Two Distinct Taxa of Triatoma dimidiata Found in Guatemala and Mexico
Author Information
Author(s): Dorn Patricia L., Calderon Claudia, Melgar Sergio, Moguel Barbara, Solorzano Elizabeth, Dumonteil Eric, Rodas Antonieta, de la Rua Nick, Garnica Roberto, Monroy Carlota
Primary Institution: Loyola University New Orleans
Hypothesis
Is Triatoma dimidiata a complex of species with distinct genetic populations across its geographic range?
Conclusion
The study identifies four distinct groups of Triatoma dimidiata, with one potential cryptic species, highlighting the complexity of its taxonomy and implications for Chagas disease control.
Supporting Evidence
- Approximately 10 million people are infected with Trypanosoma cruzi, the causative agent of Chagas disease.
- Recent evidence suggests T. dimidiata may be a complex of species, which complicates control efforts.
- The nuclear sequence of the internal transcribed spacer 2 (ITS2) divides T. dimidiata into four taxa.
- Group 3, a potential cryptic species, is dispersed across parts of Mexico, Guatemala, and Belize.
Takeaway
Scientists found that the bugs that spread Chagas disease in Mexico and Guatemala are not all the same; some are different kinds that might spread the disease differently.
Methodology
The study analyzed the nuclear ITS2 and mitochondrial cyt b genes from 53 Triatoma dimidiata samples collected across southern Mexico and Central America.
Potential Biases
Potential biases may arise from the geographic distribution of samples and the methods of collection.
Limitations
The study's findings are based on a limited number of samples and may not represent all populations of T. dimidiata.
Participant Demographics
The study involved samples from various regions in Mexico, Guatemala, Belize, Honduras, Nicaragua, and Costa Rica.
Statistical Information
P-Value
p<0.001
Statistical Significance
p<0.001
Digital Object Identifier (DOI)
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