title: Sewage pollution of natural waters.
mesh_terms: D002771:Cholera / Q000209:etiology; D004403:Dysentery / Q000209:etiology; D004926:Escherichia coli / Q000302:isolation & purification; D005243:Feces / Q000382:microbiology; D006801:Humans; D012475:Salmonella / Q000302:isolation & purification; D012480:Salmonella Infections / Q000453:epidemiology; D012621:Seasons; D012722:Sewage; D014435:Typhoid Fever / Q000209:etiology; D006113:United Kingdom; D014871:Water Microbiology; D014876:Water Pollution
chemical_list: D012722:Sewage