The external treatment must vary with the character of the lesions; no irritating application is to be made while the disease is in its acute vesicular, or Pustular, stage, and, in the chronic stage, active stimulants must be used.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler
Its severity manifested itself even in the milder cases, while confluent cases, almost without exception, developed hemorrhages during the Pustular state....
"Health Work in the Public Schools"
Leonard P. Ayres and May Ayres
As she increases in size her skin distends and she becomes smooth and dry; the rings of the body become effaced; and losing entirely the form of an insect, she presents, for some time, a yellowish Pustular shape, but ultimately assumes a roundish conical form, of a dark brown colour.
"Sketches of the Natural History of Ceylon"
J. Emerson Tennent