title: The problem of excremental disease in tropical Africa.
mesh_terms: D000350:Africa, Central; D000818:Animals; D003140:Communicable Disease Control; D004197:Disease Reservoirs; D004782:Environmental Health; D005243:Feces / Q000382:microbiology*; D005506:Food Contamination; D006801:Humans; D010272:Parasitic Diseases / Q000453:epidemiology*; D011528:Protozoan Infections / Q000453:epidemiology*; D012037:Refuse Disposal; D012499:Sanitation; D012987:Soil; D014038:Toilet Facilities; D014330:Tropical Medicine; D014876:Water Pollution; D015047:Zoonoses
chemical_list: D012987:Soil