Larval stages of medically important flukes (Trematoda) from Vientiane province, Laos.

Study on the surface morphology of the developmental stages of the liver fluke,Opisthorchis viverrini(Trematoda: Opisthorchiidae)

“…Metacercariae, encysted in the flesh o f the cyprinid fish, Hampala dispar Smith (Scholz et al, 1990), were isolated from cysts by needles or by slight pressure from a coverglass. Adult trematodes containing eggs were obtained from the liver of autopsied domestic and stray cats (Felis catus L.) .…”

Larval stages of medically important flukes (Trematoda) from Vientiane province, laos. Part II. cercariae

“…In addition to the cercariae, other developmental stages (metacercariae, adults) were found in the same locality of the Nam Ngum water reservoir (Ditrich et al, 1990). Human infection resul ting from this trematode in the Vientiane province has also been confirmed (Giboda et al 1991a).…”

“…Dinh swamp and Samgniekchinaimo swamp; 2) Vientiane munici pality -artificial fish ponds in Nong Teng; 3) Vientiane suburbs -rice fields and their irrigation systems in Khamsavath, Dong Naxok, That Luang, Sikhay, Nong Sang Thoo, Kaoliao, Don Khoi, Bung Salakham drain; 4) Vientiane municipality (Chanthaboury district) -rice fields around Nong Ping; 5) Vientiane municipa lity -rice fields and their irrigation system near Thadeua; 6) Toulakhon district -rice fields around Ban Nanin near Ban Keun; 7) Keo-Oudom district -rice fields and their irrigation systems around the villages of Ban Phonmi, Phonsavath, and N axon; 8) Keo-Oudom district -fish ponds near Ban Thinkeo; 9) Vien tiane capital -the Mekong river; 10) Vientiane municipalitythe Khu Khana river (30 km NW to Vientiane); 11) the Nam Ngum river in village of Ban Nanin and district centre Thinkeo; 12) Nam Ngum water reservoir (18 localities, in detail listed in a paper by Ditrich et al, 1990). The number of snails does not reflect the actual occurrence within an individual species in a locality because bithyniid snails, which are potentially intermediate hosts of Opisthorchis viverrini, were predominately collected.…”

“…It is very probable that cercarial development in that loca lity does not have a seasonal character (Ditrich et al, 1990). Figure 1.…”

Helminth parasites of cats from the Vientiane Province, Laos, as indicators of the occurrence of causative agents of human parasitoses

“…Spirurid nematodes found in the stomachs of domestic and Bengal cats from Laos, reported as Spirurata sp. by Giboda et al (1991b), were identified as Physaloptera praeputialis, a common parasite in the stomach of felids and reported from cats in the USA and Asia (Segal et al 1968;Rajavelu & Raja, 1988;Roberts & Janovy, 1996).…”