A Critical Review of the Relation of Blood-sucking Invertebrates to the Life Cycles of the Trypanosomes of Vertebrates, with a Note on the Occurrence of a Species of Crithidia, C. ctenopthalmi, in the Alimentary Tract of Ctenopthalmus agyrtes, Heller

Abstract

It is now an established fact that a number of blood-sucking arthropods and leeches are infected with flagellate organisms belonging to the genera Herpetomonas and Crithidia, and we believe that in more than one instance, these natural flagellates have been described as developmental forms of various trypanosomes which might be ingested by these sanguivora. As the whole question of the transmission of trypanosomes is intimately connected with these so-called developmental forms in invertebrate hosts, we propose reviewing in detail this important subject before recording our observations on the flagellate of Ctenopthalmus agyrtes.