Horizontal transmission

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Horizontal transmission (pronunciation: /hɔːrɪˈzɒntəl trænsˈmɪʃən/) is a term used in the field of epidemiology to describe the transfer of pathogens or genetic material from one individual to another within the same generation or peer group. It is contrasted with vertical transmission, where pathogens or genetic material are transferred from parent to offspring.

Etymology

The term "horizontal transmission" is derived from the concept of a horizontal plane, indicating a transfer that occurs across a generation or peer group, rather than vertically from parent to offspring.

Types of Horizontal Transmission

There are several types of horizontal transmission, including:

  • Direct transmission: This occurs when the pathogen is transferred directly from one individual to another. This can occur through physical contact, droplet spread, or sexual contact.
  • Indirect transmission: This occurs when the pathogen is transferred from one individual to another via an intermediary, such as a vector (like a mosquito), a fomite (an inanimate object), or the environment.
  • Airborne transmission: This occurs when pathogens are carried by dust or droplet nuclei suspended in the air.

Related Terms

See Also

External links

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