Anatomy & Physiology Immune #8

Question

Which is an example of vector transmission?

Answers

  1. A mosquito.
    • Rationale:

      A mosquito is an example of a vector in the chain of infection. Specifically, it is a means of transmission.

  2. A measles infection.
    • Rationale:

      A measles infection, while a pathogen, is not a vector. A vector is a live being.

  3. Contaminated water.
    • Rationale:

      While contaminated water may be pathogenic and a means of transmission when a human comes into direct contact with it, it is not an example of a vector. A vector is a live being.

  4. Contaminated door handle.
    • Rationale:

      While a contaminated door handle may be pathogenic and a means of transmission when a human comes into direct contact with it, it is not an example of a vector. A vector is a live being.

Overview

The chain of infection is made up of six different links: a pathogen (i.e., infectious agent); reservoir; portal of exit; means of transmission; portal of entry, and the new host.

Explanation

Learning Outcomes

A vector is a method of the means of transmission in the chain of infection. Vectors, unlike vehicles, are live beings. Examples of vectors include mosquitos and that spread infections with relatively direct mechanical means (e.g., insect bite).

Test Taking Tip

Consider the different modes of transmission regarding the chain of infection when answering this question.

Video Rationale