Abstract
Source of infection refers to both people and animals with pathogens growing and reproducing inside the body and are capable of expelling the pathogens out of the body to invade another organism. It is a cycle with the pathogens growing and reproducing within an organism, followed by being expelled out of the organism to invade another. Some intermedia, such as water, food, and others, can carry pathogens into another susceptible organism. However, these intermedia fail to serve as a place for their long-term survival and reproduction in large quantities rather function as a carrier or transfer station for their spreading. Therefore, the intermedia are not a source of infection. The source of human infectious diseases can be categorized into two groups, namely, humans and animals. It can be further divided into the following four subgroups:
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© 2015 Springer Science+Business Media Dordrecht and People's Medical Publishing House
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Liu, B., Yang, X., Kong, L. (2015). Epidemiology of Infectious Diseases. In: Li, H. (eds) Radiology of Infectious Diseases: Volume 1. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-9882-2_8
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DOI: https://doi.org/10.1007/978-94-017-9882-2_8
Publisher Name: Springer, Dordrecht
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