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Diversity of Protists II01:27

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Alveolates are a group of organisms recognized by the presence of alveoli, which are cytoplasmic sacs located beneath the cell membrane. While their function remains uncertain, alveoli may help regulate water balance by controlling how much water enters and leaves the cell. In dinoflagellates, these structures may serve as armor plates. There are three major types of alveolates: ciliates, which move using cilia; dinoflagellates, which use flagella for movement; and apicomplexans, which are...
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Amoebozoa represent a diverse group of terrestrial and aquatic protists that utilize lobe-shaped pseudopodia for locomotion and feeding. This characteristic differentiates them from the Rhizaria, which possess threadlike pseudopodia. The primary classifications within Amoebozoa include gymnamoebas, entamoebas, and the plasmodial and cellular slime molds. Phylogenetic evidence indicates that Amoebozoa diverged from a lineage that ultimately gave rise to fungi and animals.Gymnamoebas and...
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Multi-locus Variable-number Tandem-repeat Analysis of the Fish-pathogenic Bacterium Yersinia ruckeri by Multiplex PCR and Capillary Electrophoresis
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Exposing the diversity of multiple infection patterns.

Mircea T Sofonea1, Samuel Alizon1, Yannis Michalakis1

  • 1Laboratoire MIVEGEC (UMR CNRS 5290, IRD 224, UM), 911 avenue Agropolis, B.P. 64501, 34394 Montpellier Cedex 5, France.

Journal of Theoretical Biology
|February 15, 2017
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Summary

Parasite evolution models often oversimplify host infections. This study reveals over 100 possible infection patterns for microparasites, expanding our understanding of host-parasite dynamics and evolution.

Keywords:
CoinfectionCooperationEpidemiologyInfection patternPublic goodsSpiteSuperinfectionWithin-host interactions

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Area of Science:

  • Evolutionary biology
  • Parasitology
  • Theoretical ecology

Background:

  • Theoretical models of parasite evolution often simplify within-host dynamics to just superinfection or coinfection.
  • This dichotomy overlooks the complex reality of multiple infections in natural populations.
  • Existing frameworks fail to capture the full spectrum of host-parasite interactions.

Purpose of the Study:

  • To challenge the limited dichotomy in theoretical models of parasite virulence.
  • To formally identify and describe the extensive range of possible within-host infection patterns.
  • To introduce a new framework for understanding host-parasite dynamics and evolution.

Main Methods:

  • Formal mathematical proof to determine the number of infection patterns.
  • Explicit modeling of within-host dynamics for microparasite infections.
  • Ecological interaction analysis to categorize infection patterns.

Main Results:

  • Over one hundred distinct infection patterns exist for chronic infections with two microparasites.
  • Eight key infection patterns are highlighted, including five previously neglected ones.
  • New terminology is introduced to accurately describe these diverse infection patterns.

Conclusions:

  • The study expands the theoretical framework for understanding within-host parasite dynamics.
  • Recognizing diverse infection patterns is crucial for advancing parasite evolution and epidemiology research.
  • This work provides a foundation for linking within-host and between-host dynamics more effectively.