Environmental Factors and Host Microbiomes Shape Host-Pathogen Dynamics.

Area of Science:

• Ecology
• Microbiology
• Disease Ecology

Background:

• Microorganisms play critical roles in host population dynamics and immunity, particularly skin and gut microbiomes.
• Environmental factors (biotic and abiotic) strongly influence disease dynamics.
• Existing disease theory often overlooks the complex interplay between host, microbiome, pathogen, and environment.

Purpose of the Study:

• To investigate the multifaceted interactions between host, host microbiome, pathogen, and environment in disease dynamics.
• To highlight the importance of incorporating environmental factors and microbiomes into disease ecology theory.
• To use amphibians and chytridiomycosis as a model system to explore these interactions.

Main Methods:

• Review of current literature on host-microbiome-pathogen-environment interactions.
• Case study using amphibians affected by chytridiomycosis (caused by Batrachochytrium dendrobatidis).
• Theoretical synthesis to integrate environmental and microbiome influences into disease dynamics.

Main Results:

• Demonstrated that host, host microbiome, pathogen, and environmental factors collectively impact disease outcomes.
• Highlighted the significant, yet often underestimated, role of the environment and associated microbiomes in disease ecology.
• Identified gaps in current theoretical frameworks regarding these complex interactions.

Conclusions:

• Incorporating environmental factors and host microbiomes into disease theory provides a more comprehensive understanding of disease dynamics.
• This integrated approach is essential for advancing disease ecology and conservation efforts.
• Future research should focus on the synergistic effects within host-microbiome-pathogen-environment systems.