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Volume 25, Number 7—July 2019
Research

Asymptomatic Dengue Virus Infections, Cambodia, 2012–2013

Sowath Ly1, Camille Fortas1, Veasna Duong, Tarik Benmarhnia, Anavaj Sakuntabhai, Richard Paul, Rekol Huy, Sopheak Sorn, Kunthy Nguon, Siam Chan, Souv Kimsan, Sivuth Ong, Kim Srorn Kim, Sowathy Buoy, Lim Voeung, Philippe Dussart, Philippe Buchy12, and Arnaud Tarantola1Comments to Author 
Author affiliations: Institut Pasteur du Cambodge, Phnom Penh, Cambodia (S. Ly, C. Fortas, V. Duong, S. Sorn, K. Nguon, S. Chan, S. Kimsan, S. Ong, P. Dussart, P. Buchy, A. Tarantola); University of California, San Diego, California, USA (T. Benmarhnia); Institut Pasteur, Paris, France (A. Sakuntabhai, R. Paul); Malaria National Center, Phnom Penh (R. Huy); Kampong Cham Provincial Hospital, Kampong Cham, Cambodia (K.S. Kim); Prey Chhor District Referral Hospital, Kampong Cham (S. Buoy); Tboung Khmum District Referral Hospital, Thoung Khmum, Cambodia (L. Voeung)

Main Article

Table 3

Univariate tests for associations between sociodemographic factors and infecting serotypes with asymptomatic dengue virus infections, Cambodia, 2012–2013*

Factor
 Asymptomatic, n = 26
 Symptomatic, n = 320
 p value†
Sex
M 17 154 0.09
F
 9
 166
Age, y
0.5 to <1 0 9 (2.8) 0.976
1–5 9 (34.6) 99 (30.9)
6–10 9 (34.6) 117 (36.6)
11–14 5 (19.2) 66 (20.6)
15–30 3 (11.5) 29 (9.1)
Mean 
(+ SD, median)
 9.2 
(+ 7.2, 8)
 11.0 
(+ 7.1, 10)
Relationship to index case-patient
Neighbor 17 (65.4) 243 (76.0) 0.004
Cousin 5 (19.2) 53 (16.6)
Sibling 1 (3.9) 22 (6.9)
Other
 3 (11.5)
 1 (0.3)
Source of household income
Planting crops 14 (53.8) 192 (60.0) 0.812
Working in a 
factory 3 (11.5) 53 (16.6)
Shopkeeping 5 (19.2) 36 (11.3)
Fishing, farming, 
animal husbandry 1 (3.9) 17 (5.3)
Working in 
government 0 6 (1.9)
Other or missing
 3 (11.5)
 16 (5.0)
DENV serotype‡
DENV-1 21 (80.8) 249 (79.1) 0.892
DENV-2 2 (7.7) 35 (11.1)
DENV-3 0 2 (0.6)
DENV-4 3 (11.5) 28 (8.9)

*Values are no. (%) patients except as indicated. DENV, dengue virus.
†By Fisher test or χ2 test.
‡Data for 5 symptomatic patients were missing, and another patient was excluded from analysis because of co-infection with DENV-1 and DENV-2.

Main Article

1These authors contributed equally to this article.

2Current affiliation: GlaxoSmithKline Vaccines Research and Design, Singapore.

Page created: June 17, 2019
Page updated: June 17, 2019
Page reviewed: June 17, 2019
The conclusions, findings, and opinions expressed by authors contributing to this journal do not necessarily reflect the official position of the U.S. Department of Health and Human Services, the Public Health Service, the Centers for Disease Control and Prevention, or the authors' affiliated institutions. Use of trade names is for identification only and does not imply endorsement by any of the groups named above.
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