The Racing Appeals and Disciplinary Board has disqualified trainers Terry and Karina O'Sullivan over horses returning elevated cobalt readings.

A judge is expected to reserve his decision in Victorian training partners Lee and Shannon Hope's appeal against their cobalt disqualifications.

Melbourne trainers Mark Kavanagh and Danny O'Brien have been fined in the long-running cobalt case.

Melbourne trainers Mark Kavanagh and Danny O'Brien have been fined in the long-running cobalt case.

Father and daughter training partners Terry and Katrina O'Sullivan, Monica Croston, Matthew Leek and Trevor Andrews have been charged with cobalt offences