{"content_id":"hzzbp8ejva","slug":"scrub-typhus-autumn-prevention-eschar","locale":"en","schema_type":"Article","category":"knowledge_base","category_name":"Knowledge Base","title":"Scrub Typhus: Fall Prevention and What an Eschar Means","summary":"Scrub typhus is an infectious disease caused by bites from chiggers carrying the bacterium. This overview explains the meaning and limitations of an eschar, precautions before and after outdoor activities, and what to tell medical staff if a fever develops.","sponsorship_disclosure":null,"affiliate_disclosure":null,"commerce_disclosure":null,"author":{"name":"Injoys Editorial Team","url":"https://injoys.com/ko/about"},"key_points":["Infection occurs when a person is bitten by a chigger carrying the bacterium that causes scrub typhus.","In South Korea, cases are generally concentrated in October and November, but also occur at other times of the year.","An eschar is a diagnostic clue, but infection cannot be ruled out just because one is not visible.","Prevention basics include wearing long sleeves and long pants, using repellent, limiting contact with grass, and showering and washing clothes after returning home.","If you develop a fever after outdoor activities, tell medical staff where the activities took place and on which dates."],"content_markdown":"Scrub typhus is an infectious disease caused by the bite of a chigger larva carrying the bacteria. The basis of prevention is reducing skin exposure during outdoor activities. Infection is still possible even if no black scab, known as an eschar, is visible. A fever after outdoor activities requires medical attention.\n\nThe information on the peak season in South Korea and the numbers of chiggers collected is based on the Korea Disease Control and Prevention Agency's announcement of August 26, 2026.\n\n## Scrub typhus transmission and autumn cases\n\nInfection occurs through the bite of a chigger larva carrying the pathogen. The pathogen responsible is the bacterium Orientia tsutsugamushi. The bacteria enter the body as the larva attaches to the skin and feeds on body fluids.\n\nChiggers live in grassy areas and environments with shrubs. Exposure can occur not only during farm work but also while clearing vegetation around graves, hiking, or camping. It is important to identify activities that involved actual contact with grass rather than focusing on a person's occupation.\n\nCases in South Korea are generally concentrated in **October to November**. This is when chigger larval activity overlaps with outdoor work during the harvest season. However, the disease is not limited to these two months in autumn.\n\nThe Korea Disease Control and Prevention Agency's August 2026 guidance identifies October to November as the peak period for cases. Infection therefore cannot be ruled out simply because November has passed. In other countries, the peak season varies with the local climate.\n\n## Scrub typhus symptoms and when to seek medical care\n\nTypical symptoms include fever, chills, headache, and muscle pain. A skin rash or swollen lymph nodes may also occur. Early symptoms alone make it difficult to distinguish the disease from a cold or other infections that cause fever.\n\nThe National Health Information Portal states that the incubation period is within 10 days after a bite. The incubation period is the time between infection and the onset of symptoms. This period should not be used as a basis for diagnosing yourself at home or delaying medical care.\n\nThe Honam Regional Center for Disease Control and Prevention's announcement, “Launch of Scrub Typhus Vector Surveillance in the Honam Region,” includes the following guidance.\n\n\u003e If you develop a fever after outdoor activities in autumn, visit a nearby medical facility for diagnosis and treatment.\n\nA fever or rash after outdoor activities requires prompt medical attention. Tell the medical team about your activities even if you do not remember being bitten by a mite. Difficulty breathing or reduced alertness requires emergency medical care.\n\n- Common symptoms that raise suspicion: fever, chills, headache, muscle pain, rash\n- Information to check alongside symptoms: recent outdoor activities, skin changes, date symptoms began\n- Warning signs of a potentially severe condition: difficulty breathing, changes in consciousness\n\n## The significance and limitations of an eschar in scrub typhus\n\nAn eschar is a scab that forms when skin tissue at the bite site is damaged. In this disease, a black scab provides a diagnostic clue. It is a different skin change from a rash that spreads over the trunk or limbs.\n\nEschars can form in hidden areas such as the armpits and groin. They may also occur in places that are difficult to check, such as the scalp or behind the ears. Looking only at the easily visible arms and legs is not enough to conclude that there is no eschar.\n\nAn eschar is not found in every patient. Even if you find a black scab, that alone cannot confirm the diagnosis. Medical professionals assess activity history, symptoms, physical examination findings, and test results together.