Free-living amoebas (FLAs) can cause severe disease in humans and animals when they become infected. However, there are no accurate survey reports on the prevalence of FLAs in Korea. In this study, we collected 163 tap water samples from buildings, apartments, and restrooms of highway service areas in 7 Korean provinces with high population density. All these buildings and facilities have water storage tanks in common. The survey was separated into categories of buildings, apartments, and highway service areas. Five hundred milliliters of tap water from each building was collected and filtered with 0.2 ?m pore filter paper. The filters were incubated in agar plates with heated E. coli at 25°C. After axenization, genomic DNA was collected from each FLA, and species classification was performed using partial 18S-rDNA PCR-sequencing analysis. We found that 12.9% of tap water from buildings with storage tanks in Korea was contaminated with FLAs. The highway service areas had the highest contamination rate at 33.3%. All of the FLAs, except one, were genetically similar to Vermamoeba vermiformis (Hartmannella vermiformis). The remaining FLA (KFA21) was very similar to Acanthamoeba lugdunensis (KA/E26). Although cases of human infection by V. vermiformis are very rare, we must pay attention to the fact that one-third of tap water supplies in highway service areas have been contaminated.
Citations
Citations to this article as recorded by
A socioenvironmental approach to the nosogenic potential of freshwaters with presence of thermotolerant free-living amoebae in Costa Rica Johan Alvarado-Ocampo, Juan José Romero Zúñiga, Julián Castro, Frida Chaves Monge, Marco Ruiz Campos, Alexa Bustamante Cortés, Elizabeth Abrahams Sandí, Lissette Retana Moreira Frontiers in Public Health.2025;[Epub] CrossRef
Presence and diversity of free-living amoebae and their potential application as water quality indicators Areum Choi, Ji Won Seong, Jeong Hyun Kim, Jun Young Lee, Hyun Jae Cho, Shin Ae Kang, Mi Kyung Park, Mi Jin Jeong, Seo Yeong Choi, Yu Jin Jeong, Hak Sun Yu Parasites, Hosts and Diseases.2024; 62(2): 180. CrossRef
A Narrative Review of Acanthamoeba Isolates in Malaysia: Challenges in Infection Management and Natural Therapeutic Advancements Mohammad Wisman Abdul Hamid, Roslaini Bin Abd Majid, Victor Fiezal Knight Victor Ernest, Nik Noorul Shakira Mohamed Shakrin, Firdaus Mohamad Hamzah, Mainul Haque Cureus.2024;[Epub] CrossRef
Proper Management for Rigid Gas Permeable Contact and Orthokeratology Lens Kyu Young Shim, Jong Hwa Jun Annals of Optometry and Contact Lens.2023; 22(1): 7. CrossRef
Well water sources simultaneous contamination with Cryptosporidium and Acanthamoeba in East-Southeast Asia and Acanthamoeba spp. in biofilms in the Philippines Frederick R. Masangkay, Giovanni D. Milanez, Joseph D. Dionisio, Luzelle Anne G.-L. Ormita, Abel V. Alvarez, Panagiotis Karanis Science of The Total Environment.2022; 837: 155752. CrossRef
Recognition of Cell Wall Mannosylated Components as a Conserved Feature for Fungal Entrance, Adaptation and Survival Within Trophozoites of Acanthamoeba castellanii and Murine Macrophages Marina da Silva Ferreira, Susana Ruiz Mendoza, Diego de Souza Gonçalves, Claudia Rodríguez-de la Noval, Leandro Honorato, Leonardo Nimrichter, Luís Felipe Costa Ramos, Fábio C. S. Nogueira, Gilberto B. Domont, José Mauro Peralta, Allan J. Guimarães Frontiers in Cellular and Infection Microbiology.2022;[Epub] CrossRef
Free-living amoebae in an oil refinery wastewater treatment facility Saeid Andalib, Hanieh Mohammad Rahimi, Maryam Niyyati, Farzaneh Shalileh, Sara Nemati, Soheila Rouhani, Mohammad Reza Zali, Hamed Mirjalali, Panagiotis Karanis Science of The Total Environment.2022; 839: 156301. CrossRef
Free-Living Amoeba Vermamoeba vermiformis Induces Allergic Airway Inflammation Da-In Lee, Sung Hee Park, Shin-Ae Kang, Do Hyun Kim, Sun Hyun Kim, So Yeon Song, Sang Eun Lee, Hak Sun Yu The Korean Journal of Parasitology.2022; 60(4): 229. CrossRef
The increasing importance of Vermamoebavermiformis Ruqaiyyah Siddiqui, Zinb Makhlouf, Naveed Ahmed Khan Journal of Eukaryotic Microbiology.2021;[Epub] CrossRef
Members of genus Acanthamoeba are widely distributed in the environment. Some are pathogenic and cause keratitis and fatal granulomatous amoebic encephalitis. In this study, we isolated an Acanthamoeba CJW/W1 strain from tap water in Wuxi, Jiangsu Province, China. Its 18S rDNA was sequenced and a phylogenetic tree was constructed. The isolated cysts belonged to morphologic group II. Comparison of 18S rDNA sequences of CJW/W1 strain and other isolates showed high similarity (99.7%) to a clinical isolate Asp, KA/E28. A phylogeny analysis confirmed this isolate belonged to the pathogenic genotype T4, the most common strain associated with Acanthamoeba-related diseases. This is the first report of an Acanthamoeba strain isolated from tap water in Wuxi, China. Acanthamoeba could be a public health threat to the contact lens wearers and, therefore, its prevalence should be monitored.
