• Parasites, Hosts and Diseases
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• v.47 no.3
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• pp.315-318
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• 2009

Quantitative fecal egg counts represented as the number of eggs per gram of feces (EPG) are generally a reliable parameter to estimate the worm burden of intestinal and hepatic parasitoses. Although Haplorchis taichui (Digenea: Heterophyidae) is one of the most common minute human intestinal flukes, little is known about the relationship between EPG and the actual worm burden in patients or the severity of the disease. In the present study, fecal samples were collected from 25 villagers in northern Thailand before and after praziquantel treatment. The EPG values of each participant were determined by the modified cellophane thick smear method, and adult worms were collected from the whole stool after the treatment. Eggs per day per worm (EPDPW) of H. taichui were estimated 82 from egg counts and expelled worms. The EPG was not well correlated with the worm burden, and a reverse correlation was observed between the EPDPW and the worm burden.

• Parasites, Hosts and Diseases
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• v.26 no.2
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• pp.117-120
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• 1988

The egg laying capacity of Fibritola seoulensis was observed in mice and rats. In mice, the mean number of eggs produced by an adult worm a day was 116 at the 1st week after infection, 123 at the 2nd week and 42 at the 3rd week. Thereafter, the capacity of about 20 eggs/worm/day was maintained up to one year period. In rats, it generally produced more eggs; 49 at 1 week, 250 at 2 weeks, 216 at 4 weeks, 327 at 6 months and 11 at one year after infection. It survived longer than a year in mice and rats.

• Parasites, Hosts and Diseases
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• v.26 no.3
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• pp.199-206
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• 1988

An epidemiological study was performed to know the infection status of 5. hortense among the human residents and fish intermediate hosts in Chongsong·gun, Kyongsangbuk·do. Out of 263 people examined, 59(22.4%) were positive for the eggs of E. hortense. Total 152 fresh water fishes (9 species) were ellamined, and Odentobutis obscura interrupts, Misgurnus an- guiIZicaudatus and Squalidus coreanus were found to harbour the metacercariae of E. hortense. Juvenile or adult E. hertense were expelled from 35 out of 54 cases treated with pragiquantel. The number of worms Per individual ranged from 1 to 649, with the average burden of 51. The eosinophil count of infected persons ranged 1∼24% (6% in average). The number of eggs per day Per worm (EPDPW) in human host was estimated about 1,478. The results showed that Chongsong-gun is an endemic area of E. hortense.