title: Isolates typed by the Salmonella reference laboratory and the Escherichia coli serotyping laboratory during 1977.
mesh_terms: D000821:Animal Feed; D000818:Animals; D002417:Cattle / Q000382:microbiology; D002645:Chickens / Q000382:microbiology; D004926:Escherichia coli / Q000145:classification* / Q000302:isolation & purification; D012475:Salmonella / Q000145:classification* / Q000302:isolation & purification; D012703:Serotyping; D012722:Sewage; D012756:Sheep / Q000382:microbiology; D013552:Swine / Q000382:microbiology
chemical_list: D012722:Sewage