{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,18]],"date-time":"2026-08-18T05:32:47Z","timestamp":1787031167884,"version":"build-2736575974"},"reference-count":26,"publisher":"American Society of Tropical Medicine and Hygiene","issue":"3","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2017,9,7]]},"abstract":"<jats:p>\n                    We conducted this study to explore the extent of occult helminth infection identified by fecal parasitological examinations or organ-specific examinations such as colonoscopy and abdominal ultrasonography (US) during health checkups. We analyzed 197,422 fecal samples from 99,451 subjects who received health checkups at a single center over 10 years. We found that 3,472 (1.8%) samples from 3,342 (3.4%) subjects tested positive for parasitic ova, including clonorchiasis, metagonimiasis, trichuriasis, ascariasis, trichostrongylosis, taeniasis, and enterobiasis. The detection rate for clonorchiasis was higher in those who were taking their first examination than in those who had been examined previously. The detection rate for clonorchiasis decreased gradually over the 10 years. Only 2.5% of the patients with clonorchiasis showed US or computed tomography (CT) images that were compatible with the disease. Clonorchiasis patients who had abdominal US or CT images that suggested clonorchiasis were older and had lower body mass indices and higher eosinophil counts than did those whose US or CT images did not suggest the disease. We observed worms in 9% of the patients with trichuriasis who had received a colonoscopy. Colonoscopy also uncovered adult worms in 0.03% of subjects who were not identified as having\n                    <jats:italic>Trichuris trichiura<\/jats:italic>\n                    ova in their fecal helminth examinations. In summary, our study shows that occult helminth infection is fairly frequently identified by a variety of methods during health checkups, which suggests that doctors need to make greater effort to identify and treat occult helminth infections in Korea.\n                  <\/jats:p>","DOI":"10.4269\/ajtmh.17-0084","type":"journal-article","created":{"date-parts":[[2017,7,25]],"date-time":"2017-07-25T03:00:51Z","timestamp":1500951651000},"page":"888-895","source":"Crossref","is-referenced-by-count":3,"title":["Identifying Helminth Infections via Routine Fecal Parasitological Examinations in Korea"],"prefix":"10.4269","volume":"97","author":[{"given":"Seung Ho","family":"Choi","sequence":"first","affiliation":[{"name":"Department of Internal Medicine, Healthcare System Gangnam Center, Seoul National University Hospital, Seoul, Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Changhyun","family":"Lee","sequence":"additional","affiliation":[{"name":"Department of Internal Medicine, Healthcare System Gangnam Center, Seoul National University Hospital, Seoul, Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jong In","family":"Yang","sequence":"additional","affiliation":[{"name":"Department of Internal Medicine, Healthcare System Gangnam Center, Seoul National University Hospital, Seoul, Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Min-Sun","family":"Kwak","sequence":"additional","affiliation":[{"name":"Department of Internal Medicine, Healthcare System Gangnam Center, Seoul National University Hospital, Seoul, Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Goh Eun","family":"Chung","sequence":"additional","affiliation":[{"name":"Department of Internal Medicine, Healthcare System Gangnam Center, Seoul National University Hospital, Seoul, Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hae Yeon","family":"Kang","sequence":"additional","affiliation":[{"name":"Department of Internal Medicine, Healthcare System Gangnam Center, Seoul National University Hospital, Seoul, Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Su Jin","family":"Chung","sequence":"additional","affiliation":[{"name":"Department of Internal Medicine, Healthcare System Gangnam Center, Seoul National University Hospital, Seoul, Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jeong Yoon","family":"Yim","sequence":"additional","affiliation":[{"name":"Department of Internal Medicine, Healthcare System Gangnam Center, Seoul National University Hospital, Seoul, Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Joo Sung","family":"Kim","sequence":"additional","affiliation":[{"name":"Department of Internal Medicine, Healthcare System Gangnam Center, Seoul National University Hospital, Seoul, Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"2795","reference":[{"key":"b1","series-title":"Trop Biomed","first-page":"190","article-title":"Prevalence of intestinal parasitic infections among communities living in different habitats and its comparison with one hundred and one studies conducted over the past 42 years (1970 to 2013) in Malaysia","volume":"31","author":"Sinniah","year":"2014"},{"key":"b2","series-title":"Korean J Parasitol","first-page":"37","article-title":"A nationwide survey on the prevalence of intestinal parasitic infections in the Republic of Korea, 2004","volume":"47","author":"Kim","year":"2009"},{"key":"b3","series-title":"Lancet Oncol","first-page":"321","article-title":"A review of human carcinogens\u2013Part B: biological agents","volume":"10","author":"Bouvard","year":"2009"},{"key":"b4","series-title":"Am J Trop Med Hyg","first-page":"93","article-title":"Clonorchis sinensis infection and increasing risk of cholangiocarcinoma in 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repeated praziquantel treatment and low diagnostic efficacy of sonography","volume":"36","author":"Hong","year":"1998"},{"key":"b15","series-title":"Immunol Allergy Clin North Am","first-page":"529","article-title":"Evaluation and differential diagnosis of marked, persistent eosinophilia","volume":"27","author":"Nutman","year":"2007"},{"key":"b16","series-title":"Gastrointest Endosc","first-page":"154","article-title":"Accidental diagnosis of Trichuris trichiura by colonoscopy","volume":"68","author":"Chang","year":"2008"},{"key":"b17","series-title":"Int J Infect Dis","first-page":"e1073","article-title":"Trichuriasis diagnosed by colonoscopy: case report and review of the literature spanning 22 years in mainland China","volume":"17","author":"Wang","year":"2013"},{"key":"b18","series-title":"Korean J Parasitol","first-page":"75","article-title":"Intestinal helminthic infections diagnosed by colonoscopy in a regional hospital during 2001\u20132008","volume":"48","author":"Do","year":"2010"},{"key":"b19","series-title":"Trop Med Int Health","first-page":"1096","article-title":"Control of clonorchiasis in Korea: effectiveness of health education for community leaders and individuals in an endemic area","volume":"19","author":"Oh","year":"2014"},{"key":"b20","series-title":"Immunol Allergy Clin North Am","first-page":"493","article-title":"Eosinophilia in infectious diseases","volume":"35","author":"O\u2019Connell","year":"2015"},{"key":"b21","series-title":"Int J Parasitol","first-page":"1233","article-title":"Fish-borne parasitic zoonoses: status and issues","volume":"35","author":"Chai","year":"2005"},{"key":"b22","series-title":"Korean J Parasitol","first-page":"215","article-title":"Prevalence of Clonorchis sinensis infection among residents along 5 major rivers in the Republic of Korea","volume":"54","author":"Jeong","year":"2016"},{"key":"b23","series-title":"Acta 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