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Mixed infections with Opisthorchis viverrini and intestinal flukes in residents of Vientiane Municipality and Saravane Province in Laos
- Source :
- Journal of helminthology. 79(3)
- Publication Year :
- 2005
-
Abstract
- Faecal examinations for helminth eggs were performed on 1869 people from two riverside localities, Vientiane Municipality and Saravane Province, along the Mekong River, Laos. To obtain adult flukes, 42 people positive for small trematode eggs (Opisthorchis viverrini, heterophyid, or lecithodendriid eggs) were treated with a 20–30 mg kg−1 single dose of praziquantel and purged. Diarrhoeic stools were then collected from 36 people (18 in each area) and searched for helminth parasites using stereomicroscopes. Faecal examinations revealed positive rates for small trematode eggs of 53.3% and 70.8% (average 65.2%) in Vientiane and Saravane Province, respectively. Infections with O. viverrini and six species of intestinal flukes were found, namely, Haplorchistaichui, H. pumilio, H. yokogawai, Centrocestus caninus,Prosthodendrium molenkampi, and Phaneropsolus bonnei. The total number of flukes collected and the proportion of fluke species recovered were markedly different in the two localities; in Vientiane, 1041 O. viverrini (57.8 per person) and 615 others (34.2 per person), whereas in Saravane, 395 O. viverrini (21.9 per person) and 155207 others (8622.6 per person). Five people from Saravane harboured no O. viverrini but numerous heterophyid and/or lecithodendriid flukes. The results indicate that O. viverrini and several species of heterophyid and lecithodendriid flukes are endemic in these two riverside localities, and suggest that the intensity of infection and the relative proportion of fluke species vary by locality along the Mekong River basin.
- Subjects :
- Adult
Male
Veterinary medicine
Adolescent
Rural Health
Trematode Infections
Opisthorchiasis
Praziquantel
Feces
Food Parasitology
medicine
Prevalence
Helminths
Humans
Opisthorchis viverrini
Intestinal Diseases, Parasitic
Child
Parasite Egg Count
Aged
Anthelmintics
Centrocestus formosanus
biology
General Medicine
Middle Aged
medicine.disease
biology.organism_classification
Haplorchis
Intestines
Laos
Child, Preschool
Animal Science and Zoology
Parasitology
Female
Trematoda
Haplorchis taichui
medicine.drug
Subjects
Details
- ISSN :
- 0022149X
- Volume :
- 79
- Issue :
- 3
- Database :
- OpenAIRE
- Journal :
- Journal of helminthology
- Accession number :
- edsair.doi.dedup.....593624cebbaf59ed17cdeffe6180d4eb