Force of Infection Model for Estimating Time to Dengue Virus Seropositivity among Expatriate Populations, Thailand
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 estimat...
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| Format: | Article |
| Language: | English |
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Centers for Disease Control and Prevention
2025-06-01
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| Series: | Emerging Infectious Diseases |
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| Online Access: | https://wwwnc.cdc.gov/eid/article/31/6/24-1686_article |
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| author | Erica Rapheal Amornphat Kitro Hisham Imad Marco Hamins-Peurtolas Jutarmas Olanwijitwong Lapakorn Chatapat Taweewun Hunsawong Kathryn Anderson Watcharapong Piyaphanee |
| author_facet | Erica Rapheal Amornphat Kitro Hisham Imad Marco Hamins-Peurtolas Jutarmas Olanwijitwong Lapakorn Chatapat Taweewun Hunsawong Kathryn Anderson Watcharapong Piyaphanee |
| author_sort | Erica Rapheal |
| collection | DOAJ |
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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.
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| format | Article |
| id | doaj-art-b7ca84e158cc4a9fbda8dd5ae225b7a1 |
| institution | DOAJ |
| issn | 1080-6040 1080-6059 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | Centers for Disease Control and Prevention |
| record_format | Article |
| series | Emerging Infectious Diseases |
| spelling | doaj-art-b7ca84e158cc4a9fbda8dd5ae225b7a12025-08-20T03:21:42ZengCenters for Disease Control and PreventionEmerging Infectious Diseases1080-60401080-60592025-06-013161149115710.3201/eid3106.241686Force of Infection Model for Estimating Time to Dengue Virus Seropositivity among Expatriate Populations, ThailandErica RaphealAmornphat KitroHisham ImadMarco Hamins-PeurtolasJutarmas OlanwijitwongLapakorn ChatapatTaweewun HunsawongKathryn AndersonWatcharapong Piyaphanee 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. https://wwwnc.cdc.gov/eid/article/31/6/24-1686_articledenguevirusesvector-borne infectionstravel medicinevaccinesarboviruses |
| spellingShingle | Erica Rapheal Amornphat Kitro Hisham Imad Marco Hamins-Peurtolas Jutarmas Olanwijitwong Lapakorn Chatapat Taweewun Hunsawong Kathryn Anderson Watcharapong Piyaphanee Force of Infection Model for Estimating Time to Dengue Virus Seropositivity among Expatriate Populations, Thailand Emerging Infectious Diseases dengue viruses vector-borne infections travel medicine vaccines arboviruses |
| title | Force of Infection Model for Estimating Time to Dengue Virus Seropositivity among Expatriate Populations, Thailand |
| title_full | Force of Infection Model for Estimating Time to Dengue Virus Seropositivity among Expatriate Populations, Thailand |
| title_fullStr | Force of Infection Model for Estimating Time to Dengue Virus Seropositivity among Expatriate Populations, Thailand |
| title_full_unstemmed | Force of Infection Model for Estimating Time to Dengue Virus Seropositivity among Expatriate Populations, Thailand |
| title_short | Force of Infection Model for Estimating Time to Dengue Virus Seropositivity among Expatriate Populations, Thailand |
| title_sort | force of infection model for estimating time to dengue virus seropositivity among expatriate populations thailand |
| topic | dengue viruses vector-borne infections travel medicine vaccines arboviruses |
| url | https://wwwnc.cdc.gov/eid/article/31/6/24-1686_article |
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