Table II.
Summary of diagnostic data from phases 1 and 2
| Area tested | Trt 1 | Trt 2 | Trt 3 | Trt 4 | Neg Ctrl |
|---|---|---|---|---|---|
| Trailer interior pretreatment | 20/20a | 20/20 | 19/20 | 20/20 | 0/20 |
| Trailer interior 60 min posttreatment | 20/20 | 20/20 | 2/19 | NT | 0/20 |
| Trailer interior 90 min posttreatment | 20/20 | 20/20 | 0/19 | NT | 0/20 |
| Trailer interior allowed to dry (8 h) | NT | NT | NT | 0/20 | 0/20 |
| Number of PRRSV (+) pigs postexposure | 2/4b | 2/4 | 0/4 | 0/4 | 0/4 |
Trt 1 — Treatment 1, washing only; Trt 2 — Treatment 2, washing plus formaldehyde; Trt 3 — Treatment 3, washing plus glutaraldehyde: quaternary ammonium chloride; Trt 4 — Treatment 4, washing plus overnight drying; Neg Ctrl — Sham-inoculated protocol control; NT — Not tested; PRRSV — Porcine reproductive and respiratory syndrome virus
a
Number of polymerase chain reaction (PCR)-positive swabs per number of replicates conducted
b
Number of replicates that demonstrated PRRSV infection of naïve sentinel pigs housed in treated trailers for 2 h per number of replicates conducted