Twenty one horses have entered quarantine in the northern hemisphere in preparation for the Melbourne spring carnival.

Sixteen are at Newmarket in England and four are at Coolmore's Ballydoyle facility in Ireland.

Japanese horse Admire Deus. who will be trained by Darren Weir in Australia, has been quarantined for four days and will be the first to arrive on September 26, four days before the European contingent.

When they arrive, they will all spend two weeks in quarantine at the Werribee International Horse Centre.

The full list of international horses (and trainers) in quarantine:

Admire Deus, Darren Weir (Aus)

Red Cardinal, Andreas Wohler (Ger)

Wicklow Brave, Willie Mullins (Ire)

Tiberian, Alain Couetil (Fra)

Francis of Assisi, Charlie Appleby (UK)

Kaspersky, Jane Chapple-Hyam (UK)

Steel of Madrid, Tony McEvoy (Aus)

Folkswood, Charlie Appleby (UK)

Johannes Vermeer, Aidan O'Brien (Ire)

Marmelo, Hughie Morrison (UK)

Taj Mahal, Aidan O'Brien (Ire)

Qewy, Charlie Appleby (UK)

Wall of Fire, Hugo Palmer (UK)

Riven Light, Willie Mullins (Ire)

Kidmenever, Charlie Appleby (UK)

Mask of Time, Ciaron Maher (Aus)

Claudio Monteverdi, Aidan O'Brien (Ire)

Sixties Groove, Andreas Wohler (Ger)

Fastnet Tempest, William Haggas (UK)

Utah, Aidan O'Brien (Ire)

Garcia, Darren Weir (Aus)