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Among the three main modes of HGT—transformation, conjugation, and transduction—transduction is unique in that it is mediated by bacteriophages, or bacterial viruses.Transduction occurs in two ways. Generalized transduction occurs during the lytic cycle of a bacteriophage infection. In this process, bacteriophages infect bacterial cells, replicate within them, and ultimately cause cell lysis, releasing newly assembled virions. Occasionally, random fragments of the bacterial genome...
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Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
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The evolution of transmission mode.

Janis Antonovics1, Anthony J Wilson2, Mark R Forbes3

  • 1Department of Biology, University of Virginia, Charlottesville, VA 22904, USA ja8n@virginia.edu.

Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
|March 15, 2017
PubMed
Summary

Evolutionary shifts in pathogen transmission modes, influenced by host-pathogen genetics and trade-offs, are crucial for understanding disease dynamics. Research highlights the need for better data and methods to study these complex evolutionary changes.

Keywords:
complex life cycleshost shiftsinfectious diseasespill-over

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Area of Science:

  • Evolutionary biology
  • Parasitology
  • Epidemiology

Background:

  • Pathogen transmission modes are often genetically controlled by hosts or pathogens, leading to evolutionary conflicts and trade-offs.
  • Transmission strategies can differ across pathogen strains and host populations, complicating evolutionary analyses.
  • Understanding these evolutionary dynamics is vital for addressing current disease threats.

Purpose of the Study:

  • To review research on the evolutionary mechanisms driving diverse pathogen transmission modes.
  • To identify knowledge gaps and methodological challenges in studying transmission mode evolution.
  • To emphasize the urgency of this research for public health.

Main Methods:

  • Review of experimental and phylogenetic studies on transmission mode evolution.
  • Analysis of theoretical approaches combining epidemiology and population genetics.
  • Focus on the vertical versus horizontal transmission dichotomy as a primary research area.

Main Results:

  • Evolutionary changes in transmission modes are linked to host shifts and complex parasite life cycles.
  • Theoretical models offer insights into the speed and conditions for new transmission mode evolution.
  • Empirical data and methodologies are lacking for many transmission transition types.

Conclusions:

  • Further empirical investigation and application of theoretical frameworks are needed to understand transmission mode evolution.
  • Addressing data and conceptual limitations is critical for predicting and managing disease emergence.
  • This research is essential for combating extant infectious disease threats.