An Investigation of chikungunya outbreak in Satun, May-September 2018

Authors

  • Chaisongkram N Bureau of Epidemiology
  • Thanajirasak S Bureau of Epidemiology
  • Hoomhual N Bureau of Epidemiology
  • Poonkesorn S Bureau of Epidemiology
  • Rangsriwong S Bureau of Epidemiology
  • Poungsombat S Bureau of Vector Borne Disease
  • Netikul C Bureau of Vector Borne Disease
  • Kitchakarn S Bureau of Vector Borne Disease
  • Namvicha S Bureau of Occupational and Environmental Diseases
  • Juntutanon S The office of Disease Prevention and Control (ODPC) region 12
  • Useng A The office of Disease Prevention and Control (ODPC) region 12
  • Nararak O Satun Provincial Health Offices (PHO)
  • Binsaard S Satun Provincial Health Offices (PHO)
  • Manakla Y Satun Hospital
  • Taweewigyakarn P Bureau of Epidemiology
  • Jiraphongsa C The office of Disease Prevention and Control (ODPC) region 9
  • Areechokchai D Bureau of Vector Borne Disease

Keywords:

Chikungunya, Satun, outbreak

Abstract

Background: On 26 July 2018, the situation awareness team received a notification from Office Disease Prevention and Control (ODPC) region 12 that there were 30 laboratory-confirmed chikungunya cases in Satun province. Bureau of Epidemiology, Bureau of Vector Borne Disease, ODPC 12 and Satun PHO jointly conducted the investigation to control the outbreak during 1 August to 28 September 2018.
Methods: Descriptive study was done. Active case finding was done in hospitals, private clinics and pharmacies. Suspected cases were defined by acute fever with joint pain or swelling and myalgia, headache, maculopapular rash or retro-orbital pain. Confirmed cases were persons having clinical symptoms and positive RT-PCR for chikungunya virus. High risk areas were identified by presence of cases in previous 4 weeks in order to implement control measures including regular larva survey. We also identified species of mosquitoes presented in the area and test for chikungunya virus.
Results: During 1 May to 28 September 2018, there were 513 chikungunya cases in Satun, of which 30 were confirmed. The cumulative incidence was 160 per 100,000 population. The median age was 28 (10 month-83 years old). Almost one third of cases were students. The outbreak primarily occurred in 2 districts, Mueang Satun and Kuan Don district in which 12 high risk areas identified. The median HI in high risk areas before and after performed intensive control measure equal 9.3 and 5.7 respectively. From 72 indoor and outdoor mosquitoes captured, one indoor mosquito Aedes aegypti was positive for chikungunya virus.
Conclusion: A confirmed chikungunya outbreak in Satun occurred during rainy season in Thailand. The attack rate in this outbreak high in school-aged and adolescent. The number of new cases declined after high risk area were identified and mosquitoes and breeding sites were destroyed. We found indoor Aedes aegypti carrying chikungunya virus, thus the control measures should also emphasize on elimination of indoor mosquitoes during chikungunya outbreak.

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Published

2024-04-27

How to Cite

N, C., S, T., N, H., S, P., S, R., S, P., C, N., S, K., S, N., S, J., A, U., O, N., S, B., Y, M., P, T., C, J., & D, A. (2024). An Investigation of chikungunya outbreak in Satun, May-September 2018. Weekly Epidemiological Surveillance Report, 50(34), 505–513. retrieved from https://he05.tci-thaijo.org/index.php/WESR/article/view/1496

Issue

Vol. 50 No. 34 (2019): 34th week

Section

Original article

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