Citations
Citations to this article as recorded by
Oxford Nanopore Technology-Based Identification of an Acanthamoeba castellanii Endosymbiosis in Microbial Keratitis Sebastian Alexander Scharf, Lennart Friedrichs, Robert Bock, Maria Borrelli, Colin MacKenzie, Klaus Pfeffer, Birgit Henrich Microorganisms.2024; 12(11): 2292. CrossRef
Well water sources simultaneous contamination with Cryptosporidium and Acanthamoeba in East-Southeast Asia and Acanthamoeba spp. in biofilms in the Philippines Frederick R. Masangkay, Giovanni D. Milanez, Joseph D. Dionisio, Luzelle Anne G.-L. Ormita, Abel V. Alvarez, Panagiotis Karanis Science of The Total Environment.2022; 837: 155752. CrossRef
Molecular identification and phylogenetic analysis of free-living amoeba (Naegleria and Acanthamoeba) from treated and untreated drinking water Omid Ahmadi, Yousef Sharifi, Nazgol Khosravinia, Elham Moghaddas, Mohammad Akhoundi, Reza Fotouhi-Ardakani, Jaber Asadi, Amir Hossein Mohamadzade, Ghodratolah Salehi Sangani, Hamed Mirjalali, Mehdi Zarean Gene Reports.2021; 25: 101328. CrossRef
A survey was carried out from August to December 2004 in Pusan, Korea to document the presence of free-living amoeba (FLA), including the genus Acanthamoeba, in both contact lens storage cases and domestic tap water. Acanthamoeba was isolated from 5 (4.2%) in 120 contact lens storage cases. Four house tap water samples from residents, whose contact lens storage cases had been contaminated by Acanthamoeba, were also found to be contaminated with Acanthamoeba. Therefore, the contamination rate of FLA and Acanthamoeba in domestic tap water was investigated in order to examine the role of domestic tap water in Acanthamoeba contamination of contact lens storage cases. FLA and Acanthamoeba were identified in 97 (46.8%) and 16 (7.7%) of the 207 domestic tap water samples, respectively. There were no significant differences between the contamination rates of FLA in tap water according to the filtration plant of origin. No FLA was detected in the tap water directly supplied by the water purification plants. Water storage tanks appear to promote FLA colonization, including Acanthamoeba, in domestic tap water. This increases the risk of Acanthamoeba contamination in contact lens storage cases as well as increasing the risk of Acanthamoeba keratitis.
