Expanding the Pathogenic Potential Concept To Incorporate Fulminancy, Time, and Virulence Factors

Area of Science:

• Microbiology
• Infectious Disease Epidemiology
• Quantitative Biology

Background:

• Traditional classification of microbes as pathogens or non-pathogens is insufficient for understanding virulence.
• The pathogenic potential (PP) concept offers a quantitative framework considering host and microbial contributions.
• Existing PP models do not fully account for the temporal dynamics of infection.

Purpose of the Study:

• To extend the pathogenic potential (PP) concept by incorporating the role of time in virulence.
• To introduce and define a new parameter, 'fulminancy,' measuring the rapidity of the pathogenic process.
• To provide a quantitative method for assessing the contribution of microbial virulence factors.

Main Methods:

• Introduced the parameter 'fulminancy' into the pathogenic potential (PP) equation.
• Developed a framework to calculate PP incorporating the speed of disease progression.
• Proposed using differences in PP between wild-type and mutant microbes to estimate virulence factor contributions.

Main Results:

• Fulminancy allows for PP calculations in scenarios with equal host impact but varying disease onset times.
• This extension accommodates situations where attenuated strains cause disease more slowly.
• The approach enables quantitative estimation of virulence factor impact on pathogenicity.

Conclusions:

• The extended PP concept, including fulminancy, provides a more comprehensive understanding of microbial virulence.
• This quantitative approach offers new insights into host-microbe interactions and disease dynamics.
• The framework facilitates the study of microbial pathogenicity and the role of specific virulence factors.