Data from: The context dependent effects of host competence, competition, and the pathogen transmission mode on disease prevalence

Biodiversity in communities is changing globally, including the gain and
loss of host species in host-pathogen communities. Increased host
diversity can cause infection prevalence in a focal host to increase
(amplification) or decrease (dilution).  However, it is unclear
what general rules govern the context dependent effects, in part because
theories for pathogens with different transmission modes have developed
largely independently.  Using a two-host model, we explore how
the pathogen transmission mode and characteristics of a second host
(disease competence and competitive ability) influence disease prevalence
in a focal host.  Our work shows how the theories for pathogens
with environmental transmission, density-dependent direct transmission,
and frequency-dependent direct transmission can be unified.  Our
work also identifies general rules about how host and pathogen
characteristics affect amplification/dilution.  For example,
higher competence hosts promote amplification, unless they are strong
interspecific competitors; strong interspecific competitors promote
dilution, unless they are large sources of new infections; and dilution
occurs under frequency-dependent direct transmission more than
density-dependent direct transmission, unless interspecific host
competition is sufficiently strong.  Our work helps explain how
the characteristics of the pathogen and a second host affect disease
prevalence in a focal host.