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What are vectors. How do they spread diseases.

Solution
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Vector: it can be defined as an arthropod or any living organisms which carry or transport and infectious agent to a susceptible individuals. Vectors themselves are not an infectious agents. Example mosquito, flies, cockroaches, rats, etc.
Spreading diseases: vector like mosquito spread diseases arthropods bites an infected person or animal and ingests some of the infected blood. The pathogens then reproduce in the vector, and the increase in the number of pathogens increase the possibility that they will be transmitted to another host. And transport of the pathogens on the insects feet or body parts. This mode of transmission means the pathogens the transfer of pathogens from an infected host or a contaminated substrate to a susceptible host

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