\n\n| Observation | What it may indicate | Judgment to avoid |\n| --- | --- | --- |\n| Fever and a black scab after outdoor activities | A clue to infection that should be reported during a medical visit | Confirming the diagnosis from a photo alone |\n| Fever alone after outdoor activities | Infection needs to be considered even without an eschar | Assuming it must be a cold because there is no scab |\n| A black scab alone | The cause of the skin lesion needs to be checked | Treating every black scab as the same infectious disease |\n\n## Scrub typhus prevention before and after activities\n\nThe key to prevention is reducing opportunities for chiggers to come into contact with the skin. Repellents are an additional measure to use alongside clothing that covers the arms and legs. After returning home, wash your body and launder the clothes worn during the activity.\n\n### Preparation before activities\n\nBefore leaving, check that your clothing covers your skin and read the repellent label.\n\n1. Reduce skin exposure by wearing long sleeves and long pants.\n2. Wear socks and shoes that cover your feet.\n3. For farm work, prepare protective clothing suited to the task, such as gloves and boots.\n4. Secure sleeves and pant cuffs so that there are no gaps.\n5. Check which pests the repellent targets, the ages it is suitable for, and the directions for use.\n\n### Reducing contact with grass during activities\n\nDuring activities, keep bare skin and clothing from coming into direct contact with grass.\n\n1. Do not sit or lie directly on grass.\n2. Do not place clothing you have taken off on the grass.\n3. Use a mat when resting.\n4. Do not relieve yourself in grassy areas.\n5. Follow the product directions when reapplying repellent.\n\n### Washing and laundry after returning home\n\nShower immediately after returning home and wash the clothes worn during the activity.\n\n1. Remove the clothes worn during the activity and take a shower or bath.\n2. Check for skin changes, including in areas covered by clothing.\n3. Wash the clothes worn during the activity, underwear, and socks.\n4. If you later develop a fever or flu-like aches, also report your outdoor activity history.\n\n### Checking repellent labels\n\nRepellents must be used according to each product's approved instructions. For products sold in South Korea, check the container or packaging for the quasi-drug label. Follow the product instructions on where it can be applied and the ages it is suitable for.\n\nNot all products provide protection for the same length of time. Directions vary depending on the ingredients, their concentrations, and the target pests. Spraying more than the labeled amount does not guarantee effectiveness.\n\n## Preparing for a medical visit in different situations\n\nTell medical professionals the specific location and dates of your activities and when symptoms began. This makes the exposure circumstances clearer than simply saying that you went to the mountains. There is no need to delay a medical visit if you have no written record.\n\n| Information to provide | Details to prepare |\n| --- | --- |\n| Activity location | The area visited and the actual environment, such as a mountain, field, or grassy area |\n| Activity dates | Dates of visits and work, or the full period if activities lasted several days |\n| Activities | Clearing vegetation around graves, working in a vegetable garden, hiking, camping, etc. |\n| Symptom onset | The date you first noticed a fever or flu-like aches |\n| Skin changes | When and where you found a scab or rash |\n| Overseas travel | Countries and regions visited, and the length of your stay |\n\nFor example, if you developed a fever after working in a vegetable garden, record the work date and the date the fever began separately. If you discovered a black scab later, add the date you found it. Do not assume that the date you found the scab was the date you were bitten.\n\n## Common mistakes and principles of diagnosis and treatment\n\nA common mistake is deciding for yourself whether you are infected based on a single symptom or test. Medical professionals also consider other possible causes of fever. The necessary tests and treatment are determined by the examination findings.\n\n| Common interpretation | More accurate interpretation |\n| --- | --- |\n| No eschar means no infection | Some patients have no identifiable eschar |\n| A negative flu test means it is this disease | A negative flu test alone does not establish another cause of fever |\n| Using repellent means infection is impossible | Repellents do not prevent all bites |\n| Having showered means a later fever is unrelated | Medical care is needed if symptoms develop, even after preventive measures were taken at home |\n| There is no need to suspect it once autumn is over | Cases can occur outside the peak season |\n\nDiagnosis may involve blood tests or tests for the pathogen's genetic material. Selecting tests and interpreting the results requires medical judgment. Some tests may take time to produce results.\n\nTreatment uses antibiotics prescribed by a doctor. Depending on how strongly infection is suspected, treatment may begin before test results are available. Do not take leftover medication or choose a particular medicine on your own.