Citations
Citations to this article as recorded by
Calcium ions in tap water may increase the adhesion ability of Acanthamoeba, potentially enhancing its cytopathic effects on corneal cells Yu-Jen Wang, Yao-Tsung Chang, Tsun-Hsien Hsiao, Chun-Hsien Chen, Chih-Ming Tsai, Jian-Ming Huang Parasite.2025; 32: 71. CrossRef
Molecular detection and characterization of Acanthamoeba infection in dogs and its association with keratitis in Korea Subin Lee, Badriah Alkathiri, Ji Seung Jung, Nanyoung Kang, Jiyi Hwang, Sang-Eun Park, Yeonchul Hong, Kyung-Mee Park, Seung-Hun Lee Parasites, Hosts and Diseases.2024; 62(1): 139. CrossRef
Presence and diversity of free-living amoebae and their potential application as water quality indicators Areum Choi, Ji Won Seong, Jeong Hyun Kim, Jun Young Lee, Hyun Jae Cho, Shin Ae Kang, Mi Kyung Park, Mi Jin Jeong, Seo Yeong Choi, Yu Jin Jeong, Hak Sun Yu Parasites, Hosts and Diseases.2024; 62(2): 180. CrossRef
Impact of contact lens hygiene risk factors on the prevalence of contact lens-related keratitis in Alexandria-Egypt Suzan Ibrahim Sakr, Amira Ahmed Nayel, Ahmed Lotfi Khattab, Waad Mahmoud Elhamamsy, Islam Abdelmonaem Abozaid, Ramy Awad, Hager AbdelKhalek Elkazaz, Christeena Saeed Habeel, Raymond Samaha, Alaa Atef Ghaith Journal of Ophthalmic Inflammation and Infection.2024;[Epub] CrossRef
Proper Management for Rigid Gas Permeable Contact and Orthokeratology Lens Kyu Young Shim, Jong Hwa Jun Annals of Optometry and Contact Lens.2023; 22(1): 7. CrossRef
Molecular characterization and phylogenetic analysis of FLA from different water sources in Egypt Lamiaa A. Shawkey, Faten A. Elfeky, Basma M. Abou-Elnour, Eman S. El-Wakil Journal of Water and Health.2022; 20(2): 450. CrossRef
Molecular characterization of Acanthamoeba spp. from different sources in Gonabad, Razavi Khorasan, Iran Mitra Salehi, Adel Spotin, Fatemeh Hajizadeh, Faezeh Soleimani, Azar Shokri Gene Reports.2022; 27: 101573. CrossRef
The efficacy of povidone-iodine, hydrogen peroxide and a chemical multipurpose contact lens care system against Pseudomonas aeruginosa on various lens case surfaces Katsuhide Yamasaki, Yohei Mizuno, Yoshiyuki Kitamura, David J. McCanna, William Ngo, Lyndon W. Jones Contact Lens and Anterior Eye.2021; 44(1): 18. CrossRef
In vivo efficacy of silver-impregnated barrel contact lens storage cases Ananya Datta, Mark D.P. Willcox, Fiona Stapleton Contact Lens and Anterior Eye.2021; 44(4): 101357. CrossRef
A Systematic Review of Intracellular Microorganisms within Acanthamoeba to Understand Potential Impact for Infection Binod Rayamajhee, Dinesh Subedi, Hari Kumar Peguda, Mark Duncan Willcox, Fiona L. Henriquez, Nicole Carnt Pathogens.2021; 10(2): 225. CrossRef
Molecular detection of free-living amoebae from Namhangang (southern Han River) in Korea Heekyoung Kang, Hae-Jin Sohn, Ga-Eun Seo, Gi-Sang Seong, A-Jeong Ham, A-Young Park, Suk-Yul Jung, Sang-Eun Lee, Shin-Hyeong Cho, Ho-Joon Shin Scientific Reports.2020;[Epub] CrossRef
Heat and chlorine resistance of a soil
Acanthamoeba
sp. cysts in water
A.A. Gabriel, D.C. Panaligan Journal of Applied Microbiology.2020; 129(2): 453. CrossRef
Isolation of Acanthamoeba T5 from Water: Characterization of Its Pathogenic Potential, Including the Production of Extracellular Vesicles Lissette Retana Moreira, Daniel Vargas Ramírez, Fátima Linares, Alexa Prescilla Ledezma, Annette Vaglio Garro, Antonio Osuna, Jacob Lorenzo Morales, Elizabeth Abrahams Sandí Pathogens.2020; 9(2): 144. CrossRef
