(6) The organization of a corps of workers to carry on the operations.
(7) The systematic dipping of the horses, cattle, sheep, and dogs of the valley on a definite weekly schedule from approximately March 10 to June 9.
(8) The treatment by hand of the animals in localities remote from vats, on the same schedule.
They estimate that after three seasons' operations a very small annual expenditure would provide against reinfestation of the valley by the incoming of cattle from other places.
Supplementary measures consist in the killing of wild mammals which may harbor the tick; systematic burning of the brush and debris on the mountain side; and in clearing, since the tick is seldom found on land under cultivation.
CHAPTER X
ARTHROPODS AS ESSENTIAL HOSTS OF PATHOGENIC PROTOZOA [Continued]
Arthropods and Spirochætoses of Man and Animals
The term spirochætoses is applied to diseases of man or animals which are due to protistan parasites belonging to the group of slender, spiral organisms known as spirochætes.