title: Bilharzia in industry--effect on productivity in a Kitwe foundry.
mesh_terms: D000041:Absenteeism; D000293:Adolescent; D000328:Adult; D000367:Age Factors; D004526:Efficiency; D006801:Humans; D008297:Male; D008875:Middle Aged; D009786:Occupational Health Services; D009787:Occupational Medicine; D012552:Schistosomiasis / Q000453:epidemiology*; D015024:Zambia