Volume 14, Number 11—November 2008
Dispatch
Domestic Pigs and Japanese Encephalitis Virus Infection, Australia
Andrew F. van den Hurk
, Scott A. Ritchie, Cheryl A. Johansen, John S. MacKenzie, and Greg A. Smith
, Scott A. Ritchie, Cheryl A. Johansen, John S. MacKenzie, and Greg A. SmithTable
Mosquito infection rates during 3 recognized incursions of Japanese encephalitis virus, Badu Island, northern Australia*
| Collection location | Pigs located within community |
Pigs relocated outside community |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1995 |
1998 |
2003 |
|||||||||
| No.† | No. detected‡ | Infection rate (95% CI) | No.† | No. detected‡ | Infection rate (95% CI) | No.† | No. detected‡ | Infection rate (95% CI) | |||
| Community | 2,871 | 8 | 3.02 (1.43–5.74) | 23,467 | 38 | 1.69 (1.21–2.29) | 7,019 | 5 | 0.75 (0.28–1.66) | ||
| Piggery | NS | NS | NS | NS | NS | NS | 3,316 | 5 | 1.61 (0.61–3.56) | ||
| Dump | NS | NS | NS | 1,125 | 4 | 3.68 (1.20–8.85) | 6,530 | 6 | 0.99 (0.41–2.07) | ||
*Mosquito infection rates determined by maximum-likelihood estimation; 1995, Apr 8–9 and 20–21, 30 trap nights; 1998, Mar 5–6, 25 trap nights; 2003, Mar 13–19, 92 trap nights; CI, confidence interval; NS, mosquitoes not sampled from this location during the year of collection.
†Total no. mosquitoes processed.
‡No. Japanese encephalitis virus–positive pools detected by virus isolation or TaqMan reverse transcription–PCR.
