Quarantine Explained: Pre-Export and Post-Arrival
Contents
Import quarantine is the period of supervised isolation and testing an imported horse completes so a destination country can confirm it is not carrying a serious equine disease before it joins the resident population. It is best understood as a system with up to three stages — pre-export isolation at the origin, import quarantine on arrival, and a separate CEM quarantine for breeding-capable mares and stallions — and its severity varies enormously by destination, from a minimum of about three days for a horse entering the US from the EU to weeks of double confinement for Australia. What sets the difficulty is the destination’s biosecurity status, not the distance flown. This page explains why quarantine exists, how the stages fit together, and what a buyer should expect; the country-by-country mechanics live in the US route, the UK route and the worldwide corridors.
Why quarantine exists: the diseases
Quarantine is not bureaucratic caution — it exists because a handful of equine diseases are both serious and difficult to see. A horse can look, move and perform perfectly while carrying an infection, so healthy appearance is not evidence of health. Countries that have eliminated or never had a given disease guard that status jealously, because re-introduction can mean movement bans, culls and the collapse of their competition and breeding economies. A few diseases drive almost the entire global framework:
- Contagious equine metritis (CEM) is a bacterial venereal disease of breeding horses, spread at covering and by contaminated equipment. It causes no lasting illness in the horse but can render mares temporarily infertile, and the organism is genuinely hard to detect on a single test. Countries that consider it eradicated — the US among them — test breeding animals repeatedly on arrival rather than trusting a pre-export result.
- Equine piroplasmosis is a tick-borne blood parasite endemic across much of Europe and the world but not established in the US, Australia or the UK. Infected horses can become lifelong carriers, so an entry blood test is standard on the strict routes.
- African horse sickness (AHS) is the extreme case: an insect-borne viral disease with catastrophic mortality and no practical cure, confined mostly to sub-Saharan Africa. Freedom from AHS is the single most jealously defended equine health status on earth, and the fear of it is the reason the strictest regimes — Australia, New Zealand and the movement rules around the whole southern hemisphere — look the way they do.
- Others in the standard panels include equine infectious anaemia (swamp fever), dourine, glanders and equine influenza — each a reason a particular test appears on a particular route’s checklist.
The pattern to hold onto: the regime’s severity tracks which of these diseases the destination is free of and how determined it is to stay that way.
The three stages of quarantine
A full import can involve up to three distinct confinements, though most horses on the common routes complete only one.
1. Pre-export isolation (at origin). Before a horse leaves for a high-biosecurity destination, it may be confined and tested in an approved facility in the exporting country, so that it arrives already screened. This stage is minimal or absent for the US and intra-European routes but mandatory and substantial for Australia and New Zealand, where the pre-export quarantine happens in an approved European facility before the horse ever boards the aircraft.
2. Import quarantine (at destination). On arrival, the horse moves to a government-approved import centre, is isolated from the resident population, and has blood drawn for the destination’s disease panel. This is the stage most people mean by “quarantine.” Its length is set by the horse’s disease risk — which, for entry purposes, is governed by where it has lived, not where it was born.
3. CEM quarantine (for breeding-capable animals). Mares and stallions over two years old bound for CEM-free countries complete an additional, separate quarantine focused solely on contagious equine metritis, because a pre-export negative is not considered sufficient for a disease this hard to detect. Geldings skip this stage entirely — the single biggest reason a gelding is cheaper and faster to import than a mare or stallion, a point that feeds directly into the mare, gelding or stallion decision.
How regimes differ by destination
The same three-stage framework produces very different experiences depending on the destination’s biosecurity tier.
| Destination tier | Pre-export | Import quarantine | CEM quarantine | Overall |
|---|---|---|---|---|
| EU-internal / UK from EU | none | effectively none for registered sport horses | not applicable within EU | days of paperwork, not isolation |
| United States (from EU) | pre-export CEM test | ~3 days at a USDA import centre | mares ~2 weeks; stallions ~4–5 weeks | days for a gelding, weeks for breeding stock |
| Gulf / East Asia | route-dependent | moderate, country-specific | destination-dependent | middle tier, variable |
| Australia / New Zealand | weeks in an approved EU facility | ~2+ weeks post-arrival | folded into the regime | the strictest, longest and dearest corridor |
The minimal tier. Within the EU, and for a horse moving from the EU to Great Britain, quarantine in the isolation-and-testing sense barely features. A dressage horse registered with an EU-approved studbook or a national branch of an international body typically needs no pre-import disease testing on the EU→GB route; the border formalities are documentary — an export health certificate and customs, not confinement. The horse effectively drives from yard to yard.
The days-scale tier: the United States. US import quarantine runs to a fixed short window for low-risk origins. A horse that has resided in the EU or most of western Europe qualifies for the minimum — about three days — during which blood is tested for equine infectious anaemia, piroplasmosis, dourine and glanders; a positive means refused entry. (Origins with a less favourable health status can face longer windows of seven or sixty days, which is why “where the horse has lived for the previous sixty days” matters more than its passport nationality.) Breeding animals then move on to CEM quarantine. Importantly, USDA APHIS is mid-transition to a new model health certificate as of 2026, so the exact certificate and some procedural detail are being updated within the year — a reason to confirm current requirements with the agent or USDA at the time of shipping, as the US route page notes.
The multi-stage tier: Australia and New Zealand. These operate the world’s most rigorous equine biosecurity, driven by their AHS-free, influenza-managed island status. The regime brackets the flight with two quarantines: pre-export confinement and testing in an approved European facility, then a minimum post-arrival quarantine of roughly two weeks at a government facility such as Mickleham in Victoria. New Zealand and New Caledonia are the rare origins exempt from Australian post-arrival quarantine, being themselves low-risk. This double confinement, not the distance, is what makes the corridor the longest and most expensive on earth — detailed in the worldwide corridors page.