\n\nDelayed treatment can lead to pneumonia or reduced kidney function. Severely ill patients may need hospital treatment. Seeking medical care early is a way to reduce these complications.\n\n## The difference between chigger counts and patient counts\n\nThe number of chiggers collected during surveillance is not the number of human cases. Vector surveillance examines the occurrence and density of chiggers at specific locations. Patient surveillance counts cases reported through medical facilities and other sources.\n\nThe August 2026 announcement includes surveillance results from the previous year in the Honam region. Surveillance from August to December 2025 took place over 16 weeks in 2 areas of the Honam region. A total of 1,822 chiggers were collected.\n\n| Figure in the data | What it represents | Limits of interpretation |\n| --- | --- | --- |\n| 1,822 chiggers | Vectors collected in the specified areas and period | Does not mean 1,822 patients |\n| Patient count, measured in people | People reported in the specified period and areas | Does not directly correspond to the number of chiggers collected |\n| Increase or decrease from the previous year | A change compared using the same criteria | The survey period and counting criteria need to be checked |\n\nThis also does not mean that every collected chigger carried the pathogen. The count alone cannot be used to calculate an individual's probability of infection. Whether patient numbers have increased this year must be checked using patient statistics for the same period.\n\n## Frequently asked questions\n\nNeither the presence or absence of an eschar nor whether preventive measures were taken is enough to determine whether someone is infected.\n\n### Does it spread through everyday contact between people?\n\nThis disease does not spread through ordinary person-to-person contact. The main route of infection is the bite of an infected chigger larva. People who were active in the same location may have shared the same exposure.\n\n### Are an eschar and a rash the same thing?\n\nAn eschar is a scab-like lesion that forms at the bite site. A rash is a skin change that appears on the trunk or limbs. The presence or absence of these two findings alone cannot confirm a diagnosis at home.\n\n### Can vaccination prevent it?\n\nThere is currently no generally available preventive vaccine. Prevention focuses on avoiding chigger bites. Wear clothing that covers the arms and legs, use repellent, and reduce contact with grass.\n\n### Can it be suspected after outdoor activities abroad?\n\nCases also occur in Southeast Asia, South Asia, northern Australia, and other areas. Peak seasons in tropical and subtropical regions may differ from those in South Korea. If you develop a fever after returning home, tell medical professionals where you traveled and for how long.","content_html":"\u003cp\u003eScrub typhus is an infectious disease caused by the bite of a chigger larva carrying the bacteria. The basis of prevention is reducing skin exposure during outdoor activities. Infection is still possible even if no black scab, known as an eschar, is visible. A fever after outdoor activities requires medical attention.\u003c/p\u003e\n\u003cp\u003eThe information on the peak season in South Korea and the numbers of chiggers collected is based on the Korea Disease Control and Prevention Agency's announcement of August 26, 2026.\u003c/p\u003e\n\u003ch2\u003e\n\u003ca href=\"#scrub-typhus-transmission-and-autumn-cases\" class=\"anchor\" id=\"scrub-typhus-transmission-and-autumn-cases\"\u003e\u003c/a\u003eScrub typhus transmission and autumn cases\u003c/h2\u003e\n\u003cp\u003eInfection occurs through the bite of a chigger larva carrying the pathogen. The pathogen responsible is the bacterium Orientia tsutsugamushi. The bacteria enter the body as the larva attaches to the skin and feeds on body fluids.\u003c/p\u003e\n\u003cp\u003eChiggers live in grassy areas and environments with shrubs. Exposure can occur not only during farm work but also while clearing vegetation around graves, hiking, or camping. It is important to identify activities that involved actual contact with grass rather than focusing on a person's occupation.\u003c/p\u003e\n\u003cp\u003eCases in South Korea are generally concentrated in \u003cstrong\u003eOctober to November\u003c/strong\u003e. This is when chigger larval activity overlaps with outdoor work during the harvest season. However, the disease is not limited to these two months in autumn.\u003c/p\u003e\n\u003cp\u003eThe Korea Disease Control and Prevention Agency's August 2026 guidance identifies October to November as the peak period for cases. Infection therefore cannot be ruled out simply because November has passed. In other countries, the peak season varies with the local climate.\u003c/p\u003e\n\u003ch2\u003e\n\u003ca href=\"#scrub-typhus-symptoms-and-when-to-seek-medical-care\" class=\"anchor\" id=\"scrub-typhus-symptoms-and-when-to-seek-medical-care\"\u003e\u003c/a\u003eScrub typhus symptoms and when to seek medical care\u003c/h2\u003e\n\u003cp\u003eTypical symptoms include fever, chills, headache, and muscle pain. A skin rash or swollen lymph nodes may also occur. Early symptoms alone make it difficult to distinguish the disease from a cold or other infections that cause fever.