.
There is no shame in admitting that your bees are infected, the greater shame would be trying to hide or ignore either of these diseases and hope they will go away on their own. They won't! All you would achieve is to let foulbrood spread throughout the local honey bee population, with potentially catastrophic results for both other beekeepers's bees and feral colonies.
Please, learn how to recognise these diseases, and ask for help if you think you spot either in any of your colonies.