High Prevalence of Opisthorchis viverrini Infection in a Riparian Population in Takeo Province, Cambodia

Abstract

Opisthorchis viverrini infection was found to be highly prevalent in 3 riverside villages (Ang Svay Chek A, B, and C) of the Prey Kabas District, Takeo Province. This area is located in the southern part of Cambodia, where the recovery of adult O. viverrini worms was recently reported. From May 2006 until May 2010, fecal examinations were performed on a total of 1,799 villagers using the Kato-Katz thick smear technique. In the 3 villages, the overall positive rate for helminth eggs ranged from 51.7 to 59.0% (av. 57.4%), and the percentage positive for O. viverrini was 46.4-50.6% (47.5%). Other helminths detected included hookworms (13.2%), echinostomes (2.9%), Trichuris trichiura (1.3%), Ascaris lumbricoides (0.6%), and Taenia spp. (0.06%). The prevalence of O. viverrini eggs appeared to reflect a lower infection in younger individuals (<20 years) than in the adult population (>20 years). Men (50.4%) revealed a significantly higher (P=0.02) prevalence than women (44.3%). The Ang Svay Chek villages of the Prey Kabas District, Takeo Province, Cambodia have been confirmed to be a highly endemic area for human O. viverrini infection.

Zoonotic Trematode Metacercariae in Fish from Phnom Penh and Pursat, Cambodia

“…This was reconfirmed by fecal examinations during the Korea-Cambodia International Collaboration Project on Intestinal Parasite Control in Cambodia (2006-2011) [14,15]. With regard to FBT infections, several investigators have previously reported that O. viverrini are prevalent in some limited areas of Cambodia [14-17].…”

“…This was reconfirmed by fecal examinations during the Korea-Cambodia International Collaboration Project on Intestinal Parasite Control in Cambodia (2006-2011) [14,15]. With regard to FBT infections, several investigators have previously reported that O. viverrini are prevalent in some limited areas of Cambodia [14-17]. Recently, Touch et al [17] reported infection of freshwater fish with O. viverrini metacercariae in areas adjacent to the Lake 500 near the border of Kandal and Takeo Provinces, southern Cambodia [17].…”

Molecular confirmation of trematodes in the snail intermediate hosts from Ratchaburi Province, Thailand

“…Freshwater snails and fish typically serve as the intermediate host in most instances [1,6,14,15]. These trematodes are endemic throughout the Southeast Asian region, including Thailand, Lao PDR, Vietnam, Korea and the Philippines [1,2,5,7,10,15], with a high incidence of mixed infections involving small liver trematodes and other minute intestinal trematodes [16,17]. The distribution of trematodes requires specific suitable ecological conditions, typically involving certain water resources such as those located in agricultural areas as well as rivers and irrigation canals.…”

A 13-Year Retrospective Study on Primary Liver Cancer in Cambodia: A Strikingly High Hepatitis C Occurrence among Hepatocellular Carcinoma Cases

“…Concerning the liver fluke, a high parasitic prevalence has been recorded in some provinces, especially in Kampong Cham, Kampong Thom, Kandal, Kratie, and Takeo provinces. In these regions, infestation rates among the general population range from 1.3 to 65.1% [19,20,21,22]. …”