\u003c/p\u003e\n\u003cp\u003eThe National Health Information Portal states that the incubation period is within 10 days after a bite. The incubation period is the time between infection and the onset of symptoms. This period should not be used as a basis for diagnosing yourself at home or delaying medical care.\u003c/p\u003e\n\u003cp\u003eThe Honam Regional Center for Disease Control and Prevention's announcement, “Launch of Scrub Typhus Vector Surveillance in the Honam Region,” includes the following guidance.\u003c/p\u003e\n\u003cblockquote\u003e\n\u003cp\u003eIf you develop a fever after outdoor activities in autumn, visit a nearby medical facility for diagnosis and treatment.\u003c/p\u003e\n\u003c/blockquote\u003e\n\u003cp\u003eA fever or rash after outdoor activities requires prompt medical attention. Tell the medical team about your activities even if you do not remember being bitten by a mite. Difficulty breathing or reduced alertness requires emergency medical care.\u003c/p\u003e\n\u003cul\u003e\n\u003cli\u003eCommon symptoms that raise suspicion: fever, chills, headache, muscle pain, rash\u003c/li\u003e\n\u003cli\u003eInformation to check alongside symptoms: recent outdoor activities, skin changes, date symptoms began\u003c/li\u003e\n\u003cli\u003eWarning signs of a potentially severe condition: difficulty breathing, changes in consciousness\u003c/li\u003e\n\u003c/ul\u003e\n\u003ch2\u003e\n\u003ca href=\"#the-significance-and-limitations-of-an-eschar-in-scrub-typhus\" class=\"anchor\" id=\"the-significance-and-limitations-of-an-eschar-in-scrub-typhus\"\u003e\u003c/a\u003eThe significance and limitations of an eschar in scrub typhus\u003c/h2\u003e\n\u003cp\u003eAn eschar is a scab that forms when skin tissue at the bite site is damaged. In this disease, a black scab provides a diagnostic clue. It is a different skin change from a rash that spreads over the trunk or limbs.\u003c/p\u003e\n\u003cp\u003eEschars can form in hidden areas such as the armpits and groin. They may also occur in places that are difficult to check, such as the scalp or behind the ears. Looking only at the easily visible arms and legs is not enough to conclude that there is no eschar.\u003c/p\u003e\n\u003cp\u003eAn eschar is not found in every patient. Even if you find a black scab, that alone cannot confirm the diagnosis. Medical professionals assess activity history, symptoms, physical examination findings, and test results together.\u003c/p\u003e\n\u003cdiv class=\"overflow-x-auto\"\u003e\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eObservation\u003c/th\u003e\n\u003cth\u003eWhat it may indicate\u003c/th\u003e\n\u003cth\u003eJudgment to avoid\u003c/th\u003e\n\u003c/tr\u003e\n\u003c/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Observation\"\u003eFever and a black scab after outdoor activities\u003c/td\u003e\n\u003ctd data-label=\"What it may indicate\"\u003eA clue to infection that should be reported during a medical visit\u003c/td\u003e\n\u003ctd data-label=\"Judgment to avoid\"\u003eConfirming the diagnosis from a photo alone\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Observation\"\u003eFever alone after outdoor activities\u003c/td\u003e\n\u003ctd data-label=\"What it may indicate\"\u003eInfection needs to be considered even without an eschar\u003c/td\u003e\n\u003ctd data-label=\"Judgment to avoid\"\u003eAssuming it must be a cold because there is no scab\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Observation\"\u003eA black scab alone\u003c/td\u003e\n\u003ctd data-label=\"What it may indicate\"\u003eThe cause of the skin lesion needs to be checked\u003c/td\u003e\n\u003ctd data-label=\"Judgment to avoid\"\u003eTreating every black scab as the same infectious disease\u003c/td\u003e\n\u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\u003c/div\u003e\n\u003ch2\u003e\n\u003ca href=\"#scrub-typhus-prevention-before-and-after-activities\" class=\"anchor\" id=\"scrub-typhus-prevention-before-and-after-activities\"\u003e\u003c/a\u003eScrub typhus prevention before and after activities\u003c/h2\u003e\n\u003cp\u003eThe key to prevention is reducing opportunities for chiggers to come into contact with the skin. Repellents are an additional measure to use alongside clothing that covers the arms and legs. After returning home, wash your body and launder the clothes worn during the activity.\u003c/p\u003e\n\u003ch3\u003e\n\u003ca href=\"#preparation-before-activities\" class=\"anchor\" id=\"preparation-before-activities\"\u003e\u003c/a\u003ePreparation before activities\u003c/h3\u003e\n\u003cp\u003eBefore leaving, check that your clothing covers your skin and read the repellent label.\u003c/p\u003e\n\u003col\u003e\n\u003cli\u003eReduce skin exposure by wearing long sleeves and long pants.\u003c/li\u003e\n\u003cli\u003eWear socks and shoes that cover your feet.\u003c/li\u003e\n\u003cli\u003eFor farm work, prepare protective clothing suited to the task, such as gloves and boots.\u003c/li\u003e\n\u003cli\u003eSecure sleeves and pant cuffs so that there are no gaps.\u003c/li\u003e\n\u003cli\u003eCheck which pests the repellent targets, the ages it is suitable for, and the directions for use.