• Parasites, Hosts and Diseases
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• 제32권4호
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• pp.267-270
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• 1994

충청북도 중원군 달천강 유역 주민의 기생충 감염상을 알아보기 위하여 1993년 8월부터 9월까지 이류면 수주리 마을주민 67명을 대상으로 대변검사를 실시하고. 감염원 조사를 위하여 마을앞 달천강 상류지역의 담수어를 투망으로 채질하여 조사하였다. 조사결과 간흡충 양성자가 67명중 22명 (32.8%)이었고 메타고니무스 양성자가 14명(20.9%)이었다 조사한 담수어 17종중 간흡충은 14종이, 메타고니무스는 13종이 감염되어 있었다. 간흡충의 경우 큰납지리, 모래무지. 꼬치동자개. 눈동자개 등이 높은 감염률을 보였고, 메타고니무스의 경우는 참마자, 큰납지리. 모래무지 피라미 등이 높은 감염률을 보였다. 메타고니무스 양성자로부터 회수한 성충은 Miyata형이었고 피라미에서 얻은 피낭유충을 마우스에 실험감염시켜 회수한 성충도 역시 Miyata형이었다. 위의 결과로 달천강 유역에 담수어를 매개로 한 간흡충과 메타고니무스(Miyata형) 감염이 고율로 유행함을 확인하였다.

• Parasites, Hosts and Diseases
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• 제49권4호
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• pp.409-412
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• 2011

In Korea. many people enjoy eating raw or underkooked freshwater crayfish and crabs which unfortunately may cause paragonimiasis. Here, we describe a case of pulmonary and abdominal paragonimiasis in a 9-year-old girl, who presented with a 1-month history of abdominal pain, especially in the right flank and the right inguinal area, with anorexia. A chest radiograph revealed pleural effusion in both lungs, and her abdominal sonography indicated an inflammatory lesion in the right psoas muscle. Peripheral blood analysis of the patient showed hypereosinophilia (66.0%) and an elevated total serum lgE level (>2,500 IU/ml). The pleural effusion tested by ELISA were also positive for antibodies against paragonimiasis. Her dietary history stated that she had ingested raw freshwater crab, 4 months previously. The diagnosis was pulmonary paragonimiasis accompanied by abdominal muscle involvement. She was improved after 5 cycles of praziquantel treatment and 2 times of pleural effusion drainage. In conclusion, herein, we report a case of pulmonary and abdominal paragonimiasis in a girl who presented with abdominal pain and tenderness in the inguinal area.

• Asian Pacific Journal of Cancer Prevention
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• 제16권17호
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• pp.7803-7807
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• 2015

Opisthorchis viverrini infection is a serious public health problem in Southeast Asia especially in the northeast and north of Thailand. Therefore, a cross-sectional survey using multistage sampling was conducted from the rural communities of Surin province, Thailand, during September 2013 to July 2014. O. viverrini infection was determined using Kato's thick smear technique. Socio-demographic, information resources, and history data were collected using predesigned semi-structured questionnaires. A total of 510 participants completed interviews and had stools collected. Some 32 (6.47%) participants were infected with O. viverrini. The rate was slightly higehr in males (6.61%) than females (6.32%). High frequencies were found in the age groups 61-70 (19.4%) and 71-80 years (19.4%), those involved in agriculture (10.5%), and in primary school (10.3%). The distribution of high infection was found in Tha Tum (16.7%) and Sankha district (16.7%), followed by Samrong Thap (13.3%), Si Narong (13.33%), and Buachet district (13.33%). Chi-square testing indicated that age (61-70 and 71-80 year old), education (primary school) and occupation (agriculture), were significantly associated with O. viverrini infection (p-value<0.05). Of 72.6% participants who had past histories with stool examination, 17.0% of them had been infected with O. viverrini and 43.2% treated with praziquantel. This finding confirmed that O. viverrini is still a problem in Surin province, Thailand, and therefore, interventions are urgently required for mass treatment and health education implementation.

• Pediatric Infection and Vaccine
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• 제8권1호
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• pp.129-133
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• 2001

기생충 감염이 거의 없는 최근, 저자들은 5세 여아에서 소아에서는 드문 광절열두조충 감염을 경험하였기에 문헌 고찰과 함께 보고하는 바이며, 생선회의 소비가 급증하고 쉽게 사먹을 수 있는 시장의 형성으로 환자의 증가가 예상되어 전국민적인 보건교육과 함께 비특이적 소화기 증상을 가진 환아에 대한 소아과 의사들의 자세한 문진과 의심이 요구된다고 본다.

