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Why is HIV not vector-borne?

Troy Day1, Nicole Mideo2, Samuel Alizon3

  • 1Department of Mathematics and Statistics, Queen's University Kingston, Ontario, Canada ; Department of Biology, Queen's University Kingston, Ontario, Canada.

Evolutionary Applications
|January 9, 2015
PubMed
Summary
This summary is machine-generated.

Human Immunodeficiency Virus (HIV) is not transmitted by arthropods like mosquitoes. Evolutionary pressures likely prevent HIV strains capable of arthropod transmission from spreading effectively.

Keywords:
AIDSdiseaseevolutionary medicineinsect-borne transmissionmosquito

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Area of Science:

  • Evolutionary biology
  • Virology
  • Public health

Background:

  • Many human pathogens, including Malaria and Hepatitis B, are blood-borne and transmitted by arthropods.
  • Human Immunodeficiency Virus (HIV) is a notable exception, lacking arthropod-borne transmission despite being blood-borne.

Purpose of the Study:

  • To explore the evolutionary reasons behind the absence of arthropod transmission for HIV.
  • To investigate potential evolutionary constraints on the development of mechanical and biological transmission of HIV by arthropods.

Main Methods:

  • Review of empirical evidence for arthropod transmission of HIV.
  • Analysis of HIV's life cycle and evolutionary dynamics in the context of arthropod vectors.
  • Consideration of selective pressures acting on HIV within and between hosts.

Main Results:

  • Mechanical transmission of HIV by arthropods is unlikely to have evolved because such strains would likely accelerate the onset of Acquired Immunodeficiency Syndrome (AIDS), limiting their spread.
  • Biological transmission of HIV by arthropods is less clear; potential explanations include a lack of necessary genetic variation in HIV or conflicts in natural selection pressures.

Conclusions:

  • An evolutionary perspective is crucial for understanding the lack of arthropod transmission in HIV.
  • Understanding these evolutionary dynamics can inform public health interventions and predict potential consequences.