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Kinetoplastids: related protozoan pathogens, different diseases
Ken Stuart, Reto Brun, Simon Croft, Alan Fairlamb, Ricardo E. Gürtler, Jim McKerrow, Steve Reed, Rick Tarleton
Ken Stuart, Reto Brun, Simon Croft, Alan Fairlamb, Ricardo E. Gürtler, Jim McKerrow, Steve Reed, Rick Tarleton
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Review Series

Kinetoplastids: related protozoan pathogens, different diseases

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Abstract

Kinetoplastids are a group of flagellated protozoans that include the species Trypanosoma and Leishmania, which are human pathogens with devastating health and economic effects. The sequencing of the genomes of some of these species has highlighted their genetic relatedness and underlined differences in the diseases that they cause. As we discuss in this Review, steady progress using a combination of molecular, genetic, immunologic, and clinical approaches has substantially increased understanding of these pathogens and important aspects of the diseases that they cause. Consequently, the paths for developing additional measures to control these “neglected diseases” are becoming increasingly clear, and we believe that the opportunities for developing the drugs, diagnostics, vaccines, and other tools necessary to expand the armamentarium to combat these diseases have never been better.

Authors

Ken Stuart, Reto Brun, Simon Croft, Alan Fairlamb, Ricardo E. Gürtler, Jim McKerrow, Steve Reed, Rick Tarleton

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Figure 2

Life cycle of T. cruzi.

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Life cycle of T. cruzi.

Persistent infection with T. cruzi causes Chaga...
Persistent infection with T. cruzi causes Chagas disease. The parasite is transmitted to humans by infected blood-sucking Triatominae insects, which deposit trypomastigotes in their feces during feeding. The trypomastigotes enter the wound and invade nearby cells, within which they differentiate into intracellular amastigotes that multiply by binary fission. The amastigotes differentiate into trypomastigotes, which are released into the bloodstream and infect cells of multiple organs and tissues, including the heart, gut, CNS, smooth muscle, and adipose tissue and once again become amastigotes. The Triatominae insects become infected when they take a parasite-containing blood meal from an infected human or animal. The trypomastigotes undergo morphological and physiological transformations in the midgut of the vector and differentiate into infective trypomastigotes in the hindgut. Image modified with permission from Alexander J. da Silva and Melanie Moser, Centers for Disease Control Public Health Image Library.

Copyright © 2026 American Society for Clinical Investigation
ISSN: 0021-9738 (print), 1558-8238 (online)

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