To the history of the development of spirochetes. Leishmann (Centr. f. Bakter., Ref., Bd. 72, 1921)
On the basis of observations on patients with African relapsing typhus the author expresses the following view on the history of development of spir. Duttoni in the body of the tick and in the organism of a sick person: spirochaetes entering the tick body together with the blood of a sick person lose their mobility and turn into granules, which are small lumps surrounded by a homogeneous mass; at some time they can be found in eggs in the ovary and in young larvae (nymphs).