Variable | Categories | Value label | Percentage |
---|---|---|---|
a. Time (days) between last natural exposure of replacements to live animals or feedback and entry into breeding herd | 0 days | 5 | 20.5% |
1 to 60 days | 4 | 6.8% | |
61 to 90 days | 3 | 1.9% | |
91 days or more | 2 | 0.6% | |
Not applicable | 9 | 70.2% | |
b. Replacements are exposed to serum from viremic pigs or sows via injection prior to entry | Yes | 5 | 14.3% |
No | 1 | 85.7% | |
c. Time (days) between last exposure to injected serum and entry of replacements into breeding herd | 0 days | 5 | 1.9% |
1 to 60 days | 4 | 5% | |
61 to 90 days | 3 | 4.3% | |
91 days or more | 2 | 0.6% | |
Not applicable | 9 | 88.2% | |
d. Number of breeding herd sources from which replacements have been obtained in last two years | 4 or more | 5 | 1.9% |
3 | 4 | 0.6% | |
2 | 3 | 13% | |
1 | 2 | 64% | |
0 | 1 | 20.5% | |
e. Source of replacement animals | Some or all purchased from other production systems/genetic suppliers | 5 | 52.2% |
Some or all from other sites outside the pig flow but within the same production system, none from outside the production system | 4 | 4.3% | |
Some or all from other sites within the same pig flow as this site (e.g., downstream nursery or grow/finish/developer), none from outside the same pig flow | 3 | 3.7% | |
Closed herd at this site (replacements are born at site, moved to another site and later returned as replacements) | 2 | 9.3% | |
Closed site (replacements are born and raised at site and never moved from site) | 1 | 30.4% | |
f. PRRS virus status of breeding herd(s) from which replacements are sourced | One or more sources positive active – this is positive by ELISA and producing PRRSV infected weaned pigs | 5 | 8.7% |
One or more sources with unknown status, none positive active | 4 | 1.9% | |
One or more sources positive stable – that is positive by ELISA but producing non-infected weaned pigs, none positive active or unknown status | 3 | 34.2% | |
All sources currently negative by ELISA but one or more have been positive in the past | 2 | 40.4% | |
All sources have always been negative (naive) | 1 | 14.9% | |
g. PRRS virus status of breeding female replacements in isolation/acclimation | Negative at entry but field virus positive from natural exposure at exit | 5 | 18.6% |
Field virus positive from natural exposure at entry | 4 | 15.5% | |
Negative at entry & negative at exit | 3 | 29.2% | |
Not applicable | 9 | 36.6% | |
h. Response when group of replacement animals in isolation/acclimation becomes positive by PCR or ELISA to PRRS virus from natural field virus exposure | Introduced into breeding herd on regular schedule | 5 | 14.9% |
Introduced into breeding herd after holding period of less than 30 days | 4 | 4.3% | |
Introduced into breeding herd after 30 to 90 day holding period | 3 | 11.2% | |
Introduced into breeding herd after holding period of more than 90 days | 2 | 2.5% | |
Replacements are marketed and not used for breeding purposes | 1 | 26.1% | |
Not applicable | 9 | 41% | |
i. Isolation/acclimation period (days) | 0 or less | 5 | 41.3% |
1 to 60 days | 4 | 41.3% | |
61 to 90 days | 3 | 8.8% | |
91 to 120 days | 2 | 5.6% | |
121 days or more | 1 | 3.1% | |
j. Replacement animal acclimation flow | Continuous flow | 5 | 28% |
All in/all out by room | 4 | 3.7% | |
All in/all out by barn | 3 | 3.1% | |
All in/all out by site | 2 | 0.6% | |
Not applicable | 9 | 64.6% | |
k. Replacement animal isolation flow | Continuous flow | 5 | 20.5% |
All in/all out by room | 4 | 12.4% | |
All in/all out by barn | 3 | 13.7% | |
All in/all out by site | 2 | 0.6% | |
Not applicable | 9 | 52.8% | |
l. Location of replacement animal acclimation housing relative to this site | On-site in same air space as sow herd | 5 | 19.3% |
On-site in different air space as sow herd | 4 | 10.6% | |
Off-site (different site from sow herd) | 3 | 5.6% | |
Not applicable | 9 | 64.6% | |
m. Location of replacement animal isolation housing relative to this site | On-site in same air space as sow herd | 5 | 4.3% |
On-site in different air space as sow herd | 4 | 28.6% | |
Off-site (different site from sow herd) | 3 | 14.9% | |
Not applicable | 9 | 52.2% | |
n. Serum testing of replacement animals for PRRS virus or antibodies by PCR or ELISA upon entry into acclimation/isolation site(s) | No routine testing done | 5 | 66.5% |
A sample subset of incoming animals are tested upon entry | 4 | 4.3% | |
All incoming animals are bled and tested upon entry | 3 | 0.6% | |
Not applicable | 9 | 28.6% | |
o. Serum testing of replacement animals for PRRS virus or antibodies by PCR or ELISA upon exit from acclimation/isolation site(s) | No routine testing done | 5 | 59% |
A sample subset of incoming animals are tested upon entry | 4 | 11.8% | |
All incoming animals are bled and tested upon entry | 3 | 1.9% | |
 | Not applicable | 9 | 27.3% |