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During embryogenesis, cells become progressively committed to different fates through a two-step process: specification followed by determination. Specification is demonstrated by removing a segment of an early embryo, “neutrally” culturing the tissue in vitro—for example, in a petri dish with simple medium—and then observing the derivatives. If the cultured region gives rise to cell types that it would normally generate in the embryo, this means that it is specified. In...
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Hantaviruses and a neglected environmental determinant.

Alexandro Guterres1, Elba Regina Sampaio de Lemos1

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One Health (Amsterdam, Netherlands)
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Understanding hantavirus transmission dynamics is crucial. This review emphasizes ecological interactions and environmental factors influencing hantavirus spread in various hosts and systems.

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Area of Science:

  • Ecology
  • Virology
  • Epidemiology

Background:

  • Hantaviruses cause severe, fatal hemorrhagic fevers, notably hantavirus cardiopulmonary syndrome.
  • Increased outbreaks and international spread drive interest in hantavirus transmission and environmental factors.
  • Reservoir hosts like rodents, shrews, moles, and bats harbor hantaviruses, with infection prevalence influenced by ecological factors.

Purpose of the Study:

  • To review current knowledge on hantavirus transmission dynamics.
  • To explore the impact of climate change and landscape alteration on hantavirus transmission.
  • To highlight the need for understanding ecological mechanisms, including trophic interactions and predation risk, in hantavirus spread.

Main Methods:

  • Literature review of ecological and epidemiological studies on hantavirus transmission.
  • Analysis of factors influencing hantavirus prevalence in reservoir hosts.
  • Examination of indirect effects, such as predation risk, on disease transmission.

Main Results:

  • Hantavirus transmission is influenced by climate change and landscape alterations, with variable outcomes across different viruses and biomes.
  • Underlying mechanisms of hantavirus transmission remain largely unknown, necessitating further research.
  • Ecological interactions across trophic levels are critical for understanding disease dynamics.

Conclusions:

  • A comprehensive ecological framework is needed to understand hantavirus transmission in natural and altered systems.
  • Investigating density- and trait-mediated indirect effects is key to elucidating disease ecology.
  • Further research into the complex interplay of factors affecting hantavirus transmission is essential.