Infectivity
Inepidemiology,infectivityis the ability of apathogento establish an infection. More specifically, infectivity is the extent to which the pathogen can enter, survive, and multiply in a host. It is measured by the ratio of the number of people who become infected to the total number exposed to the pathogen.[1]
Infectivity has been shown topositively correlatewithvirulence,in plants. This means that as a pathogen's ability to infect a greater number of hosts increases, so does the level of harm it brings to the host.[2]
A pathogen's infectivity is different from itstransmissibility,which refers to a pathogen's capacity to pass from one organism to another.[1]
See also[edit]
- Basic reproduction number(basic reproductive rate, basic reproductive ratio,R0,orr nought)
References[edit]
- ^abOxford textbook of global public health(6th ed.). Oxford: Oxford university press. 2015. p. 1486.ISBN978-0-19-966175-6.
- ^Stewart, AD; Logsdon, JM; Kelley, SE (April 2005). "An empirical study of the evolution of virulence under both horizontal and vertical transmission".Evolution.59(4): 730–739.doi:10.1554/03-330.PMID15926685.S2CID924610.
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