Resolved the corruption as follows:

Stop the merge agent jobs for the publications:

Set database to single user mode: ALTER DATABASE database SET SINGLE_USER WITH ROLLBACK IMMEDIATE

Ran DBCC CHECKDB to repair the corrupt page: DBCC CHECK DB (‘database’, REPAIR_ALLOW_DATA_LOSS)

DBCC CHECKCONSTRAINTS WITH ALL_CONSTRAINTS

Set database to multi-user: ALTER DATABASE database SET MULTI_USER; GO

Restarted the merge agent jobs

Confirmed replication running correctly in Replication Monitor

Used sp_addtabletocontents with a filter to repopulate the data that had been lost due to the repair

Ran DBCC CHECKDB to confirm that the database now in a good state