Ducks and shellfish sanitation.
D000818:Animals; D003445:Crustacea; D004372:Ducks; D005502:Food; D006801:Humans; D008974:Mollusca; D010284:Paratyphoid Fever; D011200:Poultry; D012499:Sanitation; D012758:Shellfish; D014867:Water
D014867:Water
CRUSTACEA; FOOD; FOWLS; PARATYPHOID; WATER