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Volume 15, Number 5—May 2009
Research

Seroprevalence of Antibodies to Avian Influenza Virus A (H5N1) among Residents of Villages with Human Cases, Thailand, 20051

Rapeepan DejpichaiComments to Author , Yongjua Laosiritaworn, Pilaipan Phuthavathana, Timothy M. Uyeki, Michael O’Reilly, Nattaphon Yampikulsakul, Sumreung Phurahong, Phisanu Poorak, Jarunee Prasertsopon, Rumporn Kularb, Kannika Nateerom, Narumol Sawanpanyalert, and Chuleeporn Jiraphongsa
Author affiliations: Thai Ministry of Public Health, Nonthaburi, Thailand (R. Dejpichai, Y. Laosiritaworn, M. O’Reilly, N. Yampikulsakul, S. Phurahong, N. Sawanpanyalert, C. Jiraphongsa); Mahidol University, Bangkok, Thailand (P. Phuthavathana, P. Poorak, J. Prasertopon, R. Kularb, K. Nateerom; Centers for Disease Control and Prevention, Atlanta, GA, USA (T.M. Uyeki)

Main Article

Table 2

Avian influenza virus A (H5N1) neutralizing antibody titers among study participants (N = 901), as determined by microneutralization assay, Thailand, 2005

Village No. residents No. residents by antibody titer
<5 5 10 20 40 80 >80
A 228 227 1 0 0 0 0 0
B 204 202 2 0 0 0 0 0
C 209 202 6 0 1* 0 0 0
D
 260
 257
 2
 1†
 0
 0
 0
 0
Total 901 888 11 1 1 0 0 0

*Serum obtained from a 52-year-old woman (farmer) in village C without history of respiratory symptoms who reported contact with a sick/dead chicken and live poultry.
†Serum obtained from an 18-year-old man in village D without history of respiratory symptoms who reported contact with a sick/dead chicken and live poultry.

Main Article

1Preliminary findings from this study were presented on June 18, 2007, at the Options for the Control of Influenza Conference VI, Toronto, Ontario, Canada.

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