• Parasites, Hosts and Diseases
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• 제44권1호
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• pp.1-5
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• 2006

One coastal village in Haenam-gun and two in Yeongam-gun, Jeollanam-do were surveyed for intestinal parasite infections by fecal examination. The egg positive rates of Gymnophalloides seoi were high, $24.1\%$ (14/58) in Haenam-gun and $9.3\%$ (11/118) in Yeongam-gun. The egg positive rates of heterophyids, including Heterophyes nocens, and of Clonorchis sinensis were $10.3\%\;and\;6.9\%$ in Haenam-gun, and $14.4\%\;and\;8.5\%$ in Yeongam-gun, respectively. After praziquantel treatment and purgation, a total of 37,761 fluke specimens were recovered from 17 patients; 11 in Haenam-gun and 6 in Yeongam-gun. Gymnophalloides seoi was the most commonly recovered species, with 37,489 specimens in total (2,205 per person). Other recovered flukes included Heterophyes nocens, Stictodora fuscata, Heterophyopsis continua, Pygidiopsis sUmma, and undetermined species. These results indicate that the areas surveyed are new endemic foci of G. seoi.

• 한국임상수의학회지
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• 제37권2호
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• pp.106-108
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• 2020

An eight-month-old, outdoor, intact male English Pointer dog weighing 23.5 kg presented to the hospital with signs of hematochezia, soft stools, and weight-loss. There were no remarkable findings on physical examination, complete blood count, serum biochemistry, electrolyte and gas analysis, and radiography. The serologic and Polymerase Chain Reaction (PCR) tests for canine parvovirus were negative. A fecal smear examination showed rod-shaped, sporeforming bacteria. Additionally, a fecal flotation test showed ova of Ancylostoma spp. The size of ova was 60 × 40 ㎛, and it was identified as Ancylostoma caninum using light microscopy. The PCR test indicated a Clostridial perfringens infection and the presence of C. perfringens alpha toxin. The diagnosis given was C. perfringens enterotoxicosis with ancylostomiasis. Treatment included antibiotics (metronidazole, trimethoprim-sulfamethoxazole) and anthelmintics (afoxolaner, milbemycin oxime). After two weeks, the clostridial infection resolved, but ancylostomiasis persisted for six weeks. The anthelmintic was changed to Drontal^â plus (praziquantel/pyrantel pamoate/febantel). After four weeks, there were no remarkable findings in the fecal samples, but the patient still presented with watery stools and hematochezia. Survey of abdominal ultrasound had performed, and a target-like sign with multiple rings was seen in the cecocolic region. The patient was diagnosed with A. caninum-induced cecocolic intussusception from the history and clinical signs. After a surgery, he recovered fully. This is the first clinical case report of Ancylostoma caninum parasitizing from the small intestine and causing an intussusception in the large intestine.

• Parasites, Hosts and Diseases
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• 제58권4호
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• pp.431-443
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• 2020

Echinostoma mekongi n. sp. (Digenea: Echinostomatidae) is described based on adult flukes collected from humans residing along the Mekong River in Cambodia. Total 256 flukes were collected from the diarrheic stool of 6 echinostome egg positive villagers in Kratie and Takeo Province after praziquantel treatment and purging. Adults of the new species were 9.0-13.1 (av. 11.3) mm in length and 1.3-2.5 (1.9) mm in maximum width and characterized by having a head collar armed with 37 collar spines (dorsal spines arranged in 2 alternative rows), including 5 end group spines. The eggs in feces and worm uterus were 98-132 (117) ㎛ long and 62-90 (75) ㎛ wide. These morphological features closely resembled those of Echinostoma revolutum, E. miyagawai, and several other 37-collar-spined Echinostoma species. However, sequencing of the nuclear ITS (ITS1-5.8S rRNA-ITS2) and 2 mitochondrial genes, cox1 and nad1, revealed unique features distinct from E. revolutum and also from other 37-collar-spined Echinostoma group available in GenBank (E. bolschewense, E. caproni, E. cinetorchis, E. deserticum, E. miyagawai, E. nasincovae, E. novaezealandense, E. paraensei, E. paraulum, E. robustum, E. trivolvis, and Echinostoma sp. IG). Thus, we assigned our flukes as a new species, E. mekongi. The new species revealed marked variation in the morphology of testes (globular or lobulated), and smaller head collar, collar spines, oral and ventral suckers, and cirrus sac compared to E. revolutum and E. miyagawai. Epidemiological studies regarding the geographical distribution and its life history, including the source of human infections, remain to be performed.

• Parasites, Hosts and Diseases
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• 제57권3호
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• pp.299-302
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• 2019

A clonorchiasis case in a captive leopard cat, Prionailurus bengalensis euptilurus, was confirmed by ultrasonographic findings and egg morphologies found in the bile juice sample in the Korea. The leopard cat was introduced from the wild habitat of Gyeongsangnam-do, to Cheongju Zoo in Cheongju-si, Chungcheongbuk-do, Korea in August 2014. Physical examinations were basically performed for quarantine and check-up health. The cat was comparatively good in health except anorexia. The cyst-like bile duct dilation and the increased echogenicity of gall bladder wall and hepatic parenchyma were observed by ultrasonography. Ultrasound-guided needle biopsy was conducted for collecting bile juice and the specimens were observed under light microscope. The numerous small trematode eggs were detected in the bile juice sample of the light microscopy. The eggs were $25-33(28{\pm}3){\mu}m$ by $18-22(20{\pm}1){\mu}m$ in size and showed typical characteristics of Clonorchis sinensis egg, i.e., a dominantly developed operculum, shoulder rim and dust-like wrinkles in surface. To treat the liver fluke infection, 20 mg/kg of praziquantel was orally administered only once to the case. Follow-up studies including fecal examinations were conducted during 2 years after treatment. But no more eggs were detected from the case. In the present study, we described the first clonorchiasis case of leopard cat, which was confirmed by ultrasonographic findings and egg morphologies from the bile juice sample in Korea.

