Isolation and Acclimatization

What does all-in/all-out mean?

Proper functioning of an isolation/acclimatization area:

	Isolation	Acclimatization
	2 weeks	2-4 weeks	4-8 weeks
Gilt arrive			Wash and disinfect	Gilts arrive
All tests carried out gilts enter breeding unit

Typical problems

Basic commonsense issues
No isolation facilities Gilts are placed at the end of the breeding barn only. This poses a serious PRRSv risk.	No change of clothing Between the main farm and the isolation facilities.	No acclimatization The only acclimatization offered these gilts was from the passing sows.
Isolation too close to the farm	Movement of needles between groups	No or poor cleaning between groups
Flow issues
Truck dirty	Dirty entry/exit facilities

Proper functioning of an isolation/acclimatisation area

	Isolation	Acclimatization
	2 weeks	2-4 weeks	4-8 weeks
Gilt arrive			Wash and disinfect	Gilts arrive
All tests carried out gilts enter breeding unit

What is not adequate?

Risk: Test results are not available when gilts are needed to move

	Isolation	Acclimatization
	2 weeks	2-4 weeks	4-8 weeks
Gilt arrive			Wash and disinfect	Gilts arrive
Test results not available when gilts enter breeding unit

Solution: Do not move gilts until all results available. There is no compromise.

Risk: Next batch of gilts arrives before current batch leaves

	Isolation	Acclimatization
	2 weeks	2-4 weeks	4-8 weeks
Gilt arrive			Wash and disinfect	Gilts arrive
All tests carried out gilts enter breeding unit
Gilts arrive in adjacent pens

Solution: Need to have sufficient isolation/acclimatization areas. The length of the isolation is only from the introduction of the last group of gilts or boars.

Risk: Boar moved from other group of gilts in a different isolation

	Isolation	Acclimatization
	2 weeks	2-4 weeks	4-8 weeks
Gilt arrive			Wash and disinfect	Gilts arrive
All tests carried out gilts enter breeding unit
Boar from another group of gilts in isolation

Solution: Move boars from main farm down to isolation/acclimatization area and only move back with gilts when all tests on gilts adequate. Boars must not move between isolation/acclimatization areas before test results known.

Risk: No washing between batches – new gilts subjected to a high disease load on entry

	Isolation	Acclimatization
	2 weeks	2-4 weeks	4-8 weeks
Gilt arrive		No Washing and disinfection		Gilts arrive
All tests carried out gilts enter breeding unit

Solution: All-in/all-out is not only animals, includes, water, food, floor, air and medicines