...The growingof a crop on the heavier types of soil used for ducksis especially important as such soils are more likelyto become contaminated from the droppings... 
Harry M. Lamon 「Ducks and Geese」
...Manyinvestigators have demonstrated that the infection is transmitted through thedigestive tract, through contaminated feed and water...
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
...The fetus, afterbirth, provided it has beenexpelled, and all litter that has been contaminated with them and uterinedischarges should be gathered up and destroyed either by burning or burying...
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
...On subsequent occasions the infection has evidently been broughtin with contaminated products or materials and not by means of live animals...
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
...By this method the land willcarry a large crop of chickens year after year for many years, yet itfinally becomes so contaminated that chickens do not thrive on it...
John H. Robinson 「Our Domestic Birds」
...It is peculiarly sensitive to the effectsof soil which has been contaminated by the excrement of animals, and soinstinctively avoids feeding places on which other animals are numerous...
John H. Robinson 「Our Domestic Birds」
...dirt has been carefully buried, the entire surface which has beencontaminated, or is likely to have been contaminated, should be coveredwith a layer of chloride of lime in powder...
Honoré Bourguignon 「On the cattle plague: or, Contagious typhus in horned cattle. Its history, origin, description, and treatment」
...This also reminds us of the so-called carbuncle flies, the lancet of whose mouth parts, contaminated with the sanies of corpses, produces such terrible accidents...
J. Henri Fabre Alexander Teixeira de Mattos 「The Life of the Fly」
...The husband is excluded from thehut for eight days of the lying-in period, chiefly from fear thathe might be contaminated by this secretion...
Sir James George Frazer 「The Golden Bough」
...In all parts of the world, if it became known that a man hadcome from Tasmania, he was looked upon with the utmost distrust andsuspicion, and was shunned as contaminated...
Alexander Sutherland 「History of Australia and New Zealand」
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