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch3\u003e\n\u003ca href=\"#reducing-contact-with-grass-during-activities\" class=\"anchor\" id=\"reducing-contact-with-grass-during-activities\"\u003e\u003c/a\u003eReducing contact with grass during activities\u003c/h3\u003e\n\u003cp\u003eDuring activities, keep bare skin and clothing from coming into direct contact with grass.\u003c/p\u003e\n\u003col\u003e\n\u003cli\u003eDo not sit or lie directly on grass.\u003c/li\u003e\n\u003cli\u003eDo not place clothing you have taken off on the grass.\u003c/li\u003e\n\u003cli\u003eUse a mat when resting.\u003c/li\u003e\n\u003cli\u003eDo not relieve yourself in grassy areas.\u003c/li\u003e\n\u003cli\u003eFollow the product directions when reapplying repellent.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch3\u003e\n\u003ca href=\"#washing-and-laundry-after-returning-home\" class=\"anchor\" id=\"washing-and-laundry-after-returning-home\"\u003e\u003c/a\u003eWashing and laundry after returning home\u003c/h3\u003e\n\u003cp\u003eShower immediately after returning home and wash the clothes worn during the activity.\u003c/p\u003e\n\u003col\u003e\n\u003cli\u003eRemove the clothes worn during the activity and take a shower or bath.\u003c/li\u003e\n\u003cli\u003eCheck for skin changes, including in areas covered by clothing.\u003c/li\u003e\n\u003cli\u003eWash the clothes worn during the activity, underwear, and socks.\u003c/li\u003e\n\u003cli\u003eIf you later develop a fever or flu-like aches, also report your outdoor activity history.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch3\u003e\n\u003ca href=\"#checking-repellent-labels\" class=\"anchor\" id=\"checking-repellent-labels\"\u003e\u003c/a\u003eChecking repellent labels\u003c/h3\u003e\n\u003cp\u003eRepellents must be used according to each product's approved instructions. For products sold in South Korea, check the container or packaging for the quasi-drug label. Follow the product instructions on where it can be applied and the ages it is suitable for.\u003c/p\u003e\n\u003cp\u003eNot all products provide protection for the same length of time. Directions vary depending on the ingredients, their concentrations, and the target pests. Spraying more than the labeled amount does not guarantee effectiveness.\u003c/p\u003e\n\u003ch2\u003e\n\u003ca href=\"#preparing-for-a-medical-visit-in-different-situations\" class=\"anchor\" id=\"preparing-for-a-medical-visit-in-different-situations\"\u003e\u003c/a\u003ePreparing for a medical visit in different situations\u003c/h2\u003e\n\u003cp\u003eTell medical professionals the specific location and dates of your activities and when symptoms began. This makes the exposure circumstances clearer than simply saying that you went to the mountains. There is no need to delay a medical visit if you have no written record.\u003c/p\u003e\n\u003cdiv class=\"overflow-x-auto\"\u003e\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eInformation to provide\u003c/th\u003e\n\u003cth\u003eDetails to prepare\u003c/th\u003e\n\u003c/tr\u003e\n\u003c/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Information to provide\"\u003eActivity location\u003c/td\u003e\n\u003ctd data-label=\"Details to prepare\"\u003eThe area visited and the actual environment, such as a mountain, field, or grassy area\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Information to provide\"\u003eActivity dates\u003c/td\u003e\n\u003ctd data-label=\"Details to prepare\"\u003eDates of visits and work, or the full period if activities lasted several days\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Information to provide\"\u003eActivities\u003c/td\u003e\n\u003ctd data-label=\"Details to prepare\"\u003eClearing vegetation around graves, working in a vegetable garden, hiking, camping, etc.\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Information to provide\"\u003eSymptom onset\u003c/td\u003e\n\u003ctd data-label=\"Details to prepare\"\u003eThe date you first noticed a fever or flu-like aches\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Information to provide\"\u003eSkin changes\u003c/td\u003e\n\u003ctd data-label=\"Details to prepare\"\u003eWhen and where you found a scab or rash\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Information to provide\"\u003eOverseas travel\u003c/td\u003e\n\u003ctd data-label=\"Details to prepare\"\u003eCountries and regions visited, and the length of your stay\u003c/td\u003e\n\u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\u003c/div\u003e\n\u003cp\u003eFor example, if you developed a fever after working in a vegetable garden, record the work date and the date the fever began separately. If you discovered a black scab later, add the date you found it. Do not assume that the date you found the scab was the date you were bitten.\u003c/p\u003e\n\u003ch2\u003e\n\u003ca href=\"#common-mistakes-and-principles-of-diagnosis-and-treatment\" class=\"anchor\" id=\"common-mistakes-and-principles-of-diagnosis-and-treatment\"\u003e\u003c/a\u003eCommon mistakes and principles of diagnosis and treatment\u003c/h2\u003e\n\u003cp\u003eA common mistake is deciding for yourself whether you are infected based on a single symptom or test. Medical professionals also consider other possible causes of fever. The necessary tests and treatment are determined by the examination findings.