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<i>Echinostoma revolutum</i> Infection in Children, Pursat Province, Cambodia
Sohn, Woon-Mok,Chai, Jong-Yil,Yong, Tai-Soon,Eom, Keeseon S.,Yoon, Cheong-Ha,Sinuon, Muth,Socheat, Duong,Lee, Soon-Hyung Centers for Disease Control and Prevention 2011 Emerging infectious diseases Vol.17 No.1
<P>To determine the prevalence of helminthic infections in Pursat Province, Cambodia, we tested fecal specimens from 471 children, 10–14 years of age, in June 2007. The prevalence of infection with echinostome flukes ranged from 7.5% to 22.4% in 4 schools surveyed. Adult worms were identified as <I>Echinostoma revolutum.</I></P>
Prevalence of Opisthorchis viverrini infection in humans and fish in Kratie Province, Cambodia
Sohn, W.M.,Yong, T.S.,Eom, K.S.,Pyo, K.H.,Lee, M.Y.,Lim, H.,Choe, S.,Jeong, H.G.,Sinuon, M.,Socheat, D.,Chai, J.Y. Verlag für Recht und Gesellschaft ; Elsevier 2012 Acta tropica Vol.124 No.3
Opisthorchis viverrini is a medically important foodborne parasite in the Indochina Peninsula. In Cambodia, the prevalence of this trematode has been reported in Takeo Province, but not in other areas. In this study, we investigated the prevalence of O. viverrini infection among people in seven riparian villages along the Mekong River, Kratie Province. We also examined the status of metacercarial infection in fish hosts. Fecal specimens were collected from 2101 residents and schoolchildren, and were examined by the Kato-Katz technique. The average O. viverrini egg positive rate was 4.6%, with the highest prevalence found in Roka Kandal A village (10.4%) followed by Talous village (5.9%). In these villages, adult residents showed higher prevalences (19.4% and 9.0%, respectively) than schoolchildren (6.4% and 1.4%, respectively). O. viverrini adult worms were recovered from 2 egg-positive cases (18 and 4 specimens) after praziquantel treatment and purgation. In addition, three of seven freshwater fish species caught near the villages were positive for O. viverrini metacercariae. A total of 367 metacercariae were harvested from 19 infected fish (metacercarial density; 19 per fish). The species of the metacercariae was confirmed through adult worm recovery by experimental infection to hamsters. The results provide evidence that the surveyed areas of Kratie Province, Cambodia, are endemic for O. viverrini infection.
Echinostoma ilocanum Infection in Oddar Meanchey Province, Cambodia
Woon-Mok Sohn,Hyeong-Jin Kim,Tai-Soon Yong,Keeseon S. Eom,Hoo-Gn Jeong,Jae-Kwang Kim,A-Reum Kang,Mok-Ryun Kim,Jung-Mi Park,Soo-Hyeon Ji,Muth Sinuon,Duong Socheat,Jong-Yil Chai 대한기생충학열대의학회 2011 The Korean Journal of Parasitology Vol.49 No.2
Fecal examinations using the Kato Katz technique were performed on a total of 1,287 villagers (945 students and 342 general inhabitants) of Oddar Meanchey Province, Cambodia in May 2007 and November 2009. The overall intestinal helminth egg positive rate was 23.9%, and the most prevalent helminth species was hookworms (21.6%). Other helminth eggs detected included echinostomes (1.0%), Enterobius vermicularis (0.8%), small trematode eggs (0.7%), which may include Opisthorchis viverrini and Haplorchis spp., and Hymenolepis nana (0.4%). In order to recover adult echinostomes, we treated 2 patients with 10-15 mg/kg praziquantel and purged. Total 14 adult echinostomes, 1 and 13 worms from each patient, were collected. The echinostomes characteristically had 49-51 collar spines and 2 round or slightly lobated testes. They were identified as Echinostoma ilocanum (Garrison, 1908) Odhner, 1911. So far as literature are concerned, this is the first record on the discovery of human E. ilocanum infection in Cambodia.