They seize hold of the first that brushes by, and crawling to a suitable place become engorged with blood.
A bubo is found to consist of a chain of enlarged glands, surrounded by a mass of engorged connective tissue, coagulated blood and serum.
A surgical operation is sometimes undertaken with success for enabling the engorged veins to empty themselves into the blood-stream in a manner so as to avoid the liver-route.
The lungs are engorged and oedematous, and often show haemorrhages.
The surrounding tissue is not engorged or oedematous.