\u003c/p\u003e\n\u003cdiv class=\"overflow-x-auto\"\u003e\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eCommon interpretation\u003c/th\u003e\n\u003cth\u003eMore accurate interpretation\u003c/th\u003e\n\u003c/tr\u003e\n\u003c/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Common interpretation\"\u003eNo eschar means no infection\u003c/td\u003e\n\u003ctd data-label=\"More accurate interpretation\"\u003eSome patients have no identifiable eschar\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Common interpretation\"\u003eA negative flu test means it is this disease\u003c/td\u003e\n\u003ctd data-label=\"More accurate interpretation\"\u003eA negative flu test alone does not establish another cause of fever\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Common interpretation\"\u003eUsing repellent means infection is impossible\u003c/td\u003e\n\u003ctd data-label=\"More accurate interpretation\"\u003eRepellents do not prevent all bites\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Common interpretation\"\u003eHaving showered means a later fever is unrelated\u003c/td\u003e\n\u003ctd data-label=\"More accurate interpretation\"\u003eMedical care is needed if symptoms develop, even after preventive measures were taken at home\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Common interpretation\"\u003eThere is no need to suspect it once autumn is over\u003c/td\u003e\n\u003ctd data-label=\"More accurate interpretation\"\u003eCases can occur outside the peak season\u003c/td\u003e\n\u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\u003c/div\u003e\n\u003cp\u003eDiagnosis may involve blood tests or tests for the pathogen's genetic material. Selecting tests and interpreting the results requires medical judgment. Some tests may take time to produce results.\u003c/p\u003e\n\u003cp\u003eTreatment uses antibiotics prescribed by a doctor. Depending on how strongly infection is suspected, treatment may begin before test results are available. Do not take leftover medication or choose a particular medicine on your own.\u003c/p\u003e\n\u003cp\u003eDelayed treatment can lead to pneumonia or reduced kidney function. Severely ill patients may need hospital treatment. Seeking medical care early is a way to reduce these complications.\u003c/p\u003e\n\u003ch2\u003e\n\u003ca href=\"#the-difference-between-chigger-counts-and-patient-counts\" class=\"anchor\" id=\"the-difference-between-chigger-counts-and-patient-counts\"\u003e\u003c/a\u003eThe difference between chigger counts and patient counts\u003c/h2\u003e\n\u003cp\u003eThe number of chiggers collected during surveillance is not the number of human cases. Vector surveillance examines the occurrence and density of chiggers at specific locations. Patient surveillance counts cases reported through medical facilities and other sources.\u003c/p\u003e\n\u003cp\u003eThe August 2026 announcement includes surveillance results from the previous year in the Honam region. Surveillance from August to December 2025 took place over 16 weeks in 2 areas of the Honam region. A total of 1,822 chiggers were collected.\u003c/p\u003e\n\u003cdiv class=\"overflow-x-auto\"\u003e\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eFigure in the data\u003c/th\u003e\n\u003cth\u003eWhat it represents\u003c/th\u003e\n\u003cth\u003eLimits of interpretation\u003c/th\u003e\n\u003c/tr\u003e\n\u003c/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Figure in the data\"\u003e1,822 chiggers\u003c/td\u003e\n\u003ctd data-label=\"What it represents\"\u003eVectors collected in the specified areas and period\u003c/td\u003e\n\u003ctd data-label=\"Limits of interpretation\"\u003eDoes not mean 1,822 patients\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Figure in the data\"\u003ePatient count, measured in people\u003c/td\u003e\n\u003ctd data-label=\"What it represents\"\u003ePeople reported in the specified period and areas\u003c/td\u003e\n\u003ctd data-label=\"Limits of interpretation\"\u003eDoes not directly correspond to the number of chiggers collected\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Figure in the data\"\u003eIncrease or decrease from the previous year\u003c/td\u003e\n\u003ctd data-label=\"What it represents\"\u003eA change compared using the same criteria\u003c/td\u003e\n\u003ctd data-label=\"Limits of interpretation\"\u003eThe survey period and counting criteria need to be checked\u003c/td\u003e\n\u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\u003c/div\u003e\n\u003cp\u003eThis also does not mean that every collected chigger carried the pathogen. The count alone cannot be used to calculate an individual's probability of infection. Whether patient numbers have increased this year must be checked using patient statistics for the same period.\u003c/p\u003e\n\u003ch2\u003e\n\u003ca href=\"#frequently-asked-questions\" class=\"anchor\" id=\"frequently-asked-questions\"\u003e\u003c/a\u003eFrequently asked questions\u003c/h2\u003e\n\u003cp\u003eNeither the presence or absence of an eschar nor whether preventive measures were taken is enough to determine whether someone is infected.