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The Life and Work of Brayton H. Ransom

U. S. Department of Agriculture

Abstract

In the death of Brayton H. Ransom, Sept. 17, 1925, the livestock industry of this country lost one of its best parasitologists, a man whose contributions to this industry have been most valuable. It was well stated in Science by the writer of his obituary that Dr. Ransom ranked in the field of veterinary parasitology with the leading parasitologists of the world, standing in this field with the illustrious Raillet of Alfort.

Stomach Worms, Haemonchus contortus in Sheep

Before it was possible to inaugurate control measures for stomach worms it was necessary to learn the life cycle. This was worked out by Dr. Ransom. He found that the infestive larvae of Haemonchus contortus crawled up on the blades of grass, and showed that in grazing the sheep would become infected with these larvae. He proved that the infective larvae could withstand such adverse conditions as drying and ordinarily unfavorable temperatures.