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Table 2 Laboratory and clinical results

From: Evaluation of porcine reproductive and respiratory syndrome stabilization protocols in 23 French Farrow-to-finish farms located in a high-density swine area

Farm Due-to-wean piglets (21 or 28 days of age) Gilts Biosecurity Suggestive clinical signs
PCR positive results Strain typing (homologous percentage in ORF7 or ORF5) Positive serological/virological results during follow-up Adherence to recommendations Reproductive disorders, respiratory issues, high losses, and/or coinfections
1 No Not testeda No Yes Nonec
2 No Not testeda No Yes Nonec
3 No Not testeda No Yes Nonec
4 No Not testeda Yes/No Yes Nonec
5 Yes Wild strain (ORF5 96%) Not testedb No Yes
6 No Not testeda No Yes Nonec
7 No Not testeda Yes/No Yes Nonec
8 No Not testeda No Yes Nonec
9 No Not testeda No Yes Nonec
10 No Not testeda Yes/No Yes Nonec
11 No Not testeda No Yes Nonec
12 No Not testeda No Yes Nonec
13 Yes Vaccine strain (ORF7 100%) No Yes Nonec
14 Yes Wild strain (ORF7 96%) Not testedb Partially Nonec
15 No Not testeda No Yes Nonec
16 No Not testeda Yes/No Yes Nonec
17 No Not testeda No Yes Nonec
18 Yes Wild strain (ORF7 95.09%) Not testedb Partially Nonec
19 No Not testeda No Yes Nonec
20 No Not testeda No Yes Nonec
21 No Not testeda No Yes Nonec
22 No Not testeda No Yes Nonec
23 Yes Wild strain (ORF5 88%) Not testedb Partially Nonec
  1. aPCR results being negative, no sequencing could be performed
  2. bIf a wild strain had been identified in piglets at weaning, monitoring of sentinel gilts was cancelled
  3. cClinical assessment was performed at every sampling time