Force of Infection Model for Estimating Time to Dengue Virus Seropositivity among Expatriate Populations, Thailand
Issued Date
2025-06-01
Resource Type
ISSN
10806040
eISSN
10806059
Scopus ID
2-s2.0-105007126754
Pubmed ID
40439444
Journal Title
Emerging Infectious Diseases
Volume
31
Issue
6
Start Page
1149
End Page
1157
Rights Holder(s)
SCOPUS
Bibliographic Citation
Emerging Infectious Diseases Vol.31 No.6 (2025) , 1149-1157
Suggested Citation
Rapheal E., Kitro A., Imad H., Hamins-Peurtolas M., Olanwijitwong J., Chatapat L., Hunsawong T., Anderson K., Piyaphanee W. Force of Infection Model for Estimating Time to Dengue Virus Seropositivity among Expatriate Populations, Thailand. Emerging Infectious Diseases Vol.31 No.6 (2025) , 1149-1157. 1157. doi:10.3201/eid3106.241686 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/112404
Title
Force of Infection Model for Estimating Time to Dengue Virus Seropositivity among Expatriate Populations, Thailand
Corresponding Author(s)
Other Contributor(s)
Abstract
Dengue is a major cause of illness among local populations and travelers in dengue-endemic areas, particularly those who stay for an extended period. However, little is known about dengue risk among expatriates and other long-term travelers. We used catalytic models of force of infection to estimate time to 60% dengue virus (DENV) seropositivity for a cross-section of expatriates living in Bangkok and Pattaya, Thailand. Our model adjusted for daily time spent outside, years not exposed to DENV, sex, living environment, and use of mosquito repellent, nets, long sleeves, and air conditioning. We estimated an adjusted annual force of infection of 0.014 (95% CI 0.003- 0.054) per year spent in dengue-endemic areas (67.3 years to 60% seropositivity), below that of local populations. Our findings suggest that expatriates have a DENV exposure profile distinct from locals and short-term travelers and should likely be considered independently when developing vaccine and prevention recommendations.