A review of cosmetic contact lens infections Chris H. L. Lim, Fiona Stapleton, Jodhbir S. Mehta Eye.2019; 33(1): 78. CrossRef
Influence of secondary water supply systems on microbial community structure and opportunistic pathogen gene markers Huan Li, Shang Li, Wei Tang, Yang Yang, Jianfu Zhao, Siqing Xia, Weixian Zhang, Hong Wang Water Research.2018; 136: 160. CrossRef
Prevalence of free living amoeba in the domestic waters reservoirs in Sfax, Tunisia F. Dendana, H. Trabelsi, S. Neji, H. Sellami, S. Kammoun, F. Makni, J. Feki, F. Cheikhrouhou, A. Ayadi Experimental Parasitology.2018; 193: 1. CrossRef
Acanthamoeba keratitis: confirmation of the UK outbreak and a prospective case-control study identifying contributing risk factors Nicole Carnt, Jeremy J Hoffman, Seema Verma, Scott Hau, Cherry F Radford, Darwin C Minassian, John K G Dart British Journal of Ophthalmology.2018; 102(12): 1621. CrossRef
Molecular characterization and phylogenetic analysis of Acanthamoeba isolates in tap water of Beni-Suef, Egypt Wegdan M. Abd El Wahab, Ayman A. El-Badry, Doaa A. Hamdy Acta Parasitologica.2018; 63(4): 826. CrossRef
Genotypic, physiological, and biochemical characterization of potentially pathogenic Acanthamoeba isolated from the environment in Cairo, Egypt Gihan Mostafa Tawfeek, Sawsan Abdel-Hamid Bishara, Rania Mohammad Sarhan, Eman ElShabrawi Taher, Amira ElSaady Khayyal Parasitology Research.2016; 115(5): 1871. CrossRef
Comparative proteomic analysis of extracellular secreted proteins expressed by two pathogenic Acanthamoeba castellanii clinical isolates and a non-pathogenic ATCC strain Jian-Ming Huang, Wei-Chen Lin, Sung-Chou Li, Min-Hsiu Shih, Wen-Ching Chan, Jyh-Wei Shin, Fu-Chin Huang Experimental Parasitology.2016; 166: 60. CrossRef
Acanthamoeba Keratitis among Rigid Gas Permeable Contact Lens Wearers in the United States, 2005 through 2011 Jennifer R. Cope, Sarah A. Collier, Oliver D. Schein, Allison C. Brown, Jennifer R. Verani, Rachel Gallen, Michael J. Beach, Jonathan S. Yoder Ophthalmology.2016; 123(7): 1435. CrossRef
Soil Contamination With Free-Living Amoeba in North of Iran Mohammad Ali Mohaghegh, Mojtaba Azimi Resketi, Reza Mohammadimanesh, Mehdi Azami, Farzaneh Mirzaie, Mohammad Falahati, Somayeh Jahani, Mohsen Ghomashlooyan International Journal of Infection.2016;[Epub] CrossRef
Isolation and Genotyping of Acanthamoeba spp. as Neglected Parasites in North of Iran Azar Shokri, Shahabeddin Sarvi, Ahmad Daryani, Mehdi Sharif The Korean Journal of Parasitology.2016; 54(4): 447. CrossRef
Molecular and Morphometric Characterization of Acanthamoeba spp. from Different Water Sources of Northwest Iran as a Neglected Focus, Co-Bordered With the Country of Iraq Aram Khezri, Esmaeel Fallah, Mostafa Mostafazadeh, Adel Spotin, Abbas Shahbazi, Mahmoud Mahami-Oskouei, Taimuor Hazratian Jundishapur Journal of Microbiology.2016;[Epub] CrossRef
Acanthamoeba spp. in Contact Lenses from Healthy Individuals from Madrid, Spain Thiago dos Santos Gomes, Angela Magnet, Fernando Izquierdo, Lucianna Vaccaro, Fernando Redondo, Sara Bueno, Maria Luisa Sánchez, Santiago Angulo, Soledad Fenoy, Carolina Hurtado, Carmen del Aguila, Graham R. Wallace PLOS ONE.2016; 11(4): e0154246. CrossRef
Contact lens hygiene compliance and lens case contamination: A review Yvonne Tzu-Ying Wu, Mark Willcox, Hua Zhu, Fiona Stapleton Contact Lens and Anterior Eye.2015; 38(5): 307. CrossRef
