Skip directly to search Skip directly to A to Z list Skip directly to site content
CDC Home

Volume 18, Number 11—November 2012


Litchi–associated Acute Encephalitis in Children, Northern Vietnam, 2004–2009

Juliette Paireau, Nguyen Hai Tuan, Rémi Lefrançois, Matthew R. Buckwalter, Ngu Duy Nghia, Nguyen Tran Hien, Olivier Lortholary, Sylvain Poirée, Jean-Claude Manuguerra, Antoine Gessain, Matthew L. Albert, Paul T. Brey, Phan Thi Nga, and Arnaud FontanetComments to Author 
Author affiliations: Institut Pasteur, Paris, France (J. Paireau, R. Lefrançois, M.R. Buckwalter, J.-C. Manuguerra, A. Gessain, M.L. Albert, A. Fontanet); National Institute of Hygiene and Epidemiology, Hanoi, Vietnam (N.H. Tuan, N.D. Nghia, P.T. Nga, N.T. Hien); Université Paris X-Nanterre, Paris (R. Lefrançois); INSERM U818, Paris (M.R. Buckwalter, M.L. Albert); Hôpital Necker-Enfants Malades, Paris (O. Lortholary, S. Poirée); Université Paris Descartes, Paris (O. Lortholary, M.L. Albert); CNRS URA 1930, Paris (A. Gessain); Institut Pasteur, Vientiane, Lao People’s Democratic Republic (P.T. Brey); and Conservatoire National des Arts et Métiers, Paris (A. Fontanet)

Main Article

Table 3

Multivariate analysis of Ac Mong encephalitis, Bac Giang Province, Vietnam, 2004–2009

Variable/category IRR* (95% CI) p value†
Litchi surface, % commune surface


1 <0.001


1.52 (0.90–2.57)


2.94 (1.88–4.60)


2.76 (1.76–4.32)
Poultry density, no./km2


1 <0.001


0.62 (0.43–0.91)


0.61 (0.42–0.89)


0.25 (0.15–0.43)
Mean humidity, %, January–April


1 <0.001


0.84 (0.61–1.16)


0.35 (0.23–0.54)

*IRR, incidence rate ratio.
†Indicates global p value.

Main Article

Top of Page The U.S. Government's Official Web PortalDepartment of Health and Human Services
Centers for Disease Control and Prevention   1600 Clifton Rd. Atlanta, GA 30333, USA
800-CDC-INFO (800-232-4636) TTY: (888) 232-6348 - Contact CDC–INFO