title: Soil-transmitted helminth infections and risk factors in preschool children in southern rural Lao People's Democratic Republic.
abstract: The current widespread school-based control of soil-transmitted helminth (STH) infections is also advocated for preschool children. The objective of this study was to assess infection with STHs as well as their determinants in preschool children (<60 months) in southern rural Lao People's Democratic Republic (Lao PDR). A cluster survey was carried out from October to December 2006 in three districts of Savannakhet Province. The prevalence of Ascaris lumbricoides, hookworm and Trichuris trichiura was 27.4% (95% CI 27.0-27.6%), 10.9% (95% CI 10.7-11.0%) and 10.9% (95% CI 10.7-11.1%), respectively. Of the children studied, 28.4% had a monoparasitic infection and 9.3% had a polyparasitic infection. Older children had a higher risk for hookworm infection [odds ratio (OR) = 1.75, 95% CI 1.03-3.01; P = 0.041] and multiple infections (OR = 1.81, 95% CI 1.01-3.20; P = 0.044). Low socioeconomic status was associated with A. lumbricoides (OR = 0.61, 95% CI 0.38-0.98; P = 0.043) and monoparasitic infections (OR = 0.62, 95% CI 0.38-0.99; P = 0.049). In Lao PDR, deworming of preschool children is warranted. Preventive measures should address important risk factors. Health education regarding personal hygiene, appropriate water management and the construction and proper use of latrines are additional essential elements.
authors.affiliation: National Institute of Public Health, Ministry of Health, Vientiane, Lao People's Democratic Republic. sengchanhkounnavong@hotmail.com
authors.forename: Sengchanh
authors.initials: S
authors.lastname: Kounnavong
authors.forename: Manithong
authors.initials: M
authors.lastname: Vonglokham
authors.forename: Keonakhone
authors.initials: K
authors.lastname: Houamboun
authors.forename: Peter
authors.initials: P
authors.lastname: Odermatt
authors.forename: Boungnong
authors.initials: B
authors.lastname: Boupha
mesh_terms: D000818:Animals; D001196:Ascariasis / Q000453:epidemiology* / Q000635:transmission; D017164:Ascaris lumbricoides / Q000302:isolation & purification*; D002675:Child, Preschool; D005243:Feces / Q000469:parasitology*; D005260:Female; D006373:Helminthiasis / Q000453:epidemiology* / Q000635:transmission; D006725:Hookworm Infections / Q000453:epidemiology* / Q000635:transmission; D006801:Humans; D006920:Hygiene / Q000193:education / Q000592:standards; D007223:Infant; D007812:Laos / Q000453:epidemiology; D008297:Male; D015995:Prevalence; D012307:Risk Factors; D012499:Sanitation / Q000592:standards; D012574:Schools; D012959:Socioeconomic Factors; D012987:Soil / Q000469:parasitology; D014258:Trichuris / Q000302:isolation & purification*
chemical_list: D012987:Soil