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Hybrid formation between African trypanosomes during cyclical transmission
Nature
|July 10, 1986
Summary
Trypanosomes reproduce asexually, but evidence suggested sexual reproduction. This study provides direct evidence of gene exchange in Trypanosoma brucei after cyclical development in tsetse flies, confirming a sexual cycle.
Area of Science:
- Parasitology
- Genetics
- Molecular Biology
Background:
- Trypanosoma brucei primarily reproduces via binary fission.
- Previous studies suggested a sexual cycle in T. brucei through enzyme variants and gene polymorphisms, indicating diploidy.
Purpose of the Study:
- To provide direct evidence for gene exchange in Trypanosoma brucei.
- To confirm the existence of a sexual cycle in this parasite.
Main Methods:
- Mixed infection of two T. brucei clones in tsetse fly vectors.
- Monitoring for gene exchange after full cyclical development.
Main Results:
- Direct evidence of gene exchange between different trypanosome clones was observed.
- Successful cyclical development in the tsetse fly vector facilitated this genetic exchange.
Conclusions:
- The study confirms a sexual cycle in Trypanosoma brucei.
- Gene exchange occurs during the cyclical development in the tsetse fly vector.