\u003c/p\u003e\n\u003ch3\u003e\n\u003ca href=\"#does-it-spread-through-everyday-contact-between-people\" class=\"anchor\" id=\"does-it-spread-through-everyday-contact-between-people\"\u003e\u003c/a\u003eDoes it spread through everyday contact between people?\u003c/h3\u003e\n\u003cp\u003eThis disease does not spread through ordinary person-to-person contact. The main route of infection is the bite of an infected chigger larva. People who were active in the same location may have shared the same exposure.\u003c/p\u003e\n\u003ch3\u003e\n\u003ca href=\"#are-an-eschar-and-a-rash-the-same-thing\" class=\"anchor\" id=\"are-an-eschar-and-a-rash-the-same-thing\"\u003e\u003c/a\u003eAre an eschar and a rash the same thing?\u003c/h3\u003e\n\u003cp\u003eAn eschar is a scab-like lesion that forms at the bite site. A rash is a skin change that appears on the trunk or limbs. The presence or absence of these two findings alone cannot confirm a diagnosis at home.\u003c/p\u003e\n\u003ch3\u003e\n\u003ca href=\"#can-vaccination-prevent-it\" class=\"anchor\" id=\"can-vaccination-prevent-it\"\u003e\u003c/a\u003eCan vaccination prevent it?\u003c/h3\u003e\n\u003cp\u003eThere is currently no generally available preventive vaccine. Prevention focuses on avoiding chigger bites. Wear clothing that covers the arms and legs, use repellent, and reduce contact with grass.\u003c/p\u003e\n\u003ch3\u003e\n\u003ca href=\"#can-it-be-suspected-after-outdoor-activities-abroad\" class=\"anchor\" id=\"can-it-be-suspected-after-outdoor-activities-abroad\"\u003e\u003c/a\u003eCan it be suspected after outdoor activities abroad?\u003c/h3\u003e\n\u003cp\u003eCases also occur in Southeast Asia, South Asia, northern Australia, and other areas. Peak seasons in tropical and subtropical regions may differ from those in South Korea. If you develop a fever after returning home, tell medical professionals where you traveled and for how long.\u003c/p\u003e\n","tags":["Infectious disease surveillance","Scrub typhus","Outdoor activities"],"faqs":[{"question":"Does the absence of a black scab mean there is no infection?","answer":"Infection is still possible even if no eschar is found. It may be in a covered area of the body and go unnoticed. If a fever develops after outdoor activities, medical care is needed regardless of whether an eschar is present."},{"question":"When do symptoms appear after a bite?","answer":"The National Health Information Portal states that the incubation period is within 10 days of a bite. The incubation period is the time between infection and the start of symptoms. Do not rule out infection or delay medical care based on dates alone."},{"question":"Can symptoms distinguish it from a cold or the flu?","answer":"It is difficult to distinguish them based on fever, headache, and muscle pain alone. A negative flu test does not confirm another illness. Medical professionals assess activity history, examination findings, and any necessary tests together."},{"question":"How does an eschar differ from a rash?","answer":"An eschar is a scab-like lesion that forms at the bite site. A rash is a skin change that appears on the trunk or limbs. Both help with diagnosis, but neither is enough on its own to confirm a diagnosis."},{"question":"Can repellent alone prevent infection?","answer":"Repellents do not completely prevent tick bites. They should be combined with wearing long clothing and reducing contact with grassy areas. Follow the product label for the ages it can be used on and how to reapply it."},{"question":"What should I do if I develop a fever after showering when I get home?","answer":"Showering alone cannot rule out the possibility of infection. If a fever develops, seek care at a medical facility. Tell them the location and date of your activities and the day your symptoms started."},{"question":"How is it treated?","answer":"It is treated with antibiotics prescribed by a doctor. The choice of medication and duration of treatment depend on the patient's condition. Do not take leftover antibiotics on your own."},{"question":"Is there a vaccine?","answer":"There is currently no generally available vaccine. Avoiding chigger bites is the basis of prevention."},{"question":"Can I catch it by living with a patient?","answer":"This disease does not spread from person to person through ordinary daily contact. However, if you were active in the same outdoor environment, each of you may have been exposed to chiggers."},{"question":"If the number of chiggers collected increases, does the number of patients increase at the same rate?","answer":"The number collected and the number of patients are different surveillance indicators. The number collected alone cannot be used to calculate the rate of increase in patients or an individual's likelihood of infection. Increases or decreases in patient numbers must be checked using reported case statistics for the same period."