The role of domestic tap water on Acanthamoeba keratitis in non-contact lens wearers and validation of laboratory methods Ismail Soner Koltas, Fadime Eroglu, Elif Erdem, Meltem Yagmur, Ferdi Tanır Parasitology Research.2015; 114(9): 3283. CrossRef
The Impact of Written Information on the Compliance with Contact Lens Care Hee Weon Kim, Sang Yoon Lee, Sang Mok Lee Journal of the Korean Ophthalmological Society.2015; 56(12): 1848. CrossRef
Identification of coagulase-negative staphylococci in daily disposable contact lens wearers B. Hall, D. McCanna, L. Jones Letters in Applied Microbiology.2014; 59(3): 313. CrossRef
Acanthamoeba Protease Activity Promotes Allergic Airway Inflammation via Protease-Activated Receptor 2 Mi Kyung Park, Min Kyoung Cho, Shin Ae Kang, Hye-Kyung Park, Dong-Hee Kim, Hak Sun Yu, Venuprasad K. Poojary PLoS ONE.2014; 9(3): e92726. CrossRef
Non—Contact Lens Use—Related Acanthamoeba Keratitis in Southern Turkey: Evaluation of Risk Factors and Clinical Features Elif Erdem, Yusuf Evcil, Meltem Yagmur, Fadime Eroglu, Soner Koltas, Reha Ersoz European Journal of Ophthalmology.2014; 24(2): 164. CrossRef
A year long study of the presence of free living amoeba in Spain A. Magnet, S. Fenoy, A.L. Galván, F. Izquierdo, C. Rueda, C. Fernandez Vadillo, C. del Aguila Water Research.2013; 47(19): 6966. CrossRef
Molecular characterization of Acanthamoeba isolated in water treatment plants and comparison with clinical isolates A. Magnet, A. L. Galván, S. Fenoy, F. Izquierdo, C. Rueda, C. Fernandez Vadillo, J. Pérez-Irezábal, K. Bandyopadhyay, G. S. Visvesvara, A. J. da Silva, C. del Aguila Parasitology Research.2012; 111(1): 383. CrossRef
Evaluation of microbial contamination and distribution of sulphate-reducing bacteria in dental units Nihal Dogruöz, Esra Ilhan-Sungur, Duygu Göksay, Irfan Türetgen Environmental Monitoring and Assessment.2012; 184(1): 133. CrossRef
Microbial contamination of contact lens storage cases and domestic tap water of contact lens wearers Miray Üstüntürk, Zuhal Zeybek Wiener klinische Wochenschrift.2012; 124(S3): 17. CrossRef
Amoebicidal Effects of Contact Lens Disinfecting Solutions Maureen V. Boost, Guang-Sen Shi, Sindy Lai, Pauline Cho Optometry and Vision Science.2012; 89(1): 44. CrossRef
Adherence of Acanthamoeba to Lens Cases and Effects of Drying on Survival Maureen Boost, Guang-Sen Shi, Pauline Cho Optometry and Vision Science.2011; 88(6): 703. CrossRef
Impact of Lens Case Hygiene Guidelines on Contact Lens Case Contamination Yvonne T. Wu, Yuu Juan Teng, Mary Nicholas, Najat Harmis, Hua Zhu, Mark D. P. Willcox, Fiona Stapleton Optometry and Vision Science.2011; 88(10): E1180. CrossRef
Do Free-Living Amoebae in Treated Drinking Water Systems Present an Emerging Health Risk? Jacqueline M. Thomas, Nicholas J. Ashbolt Environmental Science & Technology.2011; 45(3): 860. CrossRef
Clinical management of infectious contact lens complications: from antibiotics to quorum-sensing inhibitors Alexander A Bialasiewicz, Katharina A Breidenbach, Volker Klauss, Rashid M Al-Saeidi, Radha Shenoy, Gudrun Bischoff Expert Review of Ophthalmology.2010; 5(6): 789. CrossRef
Contact Lens Cases: The Missing Link in Contact Lens Safety? Brad J. Hall, Lyndon Jones Eye & Contact Lens: Science & Clinical Practice.2010; 36(2): 101. CrossRef
Acanthamoeba spp. in domestic tap water in houses of contact lens wearers in the metropolitan area of Mexico City Patricia Bonilla-Lemus, Gerardo A. Ramírez-Bautista, Claudia Zamora-Muñoz, María del Rocío Ibarra-Montes, Elizabeth Ramírez-Flores, María Dolores Hernández-Martínez Experimental Parasitology.2010; 126(1): 54. CrossRef
