The population dynamics of two vertically transmitted infections

Area of Science:

• Epidemiology
• Mathematical Modeling
• Vector-borne Diseases

Background:

• Keystone virus (mosquito Aedes atlanticus) and Rickettsia rickettsii (tick Dermacentor andersoni) are significant vector-borne pathogens.
• Both pathogens exhibit vertical and horizontal transmission routes.
• Vertical transmission is crucial for pathogen maintenance and population dynamics.

Purpose of the Study:

• To model and analyze the transmission dynamics of Keystone virus and Rickettsia rickettsii.
• To investigate the role of vertical transmission in pathogen maintenance and host population control.
• To assess the sensitivity of disease parameters to variations in transmission components.

Main Methods:

• Mathematical modeling of disease transmission.
• Analysis of vertical and horizontal transmission parameters.
• Sensitivity analysis of threshold parameters and prevalence rates.

Main Results:

• Vertical transmission significantly influences pathogen maintenance and host population size.
• Horizontal transmission also contributes to disease spread.
• Disease dynamics are sensitive to transmission efficiency, host population size, and survival rates.

Conclusions:

• Vertical transmission is a key factor in the epidemiology of Keystone virus and Rickettsia rickettsii.
• Understanding transmission components is vital for predicting and controlling vector-borne diseases.
• Mathematical models provide insights into pathogen persistence and population-level effects.