}],"sources":[{"url":"https://health.kdca.go.kr/healthinfo/biz/health/gnrlzHealthInfo/gnrlzHealthInfo/gnrlzHealthInfoView.do?cntnts_sn=5261","title":"Korea Disease Control and Prevention Agency National Health Information Portal, Scrub Typhus","type":"source"},{"url":"https://www.kdca.go.kr/bbs/honam/143/309309/download.do","title":"Honam Regional Center for Disease Control and Prevention, Scrub Typhus Vector Surveillance Begins in the Honam Region, August 26, 2026","type":"data_point"},{"url":"https://kdca.go.kr/bbs/kdca/42/309808/download.do","title":"Korea Disease Control and Prevention Agency September 20, 2026 press release, Infectious Disease Prevention Guidelines for the Chuseok Holiday","type":"source"},{"url":"https://www.cdc.gov/typhus/about/scrub.html","title":"CDC, About Scrub Typhus","type":"source"},{"url":"https://www.cdc.gov/typhus/hcp/clinical-overview/clinical-overview-of-scrub-typhus.html","title":"CDC, Clinical Overview of Scrub Typhus","type":"source"},{"url":"https://www.kha.or.kr/kha_daegu/daegu-notice.do?articleNo=46622\u0026attachNo=424821\u0026mode=download","title":"Korea Disease Control and Prevention Agency, Overview and Proper Use of Tick Repellents, version posted by the Korean Hospital Association","type":"source"}],"images":[{"id":2049,"url":"https://injoys.com/rails/active_storage/blobs/proxy/eyJfcmFpbHMiOnsiZGF0YSI6MzE1NDcsInB1ciI6ImJsb2JfaWQifX0=--aa9b1dd15b711b5b52834d860c19d92f55bccf5a/ai-fd128e37.webp","is_representative":true,"generation_method":"ai_photo","license":"ai_generated","mime_type":"image/webp","width":1536,"height":1024,"translations":{"ko":{"alt":"진료대에 앉은 노년 남성의 팔에 생긴 작은 검은 딱지를 의료진이 살펴보고 있다.","caption":"가피는 쯔쯔가무시증의 진단 단서지만, 보이지 않는다고 감염을 배제할 수는 없다.","description":null},"en":{"alt":"A clinician examines a small black scab on the forearm of an older man seated on an examination couch.","caption":"An eschar is a clue to scrub typhus, but its absence does not rule out infection.","description":null},"ja":{"alt":"診察台に座る高齢男性の前腕にできた小さな黒いかさぶたを医療者が確認している。","caption":"黒いかさぶたはつつが虫病の診断の手がかりですが、見当たらなくても感染は否定できません。","description":null},"es":{"alt":"Una médica examina una pequeña costra negra en el antebrazo de un hombre mayor sentado en una camilla.","caption":"La escara es una pista para diagnosticar el tifus de los matorrales, pero su ausencia no descarta la infección.","description":null},"id":{"alt":"Seorang dokter memeriksa keropeng hitam kecil di lengan bawah pria lansia yang duduk di ranjang pemeriksaan.","caption":"Eskar merupakan petunjuk diagnosis tifus semak, tetapi ketiadaannya tidak menyingkirkan kemungkinan infeksi.","description":null},"pt":{"alt":"Uma médica examina uma pequena crosta preta no antebraço de um homem idoso sentado numa maca.","caption":"A escara é uma pista para o diagnóstico do tifo do mato, mas sua ausência não descarta a infecção.","description":null},"zh-hant":{"alt":"一名年長男子坐在診療床上，醫護人員正檢查他前臂上的小塊黑色痂皮。","caption":"焦痂是診斷恙蟲病的線索，但未發現焦痂也不能排除感染。","description":null},"de":{"alt":"Eine Ärztin untersucht eine kleine schwarze Kruste am Unterarm eines älteren Mannes auf einer Untersuchungsliege.","caption":"Ein Eschar ist ein Hinweis auf Tsutsugamushi-Fieber, doch sein Fehlen schließt eine Infektion nicht aus.","description":null}}},{"id":2050,"url":"https://injoys.com/rails/active_storage/blobs/proxy/eyJfcmFpbHMiOnsiZGF0YSI6MzE1NTMsInB1ciI6ImJsb2JfaWQifX0=--142048050dc8e019071cfa6e1a5623da1dba0291/ai-8b3004c3.webp","is_representative":false,"generation_method":"ai_semi","license":"ai_generated","mime_type":"image/webp","width":1536,"height":1024,"translations":{"ko":{"alt":"가을 풍경이 보이는 다용도실에서 중년 여성이 흙 묻은 작업복을 드럼세탁기에 넣고 있다.","caption":"야외활동 후 귀가하면 입었던 옷을 세탁하는 것이 쯔쯔가무시증 예방의 기본이다.","description":null},"en":{"alt":"A middle-aged woman loads muddy work clothes into a front-loading washer, with autumn trees outside.","caption":"Washing worn clothing after returning from outdoor activities is a basic step in preventing scrub typhus.","description":null},"ja":{"alt":"紅葉が見える家の洗濯スペースで、中年の女性が泥のついた作業着をドラム式洗濯機に入れている。","caption":"野外活動から帰宅したら、着ていた衣類を洗濯することがつつが虫病予防の基本です。","description":null},"es":{"alt":"Una mujer de mediana edad mete ropa de trabajo embarrada en una lavadora, con árboles otoñales al fondo.","caption":"Lavar la ropa usada al volver de actividades al aire libre es una medida básica para prevenir el tifus de los matorrales.","description":null},"id":{"alt":"Seorang perempuan paruh baya memasukkan pakaian kerja berlumpur ke mesin cuci, dengan pepohonan musim gugur di luar.","caption":"Mencuci pakaian yang dikenakan setelah pulang dari aktivitas luar ruangan merupakan langkah dasar pencegahan tifus semak.","description":null},"pt":{"alt":"Uma mulher de meia-idade coloca roupas de trabalho enlameadas na máquina de lavar, com árvores outonais ao fundo.","caption":"Lavar as roupas usadas ao voltar de atividades ao ar livre é uma medida básica para prevenir o tifo do mato.","description":null},"zh-hant":{"alt":"一名中年女子在可見窗外秋景的家中洗衣空間，將沾滿泥土的工作服放入滾筒洗衣機。","caption":"戶外活動返家後清洗穿過的衣物，是預防恙蟲病的基本措施。","description":null},"de":{"alt":"Eine Frau mittleren Alters lädt schlammige Arbeitskleidung in eine Waschmaschine; draußen stehen herbstliche Bäume.","caption":"Nach Aktivitäten im Freien die getragene Kleidung zu waschen, gehört zur grundlegenden Vorbeugung gegen Tsutsugamushi-Fieber.","description":null}}}],"published_at":"2026-10-22T18:10:42+09:00","updated_at":"2026-10-22T18:10:42+09:00","license":"cc_by","translation_status":"reviewed","available_locales":["ko","en","ja","es"],"data_locales":["ko","en","ja","es","id","pt","zh-hant","de"],"url":"https://injoys.com/en/articles/scrub-typhus-autumn-prevention-eschar"}