Free-living amoebae and their intracellular pathogenic microorganisms: risks for water quality Vincent Thomas, Gerald McDonnell, Stephen P. Denyer, Jean-Yves Maillard FEMS Microbiology Reviews.2010; 34(3): 231. CrossRef
Endosymbionts of Acanthamoeba Isolated from Domestic Tap Water in Korea Seon Hee Choi, Min Kyoung Cho, Soon Cheol Ahn, Ji Eun Lee, Jong Soo Lee, Dong-Hee Kim, Ying-Hua Xuan, Yeon Chul Hong, Hyun Hee Kong, Dong Il Chung, Hak Sun Yu The Korean Journal of Parasitology.2009; 47(4): 337. CrossRef
National Outbreak ofAcanthamoebaKeratitis Associated with Use of a Contact Lens Solution, United States Jennifer R. Verani, Suchita A. Lorick, Jonathan S. Yoder, Michael J. Beach, Christopher R. Braden, Jacquelin M. Roberts, Craig S. Conover, Sue Chen, Kateesha A. McConnell, Douglas C. Chang, Benjamin J. Park, Dan B. Jones, Govinda S. Visvesvara, Sharon L. Emerging Infectious Diseases.2009; 15(8): 1236. CrossRef
18S ribosomal DNA genotypes of Acanthamoeba species isolated from contact lens cases in the Philippines Windell L. Rivera, Davin Edric V. Adao Parasitology Research.2009; 105(4): 1119. CrossRef
The Relative Value of Confocal Microscopy and Superficial Corneal Scrapings in the Diagnosis of Acanthamoeba Keratitis Elmer Y Tu, Charlotte E Joslin, Joel Sugar, Gregory C Booton, Megan E Shoff, Paul A Fuerst Cornea.2008; 27(7): 764. CrossRef
Impaired innate immunity of ocular surface is the key bridge between extended contact lens wearing and occurrence of Acanthamoeba keratitis Li Li, Xuguang Sun Medical Hypotheses.2008; 70(2): 260. CrossRef
Detection of Acanthamoeba in Tap Water and Contact Lens Cases Using Polymerase Chain Reaction Maureen Boost, Pauline Cho, Sindy Lai, Wing-Man Sun Optometry and Vision Science.2008; 85(7): 526. CrossRef
Acanthamoeba keratitis related to orthokeratology Ji-Eun Lee, Tae Won Hahn, Boo Sup Oum, Hee Young Choi, Hak Sun Yu, Jong Soo Lee International Ophthalmology.2007; 27(1): 45. CrossRef
Acanthamoeba Keratitis Eva-Marie Chong, M. Reza Dana International Ophthalmology Clinics.2007; 47(2): 33. CrossRef
Variable Responses of Acanthamoeba Strains to Three Multipurpose Lens Cleaning Solutions MEGAN SHOFF, ANDREW ROGERSON, SCOTT SCHATZ, DAVID SEAL Optometry and Vision Science.2007; 84(3): 202. CrossRef
Effects of short-time drying on biofilm-associated bacteria Irfan Türetgen, Esra Ilhan-Sungur, Aysin Cotuk Annals of Microbiology.2007; 57(2): 277. CrossRef
Contact Lens Solution Efficacy Against Acanthamoeba castellani Mary Mowrey-McKee, Melanie George Eye & Contact Lens: Science & Clinical Practice.2007; 33(5): 211. CrossRef
Acanthamoeba keratitis related to cosmetic contact lenses Jong Soo Lee, Tae Won Hahn, Si Hwan Choi, Hak Sun Yu, Ji‐Eun Lee Clinical & Experimental Ophthalmology.2007; 35(8): 775. CrossRef
Acanthamoeba: Keratopathogenicity of isolates from domestic tap water in Korea Hae Jin Jeong, Sun Joo Lee, Jeong Hwan Kim, Ying Hua Xuan, Keun Hee Lee, Sang Kyun Park, Sun Hee Choi, Dong Il Chung, Hyun Hee Kong, Mee Sun Ock, Hak Sun Yu Experimental Parasitology.2007; 117(4): 357. CrossRef
Molecular characterization of Acanthamoeba isolated from amebic keratitis related to orthokeratology lens overnight wear Sun Joo Lee, Hae Jin Jeong, Ji Eun Lee, Jong Soo Lee, Ying Hua Xuan, Hyun-Hee Kong, Dong-Il Chung, Mee-Sun Ock, Hak Sun Yu The Korean Journal of Parasitology.2006; 44(4): 313. CrossRef