𝔖 Bobbio Scriptorium
✦   LIBER   ✦

On the Relationship Between Evolution of Virulence and Host Demography

✍ Scribed by Carlos Castillo-Chavez; Jorge X. Velasco-Hernández

Publisher
Elsevier Science
Year
1998
Tongue
English
Weight
212 KB
Volume
192
Category
Article
ISSN
0022-5193

No coin nor oath required. For personal study only.

✦ Synopsis

The effects of density-dependence on the evolution of virulence in super-infection models is the theme of this paper. The qualitative dynamics of three host-pathogen systems are studied numerically in a virulence-superinfection parameter landscape. It is shown numerically that pathogen's competitive exclusion coexistence and host population extinction depend heavily of the population dynamics of the host population. Reported patterns of diversity found using models without demography, are insufficient to account for the coevolutionary dynamics under defined selective pressures. Specifically, virulence and superinfection in the presence of a variable host population give rise to threshold values that divide (as switches) the regions of coexistence and competitive exclusion. Tight coevolution on a variable host population may occur within regions of parameter space that are not connected. We present our numerical results using a simple host-disease system where a homogeneous host population is invaded by two competing pathogen strains (partial analytical results will be published elsewhere).Copyright 1998 Academic Press Limited

📜 SIMILAR VOLUMES

Population Dynamics and the Evolution of
Population Dynamics and the Evolution of Virulence in Epidemiological Models with Discrete Host Generations
✍ Jacob C. Koella; Michael Doebeli 📂 Article 📅 1999 🏛 Elsevier Science 🌐 English ⚖ 296 KB

Chaos is the likely outcome of the interaction between a parasite and a host with discrete generations, if the parasite's virulence is high and if transmission from one generation to the next is held constant. We studied two alternative routes of transmission-vertical transmission from infecteds to

The Evolution of Virulence in Parasites
The Evolution of Virulence in Parasites and Pathogens: Reconciliation Between Two Competing Hypotheses
✍ Richard E. Lenski; Robert M. May 📂 Article 📅 1994 🏛 Elsevier Science 🌐 English ⚖ 777 KB

According to conventional wisdom, parasites and pathogens should evolve reduced virulence to their hosts, because more virulent parasites and pathogens are more likely to drive their hosts, and themselves, to extinction. But this view has been criticized for its reliance on group selection. Accordin

Study on the relationship between damage
Study on the relationship between damage of oil-impregnated insulation paper and evolution of phase-resolved partial discharge patterns
✍ Ruijin Liao; Jiaming Yan; Lijun Yang; Mengzhao Zhu; Bin Liu 📂 Article 📅 2010 🏛 John Wiley and Sons 🌐 English ⚖ 552 KB

## Abstract This paper studied the relationships between evolution of phase‐resolved partial discharge (PRPD) patterns and damaging characteristics, such as surface topography, surface roughness, and surface conductivity, and the constitution of gas within cavity for oil‐impregnated insulation pape