Vector transmission occurs when the pathogen is carried to a susceptible host through an outside agent.

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21-12-2024
Health

College

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Vector transmission occurs when the pathogen is carried to a susceptible host through an outside agent.

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NandiniB NandiniB · Answer 1 · 2023-12-15T04:00:38-05:00

Vector transmission occurs when a living organism carries an infectious agent from one host to another. There are two main types of vector transmission: mechanical and biological.

Mechanical Transmission: In this type, the vector (an animal, typically an arthropod) carries the pathogen on its body without being infected itself. For example:
- A fly lands on fecal matter, picking up bacteria.
- The fly then lands on food, transferring the bacteria.
- A human eats the contaminated food and becomes sick.
Biological Transmission: In this type, the vector itself becomes infected with the pathogen, which then replicates inside the organism. The pathogen is then transferred to another host, usually through a bite. For example:
- A mosquito bites an infected person, picking up the pathogen in its blood.
- The pathogen reproduces inside the mosquito.
- The mosquito then bites another person, transmitting the infection.

Examples of vectorborne diseases include malaria, which is transmitted by mosquitoes, and Lyme disease, which is transmitted by ticks. Understanding vector transmission is essential in controlling the spread of various infectious diseases.