Written by 1:01 PM Culture

355 lives were taken over the course of 10 years… The identity of the ‘murderous insect’ spreading in the Korean Peninsula.

Appearance of adult ixodid tick at developmental stages. Photo by Korea Centers for Disease Control and Prevention

Appearance of adult ixodid tick at developmental stages. Photo by Korea Centers for Disease Control and Prevention

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, ‘ The Korea Centers for Disease Control and Prevention warned of infections caused by the adult ixodid tick as it is expected that the summer temperatures will be higher than usual this year. ‘,
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, ‘ According to the results of the adult ixodid tick surveillance program that started in April, the adult ixodid tick index increased by 37.5% compared to the average year and by 29.6% compared to the previous year. ‘,
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Adult ixodid tick index: Total number of adult ixodid ticks collected/Total number of collection devices. Korea Centers for Disease Control and Prevention

Adult ixodid tick index: Total number of adult ixodid ticks collected/Total number of collection devices. Korea Centers for Disease Control and Prevention

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, ‘ The main cause of this increase in adult ixodid tick infestation is attributed to the average temperature in April rising by 1.8℃ compared to last year. ‘,
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, ‘ In particular, except for Jeju Island and Gyeongsangbuk-do, the adult ixodid tick index significantly increased in all regions. The temperature rise in these areas was 2.0℃, higher than Jeju Island and Gyeongsang-do (1.6℃). ‘,
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Regional distribution of adult ixodid ticks in 2024. Korea Centers for Disease Control and Prevention

Regional distribution of adult ixodid ticks in 2024. Korea Centers for Disease Control and Prevention

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, ‘ The adult ixodid tick is a vector that transmits various pathogens such as viruses (severe fever with thrombocytopenia syndrome (SFTS), tick-borne encephalitis), bacteria (Lyme disease), and rickettsia (Q fever). It is known to transmit diseases such as SFTS and Lyme disease in Korea. ‘,
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, ‘ SFTS, also known as the “killer tick,” has no vaccine or cure. ‘,
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, ‘ According to the Korea Centers for Disease Control and Prevention, since the first SFTS patient was reported in Korea in 2013, a total of 1895 patients have been reported until 2023. Among them, 355 have died, with a fatality rate of 18.7%. ‘,
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SFTSV-transmitting adult ixodid ticks. A: Haemaphysalis longicornis, B: Haemaphysalis flava, C: Ixodes nipponensis, D: Amblyomma testudinarium. Korea Centers for Disease Control and Prevention

SFTSV-transmitting adult ixodid ticks. A: Haemaphysalis longicornis, B: Haemaphysalis flava, C: Ixodes nipponensis, D: Amblyomma testudinarium. Korea Centers for Disease Control and Prevention

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, ‘ The Korea Centers for Disease Control and Prevention recommended wearing long-sleeved shirts and pants during agricultural work or outdoor activities, and checking for adult ixodid ticks on the body after outdoor activities. ‘,
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, ‘ Additionally, it is difficult to remove adult ixodid ticks directly from the body, and there is a risk of secondary infection, so it is recommended to visit a medical facility for safe removal to avoid potential complications. ‘,
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Q&A on SFTS-Transmitting Adult Ixodid Ticks
Q : Where do adult ixodid ticks usually bite as vectors of severe fever with thrombocytopenia syndrome (SFTS)?
Adult ixodid ticks are usually found in dense vegetation and attach to hosts such as humans or animals (humans, wild mice, deer, wild boars, etc.) by clinging on and then feeding on blood. Since they do not fly far, they come into contact and bite only when they encounter a host in the area where ticks live.


If bitten by a tick, will you definitely be infected with SFTS?
A : Not everyone who is bitten by a tick will be infected with SFTS. According to the nationwide tick collection survey conducted by the Korea Centers for Disease Control and Prevention, ticks carrying the SFTS virus showed a minimum positivity rate of 0.5%, indicating that only some ticks are infected with the SFTS virus.


Is there human-to-human transmission of SFTS?
A : The SFTS virus is primarily transmitted through ticks, unlike respiratory-transmitted diseases such as influenza or SARS (SARS-CoV). However, there have been cases of SFTS occurring in some medical personnel and close contacts who were directly exposed to the patient’s blood, indicating the need for caution when in contact with SFTS patients.

Q : I have confirmed that I was bitten by a tick. Should I get tested for SFTS even if I don’t have any symptoms?
A : Not everyone who is bitten by a tick will be infected. Testing will not confirm infection before symptoms appear. If you have confirmed a tick bite, remove the tick according to the proper method and disinfect the area. Then, carefully observe for 15 days for clinical symptoms such as fever, vomiting, and diarrhea. If symptoms occur, seek immediate medical attention.

Q : How can I avoid getting infected with SFTS?
A : It is important to avoid tick bites. Pay attention from spring to fall when ticks are most active, and be cautious about exposure to adult ixodid ticks, especially in ankle-high grassy areas in wild areas where contact with ticks is likely. This is also effective in preventing other tick-borne infectious diseases. If entering areas with abundant ticks, such as tall grass or shrubs, wear long-sleeved shirts, long pants, long socks covering the ankles, tuck the ends of pants into socks, and wear shoes that cover the entire foot to minimize the possibility of ticks penetrating into clothing. Also, shower after outdoor activities and check for ticks attached to the body.

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This article was written with the assistance of a generative AI system created by Central Daily News using Google’s AI technology.

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