What quarantine is like for the horse
Quarantine is, for the horse, a stint of managed confinement among strangers. During an import quarantine the horse is cared for entirely by facility staff, not by its owner or a familiar groom: visitors are generally not permitted, precisely because uncontrolled human contact is a biosecurity route. Feed is a standard facility ration — US import centres publish a timothy-alfalfa mix with oats — so any horse with special dietary needs must be flagged to the shipping agent in advance rather than accommodated on the day.
The practical costs to the horse are a change of feed, water and routine on top of the flight itself, and a stretch of near-total inactivity. A horse standing in a quarantine box for days or weeks loses fitness and muscle tone, which is one half of why the period immediately after import is treated as reconditioning rather than resumed training. The other half is the journey: horses generally travel well by air, but the cumulative load of the flight, the confinement and the change of climate is real. The logic of the flight itself is covered in air transport; the acclimatisation that follows release — one to two quiet weeks for a well-travelled gelding, longer after CEM quarantine or a major climate change — is covered in the US route’s first-weeks guidance, and it is genuinely part of the purchase, not an optional courtesy.
The CEM quarantine deserves a specific note because its stallion protocol surprises people. Mares are cultured and blood-tested over roughly two weeks. Stallions are cultured and must then test-breed two mares by live cover, with those mares subsequently tested to confirm no transmission — a four-to-five-week process that facilities handle carefully but which turns a green stallion into a more educated one.
Costs
Quarantine costs are grounded in the destination and the horse’s breeding status rather than in a single figure. On the US route as of 2026, the short entry quarantine sits inside the shipping agent’s package (the transatlantic all-in commonly runs $10,000–$30,000, most of it the flight), while CEM quarantine is the line that separates geldings from breeding stock: indicatively around $1,500–$4,000 for a mare and $4,000–$10,000 for a stallion, plus board for the extra days. These are indications, not quotes — facilities and years vary, and a current agent quote supersedes them. Australia and New Zealand sit far above this because the buyer pays for two facilities and a long-haul flight together; the Gulf and East Asia sit in a middle tier. The full framework for assembling these into a budget is the total landed cost page, and insurance should be active from the moment of payment, covering transit and quarantine, as a matter of course.
How quarantine slots shape the timeline
The often-overlooked planning fact is that quarantine capacity, not the horse’s readiness, frequently sets the import date. Government and approved facilities have finite space and must be booked; on the strict routes, the pre-export and post-arrival slots are the scarce resource around which the whole schedule is built. For the US, the short quarantine adds only days to a gelding’s timeline but weeks to a mare’s or stallion’s, which is why the same horse lands sooner and cheaper as a gelding. For Australia, the pre-export facility booking can make the difference of weeks or months and is a reason to begin arranging the corridor the moment a purchase is contemplated rather than after it closes. In every case the discipline is the same: treat quarantine as a booked, capacity-limited stage that the specialist shipping agent schedules, confirm current rules with the destination authority because they change, and budget the horse’s reconditioning time as the final, non-negotiable stage of the journey.
Sources
- USDA APHIS — Importing Live Equines and Equine Germplasm into the United States, 2026. https://www.aphis.usda.gov/live-animal-import/equine
- USDA APHIS — Animal Import Centers: Resources & Guidance, 2026. https://www.aphis.usda.gov/live-animal-import/animal-import-centers
- GOV.UK — Getting and using a horse passport: import or export a horse or related animal, 2026. https://www.gov.uk/horse-passport/import-or-export-a-horse-or-related-animal
- GOV.UK / APHA — Import of equidae, Import Information Note EQ/2b, 2026. https://www.gov.uk/government/publications/equine-live-or-germinal-products-import-information-notes/import-of-equidae-import-information-note-iin-eq2b
- Australian Government Department of Agriculture, Fisheries and Forestry (DAFF) — Importing horses, 2026. https://www.agriculture.gov.au/biosecurity-trade/import/goods/live-animals/importing-live-horses
- Australian Government DAFF — Post entry quarantine facility (Mickleham), 2026. https://www.agriculture.gov.au/biosecurity-trade/import/arrival/post-entry-quarantine
Frequently asked questions
Why do imported horses have to go into quarantine? Quarantine keeps a small number of serious, hard-to-detect equine diseases out of the destination country’s horse population. Blood-borne infections such as equine infectious anaemia and piroplasmosis, the venereal disease CEM, and insect-borne African horse sickness can all travel silently in a healthy-looking horse. Isolation plus on-arrival testing catches them before the horse mixes with the resident population.
How long is horse import quarantine? It depends entirely on the destination. A dressage horse entering the US from the EU clears a minimum quarantine of about three days, while Australia and New Zealand require pre-export confinement in Europe plus at least about two weeks post-arrival. Within the EU, a competition-registered horse moving between member states faces effectively no quarantine at all.
What is CEM quarantine? A separate quarantine for breeding-capable mares and stallions, targeting contagious equine metritis, a venereal disease. In the US, mares over two years are cultured and tested over roughly two weeks; stallions must test-breed two mares by live cover and are held four to five weeks. Geldings are exempt because they cannot transmit the disease.
Can I visit my horse during quarantine? Generally no. Import quarantine facilities restrict access to protect biosecurity, so the horse is cared for entirely by facility staff on a standard ration. Owners usually cannot visit, ride or hand-walk their horse until it is released. This isolation, plus the flight and the change of feed and climate, is why a short reconditioning period after release is standard.
Which destination has the strictest horse quarantine? Australia and New Zealand, by a wide margin. Their island biosecurity regimes require quarantine both before the horse leaves Europe and after it arrives, running to weeks in total rather than the days of the US route. The difficulty reflects the diseases they remain free of, not the flight distance.