Dengue Virus Strain Displacement and Mosquito Infectivity
Author Information
Author(s): Hanley Kathryn A, Nelson Jacob T, Schirtzinger Erin E, Whitehead Stephen S, Hanson Christopher T
Primary Institution: Department of Biology, New Mexico State University
Hypothesis
Differences between the invasive and native strain in their infectivity for Aedes aegypti mosquitoes contributed to the competitive success of the invasive strain.
Conclusion
The invasive DENV3 strain infects and disseminates in Ae. aegypti more efficiently than the displaced native DENV3 strain, suggesting that the invasive strain is transmitted more efficiently.
Supporting Evidence
- The invasive strain replicated to significantly higher titers in the midgut and disseminated with significantly greater efficiency than the native strain.
- Both strains infected a similar proportion of mosquitoes, but the invasive strain had a higher mean virus titer in infected mosquitoes.
- The invasive DENV3 strain generated a significantly higher percentage of disseminated infections than the native DENV3 strain.
Takeaway
Some types of dengue virus are better at infecting mosquitoes than others, which helps them spread more easily and replace older strains.
Methodology
The study measured the ability of native and invasive DENV3 strains to infect and replicate in Aedes aegypti mosquitoes through in vivo experiments.
Potential Biases
Potential bias due to the use of artificial bloodmeals instead of natural ones for mosquito infection.
Limitations
The study's findings may not apply to all populations of Aedes aegypti, as susceptibility can vary among different strains.
Participant Demographics
The study focused on Aedes aegypti mosquitoes from the NIH colony.
Statistical Information
P-Value
0.02
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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