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Volume 28, Number 12—December 2022
Dispatch

Sylvatic Transmission of Chikungunya Virus among Nonhuman Primates in Myanmar

Tierra Smiley EvansComments to Author , Ohnmar Aung, Olivia Cords, Lark L. Coffey, Talia Wong, Christopher M. Weiss, Min Thein Maw, JoAnn Yee, Kodumudi Venkateswaran, Neeraja Venkateswaran, Peter Nham, Koen K.A. Van Rompay, Mary Kate Morris, Leo Oceguera, William Werthimer, Carl Hanson, Marc Valitutto, Kyaw Yan Naing Tun, Ye Tun Win, Wai Zin Thein, Susan Murray, Hlaing Myat Thu, and Christine K. Johnson
Author affiliations: University of California, Davis, California, USA (T. Smiley Evans, O. Aung, O. Cords, L.L. Coffey, T. Wong, C.M. Weiss, J. Yee, P. Nham, K.K.A. Van Rompay, C.K. Johnson); Livestock Breeding and Veterinary Department, Yangon, Myanmar (M.T. Maw, Y.T. Win, W.Z. Thein); Tetracore, Inc., Rockville, Maryland, USA (K. Venkateswaran, N. Venkateswaran); California Department of Public Health, Richmond, California, USA (M.K. Morris, L. Oceguera, W. Werthimer, C. Hanson); Smithsonian Institution, Washington, DC, USA (M. Valitutto, S. Murray); Department of Medical Research, Yangon (H.M. Thu)

Main Article

Table

Chikungunya and Japanese encephalitis virus prevalence during October 2016–August 2017 in Hlawga National Park in study of sylvatic transmission of chikungunya virus among nonhuman primates in Myanmar*

Characteristic Chikungunya virus
 Japanese encephalitis virus
No. positive† No. negative† Period prevalence No. positive† No. negative† Period prevalence
Species
Macaca nemestrina (pig-tailed macaque) 8 4 67 (35–90) 1 11 8 (0–38)
Macaca mulatta (rhesus macaque)
 31
 76
 29 (21–39)
4
 103
 4 (1–9)
Sex
M 20 43 32 (21–45) 3 60 5 (0–13)
F
 19
 37
 34 (22–48)
2
 54
 4 (0–12)
Age class
Adult 23 35 40 (27–53) 1 57 2 (0–9)
Subadult
 16
 45
 26 (16–39)
4
 57
 7 (2–16)
Season
Wet 25 69 27 (18–37) 4 90 4 (1–11)
Dry 14 11 56 (35–76) 1 24 4 (0–20)
Overall 39 80 33 (24–42) 5 114 4 (1–10)

*Values are no. or % (95% binomial exact CI). †No. positive or negative serum samples according to the total Ig detected by multiplex bead-based assay. Cutoff values were determined according to the lowest median fluorescence intensity value detected by a positive plaque reduction neutralization test.

Main Article

Page created: October 07, 2022
Page updated: November 21, 2022
Page reviewed: November 21, 2022
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