• 한국보건간호학회지
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• 제2권2호
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• pp.45-61
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• 1988

Clonorchiasis should be realized as an important public health problems in Korea by their wide distribution, high prevalence rate and heavy infection intensity. This study was designed to obtain the infection rate, contributing factors as well as the behavior of infected persons among the factory workers in Pohang area where that parasite still remains as a problem. Study was undertaken from September '86 to October '87. Clonorchiasis skin test was performed for 3180 factory workers, and stools of skin test positive reactors were examined. Praziquantel was prescribed to stool examination positive persons for clonorchis sinensis ova. After one year. stool examination was repeated for them who received medicine. At the same time. a structured questionnaire was given and the results were analyzed and compared with control group. The results of this study are summarized as follows; 1. The infection rate of Clonorchis sinensis. 1) Clonorchiassis skin test positive rate was $26.2\%$ (834/3180). 2) Stool(Clonorchis sinensis ova) positive rate among skin test positive reactors was $21.6\%$ (129/598) All 129 infected persons were male. 2. Contributing factors of Clonorchis sinensis infection. 1) The chance of infection was higher in low-educated peple(p<0.01) 2) Stool(Clonorchis sinensis ova)positive rate was higher among the persons who reside near the riverside now(p<0.01), or among the persons who long history of riverside residence(p<0.01) 3) The infection rate was higher in thoes who like sliced raw fresh water fishes than in those who like cooked fishes(p<0.05). 4) Correct answering rate for questions about the cause and route of Clonorchis sinensis infection was low in infected persons. 5) The infection rate was lower among those who had experience of previous clonorchiasis test(p<0.01). 6) Family members of infected persons show higher rates of infection(p <0.01). 3. Treatment effect and compliance of infected person to treatment. 1) After one year, negative stool conversion rate was $85.4\%$. 2) $70.8\%$ of infected persons took the medicine; Only $3.1\%$ of them consulted to physician to know the medication effect; As many as $29.4\%$ of them continued to consume raw fresh water fishes. As a conclusion, City of Pohang area, Hyung San River in the center, is an endemic area of clonorchiasis. Current clonorchiasis control system seemed to be ineffective; many of the skin test positive group did not submitted their stool for examination; only $70.8\%$ of infected persons took the medicine even though the drugs were given free of charge; $29.4\%$ continued to consume raw fresh water fishes after taking medicine. Therefore. proper education program should be provided to improve the compliance to treatment. Follow-up for infected cases is mandatory to prevent waste of restricted budget.

• Parasites, Hosts and Diseases
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• 제28권4호
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• pp.213-220
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• 1990

형산강 일대는 과거에 간흠충의 농후유행지로 알려진 지역으로, 이 강을 끼고 있는 포항 및 영일 일대 공업지역의 근로자를 대상으로 하여 최근에 간흠충 감염 여부를 검사하고 간흡충 감염과 관련된 사항에 관하여 설문조사를 시행하였다. 그 결과를 요약하면 다음과 같다. 1) 총 3,180 명을 대상으로 간흡충 항원을 이용하여 피내반응검사를 실시하였는데 26.2%인 834명이 양성이었다. 이들 양성자 중에서 598명을 검변하여 129명 (21.6%)의 간흡충란 양성자를 검출하였다. 그 이외에 편충 1.7%, 회충 0.3% 및 요꼬가와흡충 0.2%의 충란양성를을 얻었다. 2) 간흠충 감염자는 모두 20∼40대의 남자이었으며 띠감염 대조군에 띠해 유의하게 중학교 이하 지 학력자의 비율이 높았고, 형산강을 낀 포항시 및 영일군의 챙전 동(동)에 거주하는 사람의 띠율이 높았으며, 20년 이상 장기 거주자의 비율이 감염자 군에서 높았다. 약 20% 내외의 감띰자가 구충제를 점기 복음하였고, 간흡충 감염 여부에 관한 검사를 반은 적이 있고 기생충 감엄애 관한 교육을 받은 걱이 있다고 하였다. 또한 대부분의 조사 대상자가 기생충 관리에 대한 교육을 인하였다 3) 감염자 군에서 민물고기를 날로 먹는 습관을 가진 사람의 비율이 유의하게 많았으며 주로 등어, 입어 등을 소비하였다. 4) 감염자를 프라지관텐로 치료하고 1년 후에 검변한 결곽 치료자의 85.3%가 충란을 배출하지 않았다. 이상의 결과로 미루어 보면 형산강 일대에서 간흡충의 유행이 과거에 띠해 뚜렷하게 감소하였으나 아직도 많은 사람이 감염되어 있음을 확인할 수 있었다. 간흡충의 빠른 근절을 위해서는 올바른 진단과 치로 및 기생충에 관한 교육이 절실하게 요구된다.