Résumé
The prevalence of intestinal parasitic infection among 128 children under 15 years old in two villages in Khammouane Province, southeastern Lao PDR, was investigated. Overall prevalence of helminth infection was 77.3%; the prevalence was 64.8% in children under 6 years, 88.5% in those aged 6-10 years and 81.8% in the age group above 11 years. The prevalent helminths found in the subjects were Ascaris lumbricoides (48.4%), Trichuris trichiura (43.8%), hookworm (37.5%) and Opisthorchis viverrini (37.5%). Intestinal protozoan infection was demonstrated in 14.1%; Giardia lamblia was the most prevalent (8.6%) protozoan species.
Sujets)
Adolescent , Amibiase/épidémiologie , Enfant , Enfant d'âge préscolaire , Femelle , Helminthiase/épidémiologie , Humains , Nourrisson , Nouveau-né , Maladies intestinales/épidémiologie , Laos/épidémiologie , Mâle , PrévalenceRésumé
In 1987 and 1990, serum samples were collected from people living in the two districts (Itahari and Chitwan) of the Terai region of Nepal. Antibodies against Japanese encephalitis (JE) virus in these sera were detected by the hemagglutination inhibition (HI) and neutralization (N) tests. By the HI test, 26 out of 172 (15.1%) sera from Chitwan and 15 out of 137 (10.9%) sera from Itahari showed positive titers. Higher positive rates were shown by the N test, where 46 out of 172 (26.7%) sera from Chitwan and 22 out of 137 (16.1%) sera from Itahari had antibodies against JE virus. A JE strain was isolated from a blood specimen of a pig raised in Kathmandu. When the nucleotide sequence of the pre-M region of the strain was compared to the same region of the other JE virus strains reported, the highest similarity was observed to the strains isolated in Nepal in 1985. These results suggest that the Terai region has been an epidemic area of JE.