An infected animal capable of pathogenic transmission from one host to another. Arthropod examples: Mosquitos (transmit malaria) and lice (transmit typhus). Non-arthropod examples: Mammals (rabies) and chickens (avian influenza)

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Biological transmission is a form of vector transmission that occurs when a pathogen is carried inside the body of an animal vector, such as an arthropod, and is transmitted to a new host, typically through biting.

Biological Vector Transmission

Types of disease vectors include:
- Mechanical vector
- Biological vector

Types of Disease Vectors

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Biological Transmission Example (Figure 16.12b). Reprinted from OpenStax Microbiology (p. 668), by N. Parker, M. Shneegurt, A.-h. Thi Tu, B. M. Forester, and P. Lister, 2016, Rice University. Copyright 2016 by Rice University. Available at: https://openstax.org/books/microbiology/pages/16-3-modes-of-disease-transmission

Biological Transmission Example

Biological Vector

An animal that can transfer a pathogen from one host to another without itself being infected

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