Ecosystem dynamics, biological diversity and emerging infectious diseases

Area of Science:

• Ecology
• Epidemiology
• Infectious Diseases

Background:

• Zoonotic pathogens, originating from animals, frequently emerge in humans.
• Many zoonotic diseases involve multiple host species and vector-borne transmission routes.
• Understanding multi-host systems is crucial for predicting infectious disease dynamics.

Purpose of the Study:

• To review scientific advancements in understanding infectious agent transmission within multi-host systems over the past decade.
• To analyze the impact of host and vector diversity on the dynamics of vector-borne zoonotic infections.
• To propose future research directions for studying emerging infectious diseases in complex ecological settings.

Main Methods:

• Literature review of major scientific developments.
• Analysis of host and vector species richness and composition effects on pathogen prevalence.
• Discussion of contrasting effects in multi-host, vector-borne systems.

Main Results:

• Host and vector species richness can have opposing effects on pathogen prevalence.
• Dilution effect can reduce pathogen prevalence with increased host diversity.
• Increased vector diversity may amplify pathogen prevalence, leading to heterogeneous disease dynamics.

Conclusions:

• Host and vector community ecology significantly influences zoonotic disease transmission.
• A systemic perspective, considering host-vector interactions and life-history traits, is vital for emerging infectious disease research.
• Future research should integrate community ecology principles to better address multi-host disease realities.