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Volume 14, Number 11—November 2008

Domestic Pigs and Japanese Encephalitis Virus Infection, Australia

Andrew F. van den HurkComments to Author , Scott A. Ritchie, Cheryl A. Johansen, John S. MacKenzie, and Greg A. Smith
Author affiliations: Queensland Health, Coopers Plains, Queensland, Australia (A.F. van den Hurk, G.A. Smith); The University of Queensland, St. Lucia, Queensland, Australia (A.F. van den Hurk); Queensland Health, Cairns, Queensland, Australia (S.A. Ritchie); James Cook University, Cairns (S.A. Ritchie); The University of Western Australia, Nedlands, Western Australia, Australia (C.A. Johansen)Australian Biosecurity Cooperative Research Centre for Emerging infectious Diseases, Perth, Western Australia, Australia (J.S. Mackenzie);

Main Article


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
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 
Piggery NS NS NS NS NS NS 3,316 5 1.61 
Dump NS NS NS 1,125 4 3.68 
(1.20–8.85) 6,530 6 0.99 

*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.

Main Article

Page created: July 16, 2010
Page updated: July 16, 2010
Page reviewed: July 16, 2010
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