PHWR Public Health Weekly Report

Vol.18 No.32, August 14, 2025 Article TypeQuickStatsSurveillance Reports

• Surveillance Reports 2025-08-14

  0 171 73

  Surveillance of Japanese Encephalitis Vector Mosquitoes in the Republic of Korea in 2024

  Gi-hun Kim , Hyunwoo Kim , Jung-Won Ju , Hee-Il Lee

  Public Health Weekly Report 2025; 18(32): 1187-1200 https://doi.org/10.56786/PHWR.2025.18.32.1

  

  

  Abstract

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  Objectives: Japanese encephalitis (JE) is a mosquito-borne disease endemic to Asia and the Western Pacific, including Republic of Korea (ROK), and is primarily transmitted by Culex tritaeniorhynchus. The Korea Disease Control and Prevention Agency conducts annual surveillance of mosquito vectors. This study assessed the status of JE vectors in 2024 and analyzed trends in their density in relation to climatic factors.
  Methods: Surveillance was conducted at 62 locations through cooperation with the Regional Centers for Disease Control, the Ministry of National Defense, Institute of Health and Environment in local government, and the Regional Centers for Vector Surveillance against Climate Change. Black light traps were used to collect mosquitoes twice a week, primarily in livestock sheds. A comparative analysis was performed using data from ten long-term surveillance sites. Meteorological data, including temperature and rainfall, were obtained from the Korea Meteorological Administration’s open data portal to evaluate their effects on mosquito occurrence.
  Results: Seven genera and eighteen mosquito species were identified in 2024, with an overall Trap Index (TI) of 266.5. The TI for Cx. tritaeniorhynchus was 89.8, indicating a 34.8% increase compared with that in 2023.
  Conclusions: Climate change has likely contributed to the JE vector population. In 2024, the population of JE vectors increased, likely due to rising average temperatures and reduced rainfall. The density of Cx. tritaeniorhynchus in ROK has been increasing annually. Therefore, since vector density is closely related to patient management and disease prevention, continuous monitoring and control are necessary.

• Surveillance Reports 2025-08-14

  0 267 69

  Epidemiology and Characteristics of Out-of-hospital Cardiac Arrest in the Chungcheong Region of Republic of Korea in 2023

  Haejun Pyun , Jun Hyeong Jang , Gangmin Lee , Yeon Hwa Choi

  Public Health Weekly Report 2025; 18(32): 1201-1219 https://doi.org/10.56786/PHWR.2025.18.32.2

  

  

  Abstract

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  Objectives: This study aimed to compare key indicators related to out-of-hospital cardiac arrest (OHCA) between the national average and the Chungcheong region in the Republic of Korea, using 2023 national OHCA surveillance data. The intent was to provide data to help develop regionally tailored OHCA management strategies.
  Methods: We analyzed raw data from the 2023 OHCA survey conducted by the Korea Disease Control and Prevention Agency. The study involved 33,402 patients nationwide and 4,260 patients from the Chungcheong region: Daejeon (792), Sejong (158), Chungbuk (1,451), and Chungnam (1,859). OHCA incidence rates, survival outcomes, neurological recovery rates, and general patient characteristics were analyzed using frequencies and percentages.
  Results: The national OHCA incidence was 65.7 per 100,000 individuals. Rates were lower in Daejeon (55.1) and Sejong (41.1) but higher in Chungbuk (91.4) and Chungnam (87.9). Sejong exhibited higher survival and neurological recovery rates than the national average. The OHCA incidence was higher among male and older individuals. More than 70% of the OHCA cases were attributed to disease-related causes. Witnessed cardiac arrest rates were higher across the Chungcheong region. Bystander cardiopulmonary resuscitation (CPR) was most frequent in Sejong (39.1%) and least frequent in Chungnam (18.1%).
  Conclusions: In 2023, OHCA incidence, survival, and neurological recovery rates improved across the Chungcheong region, although regional disparities remained. Given demographic and structural differences, region-specific strategies are required. Enhancing bystander CPR through education and reinforcing community-based emergency response systems are both critical for improving outcomes.

• QuickStats 2025-08-14

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  Trends in the Prevalence Gap of Perceived Health Status between Cities or Provinces, during 2015–2024

  Yoon-sil Ko

  Public Health Weekly Report 2025; 18(32): 1220-1221 https://doi.org/10.56786/PHWR.2025.18.32.3

  

  

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